CN107219148A - A kind of experimental method for being applied to coal body adsorption-desorption deformation test under HTHP - Google Patents
A kind of experimental method for being applied to coal body adsorption-desorption deformation test under HTHP Download PDFInfo
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- 238000002336 sorption--desorption measurement Methods 0.000 title claims abstract description 155
- 239000003245 coal Substances 0.000 title claims abstract description 150
- 238000012360 testing method Methods 0.000 title claims abstract description 62
- 238000002474 experimental method Methods 0.000 title claims abstract description 46
- 238000002347 injection Methods 0.000 claims abstract description 18
- 239000007924 injection Substances 0.000 claims abstract description 18
- 239000007789 gas Substances 0.000 claims description 168
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 130
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 79
- 239000001307 helium Substances 0.000 claims description 57
- 229910052734 helium Inorganic materials 0.000 claims description 57
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 claims description 57
- 238000001179 sorption measurement Methods 0.000 claims description 55
- 238000000034 method Methods 0.000 claims description 36
- 230000033228 biological regulation Effects 0.000 claims description 31
- 238000003795 desorption Methods 0.000 claims description 31
- 230000008859 change Effects 0.000 claims description 23
- 230000008569 process Effects 0.000 claims description 19
- 239000011888 foil Substances 0.000 claims description 17
- 239000000243 solution Substances 0.000 claims description 17
- 238000010521 absorption reaction Methods 0.000 claims description 16
- 230000006835 compression Effects 0.000 claims description 12
- 238000007906 compression Methods 0.000 claims description 12
- 238000001035 drying Methods 0.000 claims description 10
- 238000001816 cooling Methods 0.000 claims description 9
- 238000001125 extrusion Methods 0.000 claims description 9
- 238000005259 measurement Methods 0.000 claims description 9
- 241000486406 Trachea Species 0.000 claims description 8
- 230000005611 electricity Effects 0.000 claims description 8
- 210000003437 trachea Anatomy 0.000 claims description 8
- 238000011049 filling Methods 0.000 claims description 6
- 230000001105 regulatory effect Effects 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 5
- 150000001335 aliphatic alkanes Chemical class 0.000 claims description 4
- 238000004364 calculation method Methods 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 238000000605 extraction Methods 0.000 abstract description 8
- 238000011160 research Methods 0.000 abstract description 5
- 239000000523 sample Substances 0.000 description 55
- 238000005553 drilling Methods 0.000 description 6
- 230000035699 permeability Effects 0.000 description 4
- 238000012937 correction Methods 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 239000012488 sample solution Substances 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000004781 supercooling Methods 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
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- G—PHYSICS
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N7/00—Analysing materials by measuring the pressure or volume of a gas or vapour
- G01N7/02—Analysing materials by measuring the pressure or volume of a gas or vapour by absorption, adsorption, or combustion of components and measurement of the change in pressure or volume of the remainder
- G01N7/04—Analysing materials by measuring the pressure or volume of a gas or vapour by absorption, adsorption, or combustion of components and measurement of the change in pressure or volume of the remainder by absorption or adsorption alone
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- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/16—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring the deformation in a solid, e.g. by resistance strain gauge
- G01B7/18—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring the deformation in a solid, e.g. by resistance strain gauge using change in resistance
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/22—Fuels; Explosives
- G01N33/222—Solid fuels, e.g. coal
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N7/00—Analysing materials by measuring the pressure or volume of a gas or vapour
- G01N7/14—Analysing materials by measuring the pressure or volume of a gas or vapour by allowing the material to emit a gas or vapour, e.g. water vapour, and measuring a pressure or volume difference
- G01N7/16—Analysing materials by measuring the pressure or volume of a gas or vapour by allowing the material to emit a gas or vapour, e.g. water vapour, and measuring a pressure or volume difference by heating the material
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Abstract
A kind of experimental method for being applied to coal body adsorption-desorption deformation test under HTHP, the experimental method, which is used, is applied to coal body adsorption-desorption deformation test device progress under HTHP, it is adaptable to which coal body adsorption-desorption deformation test device includes pumped vacuum systems, gas injection system, adsorption-desorption deformation test system and gas metering system under HTHP；Pumped vacuum systems includes vavuum pump and vacuum tank, and the air inlet of vavuum pump is connected by the gas outlet of the first tracheae and vacuum tank, and the first tracheae is provided with the first stop valve, and the air inlet of vacuum tank is connected with the second tracheae；In summary, the present invention be easy to that operation, workload are small, measure quick and precisely, experimental performance it is high, provide and test and theoretical research for the adsorption-desorption cubic deformation during coal bed gas extraction.
Description
Technical field
The present invention relates to a kind of experimental method for being applied to coal body adsorption-desorption deformation test under HTHP.
Background technology
Coal and the Basic Science Problem that gas interaction mechanism is Gas Disaster prevention and control field research, Study on Coal and gas
Interaction mechanism not only has directive function to mine coal rock gas dynamic disaster study mechanism, while the also extraction to coal bed gas
Important theory support is provided.
At present, coal-bed gas exploitation mainly utilizes various drillings before seam mining or in recovery process（Surface drilling, sheet
Coal bed drilling, roof and floor layer-through drilling, adjacent layer layer-through drilling, goaf drilling etc.）Extraction is carried out to coal bed gas, if necessary also
It is aided with the measures such as waterpower or explosion increase gas permeability of coal seam, improves coal bed gas extraction amount.In the mining area of complex geologic conditions, though
Right coal bed gas content is higher, but permeability is low, and extraction is difficult, it is necessary to which construct many rock gangways and borehole engineering, spend substantial amounts of wealth
Power, material resources and time, cause colliery excavation replacement difficult, considerably increase production cost.
Coal bed gas is largely present in coal seam with physical absorption state, and the exploitation of low permeability coal seam gas is difficult to be mainly coal seam
Gas is desorbed and seepage flow is difficult, therefore artificial increase gas permeability of coal seam is the main method of current coal-bed gas exploitation.On the other hand, coal
Body environment temperature is raised, the increase of gas heat content, can also improve the desorption quantity of coal bed gas, this is also generally deposited in other adsorption phenomenas
, under certain condition temperature to adsorption/desorption even play decisive role.If promoting coal body heating to promote coal bed gas
Desorption, seepage flow diffusion can also drive coal seam flow of air in coal seam, cause coal bed gas desorption, seepage flow, coal body heat transfer etc. one
The change of system, and then have influence on the exploitation of coal bed gas.But the absorption to building coal body under high temperature and high pressure environment during heat injection
Adsorption law is not clear, especially for coal deformation situation during the adsorption-desorption of coal body under high temperature and high pressure environment,
Need to carry out experiment and theoretical research in a deep going way.Therefore for case above, how under researching high-temperature hyperbaric environment coal body absorption
Coal deformation situation in desorption process, needs the technical problem of research badly as coal bed gas extraction technical field.
The content of the invention
The present invention being capable of coal body under researching high-temperature hyperbaric environment there is provided one kind in order to solve weak point of the prior art
Adsorption-desorption during coal deformation situation be applied to HTHP under coal body adsorption-desorption deformation test experimental method.
