CN112832769A - Outburst prevention mining method of coal seam floor high-pressure-bearing water freezing method - Google Patents
Outburst prevention mining method of coal seam floor high-pressure-bearing water freezing method Download PDFInfo
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- CN112832769A CN112832769A CN202110303828.4A CN202110303828A CN112832769A CN 112832769 A CN112832769 A CN 112832769A CN 202110303828 A CN202110303828 A CN 202110303828A CN 112832769 A CN112832769 A CN 112832769A
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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
- E21C41/18—Methods of underground mining; Layouts therefor for brown or hard coal
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C37/00—Other methods or devices for dislodging with or without loading
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- E—FIXED CONSTRUCTIONS
- E21—EARTH 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
- E21D11/38—Waterproofing; Heat insulating; Soundproofing; Electric insulating
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- E—FIXED CONSTRUCTIONS
- E21—EARTH 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
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Abstract
The invention relates to the technical field of coal mining and mine water damage prevention and control, and discloses a coal seam floor high-pressure-bearing water freezing method outburst prevention mining method, which comprises the following steps: a. constructing a plurality of bottom plate drill holes in the stoping roadway 2, exploring the hydrogeological condition of the coal bed bottom plate high confined water 8 in the mining area, and acquiring the coal bed bottom plate high confined water 8 layer and the area boundary; b. constructing a refrigeration chamber 4 in the stoping roadway 2, wherein the chamber interval is 200m, and a refrigeration device and a refrigeration pipeline 7 are installed in the chamber; c. and (3) constructing frozen drill holes 5 in the stoping roadway 2, wherein the diameter of each drill hole is 100mm, the distance between every two drill holes is 1.5m, the final hole position of each frozen drill hole 5 should exceed the aquifer 9, and the exceeding distance is not less than 20% of the thickness of the aquifer 9. The outburst prevention mining method for the coal seam floor high-pressure bearing water freezing method is good in water-resisting performance and strong in adaptability to stratum, can effectively prevent the outburst accident of the roadway floor during the stoping period, reduces deformation of the roadway floor in the freezing area, and achieves safe and efficient production of a mine.
Description
Technical Field
The invention relates to the technical field of coal mining and mine water damage prevention, in particular to a coal seam floor high-pressure-bearing water freezing method outburst prevention mining method.
Background
Coal resources are main energy sources of economic development in China, but mine water inrush accidents frequently occur along with gradual increase of mine mining depth and scale in recent years, according to statistics of relevant national mechanisms, in major mine disaster accidents, water disaster accidents are second place higher in the number of people who cause mine death and are next to gas accidents, as the hydrological and geological conditions of mines in China are complex, coal seam floor water permeation accidents are aggravated year by year during stoping of a working face, the problem of mine water disaster prevention is more prominent, safe and efficient production of the mines is seriously affected, and therefore how to prevent and control high-pressure water outburst of the coal seam floor is urgent, the coal seam floor water seepage prevention and control method not only becomes a scientific problem to be solved in the mining industry, but also is an inevitable requirement of a new-era mine green environment-friendly mining concept.
A plurality of expert scholars at home and abroad research the water inrush prevention and control technology of the coal seam floor, and the following achievements are obtained: (1) timely detecting a water-rich area, and adopting a grouting reinforcement method aiming at the area with the water inrush tendency to ensure the safe production of a working surface; (2) the early warning capability of water inrush accidents is enhanced by adopting various detection methods, such as a drilling water injection method, a stress-displacement monitoring method, geophysical prospecting and the like; (3) the mining height of a working face is reduced, and the influence of mining on a coal seam floor aquifer is reduced; (4) the size of the reserved coal pillar is increased, and the influence of mining on the floor rock stratum is weakened.
The technology has the defects of poor water-resisting performance, untimely early warning, waste of coal resources and loss of water resources, so that how to consider safe and efficient coal resource exploitation and underground water resource protection is a scientific problem to be solved urgently in the mining industry at present.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides the outburst prevention mining method of the coal seam floor high-pressure bearing water freezing method, which has the advantages of better water-resisting performance, stronger adaptability to stratum, convenient construction, and the like, is beneficial to solving the problem of roadway floor heave during stoping, and solves the problems of poor water-resisting performance, untimely early warning, waste of coal resources and loss of water resources in the prior art.
