CN108119143A - A kind of vertical shaft working surface cement soluble glass paste combines grouting method with chemical grout double-round curtain - Google Patents
A kind of vertical shaft working surface cement soluble glass paste combines grouting method with chemical grout double-round curtain Download PDFInfo
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- CN108119143A CN108119143A CN201711383860.8A CN201711383860A CN108119143A CN 108119143 A CN108119143 A CN 108119143A CN 201711383860 A CN201711383860 A CN 201711383860A CN 108119143 A CN108119143 A CN 108119143A
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- 239000011440 grout Substances 0.000 title claims abstract description 70
- 238000000034 method Methods 0.000 title claims abstract description 32
- 239000000126 substance Substances 0.000 title claims abstract description 21
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 title claims abstract description 18
- 239000004568 cement Substances 0.000 title claims description 25
- 238000007569 slipcasting Methods 0.000 claims abstract description 55
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 51
- 239000002002 slurry Substances 0.000 claims abstract description 43
- 230000000694 effects Effects 0.000 claims abstract description 14
- 238000002347 injection Methods 0.000 claims abstract description 14
- 239000007924 injection Substances 0.000 claims abstract description 14
- 235000019353 potassium silicate Nutrition 0.000 claims abstract description 6
- 239000004567 concrete Substances 0.000 claims description 69
- 238000005553 drilling Methods 0.000 claims description 35
- 239000007788 liquid Substances 0.000 claims description 28
- 238000010276 construction Methods 0.000 claims description 25
- 238000012360 testing method Methods 0.000 claims description 20
- 229910000831 Steel Inorganic materials 0.000 claims description 13
- 239000010959 steel Substances 0.000 claims description 13
- 239000003795 chemical substances by application Substances 0.000 claims description 10
- 239000004115 Sodium Silicate Substances 0.000 claims description 9
- 239000002253 acid Substances 0.000 claims description 9
- 238000009434 installation Methods 0.000 claims description 9
- 229910052911 sodium silicate Inorganic materials 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 8
- 230000002706 hydrostatic effect Effects 0.000 claims description 7
- 238000000151 deposition Methods 0.000 claims description 6
- 238000005266 casting Methods 0.000 claims description 5
- 239000004570 mortar (masonry) Substances 0.000 claims description 5
- 230000008569 process Effects 0.000 claims description 5
- 238000004080 punching Methods 0.000 claims description 5
- 238000013461 design Methods 0.000 claims description 4
- 239000004744 fabric Substances 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- 238000007667 floating Methods 0.000 claims description 3
- 238000012797 qualification Methods 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 230000011218 segmentation Effects 0.000 claims description 3
- 230000009977 dual effect Effects 0.000 abstract description 3
- 239000011435 rock Substances 0.000 description 5
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 238000007689 inspection Methods 0.000 description 4
- 229920001131 Pulp (paper) Polymers 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 3
- 239000011083 cement mortar Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229920002472 Starch Polymers 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- GZCGUPFRVQAUEE-SLPGGIOYSA-N aldehydo-D-glucose Chemical class OC[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)C=O GZCGUPFRVQAUEE-SLPGGIOYSA-N 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 230000010339 dilation Effects 0.000 description 2
- 235000013399 edible fruits Nutrition 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000007480 spreading Effects 0.000 description 2
- 238000003892 spreading Methods 0.000 description 2
- 235000019698 starch Nutrition 0.000 description 2
- 239000008107 starch Substances 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000032798 delamination Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 238000001727 in vivo Methods 0.000 description 1
- 238000001990 intravenous administration Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 210000004911 serous fluid Anatomy 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 235000013599 spices Nutrition 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D5/00—Lining shafts; Linings therefor
- E21D5/04—Lining shafts; Linings therefor with brick, concrete, stone, or similar building materials
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
Combine grouting method with chemical grout double-round curtain the invention discloses a kind of vertical shaft working surface cement-silicate biliquid, this method drills along inside and outside two circle of shaft face arrangement, two circle bore angles are different, the cementing waterglass dual slurry in inner ring injected hole, chemical grout is noted in the injected hole of outer ring, vertebra shape curtain is formed outside the borehole wall using two circle bored groutings and blocks water-bearing layer crack, this method can block more aqueous cracks, grouting amount is little, slip casting effect is good, is a kind of safe and reliable, good vertical shaft working surface slurry injection technique of slip casting effect.