In order to solve the above technical problems, the present invention is adopted the following technical scheme that：One kind is applied to coal body under HTHP and inhaled
The experimental method of attached desorption deformation test, the experimental method, which is used, is applied to coal body adsorption-desorption deformation test dress under HTHP
Put progress, it is adaptable to which coal body adsorption-desorption deformation test device includes pumped vacuum systems, gas injection system, absorption solution under HTHP
Inhale deformation test system and gas metering system；
Pumped vacuum systems includes vavuum pump and vacuum tank, and the air inlet of vavuum pump passes through the first tracheae and the outlet of vacuum tank
Mouth connection, the first tracheae is provided with the first stop valve, and the air inlet of vacuum tank is connected with the second tracheae, the second tracheae along gas
Stream direction is sequentially provided with balloon and the second stop valve, and balloon is connected by the 3rd tracheae with the second tracheae, and the 3rd tracheae is provided with
3rd stop valve, vacuum tank is provided with vacuum meter；
Gas injection system includes methane gas tank and high pressure helium gas tank, and methane gas tank passes through the 4th tracheae and adsorption-desorption deformation test system
The inlet end connection of system, is sequentially provided with high pressure gauge, the first pressure-reducing valve, low-pressure meter, booster pump, the on the 4th tracheae along airflow direction
Four stop valves, check valve, pressure regulator valve, the 5th stop valve and the 6th stop valve, high pressure helium gas tank pass through high-voltage tube and the 4th tracheae
The junction of connection, high-voltage tube and the 4th tracheae is located between the 4th stop valve and check valve, and high-voltage tube is provided with the 7th cut-off
Valve；
Gas metering system includes data acquisition control computer, electronic balance, constant temperature water pot and water tank, and water tank is located at constant temperature water pot
Interior, constant temperature water pot is connected with water injection pipe, and water injection pipe is provided with the 9th stop valve, and water tank is provided with first pressure table and the first temperature
Sensor, water tank is connected by the 6th tracheae with the outlet side of adsorption-desorption deformation test system, along air-flow side on the 6th tracheae
To being sequentially provided with second pressure table, the second pressure-reducing valve, the tenth stop valve, refrigerator, drier and the 11st stop valve, water tank
Bottom is connected with outlet pipe, and outlet pipe is provided with the 12nd stop valve, and the delivery port of outlet pipe is located at the top of electronic balance；Number
According to acquisition control computer by data wire respectively with first pressure table, second pressure table, the first temperature sensor and electronic balance
Connection；
Adsorption-desorption deformation test system includes being provided with adsorption-desorption tank in resistance strain gauge and sealed thermostat case, sealed thermostat case
And equilibrium still, adsorption-desorption tank includes tank body and cover, and cover is connected to the top of tank body, cover and tank body by fastening bolt
Between junction be provided with refractory seals ring, cover is provided with the 3rd pressure gauge and second temperature sensor, and tank body is provided with
A hollow bolt is equipped with four mounting holes, each mounting hole, high temperature resistant is provided between hollow bolt and mounting hole inwall
Sealing ring, four hollow bolts are respectively that resistance to height is provided with inlet suction port, air outlet adapter, terminal and standby joint, tank body
Warm resistance strain gage；Resistance strain gauge is connected by the data wire being located in terminal with high temperature resistant resistance foil gauge；First
Alkane gas tank is connected by the 4th tracheae with equilibrium still, and equilibrium still is provided with the 4th pressure gauge and three-temperature sensor；Absorption solution
The inlet suction port of cucurbitula is connected by the 5th tracheae with the 4th tracheae, and the junction of the 5th tracheae and the 4th tracheae is located at the 5th section
Only between valve and the 6th stop valve；5th tracheae is provided with the 8th stop valve；The air outlet adapter of adsorption-desorption tank passes through the 6th gas
Pipe is connected with gas metering system；3rd pressure gauge, the 4th pressure gauge, second temperature sensor, three-temperature sensor and electricity
Resistance deformeter is connected by data wire with data acquisition control computer respectively；
Suitable for the experimental method of coal body adsorption-desorption deformation test under HTHP, comprise the following steps：
（1）, survey calculation equilibrium still volume VKettleWith the volume V of adsorption-desorption tankTank；
（2）, install coal sample：The raw coal taken out from coal seam is fabricated to the coal sample of cuboid or cylinder according to the volume of tank body,
And high temperature resistant resistance foil gauge is arranged on to the surface of coal sample, then coal sample is positioned in tank body, by high temperature resistant foil gauge
Data wire is connected after being drawn at terminal with resistance strain gauge；
（3）, measurement adsorption-desorption tank in free volume VFrom；
（4）, carry out methane isothermal constant volume coal sample adsorption-desorption deformation test；
（5）, carry out methane alternating temperature level pressure coal sample adsorption-desorption deformation test；
（6）, carry out methane alternating temperature constant volume coal sample adsorption-desorption deformation test.
Step（1）The method of middle measurement equilibrium still and adsorption-desorption tank volume, comprises the following steps：
（1-1）, close sealed thermostat case and all valves, the 6th stop valve, the 8th stop valve, first are then opened successively
Stop valve and the second stop valve, start vavuum pump equilibrium still and adsorption-desorption tank be evacuated to vacuum degree to 4Pa with
Under, maintain to close the 6th stop valve, the 8th stop valve, the first stop valve and the second stop valve after 30min；
（1-2）, the helium opened in high pressure helium gas tank and the 7th stop valve, high pressure helium gas tank enter the 4th gas through high-voltage tube
Pipe, after causing the 4th endotracheal helium pressure to be 0.5MPa through pressure regulation valve regulation, opens the 5th stop valve and the 6th stop valve,
4th endotracheal helium is poured in equilibrium still, after the temperature and pressure in ready to balance kettle is stable, is shown on the 4th pressure gauge of record
The value P shown1 kettle；It is then switched off the 6th stop valve and opens the 8th stop valve, the 4th endotracheal helium pours adsorption-desorption tank
It is interior, after temperature and pressure is stable in solution cucurbitula to be adsorbed, the value P shown on the 3rd pressure gauge of record1 tank, closing high pressure helium gas tank,
7th stop valve, the 5th stop valve and the 8th stop valve, stop inflation operation；
（1-3）, open the 6th stop valve and the 8th stop valve, after ready to balance kettle and adsorption-desorption pressure inside the tank are stable, record the
The value P shown on three pressure gauges1 is flat, open the 3rd stop valve, the helium in equilibrium still and adsorption-desorption tank through the second tracheae and
3rd tracheae enters in balloon, and the 3rd stop valve is closed when balloon not reflation；
（1-4）, open adsorption-desorption tank cover, be put into V known to volumeMarkSolid standard component, sealing of tank cover is installed again
On tank body, repeat step（1-1）-（1-3）, and recording step（1-2）In the value P that shows on the 4th pressure gauge2 kettles, the 3rd pressure
The value P shown on power table2 tanksAnd step（1-3）The value P shown after middle balance on the 3rd pressure gauge2 is flat；
（1-5）, according to below equation group calculated equilibrium kettle VKettleAnd adsorption-desorption tank VTankVolume, i.e.,：
Repeat step（1-1）-（1-5）Five times, ask for VKettleAnd VTankAverage value.