(II) technical scheme
In order to achieve the purpose, the invention provides the following technical scheme: a coal seam floor high pressure bearing water freezing method outburst prevention mining method comprises the following steps:
a. constructing a plurality of bottom plate drill holes in a stoping roadway, exploring the high-pressure-bearing hydrogeological condition of the coal bed bottom plate in a mining area, and acquiring the high-pressure-bearing water layer position of the coal bed bottom plate and the area boundary;
b. constructing a refrigeration chamber in a stoping roadway, wherein the chamber interval is 200m, and a refrigeration device and a refrigeration pipeline are installed in the chamber;
c. freezing drill holes are constructed in a stoping roadway, the diameter of each drill hole is 100mm, the distance between every two drill holes is 1.5m, the final hole position of each freezing drill hole is required to exceed a water-bearing stratum, and the exceeding distance is not less than 20% of the thickness of the water-bearing stratum;
d. the refrigerating device is connected with the freezing drill holes through a refrigerating pipeline, freezing is carried out on the aquifer of the bottom plate, the width of a freezing curtain is not less than 2m, the freezing curtain is constructed on the crossed boundary of the mining area and the high-pressure water of the coal seam bottom plate, the high-pressure water of the coal seam bottom plate is isolated from the mining area, and the high-pressure water of the coal seam bottom plate is prevented from being discharged into the mining area during the stoping period;
e. after the freezing work is finished, arranging a pumping system in the stoping roadway, pumping the high-pressure bearing water of the coal bed bottom plate in the freezing curtain out of the mining area, and artificially reducing the water flow and water pressure of the bottom plate in the mining area;
f. and after the pumping and drainage work is finished, preparing the extraction of the working face, stopping freezing the frozen drill holes in the cutting holes before the extraction of the working face, stopping maintaining and freezing the frozen drill holes when the working face is extracted to a position 10m away from the frozen drill holes in the two roadways, naturally thawing the frozen drill holes, and stopping freezing the frozen drill holes from the extraction stopping line to the roadways in the extraction area after the extraction of the working face is finished.
Preferably, the refrigeration chamber is positioned on the coal wall on the non-recovery side of the roadway, the distance between the freezing drilling hole and the coal wall on the non-recovery side is 150mm, and the drilling hole is vertically drilled.
Preferably, the positive freezing temperature of the freezing drill hole is-28 ℃ to-30 ℃, the freezing time is not less than 35d, and the maintenance freezing temperature is-22 ℃ to-25 ℃.
Preferably, when the bottom plate of the mining area contains high-pressure water, the stoping roadway and the roadway of the mining area corresponding to the working face need to be constructed with frozen holes, namely, a frozen curtain constructed by the frozen holes is required to surround the boundary of the whole mining area, and after freezing is finished, a pumping system is arranged to pump the high-pressure water away from the bottom plate of the coal seam in the mining area, so that a drainage channel of the pressure water into the mining area is blocked.
Preferably, when high pressure water is distributed in a partial area of the bottom plate of the mining area, only frozen drill holes are needed to be constructed at the position where the high pressure water of the bottom plate of the coal seam intersects with the boundary of the mining area, a frozen curtain is constructed, and after freezing is finished, a pumping and discharging system is arranged to pump the high pressure water of the bottom plate of the coal seam away from the mining area, so that underground water is prevented from being discharged into the mining area.
(III) advantageous effects
Compared with the prior art, the invention provides a coal seam floor high-pressure-bearing water freezing method outburst prevention mining method, which has the following beneficial effects:
1. the coal seam floor high pressure water freezing method outburst prevention mining method is characterized in that a plurality of floor drilling holes are constructed in a mining roadway 2 to find the hydrogeological condition and the boundary condition of coal seam floor high pressure water 8 in a mining area, then a cold chamber 4 is built in the mining roadway 2, a refrigerating device and a refrigerating pipeline 7 are installed in the cold chamber 4, freezing drilling holes 5 are constructed in the mining roadway 2, when the mining area floor contains high pressure water, the freezing drilling holes 5 are completely constructed in a roadway needing corresponding mining, a freezing curtain 6 is required to surround the whole mining area boundary, then the freezing drilling holes 5 are communicated with a refrigerating pipeline 7, a refrigerating device is used for freezing water, after freezing is finished, the coal seam floor high pressure water 8 in the mining area is pumped out through a pumping system, the pressure water is blocked from draining channels in the mining area, in addition, when the mining area floor part contains the high pressure water, the freezing borehole 5 is constructed only at the position where the coal bed bottom plate high pressure water 8 intersects with the boundary of the mining area, the freezing curtain 6 is constructed, then the freezing borehole 5 is communicated with the freezing borehole through the refrigerating pipeline 7, the refrigerating device is used for freezing the water body, the pumping system is used for pumping the coal bed bottom plate high pressure water 8 in the mining area after freezing, and a drainage channel of the pressure water to the mining area is blocked, so that the water flow and the water pressure of the bottom plate in the mining area are artificially reduced, and the working face 1 is stoped after pumping, so that the effective mining is integrally realized, the drainage of the bottom plate pressure water to the mining area is avoided, and the purposes of safe mining of coal resources and underground water resource protection are effectively considered.
