CN103924975B - A kind of for the water-retaining method in coal mining process - Google Patents
A kind of for the water-retaining method in coal mining process Download PDFInfo
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- CN103924975B CN103924975B CN201410152267.2A CN201410152267A CN103924975B CN 103924975 B CN103924975 B CN 103924975B CN 201410152267 A CN201410152267 A CN 201410152267A CN 103924975 B CN103924975 B CN 103924975B
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 51
- 239000003245 coal Substances 0.000 title claims abstract description 51
- 238000005065 mining Methods 0.000 title claims abstract description 33
- 238000000034 method Methods 0.000 title claims abstract description 28
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 93
- 239000003673 groundwater Substances 0.000 claims abstract description 57
- 239000000523 sample Substances 0.000 claims abstract description 20
- 238000005516 engineering process Methods 0.000 claims abstract description 18
- 238000007569 slipcasting Methods 0.000 claims abstract description 12
- 230000003014 reinforcing Effects 0.000 claims abstract description 11
- 230000003068 static Effects 0.000 claims abstract description 10
- 238000001514 detection method Methods 0.000 claims description 16
- 239000011435 rock Substances 0.000 claims description 13
- 235000007164 Oryza sativa Nutrition 0.000 claims description 6
- 235000009566 rice Nutrition 0.000 claims description 6
- 230000015556 catabolic process Effects 0.000 claims description 4
- 238000009826 distribution Methods 0.000 claims description 3
- 240000007594 Oryza sativa Species 0.000 claims 1
- 238000005553 drilling Methods 0.000 abstract 1
- 238000000605 extraction Methods 0.000 description 6
- 241000209094 Oryza Species 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000002159 abnormal effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000003325 tomography Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 238000003379 elimination reaction Methods 0.000 description 2
- 238000005755 formation reaction Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000002633 protecting Effects 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 101710006658 AAEL003512 Proteins 0.000 description 1
- 235000019738 Limestone Nutrition 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 230000000903 blocking Effects 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 229910052570 clay Inorganic materials 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 231100001004 fissure Toxicity 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 239000011440 grout Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C41/00—Methods of underground or surface mining; Layouts therefor
- E21C41/16—Methods of underground mining; Layouts therefor
Abstract
The invention discloses a kind of for the water-retaining method in coal mining process, relate to underground mining method technical field.Comprise the steps: one, adopt three-dimensional probe technology to carry out three-dimensional probe to the underground water in underground coal mine digging area static bearing features, the complete situation of topping and natural conduit pipe developmental state; Two, the result detecting and obtain is combined; find the weak location in ground water protection layer and conduit pipe and there is the location of underground water spillage risk; adopt down-hole high pressure water jet drilling technology; by creeping into fast, accurately, quick slip casting shutoff conduit pipe and there is location, the grouting and reinforcing ground water protection layer of underground water spillage risk or stay and establish water conservation coal column.The inventive method while guaranteeing safety, efficient coal mining, can realize the protection to groundwater in mining area resource.
Description
Technical field
The present invention relates to underground mining method technical field.
Background technology
Coal, the ratio in China's primary energy consumption reaches 70%, in national economy is produced, occupy very consequence.But also very outstanding to the destruction problem of environment in coal production process, the problem such as surface collapse, Destruction of Groundwater Resources caused of mining, more and more causes various circles of society to pay attention to.
Tradition coal-mining technique, always using underground water as a kind of disaster, take the measure such as Draining hook, grouting treatment, or underground water discharged, or by water partial closure.The former causes a large amount of wastes of groundwater resources, causes groundwater level continuous decrease, forms Trend of Groundwater Descent Funnel.The latter changes ground water field feature, usually causes well discharge reduction even to stop, affects industrial or agricultural and urbanite water consumption.
Disclose according to " Geological Enviroment of Hebei Province situation publication in 2012 " that in July, 2013, Hebei Department of Land Resources of Shanxi Province issued, cone of depression 25 under the whole province's commonage, national Trend of Groundwater Descent Funnel is more than 100.In the last thirty years, groundwater table range of decrease 20-30m near Korea tourists hundred spring geohydrologic unit spring mouth.And the great water leak accident in colliery each time, declining to a great extent usually with surrounding dozens of kilometres scope inner region groundwater table.And the draining of hundreds of cubic metres per hour easily of each mine, especially to the imbody of Destruction of Groundwater Resources and waste.
