CN104819010A - Construction method used for preventing roof and floor water inrush in the case that mine working surfaces pass through faults with water permeability - Google Patents
Construction method used for preventing roof and floor water inrush in the case that mine working surfaces pass through faults with water permeability Download PDFInfo
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- CN104819010A CN104819010A CN201510134180.7A CN201510134180A CN104819010A CN 104819010 A CN104819010 A CN 104819010A CN 201510134180 A CN201510134180 A CN 201510134180A CN 104819010 A CN104819010 A CN 104819010A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 70
- 238000010276 construction Methods 0.000 title claims abstract description 34
- 230000035699 permeability Effects 0.000 title abstract 3
- 239000003245 coal Substances 0.000 claims abstract description 38
- 239000011435 rock Substances 0.000 claims abstract description 21
- 238000000034 method Methods 0.000 claims abstract description 19
- 238000005516 engineering process Methods 0.000 claims abstract description 10
- 238000003325 tomography Methods 0.000 claims description 29
- 238000007569 slipcasting Methods 0.000 claims description 24
- 239000004570 mortar (masonry) Substances 0.000 claims description 13
- 239000004568 cement Substances 0.000 claims description 12
- 238000001514 detection method Methods 0.000 claims description 9
- 230000008093 supporting effect Effects 0.000 claims description 8
- 238000005065 mining Methods 0.000 claims description 6
- 239000004575 stone Substances 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 5
- 230000003204 osmotic effect Effects 0.000 claims description 5
- 235000019353 potassium silicate Nutrition 0.000 claims description 4
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 4
- 238000013461 design Methods 0.000 claims description 3
- 238000010348 incorporation Methods 0.000 claims description 3
- 238000005259 measurement Methods 0.000 claims description 3
- 230000010287 polarization Effects 0.000 claims description 3
- 239000002994 raw material Substances 0.000 claims description 3
- 239000011347 resin Substances 0.000 claims description 3
- 229920005989 resin Polymers 0.000 claims description 3
- 239000004576 sand Substances 0.000 claims description 3
- 210000002966 serum Anatomy 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 230000001052 transient effect Effects 0.000 claims description 3
- 230000004888 barrier function Effects 0.000 claims description 2
- 238000005553 drilling Methods 0.000 claims description 2
- 238000004873 anchoring Methods 0.000 abstract 1
- 238000004080 punching Methods 0.000 abstract 1
- 239000011378 shotcrete Substances 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000013005 condensation curing Methods 0.000 description 3
- 238000009792 diffusion process Methods 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 206010058109 Hangnail Diseases 0.000 description 1
- 239000004115 Sodium Silicate Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000007596 consolidation process Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 229910052911 sodium silicate Inorganic materials 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
- E21D11/105—Transport or application of concrete specially adapted for the lining of tunnels or galleries ; Backfilling the space between main building element and the surrounding rock, e.g. with concrete
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
- E21D20/02—Setting anchoring-bolts with provisions for grouting
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F16/00—Drainage
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Structural Engineering (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention discloses a construction method used for preventing roof and floor water inrush in the case that mine working surfaces pass through faults with water permeability. According to the invention, prejudice of the prior art is broken through, the process of draining water and lowering pressure at first and then punching key hole is applied innovatively, a grouting anchor rod is used for carrying out anchoring and grouting on key holes, and then sprayed concrete is adopted for filling up the sunken areas around surrounding rocks, roofs and floors. Drainage is carried out on the key holes to lower pressure, grouting is carried out on the key holes to anchor and reinforce the surrounding rocks, then support on the surrounding rocks is carried out, the mechanical property of crushed zones around the faults and fissure zones of the roofs and floors of coal beds is improved, the technological means of improving seepage resistance is adopted, and therefore the mine working surfaces can safely pass through the faults with water permeability. The construction method has the advantages of being high in safety and reliability, simple, low in cost and high in technology promotion value.
Description
Technical field
The present invention relates to the construction method of the pre-Against Water Inrush of a kind of underground coal mine, when particularly relating to a kind of Coal Face Passing Through water conductive fault, prevent and treat the construction method of roof and floor gushing water.
Background technology
Along with the continuous increase of coal mining depth, mining conditions, geological conditions become increasingly complex, in working face extraction process, often there is passing fault back production, this brings very large difficulty to safety in production, especially during passing fault, is easy to occur the accidents such as mine water inrush, roof fall, country rock are caving.Main cause is, the existence of tomography destroys the integrality of floor strata, reduces the intensity of rock mass, and fault belt has good transmissibility and water storage again.
