CN107272082B - The analogy method of water content in a kind of quantitative detection coal seam - Google Patents
The analogy method of water content in a kind of quantitative detection coal seam Download PDFInfo
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Abstract
The invention discloses a kind of analogy methods of water content in quantitative detection coal seam, the following steps are included: making aqueous coal seam physical model first, model is cube structure, and water space is equipped at the inside center of model, and water space passes through plastic tube and external connection；Uniformly distributed current electrode and measuring electrode around water space；By, for the voltage value at electrometric determination adjacent two, successively obtaining the voltage value on each survey line to electrode；After the completion of data acquisition, line is disconnected；Using steel pipe socket to coal sample center drill core, institute's coring sample is ground into drying weighing calculates its water content and obtain water distribution situation；After carrying out calculation processing by tester, the water corresponding relationship of resistivity and corresponding position is established, realizes that quantification prediction coal seam includes regimen condition.The present invention can quantitative determine the case where water distribution in coal, intuitively provide measurement result；Including the measurement of regimen condition to the coal seam in front of top plate and bottom plate in actual production, tunnel has directive significance.
Description
Technical field
The present invention relates to a kind of analogy methods of water content in quantitative detection coal seam, belong to coal seam water-bearing survey technology neck
Domain.
Background technique
As mining depth is constantly deepened, complicated hydrogeological conditions, coal production receives serious water damage and threatens.
Coal mine flood accident causes a large amount of property loss and casualties, and direct economy caused by mine water disaster accident damages according to statistics
It loses, it is the first to occupy all kinds of accidents.It makes trouble more than 500 from starting in 2000, more than 2800 people are wrecked, direct economic loss more than 350 hundred million
Member, single death toll are only second to gas accident and occupy second.In addition, coal mine flood accident different from gas and roof accident
Secondary disaster easily occurs, causes a variety of environmental problems.In shaft production, how accurate comprehensively advanced prediction coal seam is included
Regimen condition is of great significance to prevention mine water disaster accident, and the aqueous situation in coal seam all affects coal mine all the time
Safety and production.Therefore, find out that the aqueous situation in down-hole coal bed is Safety of Coal Mine Production urgent problem to be solved.
Based on electrical property difference of the mine direct current method between media various in the earth's crust, established by arrangement current electrode
Play stable artificial electric field, measure the changing rule of the electric field, seek the apparent resistivity of rock stratum, draw apparent resistivity curve to
Achieve the purpose that understanding coal seam includes regimen condition.But the research of forefathers focuses mostly in using aqueous model in this method detection of coal seam
It encloses, but can not achieve the quantification prediction of aqueous situation always.
Summary of the invention
The present invention is intended to provide in a kind of quantitative detection coal seam water content analogy method, by around coal sample water storage tank
It arranges survey line electrode, using DC electrical method, is analyzed in conjunction with the water of coal sample drill core, realize aqueous situation in quantitative forecast coal
Purpose.
The present invention provides a kind of analogy methods of water content in quantitative detection coal seam, comprising the following steps:
(1) aqueous coal seam physical model is made, model is cube structure, and it is empty that water storage is equipped at the inside center of model
Between, water space passes through plastic tube and external connection；
(2) uniformly distributed current electrode and measuring electrode around water space；
Lower section, top and the side of the water space are respectively equipped with survey line, and power supply electricity is evenly distributed on survey line
Pole and measuring electrode.
(3) coal sample made is placed on the indoor one piece of insulation plank of experiment；
(4) the water space water filling by reserved plastic tube into coal sample；
(5) it after filling water, opens tester power supply power supply and switchs to electrode power supply；
(6) acquire data: the voltage value at measurement adjacent two successively obtains the voltage value on each survey line；
(7) after the completion of data acquisition, line is disconnected；Using steel pipe socket at drill bit at the center of coal sample side to coal
Sample center drill core takes eight groups of drill cores altogether；
(8) institute's coring sample is ground into drying weighing and calculates its water content, coal sample side is drawn according to the water content of each drill core
The irrigation water distribution map in region；This group of drill core is derived from coal sample side, and aqueous situation is mainly influenced by the spreading factor of water；
(9) repeat step (7) (8) above coal sample, lower section sample and draw coal sample top, lower part irrigation water distribution map；Coal
Sample top drill core water content is few, and lower part drill core water content is more, is mainly affected by gravity, and the water in the water storage tank of middle part permeates downwards
It is more；
(10) gained measurement data is arranged, after carrying out calculation processing by tester, obtains the resistance in coal sample at each measuring point
Rate situation；Establish the water corresponding relationship of resistivity and corresponding position；Quantification prediction coal seam includes regimen condition.