Contradiction between the urgency of protection of groundwater resource and the imperfection of coal mining water conservation technology highlights day by day, and the research of coal mining water conservation technology just seems more and more important.
By specific technique tackling key problem research; while guaranteeing safety, efficient coal mining; carry out the protection to coal field groundwater resources; reduce mine drainage amount; the protection of the exploitation of coal resources with groundwater resources is combined; build the spy of mine water, prevent, control, protect, use integrated protection, the improvement system of five in one; final realization coal mining water conservation, coal and water two spike-type cultivars is made overall planning, the situation of the harmonious win-win of human and environment; to health, the sustainable development of coal in China industry, the structure of harmonious society, Ecological Society is significant.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of for the water-retaining method in coal mining process, and the method while guaranteeing safety, efficient coal mining, can realize the protection to groundwater in mining area resource.
For solving the problems of the technologies described above, the technical solution used in the present invention is: a kind of for the water-retaining method in coal mining process, comprises the steps:
One, three-dimensional probe technology is adopted to carry out three-dimensional probe to the underground water in underground coal mine digging area static bearing features, the complete situation of ground water protection layer and natural conduit pipe developmental state;
Two, the result detecting and obtain is combined; find the weak location in ground water protection layer and conduit pipe and there is the location of underground water spillage risk; high-pressure water jet is adopted to creep into technology; by creeping into fast, accurately, quick slip casting shutoff conduit pipe and there is location, the grouting and reinforcing ground water protection layer of underground water spillage risk or stay and establish water conservation coal column.
Preferably; On Microseismic Monitoring Technique is also adopted to carry out omnidistance dynamic monitoring to rock breakdown situation during coal-face and aquifer, surrounding area and the coal mining of ground water protection layer between the above-mentioned first step and second step; by microseismic event to rock stratum near coal-face time, empty distribution situation monitors, analyzes, and collects that underground water flows, the change of ground water protection layer, natural conduit pipe stability, artificially conduit pipe developmental state and there is the information in location of underground water spillage risk.
Preferred further, the detailed description of the invention of On Microseismic Monitoring Technique is: wave detector is arranged to ring-type along roadway workface top board, base plate, left side, right side, and each wave detector is connected on same monitor by data wire, forms a monitoring means; Arrange a monitoring means along work plane upper and lower crossheading interval 200-300 rice, multiple monitoring means forms a complete work plane monitoring network.
Preferably, in the above-mentioned first step, three-dimensional probe technology is roadway multi-azimuth advance detection method, the multi-parameter spatial of Roadway Leading Prospecting data becomes figure method and work plane coal seam to adopt the Detection Techniques of front three-dimensional probe methods combining use.
The beneficial effect adopting technique scheme to produce is:
(1) the present invention adopts three-dimensional probe technology to be the comprehensive exploration technology of Main Means, find out underground coal mine production area and the static bearing features of surrounding underground water, understand underground water (Different Waters such as aquifer, old empty water) tax and deposit position, scope and ground water protection layer weak location, conduit pipe developmental state etc., for the first step is carried out in ground water protection work;
(2) On Microseismic Monitoring Technique is adopted, monitoring face stoping period country rock ground water protection layer rock breakdown and conduit pipe situation of change, coordinate the various features parameter monitorings such as underground water hydraulic pressure, the water yield, water temperature, water quality, isotope, find out digging area variation of groundwater dynamic feature, the artificial conduit pipe developmental state understood natural conduit pipe steadiness and formed because of mining work activities, leaks and destroys whether there is underground water and locus is monitored, early warning; The design of On Microseismic Monitoring Technique detailed description of the invention makes a monitoring means, and its monitoring, control range can covering radius be the sphere space of 300-500 rice;
(3) high-pressure water jet is taked to creep into technology and slurry injection technique; to explored ground water protection layer local weak location and conduit pipe and there is underground water spillage risk location; carry out grouting and reinforcing, shutoff; or take to stay the method for establishing water conservation coal column; underground water spillage risk is eliminated in bud, reduces the destruction of mining to underground water to greatest extent, greatly improve the safety of coal mining activity; improve operating efficiency, there is good realistic meaning.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation;
Fig. 1 is that in the embodiment of the present invention 4,9315 work planes adopt front three-dimensional probe and grouting and reinforcing schematic diagram;
Fig. 2 is 2120 work plane air channel roadway multi-azimuth advance detection work arrangement figure in the embodiment of the present invention 3;
Fig. 3 A, Fig. 3 B are that curve map is explained in the detection of Fig. 2;
Fig. 4 is the roadway multi-azimuth advance detection schematic diagram mentioned in the present invention;
Fig. 5 is that front three-dimensional probe schematic diagram is adopted in the work plane coal seam mentioned in the present invention;
In figure, 1,2120 work plane air channels; 2, a position is stopped; 3, Abnormal belt of low resistivity; 4, a position is cut in design; 5,2298 work plane high water level; 6, digging laneway is met head on; 7, detection direction; 8, control range; 9, aquifer; 10, Xia Xiang; 11, old dead zone; 12, Mining failure scope; 13, Shang Xiang; 14, water guide karst collapse col umn; 15, three-dimensional probe.