Description
Technical field
The present invention relates to a kind of ore deposits to build technical field of construction, more particularly to a kind of vertical shaft working surface cement soluble glass paste
Combine grouting method with chemical grout double-round curtain.
Background technology
Shaft construction flood is to influence construction speed, the main factor of quality, in shaft construction according to different lithology, no
Same water yield, different rock-layers fractured zones use different modes of harnessing the river.Bury relatively deep, hydrostatic pressure in deep packsand water-bearing layer
Greatly, crack is tiny, is easily blocked by sediment deposition, and grouting serous fluid dilation angle is small, and particularly iron ore deep packsand water-bearing layer contains
Ferriferous oxide is heavier, and the ferriferous oxide in crack easily departs from Si oxide and forms one layer of rust mud in fracture surface, in high pressure cement
The lower delamination of slurries impact easily blocks crack, and mortar depositing construction difficulty increases.It is noted using single cement soluble glass paste individual pen hole
The crack scope very little of closure is starched, slip casting terminates after recovering driving, influenced by sharp pounding is blown out, and makes former blocked in crack
Possessed the cement of certain setting strength and cement-sodium silicate adhesive bond be quaked loose it is broken, it is easy to by water-bearing layer high pressure water flushing
Go out crack, cause a large amount of water bursts of working face again, jeopardize construction safety；And it uses and uses single chemical grouting in working face
When, cost can be far above the cost of cement or cement-water glass double grouting, and underground water can be polluted, for depth
How portion packsand water-bearing layer finds a grouting method that can effectively block the underground water in front of vertical shaft working surface, is shaft building
The engineering major issue to be solved.
The content of the invention
In order to solve the above technical problem, the present invention provides a kind of vertical shaft working surface cement soluble glass paste and chemical pulps
Liquid double-round curtain combines grouting method, had reached not only effectively closure deep packsand water-bearing layer crack but also had reduced invalid grouting amount
Purpose, solves that slip casting difficulty in packsand water-bearing layer is big, the technical barrier of slip casting effect difference.
The technical scheme is that：
A kind of vertical shaft working surface cement soluble glass paste combines grouting method with chemical grout double-round curtain, and feature exists
In to vertical shaft working surface arrangement double-round injected hole, inner ring hole cementing-waterglass biliquid slurry, the chemical slurry of cycle hole note.
Wherein, the inclination angle of the injected hole 9 of inner ring hole is less than the inclination angle of the injected hole 18 of cycle hole；
Along the equidistant installation inner ring orifice tube 12 of vertical circumferencial direction；
This method can block more aqueous cracks, and grouting amount is little, and slip casting effect is good, efficiently solves deep packsand
Water-bearing layer crack is tiny, and grout spreading range is small, the big construction difficult problem of grouting pressure.
It is as follows：
(1) working face goes out the clear bottom of cash
The spoil of vertical shaft working surface 1 is removed into shaft bottom, and floating cash is cleaned out, will be risen on punching block to from working face 5~
6m positions.
(2) rubble drainage layer is constructed
It carries out rubble drainage layer 2 on vertical shaft working surface 1 to construct, pre-buried two of the portion center steel pipe 8 that draws water, takes out in the wellbore
Water center steel pipe 8 is embedded into rubble drainage layer 2, each built-in immersible pump 13 in two center steel pipes 8, then, in rubble
Drainage layer two layers of 2 upper berth colour bar cloth 3 and one layer of malthoid 4, concrete grout cover 6 and rubble drainage layer 1 are separated.