The above method specifically includes the following steps:
(1) square mould is made, successively compacting is laid with the fine coal of 0.2-0.25mm partial size；It stays and sets in coal sample centre
Square water space, liner 0.5mm plastic tab stay the aperture for setting five φ 2mm on each thin slice；A pre-buried φ 2mm
Plastic tube, connection water space open at one end, one end are exposed at outside coal sample, and plastic tube pipe shaft enters inside coal sample；Away from storage
A survey line CX-2 is laid immediately below the bottom midpoint of hydrospace at 20mm, electrode at one is laid every 4mm on survey line, with same
Mode lays survey line CX-1 right above the water space at 20mm, in water space left side central portion away from laying water space 20mm at
Survey line CX-3；12 electrodes are set altogether on every survey line, wherein being current electrode close to 4 of water space, being located at power supply electricity
8 on the outside of pole are measuring electrode, each electrode independence line；
(2) coal sample made is placed on the indoor one piece of insulation plank of experiment；By the power supply electricity on CX-1 survey line
Pole G1-1The 50mA direct current anode interface being connected on tester, cathode interface be connected to away from coal sample 2m it is remote one at ground wire connect
Head；By measuring electrode C1-1、C1-2The voltage measurement interface of connecting test instrument；
The tester is Agilent U1733C LCR tester.
(3) water space by reserved plastic tube into coal sample injects water；
(4) it after filling water, opens Agilent U1733C LCR tester power supply power supply and switchs to G1-1Electrode power supply, is adopted
Collect C1-1、C1-2The voltage value of electrode at two；
(5) tester power supply power supply switch is closed, G is disconnected1-1Line, measuring electrode is constant, by current electrode G1-2Access
50mA direct current anode interface on tester opens tester power supply power supply switch, acquires C at this time1-1、C1-2Voltage value；
It repeats the above steps, then obtains G1-3、G1-4C when as current electrode1-1、C1-2Voltage value；
(6) tester power switch is closed, C is disconnected1-1、C1-2Line, mobile measuring electrode to C1-2、C1-3Repeat step
(4) (5) obtain current electrode G1-1、G1-2、 G1-3、G1-4C when individually powering1-2、C1-3The voltage value at place；
(7) voltage value on step (4) ~ (6) acquisition survey line CX-1 at remaining measuring electrode is repeated；
(8) voltage value at the measuring electrode on step (4) ~ (7) acquisition survey line CX-2, CX-3 is repeated；
(9) after the completion of data acquisition, line is disconnected；Using the steel pipe socket of φ 10mm at drill bit coal sample side just
It is primary every 10mm coring to coal sample center drill core at middle M point, eight groups of drill cores are taken altogether；
(10) institute's coring sample is ground into drying weighing and calculates its water content, coal sample side is drawn according to the water content of each drill core
The irrigation water distribution map in region；This group of drill core is derived from coal sample side, and aqueous situation is mainly influenced by the spreading factor of water；
(11) step (8) (9) are repeated to sample in coal sample top center point, bottom centre's point and draw coal sample top, lower part
Irrigation water distribution map；Coal sample top drill core water content is less, and lower part drill core water content is more, is mainly affected by gravity, middle part storage
Water in water body permeates downwards more；
(12) gained measurement data is arranged, by from after tape program progress calculation processing, obtaining each in coal sample inside tester
Resistivity situation at measuring point；
(13) the water corresponding relationship of resistivity and corresponding position is established；Quantification prediction coal seam includes regimen condition.
Beneficial effects of the present invention:
The present invention can quantitative determine water point in coal by establishing in resistivity and coal seam the corresponding relationship of water content everywhere
The case where cloth, intuitively provides measurement result；And centered on water space, determine respectively water space top, side, under
The water distribution situation of side, including the measurement of regimen condition to the coal seam in front of top plate and bottom plate in actual production, tunnel has guidance meaning
Justice.