Detailed description of the invention
Embodiment 1
For the water-retaining method in coal mining process, comprise the steps:
One, adopt roadway multi-azimuth advance detection method (patent No. is ZL201110095155.4), the multi-parameter spatial of Roadway Leading Prospecting data becomes figure method (patent No. is ZL201110389923.7) and work plane coal seam to adopt front three-dimensional probe method (patent No. is ZL201210112477.X) to form three-dimensional probe method (Fig. 4, 5), find out the static bearing features of underground water under the reset condition of underground coal mine digging area, find out that digging laneway is met head on front, front, side, top board, base plate and face roof, base plate, multiple orientation groundwater occurrence situations such as periphery, the complete situation of ground water protection layer, natural conduit pipe developmental state etc.
Comprehensive, harmless detecting is carried out to the static bearing features of groundwater in mining area; find out that the rich water level in underground reservoir space is put, scope and the natural conduit pipe developmental state such as tomography, karst collapse col umn; do not use probing etc. to form the exploration means of damage and fracture to aquifer, be the first step carrying out ground water protection work as far as possible.
Two, according to the aforementioned detection to the static bearing features of underground water, the complete situation of ground water protection layer, natural conduit pipe and monitoring result; find ground water protection layer local weak location and conduit pipe and there is the location of underground water spillage risk, take ground water protection layer local weak location grouting and reinforcing, the measures such as slip casting shutoff are carried out to conduit pipe and the location that there is underground water spillage risk.The present invention adopts high-pressure water jet to creep into technology; slip casting shutoff is carried out to the natural conduit pipe existed around work plane, artificial conduit pipe and the location that there is underground water spillage risk; grouting and reinforcing is carried out to ground water protection layer local weak location; reinforcement ground water protection layer to greatest extent; become the complete ground water protection layer of sufficient intensity; creep into fast and accurately, fast slip casting, to administer fast; in the very first time, underground water is leaked elimination in bud, reach the object of protection underground water.
Tradition machine dimensions drill, the boring that the 100m of construct is dark needs 2-3 days, adopts high-pressure water jet technology of creeping into only to need 1-2 hour, and accurate positioning of holing, and borehole bottom location deviation is generally within 2-3 rice.For the shutoff of natural conduit pipe and artificial conduit pipe, a fast word be given prominence to.Quick discovery, quick blocking, by High Pressure Pure Water slurry prime, at very first time shutoff conduit pipe, eliminate underground water spillage risk in bud.
Consider the change of the forward and backward work plane of back production stress field peripherally; rock stratum deforms to destroy and can hardly be avoided; in the grouting and reinforcing work of ground water protection layer local weak location; by adding the material such as clay, flyash in cement grout; while raising ground water protection layer compressive strength; increase the flexibility of injecting paste material targetedly, improve topping plasticity_resistant deformation ability, very useful to available protecting underground water.
Or stay and establish water conservation coal column.
Slip casting and stay the selection of establishing water conservation coal column, can select according to situations such as the cost of reality, degrees of risk.