(3) concrete grout cover is constructed
Concrete grout cover 6 is carried out on malthoid 4 to construct, and the thickness of concrete grout cover 6 is determined by calculation, according to note
Pitch of holes is starched, determines the hole count of inner ring injected hole 9, determines position and the length of inner ring orifice tube 12, slip casting section height is determined, determines
The inclination angle of inner ring injected hole 9 and outer ring injected hole 18, and ensure that the inclination angle of inner ring hole injected hole 9 is less than outer ring injected hole 18
Inclination angle, along the equidistant installation inner ring orifice tube 12 of vertical circumferencial direction, casting concrete grout cover 6.
(4) concrete grout cover pressure testing
After concrete grout cover 6 is poured into a mould 7 days, first pressure testing and secondary pressure testing are carried out to concrete grout cover 6.Secondary pressure testing
After qualification, concrete grout cover 6 reaches requirement.
(4) drilling cramp and fixed drilling machine are installed
Matched somebody with somebody using down-the-hole drill 14Drill bit andDrilling rod bores injected hole, matches somebody with somebodyDrill bit punches, and installation is outer
Orifice tube 5 is enclosed, down-the-hole drill 14 is fixed using drilling cramp 16, and sliding rail frame 15 is mounted on drilling cramp 16, and sliding rail frame 15 can the side of adjusting
To, and 15 down-the-hole drill of sliding rail frame, 14 direction-adjustable and angle, drilling cramp 16 are fixed on using earth anchor 17 on concrete grout cover 6.
(5) injecting paste material is determined
Inner ring hole cementing-waterglass biliquid slurry, the chemical slurry of cycle hole note, the cement-sodium silicate double liquid
It matches and is：Cement common 525#, waterglass concentration 40Be, modulus 2.8~3.1；It is described chemistry slurry for Lauxite with
The mixture of acid curing agent, the formula of modified urea-formaldehyde resin is according to presetting period 3-5min of slurries or so, final setting time
15-20min or so, gel time are controlled primarily by Lauxite (A liquid) with the volume ratio of acid curing agent (B liquid), it is necessary to adopt
With grouting pump (A according to a certain percentage:B=3:1~4：1) slip casting is carried out.It can be according to slurries in injecting cement paste during slip casting
Diffusion situation adjust A in time:B liquid proportionals are to control the gel time of slurries.
(6) Internal and external cycle mortar depositing construction
Grouting pressure (taking 2 times of hydrostatic pressures) is determined, according to 6 pressure testing of concrete grout cover as a result, determining cement-water glass
Glass dual slurry and Lauxite (A liquid) are designed and noted from the matched proportion density of acid curing agent (B liquid) and the single hole of different injecting paste materials
Enter amount, the sequence of construction entirely to drill is：It first carries out inner ring hole drilling and visits water, if found have water to gush out, then inner ring hole drilling is simultaneously
Using cement-sodium silicate double liquid slip casting, then to cycle hole drilling and chemical grouting, if slurries injection rate has reached design
Injection rate, but grouting pressure is not reaching to when designing final grouting pressure, and slip casting terminates, sealing of hole.Entire slip casting process is using under segmentation
Column is pressed into slip casting.
(8) slip casting effect is analyzed
To grouting pressure, flow, concentration of slurry in each hole section slip casting, the variation of water absorption is analyzed, judges to note
Whether slurry construction is qualified.Behind inspection hole end hole, if any water burst, measurement hydraulic pressure, water are converted into big well yield, see big well kick
Whether water is less than 2m3/ h, if the big well yield that inspection hole is computed out is respectively less than 2m3/ h, it is possible to think the slurry in crack
Liquid filling is full, closely knit, can terminate slip casting.It finally carries out wellbore centre and visits water hole drilling, carry out spy water, be used to check slip casting effect
Fruit.