Step（3）Free volume V in middle measurement adsorption-desorption tankFromMethod, comprise the following steps：
（3-1）, pass through step（1-1）Vacuumize process is carried out to equilibrium still and adsorption-desorption tank；
（3-2）, the helium opened in high pressure helium gas tank and the 7th stop valve, high pressure helium gas tank enter the 4th gas through high-voltage tube
Pipe, after causing the 4th endotracheal helium pressure to be 0.5MPa through pressure regulation valve regulation, opens the 5th stop valve and the 6th stop valve,
4th endotracheal helium is poured in equilibrium still, after the temperature and pressure in ready to balance kettle is stable, is shown on the 4th pressure gauge of record
The value P shown1；High pressure helium gas tank, the 7th stop valve and the 5th stop valve are then switched off, is opened in the 8th stop valve, equilibrium still
Helium is poured in adsorption-desorption tank through the 5th tracheae, after temperature and pressure is stable in solution cucurbitula to be adsorbed, records the 3rd pressure gauge
The value P of upper display2；
（3-3）, according to Boyle's law calculate adsorption-desorption tank in free volume：
V in formulaFromFor the free volume in adsorption-desorption tank, unit cm3；P1For the initial pressure of helium in equilibrium still；P2For balance
The residual compression of helium in kettle；VKettleFor the volume of equilibrium still, unit cm3。
Step（4）The middle method for carrying out methane isothermal constant volume coal sample adsorption-desorption deformation test, comprises the following steps：
（4-1）, pass through step（1-1）Vacuumize process is carried out to equilibrium still and adsorption-desorption tank；
（4-2）, open methane gas tank and the first pressure-reducing valve, booster pump, the 4th stop valve and pressure regulator valve on the 4th tracheae, warp
After pressure regulation valve regulation cause the 4th endotracheal pressure of methane it is constant, and the 4th endotracheal pressure of methane value 1.0MPa ~
In 16MPa, the 5th stop valve and the 6th stop valve are opened afterwards so that methane enters in equilibrium still, when the pressure in equilibrium still
After stable, methane gas tank, the first pressure-reducing valve, booster pump, the 4th stop valve, pressure regulator valve, the 5th stop valve and the 6th cut-off are closed
Valve, stops inflation operation, then records the value P shown on now equilibrium still on the 4th pressure gauge3；
（4-3）, open resistance strain gauge and carry out zeroing work, then open the 6th stop valve and the 8th stop valve, equilibrium still
Begin through the 5th tracheae and be passed through methane gas into absorption parsing tank, high temperature resistant resistance foil gauge gathered data is simultaneously transferred to electricity
Deformeter is hindered, the data re-transmission of collection is given data acquisition control computer, data acquisition control computer record by resistance strain gauge
After the change of data in whole process, balance to be adsorbed, the pressure value P on the 3rd pressure gauge on now adsorption-desorption tank is recorded4,
Coal sample gas adsorption amount is calculated according to below equation
Q in formulaInhaleFor coal sample gas adsorption amount（STP）, unit is cm3；Z is Gas Compression Factor；R is gas constant；T is mark condition
Temperature；
（4-4）, the temperature closed in the 6th stop valve and the 8th stop valve, regulation sealed thermostat case be adsorption experiment temperature, connect
The desorption gas in the second pressure-reducing valve of opening, the tenth stop valve, the 11st stop valve and the 12nd stop valve, adsorption-desorption tank
Enter water tank by the 6th tracheae and after refrigerator and drier cooling and drying, start coal sample desorption, desorption gas passes through the
Six tracheaes enter the water tank for filling with water and go out the hydraulic pressure in water tank, and the water of extrusion is drained on electronic balance through outlet pipe, every
The registration of 1-3min recorded electronic balances, and now adsorption experiment temperature, atmospheric pressure are used record for correcting, electricity to be desorbed into
Registration 0.2 ㎎ per minute on sub- balance stops when changing；
（4-5）, regulation change equilibrium still in pressure value, repeat step（4-1）-（4-4）Tested, finally given etc. stable
The strain data of coal sample during adsorption-desorption amount and adsorption-desorption of the appearance coal sample under gas with various pressure.
Step（5）The middle method for carrying out methane alternating temperature level pressure coal sample adsorption-desorption deformation test, comprises the following steps：
（5-1）, regulation sealed thermostat case temperature be T1, this is adsorption experiment temperature, passes through step（1-1）To equilibrium still and suction
Attached solution cucurbitula carries out vacuumize process；
（5-2）, open methane gas tank and the first pressure-reducing valve, booster pump, the 4th stop valve and pressure regulator valve on the 4th tracheae, warp
Cause that the 4th endotracheal pressure of methane is constant after pressure regulation valve regulation, and the 4th endotracheal pressure of methane value is in 1MPa ~ 2MPa
It is interior, the 5th stop valve and the 6th stop valve are opened afterwards so that methane enters in equilibrium still, when the pressure stability in equilibrium still
Afterwards, methane gas tank, the first pressure-reducing valve, booster pump, the 4th stop valve, pressure regulator valve, the 5th stop valve and the 6th stop valve are closed, is stopped
Operation is only inflated, the value P shown on now equilibrium still on the 4th pressure gauge is then recorded5；
（5-3）, open resistance strain gauge and carry out zeroing work, then open the 6th stop valve and the 8th stop valve, equilibrium still
Begin through the 5th tracheae and be passed through methane gas into absorption parsing tank, high temperature resistant resistance foil gauge gathered data is simultaneously transferred to electricity
Deformeter is hindered, the data re-transmission of collection is given data acquisition control computer, data acquisition control computer record by resistance strain gauge
The change of data in whole process, the 5th endotracheal methane gas pressure of holding is P6, when in adsorption-desorption tank in 1h
When pressure change is no more than 0.02MPa, it is believed that reach adsorption equilibrium, the pressure value on the 4th pressure gauge on now equilibrium still is recorded
P7, coal sample gas adsorption amount is calculated according to below equation
Q in formulaInhaleFor coal sample gas adsorption amount（STP）, unit is cm3；Z is Gas Compression Factor；R is gas constant；T is mark condition
Temperature；
（5-4）, the temperature closed in the 6th stop valve and the 8th stop valve, regulating tank be adsorption experiment temperature, then open
Desorption gas in the second pressure-reducing valve, the tenth stop valve and the 11st stop valve on 6th tracheae, adsorption-desorption tank passes through
Six tracheaes simultaneously enter water tank after refrigerator and drier cooling and drying, start coal sample desorption, desorption gas passes through the 6th tracheae
Go out into the water tank for filling with water and by the hydraulic pressure in water tank, the water of extrusion is drained on electronic balance through outlet pipe, every 1-3min
The registration of recorded electronic balance, and now adsorption experiment temperature, atmospheric pressure are used record for correcting, electronic balance to be desorbed into
On registration 0.2 ㎎ per minute changes when stop；
（5-5）, constantly lifting change sealed thermostat case temperature untill 150 DEG C, repeat step（5-1）-（5-4）Carry out real
Test, finally give the strain data of coal sample coal sample during adsorption-desorption amount and adsorption-desorption under alternating temperature level pressure.
Step（6）The middle method for carrying out methane alternating temperature constant volume coal sample adsorption-desorption deformation test, comprises the following steps：
（6-1）, regulation sealed thermostat case temperature be T2, this is adsorption experiment temperature, repeat step（4）, solution cucurbitula to be adsorbed
Interior coal sample reaches adsorption equilibrium, reads the 4th manometric registration P on now equilibrium still8, close the 8th stop valve；
（6-2）, regulation sealed thermostat case temperature be T3, repeat step（4）, in temperature changing process, keep adsorption-desorption
Gas gross in tank does not change, and the coal sample in solution cucurbitula to be adsorbed reaches adsorption equilibrium, reads on now equilibrium still the
Four manometric registration P9, close the 8th stop valve；
（6-3）, calculate coal sample adsorbance
In formula, QInhaleFor coal sample gas adsorption amount（STP）, unit is cm3；Z is Gas Compression Factor；R is gas constant；T2、T3For
The temperature of first time adsorption equilibrium and second of adsorption equilibrium, unit for DEG C；
（6-4）, the temperature closed in the 6th stop valve and the 8th stop valve, regulating tank be adsorption experiment temperature, then open
Desorption gas in the second pressure-reducing valve, the tenth stop valve and the 11st stop valve on 6th tracheae, adsorption-desorption tank passes through
Six tracheaes simultaneously enter water tank after refrigerator and drier cooling and drying, start coal sample desorption, desorption gas passes through the 6th tracheae
Go out into the water tank for filling with water and by the hydraulic pressure in water tank, the water of extrusion is drained on electronic balance through outlet pipe, every 1-3min
The registration of recorded electronic balance, and now adsorption experiment temperature, atmospheric pressure are used record for correcting, electronic balance to be desorbed into
On registration 0.2 ㎎ per minute changes when stop；
（6-5）, constantly lifting change sealed thermostat case temperature untill 150 DEG C, repeat step（6-1）-（6-4）Carry out real
Test, finally give the strain data of coal sample during adsorption-desorption amount and adsorption-desorption of the coal sample under alternating temperature constant volume.