Embodiment 2
One, adopt roadway multi-azimuth advance detection method (patent No. is ZL201110095155.4), the multi-parameter spatial of Roadway Leading Prospecting data becomes figure method (patent No. is ZL201110389923.7) and work plane coal seam to adopt front three-dimensional probe method (patent No. is ZL201210112477.X) to form three-dimensional probe method (Fig. 4, 5), find out the static bearing features of underground water under the reset condition of underground coal mine digging area, find out that digging laneway is met head on front, front, side, top board, base plate and face roof, base plate, multiple orientation groundwater occurrence situations such as periphery, the complete situation of ground water protection layer, natural conduit pipe developmental state etc.
Comprehensive, harmless detecting is carried out to the static bearing features of groundwater in mining area; find out that the rich water level in underground reservoir space is put, scope and the natural conduit pipe developmental state such as tomography, karst collapse col umn; do not use probing etc. to form the exploration means of damage and fracture to aquifer, be the first step carrying out ground water protection work as far as possible.
Two, adopt On Microseismic Monitoring Technique, omnidistance dynamic monitoring is carried out to coal-face and aquifer, surrounding area and ground water protection layer rock breakdown situation during mining.So that Timeliness coverage problem, takes measures in time, the generation of underground water leakage and water inrush accident in very first time prevention coal mining process.
Under nature, groundwater occurrence is in a specific environment and aquifer, is in a kind of equilibrium state.Near aquifer after the extraction of coal seam, formation goaf, coal-face position (water space or excessively aquaporin), adjoining rock generation is caving, forms mining induced fissure, these cracks are once link up with aquifer, the artificial conduit pipe of underground water will be become, underground water will flow into goaf and through discharge ground, goaf, cause the destruction to groundwater resources.Above-mentioned crack forming process and underground water break through the process in the goaf of rock stratum inflow around, are exactly the rupture process of rock stratum around work plane in fact, all can with each small seismic events.The present invention takes On Microseismic Monitoring Technique, monitor by the time to microseismic event generation in rock stratum near coal-face, frequency, energy and space distribution situation etc. many aspects, analyze, just can capture the information that underground water flows, changes, collect the information that underground water flows, changes and may occur to leak; Understand natural conduit pipe steadiness and the artificial conduit pipe developmental state because of mining work activities formation, and then for taking ground water protection measure to provide foundation fast.
The detailed description of the invention of On Microseismic Monitoring Technique is: wave detector is arranged to ring-type along roadway workface top board, base plate, left side, right side, and each wave detector is connected on same monitor by dedicated data line, forms a monitoring means; Arrange a monitoring means along work plane upper and lower crossheading interval 200-300 rice, multiple monitoring means forms a complete work plane monitoring network.A monitoring means, monitoring, control range can covering radius be the sphere space of 300-500 rice.According to working face extraction progress, Monitor Sub-Station of Less adopts laddering alternately move mode outwards movement, realizes continuous, all standing monitoring to whole work plane and surrounding rock stratum.
Whole observation process will run through the work plane preparatory stage and terminate a period of time to working face extraction, guarantees the omnidistance dynamic monitoring that location may occur to leak to ground water protection layer situation of change, around natural conduit pipe steadiness in whole monitoring periods, artificial conduit pipe developmental state, underground water.
Three, according to the aforementioned detection to the static bearing features of underground water, the complete situation of ground water protection layer, natural conduit pipe and artificial conduit pipe developmental state, variation of groundwater dynamic and monitoring result; find ground water protection layer local weak location and conduit pipe and there is the location of underground water spillage risk, take ground water protection layer local weak location is carried out to grouting and reinforcing, carried out the measures such as slip casting shutoff to conduit pipe and the location that there is underground water spillage risk.The present invention adopts high-pressure water jet to creep into technology; slip casting shutoff is carried out to the natural conduit pipe existed around work plane, artificial conduit pipe and the location that there is underground water spillage risk; grouting and reinforcing is carried out to ground water protection layer local weak location; creep into fast and accurately, fast slip casting, to administer fast; in the very first time, underground water is leaked elimination in bud, reach the object of protection underground water.
Or stay and establish water conservation coal column.
Embodiment 3:
Certain ore deposit 2120 work plane is 12# coal driving face, the long 1208m of trends of design.