The advantageous effect that the present invention generates the prior art is：
The present invention uses cement mortar slip casting difficulty big for packsand water-bearing layer, the situation of slip casting effect difference, it is proposed that
A kind of vertical shaft working surface cement-sodium silicate double liquid liquid and chemical pulp mixing grouting method, to vertical shaft working surface arrangement double-round note
Starch hole, inner ring hole cementing-waterglass biliquid slurry, the chemical slurry of cycle hole note.This method can block more aqueous cracks,
Grouting amount is little, and slip casting effect is good, is a kind of safe and reliable, good vertical shaft working surface slurry injection technique of slip casting effect.
Description of the drawings
Fig. 1 is rubble drainage layer and concrete grout cover construction schematic diagram；
Fig. 2 is drilling cramp schematic diagram；
Fig. 3 is vertical shaft working surface cement soluble glass paste and chemical grout double-round curtain-grouting schematic diagram；
Fig. 4 is vertical aperture detail drawing；
In figure：1st, vertical shaft working surface, 2, rubble drainage layer, 3, two layers of colour bar cloth, 4, one layers of malthoid layer, 5, outer ring aperture
Pipe, 6, concrete grout cover, 7, outer ring aperture, 8, center steel pipe, 9, inner ring injected hole, 10, inner ring aperture, 11, resin anchor,
12nd, inner ring orifice tube, 13, immersible pump, 14, down-the-hole drill, 15, sliding rail frame, 16, drilling cramp, 17, earth anchor, 18, outer ring injected hole,
19th, high-pressure ball valve.
Specific embodiment
(the skip bucket main shaft working face cement soluble glass paste of certain southern metallic ore in the following with reference to the drawings and specific embodiments
It is embodiment with chemical grout double-round curtain-grouting) to the present invention, a kind of vertical shaft working surface cement soluble glass paste and chemical pulp
Liquid double-round Curtain Grouting Method, makees the further explanation of concrete measure and implementation process.
The skip bucket main shaft packsand water-bearing layer pre grouting from the working face of certain southern metallic ore, skip bucket main shaft net diameter 6m, supporting
Thickness 300mm, full depth 832m.In well depth, 606.1~679.5m sections are packsand water-bearing layer.
(1) working face goes out the clear bottom of cash
The spoil of vertical shaft working surface 1 is removed into shaft bottom, and floating cash is cleaned out, will be risen on punching block to from working face 5~
6m positions.
(2) rubble drainage layer is constructed
The ore deposit skip bucket main shaft is has water burst working face, and since geologic information is not allowed, working face has opened partially aqueous layer, and
Water yield reaches 100m3/h.In order to ensure concrete grout cover smoothly pours, progress rubble drainage layer 2 is applied on vertical shaft working surface 1
Work, 2 thickness of rubble drainage layer are 2.0m.Detailed process is：Pre-buried two of portion in the wellboreDraw water center steel pipe 8,
The center steel pipe 8 that draws water is embedded into rubble drainage layer 2, each built-in 100m in two center steel pipes 8313 row of/h immersible pumps
Water, a draining, one it is spare.Then, two layers of colour bar cloth 3 and one layer of malthoid 4 are spread from bottom to up in rubble drainage layer 2.
(3) concrete grout cover is constructed
Concrete grout cover 6 is carried out on malthoid 4 to construct, and the thickness of pad concrete grout cover 6 is determined by calculation, according to
Slip casting pitch of holes determines the hole count of inner ring injected hole 9, determines position and the length of inner ring orifice tube 12, determines slip casting section height, really
Determine the inclination angle of inner ring injected hole 9 and outer ring injected hole 18, and ensure that the inclination angle of inner ring hole injected hole 9 is less than outer ring injected hole 18
Inclination angle, along the equidistant installation inner ring orifice tube 12 of vertical circumferencial direction, casting concrete grout cover 6.
1) concrete grout cover thickness determines
Bn- grout cover thickness (m)；
P0- final grouting pressure takes 2 times (MPa) of hydrostatic pressure；
[σ]-concrete allows compression strength (MPa), concrete set time 7 days, C40 concrete sevens day limit pressure resistance
The 70%-90% for standard value, i.e. 28~36MPa are spent, consider 2 times of safety coefficients and is got the small value, [σ] value is 14MPa；
R is mineshaft diameter (m), takes 6.6m；
It is computed grout cover thickness BnFor 4.2m.
