CN107740707B - Method for preventing and controlling water damage in deep high-pressure-bearing underwater thick coal seam mining - Google Patents
Method for preventing and controlling water damage in deep high-pressure-bearing underwater thick coal seam mining Download PDFInfo
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- 239000003245 coal Substances 0.000 title claims abstract description 103
- 238000005065 mining Methods 0.000 title claims abstract description 86
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 80
- 238000000034 method Methods 0.000 title claims abstract description 54
- 238000005553 drilling Methods 0.000 claims abstract description 22
- 238000000926 separation method Methods 0.000 claims abstract description 19
- 239000011435 rock Substances 0.000 claims abstract description 7
- 239000003657 drainage water Substances 0.000 claims abstract description 5
- 238000005336 cracking Methods 0.000 claims description 6
- 238000004088 simulation Methods 0.000 claims description 6
- 238000005520 cutting process Methods 0.000 claims description 5
- 238000010586 diagram Methods 0.000 claims description 4
- 238000009933 burial Methods 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims description 3
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 238000009826 distribution Methods 0.000 claims description 3
- 239000012530 fluid Substances 0.000 claims description 3
- 238000011010 flushing procedure Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 238000007619 statistical method Methods 0.000 claims description 3
- 238000005086 pumping Methods 0.000 claims description 2
- 230000006578 abscission Effects 0.000 claims 1
- 230000002265 prevention Effects 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 230000009897 systematic effect Effects 0.000 abstract 1
- 238000009825 accumulation Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000032798 delamination Effects 0.000 description 1
- 230000005641 tunneling Effects 0.000 description 1
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- 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
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- 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
- E21F17/18—Special adaptations of signalling or alarm devices
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Abstract
A deep high-bearing-pressure underwater thick coal seam mining water hazard control method is based on comprehensive analysis of mine geological and hydrogeological conditions and determines a high-bearing-pressure water-bearing stratum deep in a thick coal seam roof. And dividing a coal face roof high-pressure water threat area on the basis of drilling data and thick coal seam mining overburden rock damage rule research. And determining the positions and parameters of a water drainage roadway and a drainage drilling hole according to the coal mining method of the working face of the threat zone, the position of the high-pressure-bearing water-containing layer, the position of the roof separation zone and the like. High confined aquifer water and roof separation water are drained through the drainage water drill hole, and meanwhile, the drainage roadway is used for automatically draining the drill water and the working area water. The hole-roadway combined water disaster prevention and control method realizes systematic comprehensive prevention and control of deep high-pressure-bearing underwater thick coal seam mining from dredging to draining, and provides technical support for coal mine safety production.
Description
Technical Field
The invention relates to a method for preventing and controlling water damage of a coal mine, in particular to a novel method for preventing and controlling water damage of deep high-pressure-bearing underwater thick coal seam mining.
Background
With the exploitation of a large amount of coal resources, shallow areas with good geological conditions gradually face resource exhaustion, and the exploitation depth of coal seams increases year by year. But for coal mine enterprises with large thickness of a loose layer in a mining area, large coal seam burial depth and complex hydrogeological conditions, the problem of mining under a top plate high pressure bearing aquifer is increasingly prominent. Coal seam exploitation under the high confined aquifer of deep, when the overburden mining crack reaches this aquifer, the working face water inflow increases in the twinkling of an eye, probably takes place the gushing water accident when serious, leads to equipment damage, the casualties even causes huge economic loss.
At present, no effective water hazard control method exists in the prior art for mining a thick coal seam under a high confined aquifer.
Disclosure of Invention
In order to solve the problem of water damage prevention and control of the exploitation of a thick coal seam under a high pressure bearing aquifer, the invention provides a method for preventing and controlling the water damage of the exploitation of a thick coal seam under a deep high pressure bearing aquifer, and the technical scheme adopted by the invention is as follows:
a method for preventing and controlling water damage in deep high-pressure-bearing underwater thick coal seam mining comprises the following steps:
(a) determining a high confined aquifer of the sandstone of the roof of the thick coal seam based on the comprehensive analysis of the geological and hydrogeological conditions of the mine;
(b) determining a cracking mining ratio and a separation zone position on the basis of drilling data and thick coal seam mining overburden failure rule research, and dividing a high confined aquifer threat zone of a coal face, wherein the cracking mining ratio is the ratio of the maximum height of a overburden failure water flowing fractured zone to the mining thickness;
(c) designing a roadway arrangement mode according to a coal mining method of a high confined aquifer threat zone working face, and determining a drainage roadway position;
(d) determining the position of a drilling site and drilling parameters for water drainage according to the position of a sandstone high-bearing water-bearing layer of a roof of a thick coal seam and the position of a roof separation zone;
(e) high confined aquifer water of the sandstone of the thick coal seam roof and roof separation water are drained through the drainage water drill hole, and the water of the drill hole and the water of the working area are automatically discharged by utilizing the drainage roadway.