For a long time, those skilled in the art thinks always: for high pressure water conductive fault, can only block up, Bu Nengfang, if discharged water, tomography geological conditions can be caused more severe; During Coal Face Passing Through Fault, the tectonic termination integrality of rock stratum, needs to caunch or act as a planted agent, increases workload; In addition, if direct supporting during passing fault, boring amount will be increased, and supporting effect is undesirable, the accidents such as roof fall, pucking, gushing water easily occur.
Although prior art has worked out safe precaution measure and seam mining method that various coal mine work area crosses water conductive fault, but, its safety aspect is good solution never, and the reliability of these methods and cost control aspect also exist all many-sided deficiencies.
Summary of the invention
The object of the invention is to, provide that a kind of construction method is simple, the construction method of reliability, coal mine work area that safety is good roof and floor gushing water when crossing water conductive fault.
The technical scheme that the present invention is adopted for achieving the above object is, prevents the construction method of top board and Water Inrush, it is characterized in that, comprise the following steps when a kind of coal mine work area crosses water conductive fault:
The first step, carries out meticulous detection to the neighboring region in water conductive fault periphery different distance, obtains corresponding geological conditions data, specific as follows:
In working face mining process, when working face wall distance water conductive fault is 140m, adopt the three-dimensional position of 3-d seismic exploration technology long-range detection tomography;
When distance water conductive fault is 100m, adopt the spatial shape of distance measurement tomography in Transient Electromagnetic Technique;
When distance water conductive fault is 60m, adopt the watery of induced polarization technology proximity detection tomography;
Second step, when the advance of the face is to tomography waterproof safety coal column, at working face wall symmetrical centre point place, play ejectment in the horizontal direction and close keyhole, aperture is 42mm, and hole depth is until in fault belt, carry out drawing drainage and step-down, until hydraulic pressure is reduced to below 0.2MPa;
The width L of above-mentioned tomography waterproof safety coal column, calculates by following design formulas:
In above formula (1):
A is safety factor (empirical data, span is 2 ~ 5);
M is coal seam thickness;
P is born hydraulic pressure by water barrier;
K
pfor the tensile strength in coal seam;
3rd step, plays slip casting and closes keyhole, and anchor bolt grouting reinforce adjoining rock, method is as follows:
In the midpoint of working face wall and base plate intersection, get first slip casting perpendicular to tomography and close keyhole, hole depth is until fault belt;
Midpoint on intersection between working face wall and top board, gets that one is inclined upwardly, the second slip casting of forming an angle with horizontal plane closes keyhole, and hole depth is until fault belt;
Then, use grouted anchor bar to close in keyhole and the second slip casting pass keyhole respectively to above-mentioned first slip casting and carry out anchor bolt grouting;
4th step, after anchor bolt grouting, when being constantly advanced into exposure water conductive fault with work plane, first adopts resin anchor to carry out supporting, after supporting completes to face roof and both sides country rock;
Adopt sprayed mortar to fill and lead up the sunk area of country rock, top board and base plate three periphery separately again, namely complete construction.
The technique effect that technique scheme is directly brought is, first, closes keyhole Draining hook by ejectment; Then, close keyhole grouting reinforcement rock by slip casting, reduce boring amount, realize far-end to dam shutoff, strengthen zone of fracture and Seam Roof And Floor around tomography and destroy the mechanical property of band, the accidents such as control gushing water, roof fall, pucking, make coal mine work area safety water conductive fault.
The construction method of technique scheme, overcomes the technology prejudice that those skilled in the art are long-term, courageously adopts the technological thought of Draining hook, closing keyhole, carrying out Draining hook by first playing ejectment; On this basis, play slip casting and close keyhole, and carry out anchor bolt grouting, reinforce; Finally use the sunk area of sprayed mortar reinforce adjoining rock, top board and base plate three periphery separately, thus realize coal mine work area safety water conductive fault.
Above-mentioned construction method is simple, boring amount is little, because anchor bolt grouting is based upon on the basis of Draining hook, this significantly reduces difficulty of construction and the construction workload of slip casting, and significantly improve grouting consolidation effect, thus when ensure that Coal Face Passing Through water conductive fault, top board and base plate there will not be water inrush accident;
And the last sunk area with sprayed mortar reinforce adjoining rock, top board and base plate three periphery separately, thus realize coal mine work area safety water conductive fault.
The safety and reliability of above-mentioned construction method when water conductive fault is crossed in preventive works face in top board and Water Inrush is good, and can effectively eliminate because the water inrush accident generation of other secondary disasters that may cause.