2) injected hole hole count and inner ring orifice tube determine
For drilling is enable to look for more cracks as far as possible, and crack grouting is abundant between making hole, and white area of not leaving blank, each hole exists
Circle is fully handed over to form curtain in range of grouting, injected hole arrangement is preferably close and double-round is arranged, hole count calculates as follows：
Hole count N is calculated as follows：
N=π (γ -2A)/L
R-main hole driving diameter (m), main hole tunnel a diameter of 6.6m；
A-hole center is to the distance (m) on pit shaft periphery, and convenient for principle with drilling, inner ring hole takes 0.8m；Cycle hole abuts
The borehole wall, A values are 0.3；
L-slip casting pitch of holes (m), inner ring pitch of holes take 0.98m, are computed, and hole count is 16；Outer ring pitch of holes takes
1.18m is computed, and hole count is 16.
Inner ring orifice tube 12 uses 108 × 4.5mm steel pipes, and 12 length 5m of inner ring orifice tube is embedded to coagulation using built-in type
In native grout cover 6.
5 length 4m of outer ring orifice tube, is matched somebody with somebody using MKQJ120/40-HT types down-the-hole drill 14Bit bore.
3) slip casting section is high determines
It is integrated by aqueous layer thickness, the development degree of rock fracture and bore flooding quantity and determines that slip casting section is high.According to skip bucket
The thickness and bore flooding quantity of main shaft packsand determine a height of 35m of slip casting section or so.35m or so, driving 30m or so are noted, is reserved
The rock cap of 5m or so.
4) injected hole angle-determining
The high 35m of slip casting section, concrete grout cover 6 calculate as follows away from working face 6.2m, bore angle：
α=tan-1(S+A)/h
S-bottom hole exceeds the distance (m) beyond the base diameter of water-bearing layer, and inner ring hole takes 3.4m, cycle hole to take 5.7m；
A-drilling to concrete walling distance (m), inner ring hole takes 0.8m, cycle hole 0.3m；
The sum of h-concrete grout cover and slip casting section height (m), take 41.2m, be computed inner ring hole radial rake for 6 °, it is outer
Collar aperture radial rake is 8.3 °.
5) inner ring orifice tube installation is fixed
In rubble drainage layer 2, by the design position of inner ring orifice tube 12, helped in well and beat two rows of resin anchors 11, adopted
The upper/lower terminal of inner ring orifice tube 12 is fixed on mounted resin anchor 11 with the mode of welding, inner ring orifice tube 12
Between using reinforcing bar laterally, it is oblique be connected, all inner ring orifice tubes 12 is made to be linked to be an entirety.
6) casting concrete grout cover
Casting concrete grout cover 6, using C40 concrete, concrete grout cover 6 must exceed the former concrete built by laying bricks or stones
More than borehole wall 0.5m.The construction of concrete grout cover 6 belongs to mass concrete construction, to prevent the mass concrete heat of hydration from cooling down
Afterwards, volume of concrete is shunk, and makes to generate compared with big gap between grout cover 6 and the borehole wall, in concrete by cement consumption 6~
8% admixture swelling agent, inner ring orifice tube 12 are embedded in concrete grout cover 6.
(4) concrete grout cover pressure testing
After concrete setting 7 days, concrete strength can reach the 70%~90% of standard value, to shorten downtime, one
As selection concrete grout cover 6 solidify 7 days when start to concrete grout cover pressure testing.By 2 immersible pumps 13 from pre-buried center
It proposes in steel pipe 8,4 cun of 10MPa high-pressure ball valves 19 are welded on center steel pipe 8 and open ball valve discharges water.At the beginning of concrete grout cover 6
Secondary pressure testing：4 cun of high-pressure ball valves 19 of slowly closing mix 6 pressure testing of concrete grout cover, 6 compression situation of observation concrete grout cover
Solidifying soil grout cover 6 and concrete walling be no different shape and continue observation 8 it is small when, concrete grout cover and concrete walling still in
During stable state, first pressure testing success.6 two pressure testings of concrete grout cover：6 two pressure testings of concrete grout cover try for high pressure
Pressure, to 2 slip casting of rubble drainage layer and 6 compression situation of concrete grout cover is observed using 4 cun of high-pressure ball valves 19, notes weight ratio 1:1
Cement single slurry, observe water outlet status and concrete walling compression situation, after secondary pressure testing slip casting, former concrete walling
Integral strength is further strengthened, and after secondary pressure testing qualification, concrete grout cover 6, which has confirmed that, reaches requirement.