A method for preventing and controlling water damage in deep high-pressure-bearing underwater thick coal seam mining is characterized by comprising the following steps: in the step (a), according to geological information and detection data, including lithology, thickness change characteristics, water head pressure and unit water inflow of a pumping test of the sandstone high confined aquifer of the top plate of the thick coal seam, the aquifer with the buried depth of more than 300m, the water head pressure of more than 3MPa and the unit water inflow of more than 1L/m.s is determined as the sandstone high confined aquifer of the top plate of the thick coal seam.
In the step (b) of the deep high-pressure-bearing underwater thick coal seam mining water damage prevention and control method, the thick coal seam mining overburden rock damage rule research is to comprehensively research the distribution characteristics, stress fields and displacement field characteristics of the thick coal seam mining overburden rock damage plastic region by adopting a drilling flushing fluid leakage amount and drilling color television on-site observation method, an empirical formula statistical method, a similar material simulation test and a computer numerical simulation method, and determine the fracture mining ratio and the position of the separation zone by comparing the research results of the methods.
In the step (b) of the deep high-bearing-pressure underwater thick coal seam mining water hazard control method, according to the thickness of a coal seam, the position of the coal seam and the position of a high-bearing-pressure aquifer of sandstone of a top plate of a thick coal seam, which are revealed by drilling holes of a whole mine, the height of a water-guiding fractured zone of the whole mine is calculated, an contour map of the height of the water-guiding fractured zone of the whole mine and a contour map of the interval between the thick coal seam and the high-bearing-pressure aquifer of the sandstone of the top plate of the thick coal seam are drawn, and an area, in which the height of the water-guiding fractured zone is greater than the.
In the step (c) of the method for preventing and controlling the water damage in the deep high-pressure-bearing underwater thick coal seam mining, when the working face of the high-pressure-bearing aquifer threatening area adopts a strike longwall coal mining method or an inclined longwall coal mining method for inclined mining, a double-roadway arrangement mode is adopted, a roadway with a lower elevation is used as a drainage roadway and also used as a mining roadway of an adjacent working face, and the drainage roadway is rectangular in cross section and 3-5m in width.
In the step (c) of the method for preventing and controlling the water damage in the deep high-pressure-bearing underwater thick coal seam mining, when the working face of the high-pressure-bearing aquifer threat zone adopts an inclined longwall coal mining method for inclined mining, a single-roadway arrangement mode is adopted, a water drainage roadway is arranged along the relatively lower position of the boundary elevation of the mining zone where the working face is located, and the water drainage roadway is also used as a cutting hole of the working face of the mining zone, is rectangular in cross section, and is 5-10m in width.
In the step (d) of the deep high-pressure-bearing underwater thick coal seam mining water hazard control method, according to the contour line of the bottom plate of the high-pressure-bearing aquifer of the sandstone of the top plate of the thick coal seam, determining the final hole position of the drainage drill hole at the position with lower elevation of the contour line of the bottom plate and the position of the overburden separation zone after coal seam mining, wherein the final hole position of the drill hole needs to be positioned above the high-pressure-bearing aquifer and the separation zone, designing the position of a drill site by combining the final hole position of the drill hole with field conditions, wherein the interval of the drill site is 50-100m, drawing a drill hole profile through the position of the drill site and the final hole position of the drill.
Compared with the prior art, the technical scheme of the invention has the following beneficial effects:
(1) according to the method for preventing and controlling the water damage in deep high-pressure-bearing underwater thick coal seam mining, the special drainage roadway is adopted to automatically discharge the drainage water of the drill hole, the roadway water accumulation and the working area water accumulation, so that the production cost can be reduced, the working surface environment is improved, and the safe production coefficient of the working surface is improved.
(2) According to the method for preventing and controlling the water damage in deep high-pressure-bearing underwater thick coal seam mining, the special water drainage roadway is used as the mining roadway or the cutting hole of the adjacent working face, so that the geological and hydrogeological conditions of a mining area can be further explored while the water damage is prevented and controlled, meanwhile, the water drainage drill hole of the top plate of the water drainage roadway can drain the water pressure of the high-pressure-bearing water-bearing stratum of the top plate of the adjacent working face, and the safe mining coefficient of the adjacent working face is improved.