Above-mentioned technical proposal is used, the invention has the advantages that：Present invention experiment passes through pumped vacuum systems, gas injection
Linking and cooperation between system, adsorption-desorption deformation test system, gas metering system, pumped vacuum systems are pipeline and each
Air discharge in individual equipment；Adsorption-desorption deformation test system is mainly placement equilibrium still and adsorption-desorption tank, keeps sealing
Device keeps a certain steady temperature in insulating box（0~150℃）；Gas injection system is the methane gas of artificial injection certain pressure
It is stored in equilibrium still, then makes coal sample abundant to the methane gas of injection specified pressure in adsorption-desorption tank by equilibrium still
After absorption, start gradually to be lifted to set high temperature resistant foil gauge in temperature, coal sample, the deformeter outside extraction wire connection, so as to grind
Study carefully under HTHP deformation rule during coal body adsorption-desorption；Metering system is from the outflow of adsorption-desorption deformation test system
Gas is after supercooling, and the methane of gas outlet utilizes drainage after drying by constant temperature water tank, is expelled directly out isometric
Water, can utilize data line transfer to data acquisition control computer in addition, the pressure gauge reading of record gas feed and outlet,
Temperature sensor registration, the pressure gauge registration of equilibrium still, the registration of the registration of high Accuracy Electronic Balance, and then calculate coal body suction
Attached desorption gas volume；The data collected by high temperature resistant foil gauge in coal sample and external resistance strain gauge, summary and induction
Go out coal body deformation rule during adsorption-desorption at high temperature under high pressure；Can be the design and optimization and coal bed gas of gas drainage under suction
Exploitation provide theoretical reference.
In summary, the present invention be easy to that operation, workload are small, measure quick and precisely, experimental performance it is high, be coal bed gas extraction
During adsorption-desorption cubic deformation provide experiment and theoretical research.
Brief description of the drawings
Fig. 1 is the structural representation for being applied to coal body adsorption-desorption deformation test device under HTHP in the present invention；
Fig. 2 is the structural representation of adsorption-desorption tank.
Embodiment
As depicted in figs. 1 and 2, one kind of the invention is applied to coal body adsorption-desorption deformation test device under HTHP,
Including pumped vacuum systems I, gas injection system II, adsorption-desorption deformation test system III and gas metering system IV；
Pumped vacuum systems I includes vavuum pump 1 and vacuum tank 2, and the air inlet of vavuum pump 1 passes through the first tracheae 3 and vacuum tank 2
Gas outlet connection, the first tracheae 3 is provided with the first stop valve 4, and the air inlet of vacuum tank 2 is connected with the second tracheae 5, second
The stop valve 7 of balloon 6 and second is sequentially provided with along airflow direction on tracheae 5, balloon 6 is connected by the 3rd tracheae 8 with the second tracheae 5
Connect, the 3rd tracheae 8 is provided with the 3rd stop valve 9, vacuum tank 2 is provided with vacuum meter 10；
Gas injection system II includes methane gas tank 11 and high pressure helium gas tank 12, and methane gas tank 11 passes through the 4th tracheae 13 and adsorption-desorption
On the inlet end connection of deformation test system III, the 4th tracheae 13 high pressure gauge 14, the first pressure-reducing valve are sequentially provided with along airflow direction
15th, low-pressure meter 16, booster pump 17, the 4th stop valve 18, check valve 19, pressure regulator valve 20, the 5th stop valve 21 and the 6th stop valve
22, high pressure helium gas tank 12 is connected by high-voltage tube 23 with the 4th tracheae 13, and the junction of high-voltage tube 23 and the 4th tracheae 13 is located at
Between 4th stop valve 18 and check valve 19, high-voltage tube 23 is provided with the 7th stop valve 24；
Gas metering system IV includes data acquisition control computer 25, electronic balance 26, constant temperature water pot 27 and water tank 28, water tank 28
In constant temperature water pot 27, constant temperature water pot 27 is connected with water injection pipe 29, and water injection pipe 29 is provided with the 9th stop valve 30, water tank 28
Provided with the temperature sensor 32 of first pressure table 31 and first, water tank 28 passes through the 6th tracheae 33 and adsorption-desorption deformation test system
III outlet side connection, on the 6th tracheae 33 along airflow direction be sequentially provided with second pressure table 34, the second pressure-reducing valve 35, the tenth section
Only valve 36, refrigerator 37, the stop valve 39 of drier 38 and the 11st, the bottom of water tank 28 is connected with outlet pipe 40, outlet pipe 40
The 12nd stop valve 41 is provided with, the delivery port of outlet pipe 40 is located at the top of electronic balance 26；Data acquisition control computer 25
It is connected respectively with first pressure table 31, second pressure table 34, the first temperature sensor 32 and electronic balance 26 by data wire.
Adsorption-desorption deformation test system III includes setting in resistance strain gauge 42 and sealed thermostat case 43, sealed thermostat case 43
There are adsorption-desorption tank 44 and equilibrium still 45, adsorption-desorption tank 44 includes tank body 46 and cover 47, and cover 47 passes through fastening bolt 48
The top of tank body 46 is connected to, the junction between cover 47 and tank body 46 is provided with refractory seals ring 49, cover 47 is provided with
3rd pressure gauge 50 and second temperature sensor 51, tank body 46 are provided with four mounting holes, each mounting hole and are equipped with one
Hollow bolt, is provided with high-temperature resistant seal ring 52, four hollow bolts are respectively air inlet connecting between hollow bolt and mounting hole inwall
First 53, high temperature resistant resistance foil gauge 57 is provided with air outlet adapter 54, terminal 55 and standby joint 56, tank body 46；Resistance should
Become instrument 42 to be connected with high temperature resistant resistance foil gauge 57 by the data wire being located in terminal 55；Methane gas tank 11 passes through
Four tracheaes 13 are connected with equilibrium still 45, and equilibrium still 45 is provided with the 4th pressure gauge 58 and three-temperature sensor 59；Adsorption-desorption
The inlet suction port 53 of tank 44 is connected by the 5th tracheae 60 with the 4th tracheae 13, the junction of the 5th tracheae 60 and the 4th tracheae 13
Between the 5th stop valve 21 and the 6th stop valve 22；5th tracheae 60 is provided with the 8th stop valve 61；Adsorption-desorption tank 44
Air outlet adapter 54 be connected by the 6th tracheae 33 with gas metering system IV；3rd pressure gauge 50, the 4th pressure gauge 58, second
Temperature sensor 51, three-temperature sensor 59 and resistance strain gauge 42 pass through data wire and data acquisition control computer 25 respectively
Connection.