(5) drilling cramp and fixed drilling machine are installed
Matched somebody with somebody using MKQJ120/40-HT down-the-hole drills 14Drill bit andDrilling rod bores injected hole, matches somebody with somebodyIt bores
Head punching installation outer ring orifice tube 5, down-the-hole drill 14 are fixed using drilling cramp 16, and sliding rail frame 15 is fixed on drilling cramp 16, hidden hole drilling
14 direction-adjustable of machine and angle, drilling cramp 16 are fixed on using earth anchor 17 on concrete grout cover 6.Earth anchor 17 is swollen using 4 cement
Swollen anchor pole, long 1.2~1.5m.4 anchor poles are arranged at every orifice tube rear.
(6) injecting paste material is determined
To vertical circumferential directions double-round injected hole, inner ring hole cementing-waterglass biliquid slurry, cycle hole note chemistry
Slurry, the proportioning of the cement-sodium silicate double liquid are：Cement common 525#, waterglass concentration 40Be, modulus 2.8~
3.1；Cement mortar and waterglass volume ratio are 1: 0.6.Changing concentration is needed in construction, the ratio of mud of cement mortar is 1:0.4~1：
Between 0.5.
The master of the chemistry slurry is Lauxite and the mixture of acid curing agent, and the formula of modified urea-formaldehyde resin is pressed
Presetting period 3-5min according to slurries or so, final setting time 15-20min or so, gel time is controlled primarily by Lauxite (A
Liquid) with the volume ratio of acid curing agent (B liquid), it is necessary to using grouting pump (A according to a certain percentage:B=3:1~4：1) noted
Slurry.During slip casting A can be adjusted in time in the in vivo diffusion situation of slip casting according to slurries:B liquid proportionals are to control slurries
Gel time.
(7) Internal and external cycle mortar depositing construction
Grouting pressure (taking 2 times of hydrostatic pressures) is determined, according to 6 pressure testing of concrete grout cover as a result, determining cement-water glass
Glass dual slurry and Lauxite (A liquid) are designed and noted from the matched proportion density of acid curing agent (B liquid) and the single hole of different injecting paste materials
Enter amount, the sequence of construction entirely to drill is：It first carries out inner ring hole drilling and visits water, as found there is water to gush out, then drill to inner ring hole
And cement-sodium silicate double liquid slip casting is used, then to cycle hole drilling and chemical grouting, set if slurries injection rate has reached
Injection rate is counted, but grouting pressure is not reaching to when designing final grouting pressure, and slip casting terminates, sealing of hole.Entire slip casting process is using segmentation
Following formula is pressed into slip casting.
1) grouting pressure
Final grouting pressure is generally higher than hydrostatic pressure, generally hydrostatic pressure p02 times.Final grouting pressure takes 8MPa.Slip casting pressure
After power reaches final pressure, continue intravenous 10 minutes, then stop noting.
2) slurries injection rate
Slurries injection rate is roughly calculated according to dilation angle (5m) and rock fracture rate, and calculation formula is as follows：
R-grout spreading range (m)；H-slip casting section is high (m)；η-rock crack rate；The effective fill factor of β-slurries,
Take 0.8；M-calculus rate takes 0.85；λ-slurries loss coefficient takes 1.2
3) grouting equipment
Selection 2TGZ-60/210 types are electronic, 2ZBQ-11.5/3 Pneumatic injection pulp grinders, set up on the working face punching block of shaft bottom flat
The tablecloth puts grouting pump and mixer, the spice slip casting of shaft bottom scene.Cement, waterglass are transferred with well-bucket to working face.Use 3m3Hang
Personnel and material above and below bucket.