Be preferably, the angle of above-mentioned angle is determined by following formula:
In above formula (2):
H is overlying rock height of water flowing fractured zone;
L is the width of tomography waterproof safety coal column.
The technique effect that this optimal technical scheme is directly brought is, above formula is adopted to carry out the calculating at the second keyhole angle of inclination, slip casting pass, and according to this result of calculation guiding construction, both rapid construction and cost control had been conducive to, be conducive to again increasing work efficiency, reduce the waste of the manpower and materials caused by maloperation.
Further preferably, the mixed serum that the grouting pressure of above-mentioned anchor bolt grouting is 0.3 ~ 0.8MPa, injecting paste material is cement and water glass, grouting mode are osmotic grouting.
The technique effect that this optimal technical scheme is directly brought is, the grouting pressure of osmotic grouting is 0.3 ~ 0.8MPa, can ensure that the diffusion zone of slip casting is enough large; And use admixture to have the cement paste of water glass, the moisture of cement paste can be reduced, ensure that the diffusion zone of slip casting is enough large further, and accelerate the condensation cure speed of cement paste, shorten construction period, improve efficiency of construction.
Further preferably, the strength grade of above-mentioned sprayed mortar is C20.
The technique effect that this optimal technical scheme is directly brought is that practical production experience shows, the strength grade of sprayed mortar selects C20 fully can meet the requirement of safety.
Further preferably, above-mentioned sprayed mortar is prepared as follows: raw material is cement, sand, stone and accelerating admixture, and adding water to mix and stir forms; Wherein, by weight Shui Ni ︰ Sha ︰ stone=1 ︰ 2 ︰ 2; The incorporation of accelerating admixture is 2 ~ 3.5% of cement weight.
The technique effect that this optimal technical scheme is directly brought is, can accelerate concrete condensation cure speed, improves efficiency of construction.
In sum, instant invention overcomes the technology prejudice of prior art, it is good that it has safety and reliability relative to prior art, the beneficial effects such as construction method is simple, efficiency is high, cost is low.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is described in detail.
Embodiment 1
For certain colliery, in recovery process, when crossing water conductive fault to this coal mine work area, the construction method of top board and Water Inrush is prevented to be illustrated:
Construction method, comprises the following steps:
The first step, carries out meticulous detection to the neighboring region in water conductive fault periphery different distance, obtains corresponding geological conditions data, specific as follows:
1, in working face mining process, when working face wall distance water conductive fault is 140m, the three-dimensional position of 3-d seismic exploration technology long-range detection tomography is adopted.The information obtained is: this work plane front water guide normal fault bearing of trend is nearly NNW-SSE, length 1.8km.
2, when distance water conductive fault is 100m, the spatial shape of distance measurement tomography in Transient Electromagnetic Technique is adopted.The information obtained is: fault throw 80-120m; Tendency NW, 45 °, inclination angle.
3, when distance water conductive fault is 60m, the watery of induced polarization technology proximity detection tomography is adopted.The information obtained is: tomography top is aquifer, has stronger watery, hydraulic pressure 2.1MPa.
Second step, calculates the width L of tomography waterproof safety coal column by following design formulas:
According to the reality in this colliery, get margin A=3, coal seam thickness M=2.1m, hydraulic pressure P=2.1MPa, the tensile strength K in coal seam
p=0.21MPa.
Calculated by (1) formula, the width of tomography waterproof safety coal column is 16.1m.
When the advance of the face is to distance tomography 16.1m, at working face wall symmetrical centre point place, plays ejectment in the horizontal direction and close keyhole, aperture is 42mm, hole depth penetrates tomography waterproof safety coal column until enter in fault belt, carries out drawing drainage and step-down, is reduced to below 0.2MPa to hydraulic pressure;
3rd step, plays slip casting and closes keyhole, and anchor bolt grouting reinforce adjoining rock, drilling method is as follows:
In the midpoint of working face wall and base plate intersection, get first slip casting perpendicular to tomography and close keyhole, hole depth is until fault belt;
Midpoint on intersection between working face wall and top board, gets that one is inclined upwardly, the second slip casting of forming an angle with horizontal plane closes keyhole, and hole depth is until fault belt; The angular dimension of this angle is determined by following formula:
In above formula (2), get the overlying rock height of water flowing fractured zone h=16m in this ore deposit, due to the width L=16.1m of tomography waterproof safety coal column.These angle number of degrees can be calculated and approximate 45 °.