A kind of experimental method for being applied to coal body adsorption-desorption deformation test under HTHP, comprises the following steps：
（1）, survey calculation equilibrium still 45 volume VKettleWith the volume V of adsorption-desorption tank 44Tank；
（2）, install coal sample：The raw coal taken out from coal seam is fabricated to the coal of cuboid or cylinder according to the volume of tank body 46
Sample, and coal sample is then positioned in tank body 46 by high temperature resistant resistance foil gauge 57 installed in the surface of coal sample, should by high temperature resistant
The data wire of change piece is connected after being drawn at terminal 55 with resistance strain gauge 42；
（3）, free volume V in measurement adsorption-desorption tank 44From；
（4）, carry out methane isothermal constant volume coal sample adsorption-desorption deformation test；
（5）, carry out methane alternating temperature level pressure coal sample adsorption-desorption deformation test；
（6）, carry out methane alternating temperature constant volume coal sample adsorption-desorption deformation test；
Step（1）The method of middle measurement equilibrium still 45 and the volume of adsorption-desorption tank 44, comprises the following steps：
（1-1）, close sealed thermostat case 43 and all valves, the 6th stop valve 22, the 8th stop valve are then opened successively
61st, the first stop valve 4 and the second stop valve 7, start vavuum pump 1 and equilibrium still 45 and adsorption-desorption tank 44 be evacuated to very
Reciprocal of duty cycle value maintains the 6th stop valve 22 of closing, the 8th stop valve 61, the first stop valve 4 and second section after 30min to below 4Pa
Only valve 7；
（1-2）, the helium opened in high pressure helium gas tank 12 and the 7th stop valve 24, high pressure helium gas tank 12 enters through high-voltage tube 23
4th tracheae 13, adjusts after causing the helium pressure in the 4th tracheae 13 to be 0.5MPa through pressure regulator valve 20, opens the 5th stop valve
21 and the 6th stop valve 22, the helium in the 4th tracheae 13 is poured in equilibrium still 45, and the temperature and pressure in ready to balance kettle 45 is steady
After fixed, the value P shown on the 4th pressure gauge 58 of record1 kettle；It is then switched off the 6th stop valve 22 and opens the 8th stop valve 61, the
Helium in four tracheaes 13 is poured in adsorption-desorption tank 44, after temperature and pressure is stable in solution cucurbitula 44 to be adsorbed, record the 3rd
The value P shown on pressure gauge 501 tank, close high pressure helium gas tank 12, the 7th stop valve 24, the 5th stop valve 21 and the 8th stop valve
61, stop inflation operation；
（1-3）, open the 6th stop valve 22 and the 8th stop valve 61, ready to balance kettle 45 and pressure stability in adsorption-desorption tank 44
Afterwards, the value P shown on the 3rd pressure gauge 50 of record1 is flat, open in the 3rd stop valve 9, equilibrium still 45 and adsorption-desorption tank 44
Helium enters in balloon 6 through the second tracheae 5 and the 3rd tracheae 8, and the 3rd stop valve 9 is closed when 6 not reflation of balloon；
（1-4）, open the cover 47 of adsorption-desorption tank 44, be put into V known to volumeMarkSolid standard component, it is again that cover 47 is close
Envelope is arranged on tank body 46, repeat step（1-1）-（1-3）, and recording step（1-2）In the value that shows on the 4th pressure gauge 58
P2 kettles, the value P that shows on the 3rd pressure gauge 502 tanksAnd step（1-3）The value P shown after middle balance on the 3rd pressure gauge 502 is flat；
（1-5）, according to below equation group calculated equilibrium kettle 45VKettleAnd adsorption-desorption tank 44VTankVolume, i.e.,：
Repeat step（1-1）-（1-5）Five times, ask for VKettleAnd VTankAverage value.
Step（3）Free volume V in middle measurement adsorption-desorption tank 44FromMethod, comprise the following steps：
（3-1）, pass through step（1-1）Vacuumize process is carried out to equilibrium still 45 and adsorption-desorption tank 44；
（3-2）, the helium opened in high pressure helium gas tank 12 and the 7th stop valve 24, high pressure helium gas tank 12 enters through high-voltage tube 23
4th tracheae 13, adjusts after causing the helium pressure in the 4th tracheae 13 to be 0.5MPa through pressure regulator valve 20, opens the 5th stop valve
21 and the 6th stop valve 22, the helium in the 4th tracheae 13 is poured in equilibrium still 45, and the temperature and pressure in ready to balance kettle 45 is steady
After fixed, the value P shown on the 4th pressure gauge 58 of record1；It is then switched off high pressure helium gas tank 12, the 7th stop valve 24 and the 5th cut-off
Valve 21, the helium opened in the 8th stop valve 61, equilibrium still 45 is poured in adsorption-desorption tank 44 through the 5th tracheae 60, solution to be adsorbed
After temperature and pressure is stable in cucurbitula 44, the value P shown on the 3rd pressure gauge 50 of record2；
（3-3）, the free volume in adsorption-desorption tank 44 calculated according to Boyle's law：
V in formulaFromFor the free volume in adsorption-desorption tank 44, unit cm3；P1For the initial pressure of helium in equilibrium still 45；P2For
The residual compression of helium in equilibrium still 45；VKettleFor the volume of equilibrium still 45, unit cm3。
Step（4）The middle method for carrying out methane isothermal constant volume coal sample adsorption-desorption deformation test, comprises the following steps：
（4-1）, pass through step（1-1）Vacuumize process is carried out to equilibrium still 45 and adsorption-desorption tank 44；
（4-2）, open methane gas tank 11 and the first pressure-reducing valve 15, booster pump 17, the 4th stop valve 18 on the 4th tracheae 13
With pressure regulator valve 20, make it that the pressure of methane in the 4th tracheae 13 is constant after being adjusted through pressure regulator valve 20, and the first in the 4th tracheae 13
Alkane pressure value opens the 5th stop valve 21 and the 6th stop valve 22 afterwards in 1.0MPa ~ 16MPa so that methane enters balance
In kettle 45, after pressure stability in equilibrium still 45, close methane gas tank 11, the first pressure-reducing valve 15, booster pump the 17, the 4th and end
Valve 18, pressure regulator valve 20, the 5th stop valve 21 and the 6th stop valve 22, stop inflation operation, then record on now equilibrium still 45
The value P shown on 4th pressure gauge 583；
（4-3）, open and resistance strain gauge 42 and carry out zeroing work, then open the 6th stop valve 22 and the 8th stop valve 61, put down
Weighing apparatus kettle 45 begins through the 5th tracheae 60 and is passed through methane gas, the gathered data of high temperature resistant resistance foil gauge 57 into absorption parsing tank
And resistance strain gauge 42 is transferred to, resistance strain gauge 42 is by the data re-transmission of collection to data acquisition control computer 25, data
The change of data in the record whole process of acquisition control computer 25, after balance to be adsorbed, record is now the on adsorption-desorption tank 44
Pressure value P on three pressure gauges 504, coal sample gas adsorption amount is calculated according to below equation
Q in formulaInhaleFor coal sample gas adsorption amount（STP）, unit is cm3；Z is Gas Compression Factor；R is gas constant；T is mark condition
Temperature；
（4-4）, the temperature closed in the 6th stop valve 22 and the 8th stop valve 61, regulation sealed thermostat case 43 be adsorption experiment temperature
Degree, then opens the second pressure-reducing valve 35, the tenth stop valve 36, the 11st stop valve 39 and the 12nd stop valve 41, adsorption-desorption
Desorption gas in tank 44 enters water tank 28 by the 6th tracheae 33 and after refrigerator 37 and the cooling and drying of drier 38, starts
Coal sample is desorbed, and desorption gas is entered by the 6th tracheae 33 to be filled with the water tank 28 of water and go out the hydraulic pressure in water tank 28, extrusion
Water is drained on electronic balance 26 through outlet pipe 40, every the registration of 1-3min recorded electronics balance 26, and it is real to record now absorption
Temperature, atmospheric pressure are tested so that correction is used, is stopped when desorbing into 0.2 ㎎ per minute of the registration on electronic balance 26 and changing；
（4-5）, regulation change equilibrium still 45 in pressure value, repeat step（4-1）-（4-4）Tested, finally given etc. steady
The strain data of coal sample during adsorption-desorption amount and adsorption-desorption of the constant volume coal sample under gas with various pressure.