(8) slip casting effect is analyzed
To grouting pressure, flow, concentration of slurry in each hole section slip casting, the variation of water absorption is analyzed, judges to note
Whether slurry construction is qualified.Behind inspection hole end hole, if any water burst, measurement hydraulic pressure, water are converted into big well yield, see big well kick
Whether water is less than 2m3/ h, if the big well yield that inspection hole is computed out is respectively less than 2m3/ h, it is possible to think the slurry in crack
Liquid filling is full, closely knit, can terminate slip casting.It finally carries out wellbore centre and visits water hole drilling, carry out spy water, be used to check slip casting effect
Fruit.
Grouting method is combined to Hunan gold with chemical grout double-round curtain using vertical shaft working surface cement soluble glass paste
The skip bucket main shaft working face for belonging to ore deposit carries out grouting for water blocking.Partially aqueous layer, and water yield have been opened in grouting for water blocking leading face
Up to 100m3/h.When working face uses single cement injection and cement-water glass double grouting, it is found that grouting pressure is big, note
It is poor to starch effect, it is impossible to which when blocking underground water well, and using pure chemistry slurries slip casting, the cost for finding its slip casting is 3~5 times
Single cement injection and cement-water glass double grouting cost, and chemical slurry will serious polluted underground water, no
Beneficial to environmental protection.Combine grouting method with chemical grout double-round curtain using vertical shaft working surface cement soluble glass paste to construct
Afterwards, the nearly 100m before working face water is harnessed the river by slip casting3/ h is reduced to 1.8m3/ h can save the rows such as the artificial, electricity charge by calculating
Water rate is with more than 30 ten thousand yuan.Originally it is bright to not only reduce energy consumption, and provide reliable safety to the construction of deep shaft rock section
It ensures, relieves flood and threatened caused by construction personnel, create good operating environment to underground construction personnel, achieve
Good economic benefit and social benefit, have achieved the purpose that energy saving and environmentally friendly.Obtain good social and economic benefit.
Certainly, the above is the preferred embodiment of the present invention, it is noted that for the ordinary skill of the art
For personnel, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications
It is considered as protection scope of the present invention.
Claims (10)
1. a kind of vertical shaft working surface cement soluble glass paste combines grouting method with chemical grout double-round curtain, which is characterized in that
Double-round injected hole, inner ring hole cementing-waterglass biliquid slurry, the chemical slurry of cycle hole note are arranged to vertical shaft working surface.
2. according to the method described in claim 1, it is characterized in that, the inclination angle of the injected hole (9) of inner ring hole is less than cycle hole
Injected hole (18) inclination angle.
3. according to the method described in claim 1, its specific steps includes：
(1) working face goes out the clear bottom of cash；
(2) rubble drainage layer is constructed；
(3) concrete grout cover is constructed；
(4) concrete grout cover pressure testing；
(5) drilling cramp and fixed drilling machine are installed；
(6) injecting paste material is determined；
(7) Internal and external cycle mortar depositing construction；
(8) slip casting effect is analyzed.
4. according to the method described in claim 3, it is characterized in that,
Described (1) working face goes out the clear bottom of cash, and the spoil of vertical shaft working surface (1) is removed shaft bottom, and floating cash is cleaned out,
It will be risen on punching block to from 5~6m of working face positions.
5. according to the method described in claim 3, it is characterized in that,
(2) rubble drainage layer construction is that rubble drainage layer (2) is carried out on vertical shaft working surface (1) and is constructed, in the wellbore
Draw water in pre-buried two of portion center steel pipe (8), and the center steel pipe (8) that draws water is embedded into rubble drainage layer (2), two center steel pipes
(8) each built-in immersible pump (13) in, then, in two layers of rubble drainage layer (2) upper berth colour bar cloth (3) and one layer of malthoid (4),
Concrete grout cover (6) and rubble drainage layer (1) are separated.