2. The outburst prevention mining method of the coal seam floor high pressure bearing water freezing method has the following advantages: (1) the freezing method has incomparable advantages in the aspect of water-resisting performance compared with other methods, and meanwhile, the method has strong adaptability to various stratums and can effectively prevent the pressure-bearing water of the coal seam floor from being discharged to a mining area; (2) the method is simple to operate and flexible to construct, normal production of a working face is not influenced during stoping, the method is green, environment-friendly and pollution-free, and after stoping is finished, a frozen area is naturally thawed, and runoff and drainage of confined water of the bottom plate are not influenced; (3) the method greatly enhances the strength of the coal seam floor rock mass in the freezing area and reduces the roadway floor heave amount during mining.
Drawings
FIG. 1 is a cross-sectional view of a freeze method for a water-bearing stratum of a floor of a coal seam in a mining area according to the present invention;
FIG. 2 is a plan view of the arrangement of the freezing method when the high confined water is distributed in the whole mining area of the present invention;
FIG. 3 is a plan view of a freeze method layout of the present invention with a portion of the mined area distributing high confined water;
FIG. 4 is a plan view of the freezing method extension range and freezing curtain width of the present invention.
In the figure: 1 working face, 2 stoping roadways, 3 mining area roadways, 4 refrigeration chambers, 5 freezing drilling holes, 6 freezing curtains, 7 refrigeration pipelines, 8 high confined water of a coal seam floor, 9 aquifers, 10 freezing expansion areas and 11 freezing curtain widths.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-4, a coal seam floor high pressure water freezing method outburst prevention mining method includes the following steps:
a. constructing a plurality of bottom plate drill holes in the stoping roadway 2, exploring the hydrogeological condition of the coal bed bottom plate high confined water 8 in the mining area, and acquiring the coal bed bottom plate high confined water 8 layer and the area boundary;
b. constructing a refrigeration chamber 4 in the stoping roadway 2, wherein the refrigeration chamber 4 is positioned on the non-stoping side coal wall of the roadway, the chamber interval is 200m, and a refrigeration device and a refrigeration pipeline 7 are installed in the chamber;
c. constructing frozen drill holes 5 in a stoping roadway 2, wherein the diameter of the drill holes is 100mm, the distance between the drill holes is 1.5m, the distance between the frozen drill holes 5 and a coal wall on a non-stoping side is 150mm, the drill holes are vertically drilled, the positive freezing temperature of the frozen drill holes 5 is-28 ℃ to-30 ℃, the freezing time is not less than 35d, the freezing temperature is maintained to be-22 ℃ to-25 ℃, the final hole positions of the frozen drill holes 5 are required to exceed an aquifer 9, and the exceeding distance is not less than 20% of the thickness of the aquifer 9;
d. the refrigerating device is connected with the freezing drill hole 5 through a refrigerating pipeline 7, freezing is carried out on a bottom plate aquifer 9, the width 11 of a freezing curtain is not less than 2m, a freezing curtain 6 is constructed on the intersected boundary of a mining area and coal bed bottom plate high-pressure water 8, the coal bed bottom plate high-pressure water 8 is isolated from the mining area, and the coal bed bottom plate high-pressure water 8 is prevented from being discharged into the mining area during the stoping period;
e. after the freezing work is finished, a pumping system is arranged in the mining roadway 2, the high pressure bearing water 8 of the coal bed bottom plate in the freezing curtain 6 is pumped out of the mining area, and the water flow and water pressure of the bottom plate in the mining area are artificially reduced;
f. after the pumping and drainage work is finished, the working face 1 is ready for stoping, the frozen drill holes 5 in the cutting holes are stopped freezing before the stoping of the working face 1, when the stoping of the working face 1 reaches a position 10m away from the frozen drill holes 5 in the two roadways, the frozen drill holes 5 are stopped maintaining and freezing, the frozen drill holes 5 are naturally unfrozen, and the frozen drill holes 5 from the stoping line to the roadway 3 in the mining area are stopped freezing after the stoping of the working face 1 is finished.