Step（5）The middle method for carrying out methane alternating temperature level pressure coal sample adsorption-desorption deformation test, comprises the following steps：
（5-1）, regulation sealed thermostat case 43 temperature be T1, this is adsorption experiment temperature, passes through step（1-1）To equilibrium still 45
Vacuumize process is carried out with adsorption-desorption tank 44；
（5-2）, open methane gas tank 11 and the first pressure-reducing valve 15, booster pump 17, the 4th stop valve 18 on the 4th tracheae 13
With pressure regulator valve 20, make it that the pressure of methane in the 4th tracheae 13 is constant after being adjusted through pressure regulator valve 20, and the first in the 4th tracheae 13
Alkane pressure value opens the 5th stop valve 21 and the 6th stop valve 22 afterwards in 1MPa ~ 2MPa so that methane enters equilibrium still 45
It is interior, after pressure stability in equilibrium still 45, close methane gas tank 11, the first pressure-reducing valve 15, booster pump 17, the 4th stop valve
18th, pressure regulator valve 20, the 5th stop valve 21 and the 6th stop valve 22, stop inflation operation, then record on now equilibrium still 45 the
The value P shown on four pressure gauges 585；
（5-3）, open and resistance strain gauge 42 and carry out zeroing work, then open the 6th stop valve 22 and the 8th stop valve 61,
Equilibrium still 45 begins through the 5th tracheae 60 and methane gas, the collection number of high temperature resistant resistance foil gauge 57 is passed through into absorption parsing tank
According to and be transferred to resistance strain gauge 42, resistance strain gauge 42 is by the data re-transmission of collection to data acquisition control computer 25, number
The change of data in whole process is recorded according to acquisition control computer 25, it is P to keep the methane gas pressure in the 5th tracheae 606,
In 1h when the pressure change in adsorption-desorption tank 44 is no more than 0.02MPa, it is believed that reach adsorption equilibrium, record is now balanced
Pressure value P on kettle 45 on the 4th pressure gauge 587, coal sample gas adsorption amount is calculated according to below equation
Q in formulaInhaleFor coal sample gas adsorption amount（STP）, unit is cm3；Z is Gas Compression Factor；R is gas constant；T is mark condition
Temperature；
（5-4）, the temperature closed in the 6th stop valve 22 and the 8th stop valve 61, regulating tank 28 be adsorption experiment temperature, connect
In the second pressure-reducing valve 35, the tenth stop valve 36 and the 11st stop valve 39 opened on the 6th tracheae 33, adsorption-desorption tank 44
Desorption gas enter water tank 28 by the 6th tracheae 33 and after refrigerator 37 and the cooling and drying of drier 38, start coal sample solution
Inhale, desorption gas is entered by the 6th tracheae 33 to be filled with the water tank 28 of water and go out the hydraulic pressure in water tank 28, and the water of extrusion is through going out
Water pipe 40 is drained on electronic balance 26, the registration on 1-3min recorded electronics balance 26, and records now adsorption experiment temperature
Degree, atmospheric pressure use for correction, stop when desorbing into 0.2 ㎎ per minute of the registration on electronic balance 26 and changing；
（5-5）, constantly lifting change the temperature of sealed thermostat case 43 untill 150 DEG C, repeat step（5-1）-（5-4）Carry out
Experiment, finally gives the strain data of coal sample coal sample during adsorption-desorption amount and adsorption-desorption under alternating temperature level pressure.
Step（6）The middle method for carrying out methane alternating temperature constant volume coal sample adsorption-desorption deformation test, comprises the following steps：
（6-1）, regulation sealed thermostat case 43 temperature be T2, this is adsorption experiment temperature, repeat step（4）, desorption to be adsorbed
Coal sample in tank 44 reaches adsorption equilibrium, reads the registration P of the 4th pressure gauge 58 on now equilibrium still 458, close the 8th and end
Valve 61；
（6-2）, regulation sealed thermostat case 43 temperature be T3, repeat step（4）, in temperature changing process, keep absorption solution
Gas gross in cucurbitula 44 does not change, and the coal sample in solution cucurbitula 44 to be adsorbed reaches adsorption equilibrium, and reading is now balanced
The registration P of 4th pressure gauge 58 on kettle 459, close the 8th stop valve 61；
（6-3）, calculate coal sample adsorbance
In formula, QInhaleFor coal sample gas adsorption amount（STP）, unit is cm3；Z is Gas Compression Factor；R is gas constant；T2、T3For
The temperature of first time adsorption equilibrium and second of adsorption equilibrium, unit for DEG C；
（6-4）, the temperature closed in the 6th stop valve 22 and the 8th stop valve 61, regulating tank 28 be adsorption experiment temperature, connect
In the second pressure-reducing valve 35, the tenth stop valve 36 and the 11st stop valve 39 opened on the 6th tracheae 33, adsorption-desorption tank 44
Desorption gas enter water tank 28 by the 6th tracheae 33 and after refrigerator 37 and the cooling and drying of drier 38, start coal sample solution
Inhale, desorption gas is entered by the 6th tracheae 33 to be filled with the water tank 28 of water and go out the hydraulic pressure in water tank 28, and the water of extrusion is through going out
Water pipe 40 is drained on electronic balance 26, every the registration of 1-3min recorded electronics balance 26, and record now adsorption experiment temperature,
Atmospheric pressure uses for correction, stops when desorbing into 0.2 ㎎ per minute of the registration on electronic balance 26 and changing；
（6-5）, constantly lifting change the temperature of sealed thermostat case 43 untill 150 DEG C, repeat step（6-1）-（6-4）Carry out
Experiment, finally gives the strain data of coal sample during adsorption-desorption amount and adsorption-desorption of the coal sample under alternating temperature constant volume.
The present embodiment not makees any formal limitation to shape, material, structure of the present invention etc., every according to this hair
Any simple modification, equivalent variations and modification that bright technical spirit is made to above example, belong to the technology of the present invention side
The protection domain of case.