6. according to the method described in claim 3, it is characterized in that,
(3) concrete grout cover construction is that concrete grout cover (6) is carried out on malthoid (4) and is constructed, true by calculating
Determine the thickness of concrete grout cover (6), according to slip casting pitch of holes, determine the hole count of inner ring injected hole (9), determine inner ring orifice tube
(12) position and length determine slip casting section height, determine the inclination angle of inner ring injected hole (9) and outer ring injected hole (18), and ensure
The inclination angle of inner ring hole injected hole (9) is less than the inclination angle of outer ring injected hole (18), along the equidistant installation inner ring of vertical circumferencial direction
Orifice tube (12), casting concrete grout cover (6).
7. according to the method described in claim 3, it is characterized in that,
(4) concrete grout cover pressure testing is, after concrete grout cover (6) is poured into a mould 7 days, to concrete grout cover (6) into
The first pressure testing of row and secondary pressure testing；After secondary pressure testing qualification, concrete grout cover (6) reaches requirement.
8. according to the method described in claim 3, it is characterized in that,
Described (5) the installation drilling cramp and fixed drilling machine are to be matched somebody with somebody using down-the-hole drill (14)Drill bit andDrilling rod bores note
Hole is starched, is matched somebody with somebodyDrill bit punches, and installation outer ring orifice tube (5), down-the-hole drill (14) is fixed using drilling cramp (16), sliding rail frame
(15) it is mounted on drilling cramp (16), sliding rail frame (15) can adjust direction, and sliding rail frame (15) down-the-hole drill (14) direction-adjustable
And angle, drilling cramp (16) are fixed on using earth anchor (17) on concrete grout cover (6).
9. according to the method described in claim 3, it is characterized in that,
(6) determine that injecting paste material is, inner ring hole cementing-waterglass biliquid slurry, the chemical slurry of cycle hole note, described
The proportioning of cement-sodium silicate double liquid is：Cement common 525#, waterglass concentration 40Be, modulus 2.8~3.1；Describedization
Slurry is learned as Lauxite and the mixture of acid curing agent, the volume of control Lauxite (A liquid) and acid curing agent (B liquid)
Than, it is necessary to using grouting pump A according to a certain percentage:B=3:1~4：1 carries out slip casting.
10. according to the method described in claim 3, it is characterized in that,
Described (7) the Internal and external cycle mortar depositing construction is to determine grouting pressure, takes 2 times of hydrostatic pressures, is tried according to concrete grout cover 6
Pressure as a result, determining the matched proportion density and not of cement-sodium silicate double liquid and Lauxite (A liquid) and acid curing agent (B liquid)
Single hole with injecting paste material designs injection rate, and the sequence of construction entirely to drill is：It first carries out inner ring hole drilling and visits water, as found have
Water is gushed out, then inner ring hole drilling and use cement-sodium silicate double liquid slip casting, and then drill to cycle hole simultaneously chemical grouting, such as
Pulp liquid injection rate has reached design injection rate, but grouting pressure is not reaching to when designing final grouting pressure, and slip casting terminates, sealing of hole；
Entire slip casting process is using segmentation following formula press-in slip casting.
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| CN113309522B (en) * | 2021-06-19 | 2022-11-04 | 莱州汇金矿业投资有限公司 | Construction method for pre-grouting water plugging concrete grout stop pad on working surface of kilometer vertical shaft |
| CN114893186A (en) * | 2022-06-02 | 2022-08-12 | 铜陵有色金属集团铜冠矿山建设股份有限公司 | Construction method for increasing sand discharge amount of vertical shaft by using down-the-hole drill |
| CN115142852A (en) * | 2022-06-09 | 2022-10-04 | 中煤第五建设有限公司 | Treatment method for deep pore water-containing stratum of vertical shaft working face |
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