(3) According to the method for preventing and controlling the water damage in the deep high-pressure underwater thick coal seam mining, the water drainage roadway is arranged at the position with a lower elevation or the cutting hole is used as the water drainage roadway, so that the method can provide water drainage conditions for the tunneling of other roadways and improve the construction environment.
Drawings
In order that the present disclosure may be more readily and clearly understood, reference is now made to the following detailed description of the present disclosure taken in conjunction with the accompanying drawings, in which:
FIG. 1 is a process flow chart of the method for preventing and controlling water damage in deep high-pressure-bearing underwater thick coal seam mining;
FIG. 2 is a schematic diagram of a roadway arrangement and drainage roadway of a high confined aquifer threat zone working face in mining by a strike longwall coal mining method according to an embodiment;
FIG. 3 is a schematic diagram of a roadway arrangement mode and a drainage roadway when the working face of a high confined aquifer threat zone of the second embodiment adopts an inclined longwall coal mining method for inclined mining;
FIG. 4 is a schematic diagram of a roadway arrangement mode and a drainage roadway when an inclined longwall coal mining method is adopted for a working face of a three-high confined aquifer threat zone in the embodiment;
FIG. 5 is a schematic view of a roof delamination zone drainage bore arrangement.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
Fig. 1-5 show a preferred embodiment of the method for preventing and controlling water damage in deep high-pressure-bearing underwater thick coal seam mining according to the invention.
Example one
The method for preventing and controlling the water damage in deep high-pressure-bearing underwater thick coal seam mining comprises the following steps:
(a) determining a high confined aquifer of the sandstone of the roof of the thick coal seam based on the comprehensive analysis of the geological and hydrogeological conditions of the mine;
(b) determining a cracking mining ratio and a separation zone position on the basis of drilling data and thick coal seam mining overburden failure rule research, and dividing a high confined aquifer threat zone of a coal face, wherein the cracking mining ratio is the ratio of the maximum height of a overburden failure water flowing fractured zone to the mining thickness;
(c) the method comprises the following steps of (1) mining a coal face of a high confined aquifer threat zone in a dip-slope manner by adopting a strike longwall coal mining method or an inclined longwall coal mining method, wherein the working face adopts a double-lane arrangement mode, a lane with a lower elevation is used as a drainage lane and is also used as a stoping lane of an adjacent working face, and the drainage lane is rectangular in cross section and 3-5m in width;
(d) determining the position of a drilling site and drilling parameters for water drainage according to the position of a sandstone high-bearing water-bearing layer of a roof of a thick coal seam and the position of a roof separation zone;
(e) high confined aquifer water of the sandstone of the thick coal seam roof and roof separation water are drained through the drainage water drill hole, and the water of the drill hole and the water of the working area are automatically discharged by utilizing the drainage roadway.
In the embodiment, in the step (a), according to geological information and detection data, including lithology, thickness change characteristics, head pressure and unit water inflow of a high confined aquifer of the sandstone of the thick coal seam roof, the aquifer with the burial depth of more than 300m, the head pressure of more than 3MPa and the unit water inflow of more than 1L/m.s is determined as the high confined aquifer of the sandstone of the thick coal seam roof.
In this embodiment, in the step (b), the thick coal seam mining overburden rock failure rule research is to comprehensively research distribution characteristics, stress fields and displacement field characteristics of a thick coal seam mining overburden rock failure plastic zone by adopting a drilling flushing fluid leakage amount and drilling color television on-site observation method, an empirical formula statistical method, a similar material simulation test and a computer numerical simulation method, and determine a fracture mining ratio and a position of a separation zone by comparing research results of the methods.
In this embodiment, in the step (b), according to the thickness of the exposed coal seam, the position of the coal seam and the position of the high confined aquifer of the sandstone of the top plate of the thick coal seam of the whole mine, the height of the water-guiding fractured zone of each drilled hole is calculated, an contour map of the height of the water-guiding fractured zone of the whole mine and a contour map of the interval between the thick coal seam and the high confined aquifer of the sandstone of the top plate of the thick coal seam are drawn, and a region in which the height of the water-guiding fractured zone is greater than the interval between the high confined aquifer of the sandstone of the top plate of the thick coal.