Detailed description of the invention
Fig. 1 is the structural schematic diagram for the physical simulating device that quantitative detection coal seam of the present invention includes regimen condition；
Fig. 2 is the structural schematic diagram of simulation experiment system；
Fig. 3 is DC electrical method test schematic；
Fig. 4 is water content distribution figure；
Fig. 5 is resistivity distribution map；
Fig. 6 is resistivity quantitative detection figure.
Specific embodiment
The present invention is described in further detail with specific embodiment with reference to the accompanying drawing, but the present invention is not limited to
These embodiments.
As shown in Figure 1 and Figure 2, in a kind of quantitative detection coal seam moisture content analogy method, include the following steps:
(1) the square mould of each 200mm of length, width and height is made of plank；Successively compacting is laid with 0.2-0.25mm partial size
Fine coal；Stay the square water space for setting each 40mm of length, width and height in coal sample centre, liner 0.5mm plastic tab, each
The aperture for setting five φ 2mm is stayed on thin slice；Pre-buried φ 2mm plastic straw, connection water space open at one end, one end is exposed at
Outside coal sample, pipe shaft is entered inside coal sample；A survey line CX-2 is laid at 20mm immediately below away from water space bottom midpoint,
The long 44mm of survey line lays electrode at one every 4mm, sets 12 electrodes altogether wherein close to 4 of water space as current electrode, position
8 on the outside of current electrode are measuring electrode, each electrode independence line；The 20mm right above water space in the same way
Place lays survey line CX-1, in water space left side central portion away from survey line CX-3 is laid at water space 20mm, as shown in Figure 1；
Fig. 1 is test specimen structure chart, and grey parts are reserved water space in the middle part of test specimen, latent in coal seam for simulating
Cavity ponding, survey line CX-1, CX-2, CX-3 can realize upper and lower to coal seam internal water accumulation and side resistivity monitoring.
(2) coal sample made is placed on the indoor one piece of insulation plank of experiment；By the power supply electricity on CX-1 survey line
Pole G1-1The 50mA direct current anode interface being connected on Agilent U1733C LCR tester, cathode interface are connected to away from coal
Sample 2m it is remote one at earth connection point；By measuring electrode C1-1、C1-2Connect the voltage measurement of Agilent U1733C LCR tester
Interface；Integral experiment system arrangement is as shown in Figure 2.Fig. 2 is implementation environment and the signal of integral device line of experiment.The survey of experiment
Principle is tried as shown in figure 3, electric current is passed through current electrode G1-1After a round equipotential surface, potential change can be formed around it
Electrode C can be measured1-1、C1-2It captures.
(3) water space by reserved tubule into coal sample injects the water of 64mL；
(4) it after filling water, opens Agilent U1733C LCR tester power supply power supply and switchs to G1-1Electrode power supply, is adopted
Collect C1-1、C1-2The voltage value of electrode at two；
(5) Agilent U1733C LCR tester power supply power supply switch is closed, G is disconnected1-1Line, measuring electrode is constant,
By current electrode G1-2The 50mA direct current anode interface on tester is accessed, opens tester power supply power supply switch, acquisition is at this time
C1-1、C1-2Voltage value；It repeats the above steps, then obtains G1-3、G1-4C when as current electrode1-1、C1-2Voltage value；
(6) tester power switch is closed, C is disconnected1-1、C1-2Line, mobile measuring electrode to C1-2、C1-3Repeat step
(4) (5) obtain current electrode G1-1、G1-2、 G1-3、G1-4C when individually powering1-2、C1-3The voltage value at place；
(7) voltage value on step (4) (5) (6) acquisition survey line CX-1 at remaining measuring electrode is repeated；
(8) voltage value at the measuring electrode on step (4) (5) (6) (7) acquisition survey line CX-2, CX-3 is repeated；
Its resistivity can be analyzed after the completion of data acquisition, Fig. 5 is resulting resistivity distribution map after analysis, can
Intuitively to show that resistivity is lower in the middle part of test specimen, meet the feature that latent ponding is located in the middle part of test specimen.