On December 24th, 1, in 2120 work plane top 9# coal 2298 work plane fortune drivings, base plate water burst occurs, maximum flooding quantity is 172m
3/ h, causes that neighbouring 2278 work planes are flooded, the whole mine north wing stops production.
After 13 years, 918m position is tunneled in 2120 work plane air channels, seminar adopts " roadway multi-azimuth advance detection method " (patent No. ZL201110095155.4, ZL201110389923.7), and to meeting head on, multi-faceted, three-dimensional probe is carried out in high water level exceptions area, front.
Fig. 2 is 2120 work plane air channel roadway multi-azimuth advance detection work arrangement figure; Fig. 3 A, Fig. 3 B are that curve map (apparent resistivity logarithm ds isopleth plan view) is explained in the detection of Fig. 2;
Show in figure, front, tunnel exists one and draws a circle to approve region with air channel approximately perpendicular Abnormal belt of low resistivity 3(thick dashed line).In this abnormal plane in NNE to ribbon spread, with air channel near normal, spatially in tilt banded spread, think for water conductive fault reflection.
Consider that this tomography is across 2120 work planes (design), tunnel continue driving and working face extraction generation water inrush accident may be very large, therefore, ore deposit side determines to change former design scheme, and air channel stops driving, stay and establish water conservation coal column (because position is in edge, two ore deposits for this reason, mineral resources are few, and grouting cost is high, and exploitation has a big risk, water conservation coal column is established so stay), work plane retreats 300m and rearranges recovery system.Avoid once the generation of contingent driving gushing water and underground water leakage accident.
Embodiment 4:
Certain mine 9315 work plane master adopts Carboniferous System 9# coal.Apart from aquifer in Ordovician limestone 33m under floor undulation, bear Ordovician karst water pressure 1.2 ~ 1.4MPa.
On December 5th ~ 8,1, seminar adopts work plane coal seam to adopt front three-dimensional probe method (patent No. ZL201210112477.X)), draw a circle to approve moisture exception 5 place, see 1#, 2#, 3#, 4#, 5# in Fig. 1.
After this, according to result of detection, ore deposit side carries out boring grouting reinforcing to floor undulation (there is the location of underground water spillage risk), adopts high-pressure water jet to creep into technology, creeps into fast and accurately, fast slip casting.Wherein, floor undulation injected hole 55, slip casting 1299.45t, enters the WS4-1 boring of 4# exceptions area, hole depth 73.6m, water yield 15m
3/ h, single hole injects cement 950t, accounts for 67.9% of whole work plane 55 bored grouting total amounts.
The enforcement of this project, successful shutoff floor undulation natural conduit pipe, effectively eliminates working face extraction gushing water hidden danger, avoids primary excavation water inrush accident.
At present, work plane is safety coal extraction, reaches coal mining water conservation object.
Claims (2)
1., for the water-retaining method in coal mining process, it is characterized in that comprising the steps:
Step one, employing three-dimensional probe technology carry out three-dimensional probe to the underground water in underground coal mine digging area static bearing features, the complete situation of ground water protection layer and natural conduit pipe developmental state;
Step 2, combination detect the result obtained, find the weak location in ground water protection layer and conduit pipe and there is the location of underground water spillage risk, high-pressure water jet is adopted to creep into technology, by creeping into fast, accurately, quick slip casting shutoff conduit pipe and there is location, the grouting and reinforcing ground water protection layer of underground water spillage risk or stay and establish water conservation coal column;
On Microseismic Monitoring Technique is also adopted to carry out omnidistance dynamic monitoring to rock breakdown situation during coal-face and aquifer, surrounding area and the coal mining of ground water protection layer between above-mentioned steps one and step 2, by microseismic event to rock stratum near coal-face time, empty distribution situation monitors, analyzes, and collects that underground water flows, the change of ground water protection layer, natural conduit pipe stability, artificially conduit pipe developmental state and there is the information in location of underground water spillage risk;
The detailed description of the invention of described On Microseismic Monitoring Technique is: wave detector is arranged to ring-type along roadway workface top board, base plate, left side, right side, and each wave detector is connected on same monitor by data wire, forms a monitoring means; Arrange a monitoring means along work plane upper and lower crossheading interval 200-300 rice, multiple monitoring means forms a complete work plane monitoring network.