When the bottom plate of the mining area contains high-pressure water, the stoping roadway 2 and the roadway of the mining area corresponding to the working face 1 need to be constructed with the freezing drill holes 5, namely, the freezing curtain 6 constructed by the freezing drill holes 5 is required to surround the boundary of the whole mining area, and after freezing is finished, a pumping and drainage system is arranged to pump the high-pressure water 8 of the bottom plate of the coal bed in the mining area, so that the drainage channel of the pressure water to the mining area is blocked.
When high pressure water is distributed in a part of areas of the bottom plate of the mining area, only frozen drill holes 5 need to be constructed at the positions where the high pressure water 8 of the bottom plate of the coal seam intersects with the boundary of the mining area, a frozen curtain 6 is constructed, and after freezing is finished, a pumping and discharging system is arranged to pump the high pressure water 8 of the bottom plate of the coal seam in the mining area, so that underground water is prevented from being discharged into the mining area.
In conclusion, the outburst prevention mining method of the coal seam floor by the high pressure-bearing water freezing method has the following advantages: (1) the freezing method has incomparable advantages in the aspect of water-resisting performance compared with other methods, and meanwhile, the method has strong adaptability to various stratums and can effectively prevent the pressure-bearing water of the coal seam floor from being discharged to a mining area; (2) the method is simple to operate and flexible to construct, normal production of a working face is not influenced during stoping, the method is green, environment-friendly and pollution-free, and after stoping is finished, a frozen area is naturally thawed, and runoff and drainage of confined water of the bottom plate are not influenced; (3) the method greatly enhances the strength of the coal seam floor rock mass in the freezing area and reduces the roadway floor heave amount during mining.
It is to be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. The outburst prevention mining method of the coal seam floor high pressure bearing water freezing method is characterized by comprising the following steps:
a. constructing a plurality of bottom plate drill holes in the stoping roadway 2, exploring the hydrogeological condition of the coal bed bottom plate high confined water 8 in the mining area, and acquiring the coal bed bottom plate high confined water 8 layer and the area boundary;
b. constructing a refrigeration chamber 4 in the stoping roadway 2, wherein the chamber interval is 200m, and a refrigeration device and a refrigeration pipeline 7 are installed in the chamber;
c. constructing frozen drill holes 5 in the stoping roadway 2, wherein the diameter of each drill hole is 100mm, the distance between every two drill holes is 1.5m, the final hole position of each frozen drill hole 5 should exceed the aquifer 9, and the exceeding distance is not less than 20% of the thickness of the aquifer 9;
d. the refrigerating device is connected with the freezing drill hole 5 through a refrigerating pipeline 7, freezing is carried out on a bottom plate aquifer 9, the width 11 of a freezing curtain is not less than 2m, a freezing curtain 6 is constructed on the intersected boundary of a mining area and coal bed bottom plate high-pressure water 8, the coal bed bottom plate high-pressure water 8 is isolated from the mining area, and the coal bed bottom plate high-pressure water 8 is prevented from being discharged into the mining area during the stoping period;
e. after the freezing work is finished, a pumping system is arranged in the mining roadway 2, the high pressure bearing water 8 of the coal bed bottom plate in the freezing curtain 6 is pumped out of the mining area, and the water flow and water pressure of the bottom plate in the mining area are artificially reduced;
f. after the pumping and drainage work is finished, the working face 1 is ready for stoping, the frozen drill holes 5 in the cutting holes are stopped freezing before the stoping of the working face 1, when the stoping of the working face 1 reaches a position 10m away from the frozen drill holes 5 in the two roadways, the frozen drill holes 5 are stopped maintaining and freezing, the frozen drill holes 5 are naturally unfrozen, and the frozen drill holes 5 from the stoping line to the roadway 3 in the mining area are stopped freezing after the stoping of the working face 1 is finished.
2. The coal seam floor high pressure bearing water freezing method outburst prevention mining method according to claim 1, characterized in that: the refrigeration chamber 4 is positioned on the coal wall on the non-recovery side of the roadway, the distance between the freezing drill hole 5 and the coal wall on the non-recovery side is 150mm, and the drill hole is vertically drilled.