Then, use grouted anchor bar to close in keyhole and the second slip casting pass keyhole respectively to above-mentioned first slip casting and carry out anchor bolt grouting.Concrete operations are: install anchor head, grouted anchor bar being injected slip casting closes in keyhole, anchor pole tangles by hangnail on anchor head immediately, stop grouting plug, backing plate, nut are installed, and then by quick filling adaptor by end of anchor rod with is connected slurry filling machine connection, controlled by grouting pressure at 0.6MPa, injecting paste material is cement-sodium silicate pair slurries, its proportioning is 1:1, and grouting mode is osmotic grouting.
When two fluid grouting is 110L/min, after stablizing 20 ~ 30min, estimate that slip casting penetration radius reaches certain scope, when can meet the coffer mechanics intensity improved around tomography, terminate slip casting.
4th step, after anchor bolt grouting, when being constantly advanced into exposure water conductive fault with work plane, first adopts resin anchor to carry out supporting to the top board of work plane and both sides country rock; After supporting completes, then adopt sprayed mortar to fill and lead up the sunk area of country rock, top board and base plate three periphery separately, namely complete construction.
In actual production process, when this coal mine work area crosses water conductive fault, its top board and base plate are and occur gushing water, also do not occur comparatively significantly Seepage.Construction method of the present invention is described, when it crosses water conductive fault to coal mine work area, the effect of prevention top board and Water Inrush is fairly obvious.
Supplementary notes:
1, according to the specific requirement of the aspect such as construction speed, construction period, the mixed serum that the grouting pressure of above-mentioned anchor bolt grouting can be selected arbitrarily within the scope of 0.3 ~ 0.8MPa, injecting paste material is cement and water glass, grouting mode are osmotic grouting.
2, the strength grade of above-mentioned sprayed mortar is C20, can meet construction requirement.
3, above-mentioned sprayed mortar is preferably, and prepare as follows: raw material is cement, sand, stone and accelerating admixture, adding water to mix and stir forms; Wherein, by weight Shui Ni ︰ Sha ︰ stone=1 ︰ 2 ︰ 2; The incorporation of accelerating admixture is 2 ~ 3.5% of cement weight.Such sprayed mortar, on the one hand, its mobile performance is good; On the other hand, its condensation cure time is relatively reasonable, constructability.
Claims (5)
1. prevent a construction method for top board and Water Inrush when coal mine work area crosses water conductive fault, it is characterized in that, comprise the following steps:
The first step, carries out meticulous detection to the neighboring region in water conductive fault periphery different distance, obtains corresponding geological conditions data, specific as follows:
In working face mining process, when working face wall distance water conductive fault is 140m, adopt the three-dimensional position of 3-d seismic exploration technology long-range detection tomography;
When distance water conductive fault is 100m, adopt the spatial shape of distance measurement tomography in Transient Electromagnetic Technique;
When distance water conductive fault is 60m, adopt the watery of induced polarization technology proximity detection tomography;
Second step, when the advance of the face is to tomography waterproof safety coal column, at working face wall symmetrical centre point place, play ejectment in the horizontal direction and close keyhole, aperture is 42mm, hole depth penetrates tomography waterproof safety coal column until enter in fault belt, carries out drawing drainage and step-down, is reduced to below 0.2MPa to hydraulic pressure;
The width L of above-mentioned tomography waterproof safety coal column, calculates by following design formulas:
In above formula (1):
A is safety factor (empirical data, span is 2 ~ 5);
M is coal seam thickness;
P is born hydraulic pressure by water barrier;
K
pfor the tensile strength in coal seam;
3rd step, plays slip casting and closes keyhole, and anchor bolt grouting reinforce adjoining rock, drilling method is as follows:
In the midpoint of working face wall and base plate intersection, get first slip casting perpendicular to tomography and close keyhole, hole depth is until fault belt;
Midpoint on intersection between working face wall and top board, gets that one is inclined upwardly, the second slip casting of forming an angle with horizontal plane closes keyhole, and hole depth is until fault belt;
Then, use grouted anchor bar to close in keyhole and the second slip casting pass keyhole respectively to above-mentioned first slip casting and carry out anchor bolt grouting;
4th step, after anchor bolt grouting, when being constantly advanced into exposure water conductive fault with work plane, first adopts resin anchor to carry out supporting to the top board of work plane and both sides country rock; After supporting completes, then adopt sprayed mortar to fill and lead up the sunk area of country rock, top board and base plate three periphery separately, namely complete construction.