Claims (6)
1. a kind of experimental method for being applied to coal body adsorption-desorption deformation test under HTHP, it is characterised in that：The experiment side
Method, which is used, is applied to coal body adsorption-desorption deformation test device progress under HTHP, it is adaptable to coal body absorption solution under HTHP
Inhaling deformation test device includes pumped vacuum systems, gas injection system, adsorption-desorption deformation test system and gas metering system；
Pumped vacuum systems includes vavuum pump and vacuum tank, and the air inlet of vavuum pump passes through the first tracheae and the outlet of vacuum tank
Mouth connection, the first tracheae is provided with the first stop valve, and the air inlet of vacuum tank is connected with the second tracheae, the second tracheae along gas
Stream direction is sequentially provided with balloon and the second stop valve, and balloon is connected by the 3rd tracheae with the second tracheae, and the 3rd tracheae is provided with
3rd stop valve, vacuum tank is provided with vacuum meter；
Gas injection system includes methane gas tank and high pressure helium gas tank, and methane gas tank passes through the 4th tracheae and adsorption-desorption deformation test system
The inlet end connection of system, is sequentially provided with high pressure gauge, the first pressure-reducing valve, low-pressure meter, booster pump, the on the 4th tracheae along airflow direction
Four stop valves, check valve, pressure regulator valve, the 5th stop valve and the 6th stop valve, high pressure helium gas tank pass through high-voltage tube and the 4th tracheae
The junction of connection, high-voltage tube and the 4th tracheae is located between the 4th stop valve and check valve, and high-voltage tube is provided with the 7th cut-off
Valve；
Gas metering system includes data acquisition control computer, electronic balance, constant temperature water pot and water tank, and water tank is located at constant temperature water pot
Interior, constant temperature water pot is connected with water injection pipe, and water injection pipe is provided with the 9th stop valve, and water tank is provided with first pressure table and the first temperature
Sensor, water tank is connected by the 6th tracheae with the outlet side of adsorption-desorption deformation test system, along air-flow side on the 6th tracheae
To being sequentially provided with second pressure table, the second pressure-reducing valve, the tenth stop valve, refrigerator, drier and the 11st stop valve, water tank
Bottom is connected with outlet pipe, and outlet pipe is provided with the 12nd stop valve, and the delivery port of outlet pipe is located at the top of electronic balance；Number
According to acquisition control computer by data wire respectively with first pressure table, second pressure table, the first temperature sensor and electronic balance
Connection；
Adsorption-desorption deformation test system includes being provided with adsorption-desorption tank in resistance strain gauge and sealed thermostat case, sealed thermostat case
And equilibrium still, adsorption-desorption tank includes tank body and cover, and cover is connected to the top of tank body, cover and tank body by fastening bolt
Between junction be provided with refractory seals ring, cover is provided with the 3rd pressure gauge and second temperature sensor, and tank body is provided with
A hollow bolt is equipped with four mounting holes, each mounting hole, high temperature resistant is provided between hollow bolt and mounting hole inwall
Sealing ring, four hollow bolts are respectively that resistance to height is provided with inlet suction port, air outlet adapter, terminal and standby joint, tank body
Warm resistance strain gage；Resistance strain gauge is connected by the data wire being located in terminal with high temperature resistant resistance foil gauge；First
Alkane gas tank is connected by the 4th tracheae with equilibrium still, and equilibrium still is provided with the 4th pressure gauge and three-temperature sensor；Absorption solution
The inlet suction port of cucurbitula is connected by the 5th tracheae with the 4th tracheae, and the junction of the 5th tracheae and the 4th tracheae is located at the 5th section
Only between valve and the 6th stop valve；5th tracheae is provided with the 8th stop valve；The air outlet adapter of adsorption-desorption tank passes through the 6th gas
Pipe is connected with gas metering system；3rd pressure gauge, the 4th pressure gauge, second temperature sensor, three-temperature sensor and electricity
Resistance deformeter is connected by data wire with data acquisition control computer respectively；
Suitable for the experimental method of coal body adsorption-desorption deformation test under HTHP, comprise the following steps：
（1）, survey calculation equilibrium still volume VKettleWith the volume V of adsorption-desorption tankTank；
（2）, install coal sample：The raw coal taken out from coal seam is fabricated to the coal sample of cuboid or cylinder according to the volume of tank body,
And high temperature resistant resistance foil gauge is arranged on to the surface of coal sample, then coal sample is positioned in tank body, by high temperature resistant foil gauge
Data wire is connected after being drawn at terminal with resistance strain gauge；
（3）, measurement adsorption-desorption tank in free volume VFrom；
（4）, carry out methane isothermal constant volume coal sample adsorption-desorption deformation test；
（5）, carry out methane alternating temperature level pressure coal sample adsorption-desorption deformation test；
（6）, carry out methane alternating temperature constant volume coal sample adsorption-desorption deformation test.
2. a kind of experimental method for being applied to coal body adsorption-desorption deformation test under HTHP according to claim 1,
It is characterized in that：Step（1）The method of middle measurement equilibrium still and adsorption-desorption tank volume, comprises the following steps：
（1-1）, close sealed thermostat case and all valves, the 6th stop valve, the 8th stop valve, first are then opened successively
Stop valve and the second stop valve, start vavuum pump equilibrium still and adsorption-desorption tank be evacuated to vacuum degree to 4Pa with
Under, maintain to close the 6th stop valve, the 8th stop valve, the first stop valve and the second stop valve after 30min；
（1-2）, the helium opened in high pressure helium gas tank and the 7th stop valve, high pressure helium gas tank enter the 4th gas through high-voltage tube
Pipe, after causing the 4th endotracheal helium pressure to be 0.5MPa through pressure regulation valve regulation, opens the 5th stop valve and the 6th stop valve,
4th endotracheal helium is poured in equilibrium still, after the temperature and pressure in ready to balance kettle is stable, is shown on the 4th pressure gauge of record
The value P shown1 kettle；It is then switched off the 6th stop valve and opens the 8th stop valve, the 4th endotracheal helium pours adsorption-desorption tank
It is interior, after temperature and pressure is stable in solution cucurbitula to be adsorbed, the value P shown on the 3rd pressure gauge of record1 tank, closing high pressure helium gas tank,
7th stop valve, the 5th stop valve and the 8th stop valve, stop inflation operation；
（1-3）, open the 6th stop valve and the 8th stop valve, after ready to balance kettle and adsorption-desorption pressure inside the tank are stable, record the
The value P shown on three pressure gauges1 is flat, open the 3rd stop valve, the helium in equilibrium still and adsorption-desorption tank through the second tracheae and
3rd tracheae enters in balloon, and the 3rd stop valve is closed when balloon not reflation；
（1-4）, open adsorption-desorption tank cover, be put into V known to volumeMarkSolid standard component, sealing of tank cover is installed again
On tank body, repeat step（1-1）-（1-3）, and recording step（1-2）In the value P that shows on the 4th pressure gauge2 kettles, the 3rd pressure
The value P shown on power table2 tanksAnd step（1-3）The value P shown after middle balance on the 3rd pressure gauge2 is flat；
（1-5）, according to below equation group calculated equilibrium kettle VKettleAnd adsorption-desorption tank VTankVolume, i.e.,：
Repeat step（1-1）-（1-5）Five times, ask for VKettleAnd VTankAverage value.