In the embodiment, in the step (d), according to the contour line of the bottom plate of the sandstone high confined aquifer of the top plate of the thick coal seam, determining the final hole position of the drainage drill hole at the position with lower elevation of the contour line of the bottom plate and the position of the overburden separation zone after coal seam mining, wherein the final hole position of the drill hole needs to be positioned above the high confined aquifer and the separation zone, designing the position of a drill site according to the final hole position of the drill hole and the field conditions, wherein the distance between the drill sites is 50-100m, drawing a drilling profile according to the position of the drill site and the final hole position of the drill hole, and calculating the number, azimuth angle, inclination angle and.
Example two
This embodiment is different from the first embodiment in that: in the embodiment, in the step (c), a strike longwall coal mining method or an inclined longwall coal mining method is adopted for inclined mining based on the working face of the high confined aquifer threat zone, a double-lane arrangement mode is selected for the working face, a lane with a low elevation is used as a drainage lane and also used as a stoping lane of an adjacent working face, and the drainage lane has a rectangular cross section and a width of 3-5 m.
EXAMPLE III
This embodiment is different from the first embodiment in that: in the step (c), inclined longwall coal mining is adopted based on the working face of the high confined aquifer threat zone, a single-lane arrangement mode is adopted, a drainage lane is arranged along the relatively lower position of the mining zone boundary elevation where the working face is located, and the drainage lane is also used as a cutting hole of the working face of the mining zone, is of a rectangular section, and is 5-10m in width.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are intended to be within the scope of the invention.
Claims (4)
1. A method for preventing and controlling water damage in deep high-pressure-bearing underwater thick coal seam mining is characterized by comprising the following steps: the method comprises the following steps:
(a) determining a high confined aquifer of the sandstone of the roof of the thick coal seam based on the comprehensive analysis of the geological and hydrogeological conditions of the mine;
in the step (a), according to geological information and detection data, including lithology, thickness change characteristics, water head pressure and unit water inflow of a pumping test of the sandstone high confined aquifer of the top plate of the thick coal seam, determining the aquifer with the burial depth of more than 300m, the water head pressure of more than 3MPa and the unit water inflow of more than 1L/m.s as the sandstone high confined aquifer of the top plate of the thick coal seam;
(b) determining a cracking mining ratio and a separation zone position on the basis of drilling data and thick coal seam mining overburden failure rule research, and dividing a high confined aquifer threat zone of a coal face, wherein the cracking mining ratio is the ratio of the maximum height of a overburden failure water flowing fractured zone to the mining thickness;
the thick coal seam mining overburden rock failure rule research is to comprehensively research the distribution characteristics, stress fields and displacement field characteristics of a thick coal seam mining overburden rock failure plastic region by adopting a drilling flushing fluid leakage amount and color drilling television on-site observation method, an empirical formula statistical method, a similar material simulation test and a computer numerical simulation method, and determine a fracture mining ratio and a position of an abscission zone by comparing the research results of the methods;
according to the thickness of a coal seam, the position of the coal seam and the position of a high confined aquifer of the sandstone of the top plate of the thick coal seam, which are revealed by drilling holes of the whole mine, calculating the height of a water-flowing fractured zone mined by each drilling hole of the thick coal seam, drawing a contour map of the height of the water-flowing fractured zone of the whole mine and a contour map of the interval between the high confined aquifer of the sandstone of the top plate of the thick coal seam and the thick coal seam, and dividing a region, the height of which is greater than the interval between the high confined aquifer of the sandstone of the;
(c) designing a roadway arrangement mode according to a coal mining method of a high confined aquifer threat zone working face, and determining a drainage roadway position;
(d) determining the position of a drilling site and drilling parameters for water drainage according to the position of a sandstone high-bearing water-bearing layer of a roof of a thick coal seam and the position of a roof separation zone;
(e) high confined aquifer water of the sandstone of the thick coal seam roof and roof separation water are drained through the drainage water drill hole, and the water of the drill hole and the water of the working area are automatically discharged by utilizing the drainage roadway.
2. The method for preventing and controlling water damage in deep high-pressure-bearing underwater thick coal seam mining according to claim 1, characterized by comprising the following steps: in the step (c), when the working face of the high confined aquifer threat zone adopts a strike longwall coal mining method or an inclined longwall coal mining method for inclined mining, a double-lane arrangement mode is adopted, a lane with low elevation is used as a drainage lane and also used as a stoping lane of an adjacent working face, the drainage lane is a rectangular cross section, and the width is 3-5 m.