2. prevent the construction method of top board and Water Inrush when coal mine work area according to claim 1 crosses water conductive fault, it is characterized in that, the angle of described angle is determined by following formula:
In above formula (2):
H is overlying rock height of water flowing fractured zone;
L is the width of tomography waterproof safety coal column.
3. when coal mine work area according to claim 1 crosses water conductive fault, prevent the construction method of top board and Water Inrush, it is characterized in that, the grouting pressure of described anchor bolt grouting is 0.3 ~ 0.8MPa, mixed serum that injecting paste material is cement and water glass, grouting mode be osmotic grouting.
4. prevent the construction method of top board and Water Inrush when coal mine work area according to claim 1 crosses water conductive fault, it is characterized in that, the strength grade of described sprayed mortar is C20.
5. when coal mine work area according to claim 5 crosses water conductive fault, prevent the construction method of top board and Water Inrush, it is characterized in that, described sprayed mortar is prepared as follows: raw material is cement, sand, stone and accelerating admixture, and adding water to mix and stir forms; Wherein, by weight Shui Ni ︰ Sha ︰ stone=1 ︰ 2 ︰ 2; The incorporation of accelerating admixture is 2 ~ 3.5% of cement weight.
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| CN201510134180.7A CN104819010B (en) | 2015-03-26 | 2015-03-26 | The construction method of prevention top board and Water Inrush when a kind of coal mine work area crosses water conductive fault |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106050185A (en) * | 2016-05-13 | 2016-10-26 | 山东科技大学 | Method for preventing and controlling water inrush channels generated by faults of coal mining floors |
| CN106089296A (en) * | 2016-06-16 | 2016-11-09 | 陕西省煤田地质有限公司 | A kind of prevention and treatment method of roof absciss layer water |
| CN109681269A (en) * | 2019-01-16 | 2019-04-26 | 内蒙古上海庙矿业有限责任公司 | Soft rocks are lauched-and husky mixing is prominent gushes Prevention Technique method |
| CN110685740A (en) * | 2019-09-26 | 2020-01-14 | 天地科技股份有限公司 | Method for preventing water damage of shallow-buried deep-thick coal seam mining burned rock |
| CN112901272A (en) * | 2021-01-15 | 2021-06-04 | 贵州化工建设有限责任公司 | Geophysical prospecting and drilling cooperative advanced water detection and drainage construction method |
| CN113738448A (en) * | 2021-09-13 | 2021-12-03 | 中国矿业大学 | Mining rock mass seepage and water inrush near-far multisource grading information intelligent monitoring and early warning method |
| CN114837663A (en) * | 2022-05-20 | 2022-08-02 | 安徽建筑大学 | Construction method for improving recovery rate of fault waterproof coal pillar through ground pre-grouting |
| CN115012933A (en) * | 2022-05-20 | 2022-09-06 | 安徽恒源煤电股份有限公司 | Zonal grouting construction method for stoping fault waterproof coal pillar |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106050185A (en) * | 2016-05-13 | 2016-10-26 | 山东科技大学 | Method for preventing and controlling water inrush channels generated by faults of coal mining floors |
| CN106089296A (en) * | 2016-06-16 | 2016-11-09 | 陕西省煤田地质有限公司 | A kind of prevention and treatment method of roof absciss layer water |
| CN109681269A (en) * | 2019-01-16 | 2019-04-26 | 内蒙古上海庙矿业有限责任公司 | Soft rocks are lauched-and husky mixing is prominent gushes Prevention Technique method |
| CN110685740A (en) * | 2019-09-26 | 2020-01-14 | 天地科技股份有限公司 | Method for preventing water damage of shallow-buried deep-thick coal seam mining burned rock |
| CN112901272A (en) * | 2021-01-15 | 2021-06-04 | 贵州化工建设有限责任公司 | Geophysical prospecting and drilling cooperative advanced water detection and drainage construction method |
| CN113738448A (en) * | 2021-09-13 | 2021-12-03 | 中国矿业大学 | Mining rock mass seepage and water inrush near-far multisource grading information intelligent monitoring and early warning method |
| CN114837663A (en) * | 2022-05-20 | 2022-08-02 | 安徽建筑大学 | Construction method for improving recovery rate of fault waterproof coal pillar through ground pre-grouting |
| CN115012933A (en) * | 2022-05-20 | 2022-09-06 | 安徽恒源煤电股份有限公司 | Zonal grouting construction method for stoping fault waterproof coal pillar |
| CN115012933B (en) * | 2022-05-20 | 2023-01-17 | 安徽恒源煤电股份有限公司 | Zonal grouting construction method for stoping fault waterproof coal pillar |
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