2. according to claim 1 a kind of for the water-retaining method in coal mining process, it is characterized in that in above-mentioned steps one, three-dimensional probe technology be roadway multi-azimuth advance detection method, the multi-parameter spatial of Roadway Leading Prospecting data become figure method and work plane coal seam adopt front three-dimensional probe methods combining use Detection Techniques.
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| CN201410152267.2A CN103924975B (en) | 2014-04-16 | 2014-04-16 | A kind of for the water-retaining method in coal mining process |
| PCT/CN2014/094945 WO2015158153A1 (en) | 2014-04-16 | 2014-12-25 | Water conservation method used in coal mining process |
| CA2945852A CA2945852C (en) | 2014-04-16 | 2014-12-25 | Water conservation method used in coal mining process |
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| CN103924975B (en) * | 2014-04-16 | 2016-01-20 | 河北煤炭科学研究院 | A kind of for the water-retaining method in coal mining process |
| CN104329092A (en) * | 2014-09-01 | 2015-02-04 | 山东科技大学 | Old empty water waterproof coal pillar setting-up method |
| CN104612688A (en) * | 2015-01-20 | 2015-05-13 | 西安科技大学 | Water-preserving coal mining method for multi-seam mining of ecologically vulnerable area |
| CN104564074A (en) * | 2015-01-21 | 2015-04-29 | 西安科技大学 | Method for implementing water-preserved coal mining of coal mining area |
| CN104989453A (en) * | 2015-06-19 | 2015-10-21 | 河北煤炭科学研究院 | Coal mine water burst down-hole full-space real-time continuous monitoring early-warning method |
| CN105137487A (en) * | 2015-09-30 | 2015-12-09 | 河北煤炭科学研究院 | Underground water flow field description method based on manual water discharging interference field |
| CN106050234B (en) * | 2016-05-26 | 2019-01-25 | 中国神华能源股份有限公司 | The construction technology that underground water is protected in progress of coal mining |
| CN106437843B (en) * | 2016-08-30 | 2019-12-10 | 大连理工大学 | coal mine bottom plate water guide channel identification method based on microseismic monitoring |
| CN106990033A (en) * | 2017-06-05 | 2017-07-28 | 安徽理工大学 | A kind of experimental rig for simulating Genesis of Karst Subsided Column evolutionary process |
| CN108119142B (en) * | 2017-11-09 | 2019-05-17 | 中国矿业大学 | - three-two subregion water-protection coal-mining methods of band of five figures |
| CN108915766B (en) * | 2018-07-10 | 2020-09-29 | 河北煤炭科学研究院 | Method for exploring deep hidden water guide channel of working surface |
| CN112814737A (en) * | 2021-03-10 | 2021-05-18 | 淮南矿业(集团)有限责任公司 | Collapse column advanced treatment method and system based on laminated multi-branch horizontal well |
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| SU1571250A2 (en) * | 1988-09-26 | 1990-06-15 | Nikiforov Nikolaj | Method of protecting mine working against surface water inflow |
| RU2153072C1 (en) * | 1999-02-09 | 2000-07-20 | Институт горного дела СО РАН | Method of preparing inundated kimberlite pipe for underground mining |
| CN1963148A (en) * | 2006-11-17 | 2007-05-16 | 中国矿业大学 | Water-protection coal-mining method using structural key layer as waterproof layer |
| CN101021154A (en) * | 2007-03-23 | 2007-08-22 | 中国矿业大学 | Thin basic rock shallow buried coal seam longwall face water retaining mining method |
| CN102505943A (en) * | 2011-11-21 | 2012-06-20 | 西安科技大学 | Water conservation coal cutting method for small and medium-sized coal mines in waterhead area |
| CN102865078A (en) * | 2012-04-28 | 2013-01-09 | 中国神华能源股份有限公司 | Method of determining water-preserved mining geological conditions under loose water bearing layer |
| CN102767371A (en) * | 2012-06-25 | 2012-11-07 | 西安科技大学 | Method for realizing water-preserved mining by utilizing curtain grouting technology |
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| CA2945852C (en) | 2019-05-07 |
| CA2945852A1 (en) | 2015-10-22 |
| CN103924975A (en) | 2014-07-16 |
| WO2015158153A1 (en) | 2015-10-22 |
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