3. The method for preventing and controlling water damage in deep high-pressure-bearing underwater thick coal seam mining according to claim 1, characterized by comprising the following steps: in the step (c), when the working face of the high confined aquifer threat zone adopts an inclined longwall coal mining method for inclined mining, a single-lane arrangement mode is adopted, a drainage lane is arranged along the relatively lower position of the mining zone boundary elevation where the working face is located, and the drainage lane is also used as a cutting hole of the mining zone working face, is a rectangular section and is 5-10m in width.
4. The method for preventing and controlling the water damage of deep high-pressure-bearing underwater thick coal seam mining according to any one of claims 1-2, characterized by comprising the following steps: in the step (d), according to the contour line of the bottom plate of the high confined aquifer of the sandstone of the top plate of the thick coal seam, determining the final hole position of the drainage drill hole at the position with lower elevation of the contour line of the bottom plate and the position of the overburden bed separation zone after coal seam mining, wherein the final hole position of the drill hole needs to be positioned above the high confined aquifer and the separation zone, designing the position of a drill site according to the final hole position of the drill hole and the field conditions, the distance between the drill sites is 50-100m, drawing a drilling section diagram according to the position of the drill site and the final hole position of the drill hole, and calculating the number, azimuth angle.
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| CN108643966A (en) * | 2018-04-24 | 2018-10-12 | 中煤西安设计工程有限责任公司 | A kind of floor undulation concentration sluicing lane method for arranging |
| CN108590754A (en) * | 2018-04-24 | 2018-09-28 | 中煤西安设计工程有限责任公司 | Concentrate sluicing lane method for arranging in a kind of monocline coal seam exploiting field |
| CN110259509B (en) * | 2019-05-09 | 2020-09-29 | 华北科技学院 | Trough type dredging method for treating water burst of downward-inclined mining goaf for coal mine |
| CN111237015A (en) * | 2020-01-10 | 2020-06-05 | 陕西有色榆林煤业有限公司 | Prediction method for goaf water accumulation area of long-wall fully mechanized mining face |
| CN111287747B (en) * | 2020-02-05 | 2022-03-22 | 天地科技股份有限公司 | Water-controlled coal mining method on pressure-bearing water body |
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| CN112302715B (en) * | 2020-11-06 | 2023-03-21 | 天地科技股份有限公司 | Soft sandstone aquifer dredging and lowering method |
| CN112901268B (en) * | 2021-01-19 | 2021-09-28 | 宿州学院 | Method for preventing and treating water damage of coal seam floor |
| CN112832769B (en) * | 2021-03-22 | 2023-03-14 | 中国矿业大学 | Outburst prevention mining method of coal seam floor high-pressure-bearing water freezing method |
| CN113217096A (en) * | 2021-06-03 | 2021-08-06 | 北京天地华泰矿业管理股份有限公司 | Goaf accumulated water treatment method suitable for multi-coal-seam mining monoclinic structure mining area |
| CN115324592A (en) * | 2022-07-26 | 2022-11-11 | 陕西延长石油矿业有限责任公司 | Dynamic monitoring and dynamic response control method for aquifer for well construction |
| CN117027934B (en) * | 2023-07-05 | 2024-06-07 | 中国矿业大学 | Water-bearing layer drainage hole arrangement method for coal mine roof water damage treatment |
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| CN100560944C (en) * | 2007-12-27 | 2009-11-18 | 淮北矿业（集团）有限责任公司 | Aquifer preventing and controlling method for coal face roof plate separation layer |
| CN101660427B (en) * | 2009-05-18 | 2011-04-13 | 中国矿业大学(北京) | Three-chart two-prediction method for quantitative evaluation and prediction of coal-bed top-plate water burst (inrush) conditions |
| CN102606175A (en) * | 2012-03-12 | 2012-07-25 | 山东新阳能源有限公司 | Method for plugging confined water in underground coal mine sandstone crack |
| CN102926803B (en) * | 2012-10-30 | 2014-12-10 | 开滦(集团)有限责任公司东欢坨矿业分公司 | Water drainage method for simultaneously exploiting water and coals under complicated hydrological condition |
| CN102943690B (en) * | 2012-10-30 | 2015-03-04 | 神华集团有限责任公司 | Method for preventing and treating separation layer water of top plate of coal face |
| CN103628914B (en) * | 2013-11-13 | 2016-04-13 | 陕西煤业化工技术研究院有限责任公司 | The separate zone production of a kind of low-angle dip coal seam is visited to lower and is oozed the method for low-permeability thick-layer bedrock aquifer |
| CN106354911B (en) * | 2016-08-25 | 2019-04-30 | 天地科技股份有限公司 | Pre- thin drop safety level determines method before a kind of top plate water-bearing layer is adopted |
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