3. a kind of experimental method for being applied to coal body adsorption-desorption deformation test under HTHP according to claim 2,
It is characterized in that：Step（3）Free volume V in middle measurement adsorption-desorption tankFromMethod, comprise the following steps：
（3-1）, pass through step（1-1）Vacuumize process is carried out to equilibrium still and adsorption-desorption tank；
（3-2）, the helium opened in high pressure helium gas tank and the 7th stop valve, high pressure helium gas tank enter the 4th gas through high-voltage tube
Pipe, after causing the 4th endotracheal helium pressure to be 0.5MPa through pressure regulation valve regulation, opens the 5th stop valve and the 6th stop valve,
4th endotracheal helium is poured in equilibrium still, after the temperature and pressure in ready to balance kettle is stable, is shown on the 4th pressure gauge of record
The value P shown1；High pressure helium gas tank, the 7th stop valve and the 5th stop valve are then switched off, is opened in the 8th stop valve, equilibrium still
Helium is poured in adsorption-desorption tank through the 5th tracheae, after temperature and pressure is stable in solution cucurbitula to be adsorbed, records the 3rd pressure gauge
The value P of upper display2；
（3-3）, according to Boyle's law calculate adsorption-desorption tank in free volume：
V in formulaFromFor the free volume in adsorption-desorption tank, unit cm3；P1For the initial pressure of helium in equilibrium still；P2For balance
The residual compression of helium in kettle；VKettleFor the volume of equilibrium still, unit cm3。
4. a kind of experimental method for being applied to coal body adsorption-desorption deformation test under HTHP according to claim 3,
It is characterized in that：Step（4）The middle method for carrying out methane isothermal constant volume coal sample adsorption-desorption deformation test, comprises the following steps：
（4-1）, pass through step（1-1）Vacuumize process is carried out to equilibrium still and adsorption-desorption tank；
（4-2）, open methane gas tank and the first pressure-reducing valve, booster pump, the 4th stop valve and pressure regulator valve on the 4th tracheae, warp
After pressure regulation valve regulation cause the 4th endotracheal pressure of methane it is constant, and the 4th endotracheal pressure of methane value 1.0MPa ~
In 16MPa, the 5th stop valve and the 6th stop valve are opened afterwards so that methane enters in equilibrium still, when the pressure in equilibrium still
After stable, methane gas tank, the first pressure-reducing valve, booster pump, the 4th stop valve, pressure regulator valve, the 5th stop valve and the 6th cut-off are closed
Valve, stops inflation operation, then records the value P shown on now equilibrium still on the 4th pressure gauge3；
（4-3）, open resistance strain gauge and carry out zeroing work, then open the 6th stop valve and the 8th stop valve, equilibrium still
Begin through the 5th tracheae and be passed through methane gas into absorption parsing tank, high temperature resistant resistance foil gauge gathered data is simultaneously transferred to electricity
Deformeter is hindered, the data re-transmission of collection is given data acquisition control computer, data acquisition control computer record by resistance strain gauge
After the change of data in whole process, balance to be adsorbed, the pressure value P on the 3rd pressure gauge on now adsorption-desorption tank is recorded4,
Coal sample gas adsorption amount is calculated according to below equation
Q in formulaInhaleFor coal sample gas adsorption amount（STP）, unit is cm3；Z is Gas Compression Factor；R is gas constant；T is mark condition
Temperature；
（4-4）, the temperature closed in the 6th stop valve and the 8th stop valve, regulation sealed thermostat case be adsorption experiment temperature, connect
The desorption gas in the second pressure-reducing valve of opening, the tenth stop valve, the 11st stop valve and the 12nd stop valve, adsorption-desorption tank
Enter water tank by the 6th tracheae and after refrigerator and drier cooling and drying, start coal sample desorption, desorption gas passes through the
Six tracheaes enter the water tank for filling with water and go out the hydraulic pressure in water tank, and the water of extrusion is drained on electronic balance through outlet pipe, every
The registration of 1-3min recorded electronic balances, and now adsorption experiment temperature, atmospheric pressure are used record for correcting, electricity to be desorbed into
Registration 0.2 ㎎ per minute on sub- balance stops when changing；
（4-5）, regulation change equilibrium still in pressure value, repeat step（4-1）-（4-4）Tested, finally given etc. stable
The strain data of coal sample during adsorption-desorption amount and adsorption-desorption of the appearance coal sample under gas with various pressure.
5. a kind of experimental method for being applied to coal body adsorption-desorption deformation test under HTHP according to claim 4,
It is characterized in that：Step（5）The middle method for carrying out methane alternating temperature level pressure coal sample adsorption-desorption deformation test, comprises the following steps：
（5-1）, regulation sealed thermostat case temperature be T1, this is adsorption experiment temperature, passes through step（1-1）To equilibrium still and suction
Attached solution cucurbitula carries out vacuumize process；
（5-2）, open methane gas tank and the first pressure-reducing valve, booster pump, the 4th stop valve and pressure regulator valve on the 4th tracheae, warp
Cause that the 4th endotracheal pressure of methane is constant after pressure regulation valve regulation, and the 4th endotracheal pressure of methane value is in 1MPa ~ 2MPa
It is interior, the 5th stop valve and the 6th stop valve are opened afterwards so that methane enters in equilibrium still, when the pressure stability in equilibrium still
Afterwards, methane gas tank, the first pressure-reducing valve, booster pump, the 4th stop valve, pressure regulator valve, the 5th stop valve and the 6th stop valve are closed, is stopped
Operation is only inflated, the value P shown on now equilibrium still on the 4th pressure gauge is then recorded5；
（5-3）, open resistance strain gauge and carry out zeroing work, then open the 6th stop valve and the 8th stop valve, equilibrium still
Begin through the 5th tracheae and be passed through methane gas into absorption parsing tank, high temperature resistant resistance foil gauge gathered data is simultaneously transferred to electricity
Deformeter is hindered, the data re-transmission of collection is given data acquisition control computer, data acquisition control computer record by resistance strain gauge
The change of data in whole process, the 5th endotracheal methane gas pressure of holding is P6, when in adsorption-desorption tank in 1h
When pressure change is no more than 0.02MPa, it is believed that reach adsorption equilibrium, the pressure value on the 4th pressure gauge on now equilibrium still is recorded
P7, coal sample gas adsorption amount is calculated according to below equation
Q in formulaInhaleFor coal sample gas adsorption amount（STP）, unit is cm3；Z is Gas Compression Factor；R is gas constant；T is mark condition
Temperature；
（5-4）, the temperature closed in the 6th stop valve and the 8th stop valve, regulating tank be adsorption experiment temperature, then open
Desorption gas in the second pressure-reducing valve, the tenth stop valve and the 11st stop valve on 6th tracheae, adsorption-desorption tank passes through
Six tracheaes simultaneously enter water tank after refrigerator and drier cooling and drying, start coal sample desorption, desorption gas passes through the 6th tracheae
Go out into the water tank for filling with water and by the hydraulic pressure in water tank, the water of extrusion is drained on electronic balance through outlet pipe, every 1-3min
The registration of recorded electronic balance, and now adsorption experiment temperature, atmospheric pressure are used record for correcting, electronic balance to be desorbed into
On registration 0.2 ㎎ per minute changes when stop；
（5-5）, constantly lifting change sealed thermostat case temperature untill 150 DEG C, repeat step（5-1）-（5-4）Carry out real
Test, finally give the strain data of coal sample coal sample during adsorption-desorption amount and adsorption-desorption under alternating temperature level pressure.
6. a kind of experimental method for being applied to coal body adsorption-desorption deformation test under HTHP according to claim 5,
It is characterized in that：Step（6）The middle method for carrying out methane alternating temperature constant volume coal sample adsorption-desorption deformation test, comprises the following steps：
（6-1）, regulation sealed thermostat case temperature be T2, this is adsorption experiment temperature, repeat step（4）, it is to be adsorbed to solve in cucurbitula
Coal sample reach adsorption equilibrium, read the 4th manometric registration P on now equilibrium still8, close the 8th stop valve；
（6-2）, regulation sealed thermostat case temperature be T3, repeat step（4）, in temperature changing process, keep adsorption-desorption tank
Interior gas gross does not change, and the coal sample in solution cucurbitula to be adsorbed reaches adsorption equilibrium, reads the 4th on now equilibrium still
Manometric registration P9, close the 8th stop valve；
（6-3）, calculate coal sample adsorbance
In formula, QInhaleFor coal sample gas adsorption amount（STP）, unit is cm3；Z is Gas Compression Factor；R is gas constant；T2、T3For
The temperature of first time adsorption equilibrium and second of adsorption equilibrium, unit for DEG C；
（6-4）, the temperature closed in the 6th stop valve and the 8th stop valve, regulating tank be adsorption experiment temperature, then open
Desorption gas in the second pressure-reducing valve, the tenth stop valve and the 11st stop valve on 6th tracheae, adsorption-desorption tank passes through
Six tracheaes simultaneously enter water tank after refrigerator and drier cooling and drying, start coal sample desorption, desorption gas passes through the 6th tracheae
Go out into the water tank for filling with water and by the hydraulic pressure in water tank, the water of extrusion is drained on electronic balance through outlet pipe, every 1-3min
The registration of recorded electronic balance, and now adsorption experiment temperature, atmospheric pressure are used record for correcting, electronic balance to be desorbed into
On registration 0.2 ㎎ per minute changes when stop；
（6-5）, constantly lifting change sealed thermostat case temperature untill 150 DEG C, repeat step（6-1）-（6-4）Carry out real
Test, finally give the strain data of coal sample during adsorption-desorption amount and adsorption-desorption of the coal sample under alternating temperature constant volume.
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