(9) after the completion of data acquisition, line is disconnected；Using the steel pipe socket of φ 10mm at drill bit coal sample side just
It is primary every 10mm coring to coal sample center drill core at middle M point, eight groups of drill cores are taken altogether；
(10) institute's coring sample is ground into drying weighing and calculates its water content, coal sample side is drawn according to the water content of each drill core
The irrigation water distribution map in region, such as Fig. 4；This group of drill core is derived from coal sample side, and aqueous situation is mainly influenced by the spreading factor of water；
Fig. 4 is water content distribution figure, and according to test, water content is higher in the coal seam that water accumulation part is lain concealed at middle part, edge
Locate lower.
(11) step (8) (9) are repeated and samples and draw coal sample top, lower part water minute in coal sample top N point, bottom S point
Butut；Coal sample top drill core water content is less, and lower part drill core water content is more, is mainly affected by gravity, in the water storage tank of middle part
Water permeate downwards it is more；
(12) gained measurement data is arranged, by from after tape program progress calculation processing, obtaining each in coal sample inside tester
Resistivity situation at measuring point, as shown in Figure 5；It can intuitively show that resistivity is lower in the middle part of test specimen, meet latent ponding position
Feature in the middle part of test specimen；
(13) the water corresponding relationship of resistivity and corresponding position is established；Quantification prediction coal seam includes regimen condition.
Fig. 6 is that resistivity Quantitative Monitoring figure is obtained in conjunction with the resulting change of moisture content of Fig. 4 and the resulting change in resistance of Fig. 5
The quantitative relationship of resistivity and coal seam water content is obtained, realizes that quantification predicts coal seam water content.
Claims (5)
1. the analogy method of water content in a kind of quantitative detection coal seam, it is characterised in that: the following steps are included:
(1) aqueous coal seam physical model is made, model is cube structure, water space is equipped at the inside center of model,
Water space passes through plastic tube and external connection；
(2) uniformly distributed current electrode and measuring electrode around water space；
(3) coal sample made is placed in laboratory；
(4) the water space water filling by reserved plastic tube into coal sample；
(5) after filling water, tester power supply power supply is opened immediately and is switched to electrode power supply；
(6) acquire data: the voltage value at measurement adjacent two successively obtains the voltage value on each survey line；
(7) after the completion of data acquisition, line is disconnected；Using steel pipe socket at drill bit at the center of coal sample side into coal sample
Drill core is entreated, takes eight groups of drill cores altogether；
(8) institute's coring sample is ground into drying weighing and calculates its water content, coal sample side region is drawn according to the water content of each drill core
Irrigation water distribution map；This group of drill core is derived from coal sample side, and aqueous situation is mainly influenced by the spreading factor of water；
(9) repeat step (7) (8) above coal sample, lower section sample and draw coal sample top, lower part irrigation water distribution map；In coal sample
Portion's drill core water content is few, and lower part drill core water content is more, is mainly affected by gravity, and the water in the water storage tank of middle part permeates downwards more
It is more；
(10) gained measurement data is arranged, after carrying out calculation processing by tester, obtains the resistivity feelings in coal sample at each measuring point
Condition；Establish the water corresponding relationship of resistivity and corresponding position；Quantification prediction coal seam includes regimen condition.
2. the analogy method of water content in quantitative detection coal seam according to claim 1, it is characterised in that: the water storage is empty
Between lower section, top and side be respectively equipped with survey line, current electrode and measuring electrode are evenly distributed on survey line.