3. The coal seam floor high pressure bearing water freezing method outburst prevention mining method according to claim 1, characterized in that: the active freezing temperature of the freezing drill hole 5 is-28 ℃ to-30 ℃, the freezing time is not less than 35d, and the freezing temperature is maintained to be-22 ℃ to-25 ℃.
4. The coal seam floor high pressure bearing water freezing method outburst prevention mining method according to claim 1, characterized in that: when the bottom plate of the mining area contains high-pressure water, the stoping roadway 2 and the roadway of the mining area corresponding to the working face 1 need to be constructed with the freezing drill holes 5, namely, the freezing curtain 6 constructed by the freezing drill holes 5 is required to surround the boundary of the whole mining area, and after freezing is finished, a pumping and drainage system is arranged to pump the high-pressure water 8 of the bottom plate of the coal bed in the mining area, so that the drainage channel of the pressure water to the mining area is blocked.
5. The coal seam floor high pressure bearing water freezing method outburst prevention mining method according to claim 1, characterized in that: when high pressure water is distributed in a part of areas of the bottom plate of the mining area, only frozen drill holes 5 need to be constructed at the positions where the high pressure water 8 of the bottom plate of the coal seam intersects with the boundary of the mining area, a frozen curtain 6 is constructed, and after freezing is finished, a pumping and discharging system is arranged to pump the high pressure water 8 of the bottom plate of the coal seam in the mining area, so that underground water is prevented from being discharged into the mining area.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114352287A (en) * | 2021-12-17 | 2022-04-15 | 贵州盘江煤电集团技术研究院有限公司 | Water prevention and control method for coal mining working face of coal mine |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107152309A (en) * | 2017-07-19 | 2017-09-12 | 中国矿业大学 | A kind of coal seam is the high water level and high-speed drainage water damage prevention and controls of Main aquifer |
| CN107740707A (en) * | 2017-08-13 | 2018-02-27 | 煤炭科学技术研究院有限公司 | Thick coal-layer mining water damage prevention and controls under a kind of deep high artesian |
| CN109139011A (en) * | 2018-08-02 | 2019-01-04 | 缪协兴 | A kind of coal seam is the waterproof coal-mining method of Main aquifer |
| CN109577980A (en) * | 2018-11-06 | 2019-04-05 | 中国矿业大学 | A kind of underground longwall working face water-protection coal-mining method freezed based on water-bearing layer |
| CN110761791A (en) * | 2019-11-15 | 2020-02-07 | 太原理工大学 | Method for upward repeated mining of hollow coal seam by accumulated water among coal pillars in freezing cutter pillar type residual mining area |
| CN110847955A (en) * | 2019-11-15 | 2020-02-28 | 太原理工大学 | Method for upward repeated mining of empty coal seam by freezing accumulated water in room-and-column-type residual mining area |
-
2021
- 2021-03-22 CN CN202110303828.4A patent/CN112832769B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107152309A (en) * | 2017-07-19 | 2017-09-12 | 中国矿业大学 | A kind of coal seam is the high water level and high-speed drainage water damage prevention and controls of Main aquifer |
| CN107740707A (en) * | 2017-08-13 | 2018-02-27 | 煤炭科学技术研究院有限公司 | Thick coal-layer mining water damage prevention and controls under a kind of deep high artesian |
| CN109139011A (en) * | 2018-08-02 | 2019-01-04 | 缪协兴 | A kind of coal seam is the waterproof coal-mining method of Main aquifer |
| CN109577980A (en) * | 2018-11-06 | 2019-04-05 | 中国矿业大学 | A kind of underground longwall working face water-protection coal-mining method freezed based on water-bearing layer |
| CN110761791A (en) * | 2019-11-15 | 2020-02-07 | 太原理工大学 | Method for upward repeated mining of hollow coal seam by accumulated water among coal pillars in freezing cutter pillar type residual mining area |
| CN110847955A (en) * | 2019-11-15 | 2020-02-28 | 太原理工大学 | Method for upward repeated mining of empty coal seam by freezing accumulated water in room-and-column-type residual mining area |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114352287A (en) * | 2021-12-17 | 2022-04-15 | 贵州盘江煤电集团技术研究院有限公司 | Water prevention and control method for coal mining working face of coal mine |
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