3. the analogy method of water content in quantitative detection coal seam according to claim 1, it is characterised in that: specifically include with
Lower step:
(1) square mould is made, successively compacting is laid with the fine coal of 0.2-0.25mm partial size；It is stayed in coal sample centre and sets pros
Body water space, liner 0.5mm plastic tab stay the aperture for setting five φ 2mm on each thin slice；Pre-buried φ 2mm plastics
Pipe, connection water space open at one end, one end are exposed at outside coal sample, and plastic tube pipe shaft enters inside coal sample；Away from water storage sky
Between immediately below bottom midpoint the place 20mm lay a survey line CX-2, on survey line at 4mm laying one electrode, in the same way
Survey line CX-1 is laid right above the water space at 20mm, in water space left side central portion away from laying survey line water space 20mm at
CX-3；
(2) coal sample made is placed on the indoor one piece of insulation plank of experiment；By the current electrode G on CX-1 survey line1-1
The 50mA direct current anode interface being connected on tester, cathode interface be connected to away from coal sample 2m it is remote one at earth connection point；It will
Measuring electrode C1-1、C1-2The voltage measurement interface of connecting test instrument；
(3) water space by reserved plastic tube into coal sample injects water；
(4) it after filling water, opens Agilent U1733C LCR tester power supply power supply and switchs to G1-1Electrode power supply, acquisition
C1-1、C1-2The voltage value of electrode at two；
(5) tester power supply power supply switch is closed, G is disconnected1-1Line, measuring electrode is constant, by current electrode G1-2Access test
50mA direct current anode interface on instrument opens tester power supply power supply switch, acquires C at this time1-1、C1-2Voltage value；It repeats
Above-mentioned steps, then obtain G1-3、G1-4C when as current electrode1-1、C1-2Voltage value；
(6) tester power switch is closed, C is disconnected1-1、C1-2Line, mobile measuring electrode to C1-2、C1-3It repeats step (4)
(5), current electrode G is obtained1-1、G1-2、 G1-3、G1-4C when individually powering1-2、C1-3The voltage value at place；
(7) voltage value on step (4) ~ (6) acquisition survey line CX-1 at remaining measuring electrode is repeated；
(8) voltage value at the measuring electrode on step (4) ~ (7) acquisition survey line CX-2, CX-3 is repeated；
(9) after the completion of data acquisition, line is disconnected；M is hit exactly in coal sample side at drill bit using the steel pipe socket of φ 10mm
It is primary every 10mm coring to coal sample center drill core at point, eight groups of drill cores are taken altogether；
(10) institute's coring sample is ground into drying weighing and calculates its water content, coal sample side region is drawn according to the water content of each drill core
Irrigation water distribution map；
(11) step (8) (9) are repeated and samples and draw coal sample top, lower part water in coal sample top center point, bottom centre's point
Distribution map；
(12) gained measurement data is arranged, by from after tape program progress calculation processing, obtaining each measuring point in coal sample inside tester
The resistivity situation at place；
(13) the water corresponding relationship of resistivity and corresponding position is established；Quantification prediction coal seam includes regimen condition.
4. the analogy method of water content in quantitative detection coal seam according to claim 3, it is characterised in that: in every survey line
On set 12 electrodes altogether, wherein be close to 4 of water space current electrode, 8 on the outside of current electrode be measurement electricity
Pole, each electrode independence line.
5. the analogy method of water content in quantitative detection coal seam according to claim 3, it is characterised in that: the square
The size of mold are as follows: length is respectively 200mm；The size of the square water space are as follows: length is respectively
40mm。
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| CN109828308B (en) * | 2019-03-01 | 2020-11-06 | 山东大学 | Geophysical geoelectrical model test device and method |
| CN112485829B (en) * | 2020-10-15 | 2023-05-09 | 中铁四局集团第五工程有限公司 | Method for calculating dynamic water content by resistivity method |
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| CN105652329A (en) * | 2016-02-04 | 2016-06-08 | 中国科学院地质与地球物理研究所 | Method and device for evaluating apparent water inflow of coal seam roof |
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| CN106097133A (en) * | 2016-07-11 | 2016-11-09 | 中国石油天然气集团公司 | A kind of coal seam water content and aquifer yield Forecasting Methodology |
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| WO2015084951A1 (en) * | 2013-12-04 | 2015-06-11 | Cornell University | Ceramic-polymer hybrid nanostructures, methods for producing and applications thereof |
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| CN103995295A (en) * | 2014-06-11 | 2014-08-20 | 中煤科工集团西安研究院有限公司 | Direct current electric method ground hole detection method and device |
| CN105719027A (en) * | 2016-02-03 | 2016-06-29 | 山东科技大学 | Quantitative prediction method of clastic rock aquifer water yield property of working seam roof and floor |
| CN105652329A (en) * | 2016-02-04 | 2016-06-08 | 中国科学院地质与地球物理研究所 | Method and device for evaluating apparent water inflow of coal seam roof |
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