CN109577980A - A kind of underground longwall working face water-protection coal-mining method freezed based on water-bearing layer - Google Patents
A kind of underground longwall working face water-protection coal-mining method freezed based on water-bearing layer Download PDFInfo
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- CN109577980A CN109577980A CN201811313217.2A CN201811313217A CN109577980A CN 109577980 A CN109577980 A CN 109577980A CN 201811313217 A CN201811313217 A CN 201811313217A CN 109577980 A CN109577980 A CN 109577980A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 77
- 238000005065 mining Methods 0.000 title claims abstract description 38
- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000007710 freezing Methods 0.000 claims abstract description 37
- 230000008014 freezing Effects 0.000 claims abstract description 34
- 238000010257 thawing Methods 0.000 claims abstract description 8
- 230000004888 barrier function Effects 0.000 claims description 6
- 239000011435 rock Substances 0.000 claims description 4
- 238000004540 process dynamic Methods 0.000 claims 1
- 239000003245 coal Substances 0.000 abstract description 13
- 238000004519 manufacturing process Methods 0.000 abstract description 10
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 238000000605 extraction Methods 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 description 5
- 238000011084 recovery Methods 0.000 description 3
- 238000006424 Flood reaction Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000003610 charcoal Substances 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 238000010327 methods by industry Methods 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 150000003839 salts Chemical group 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 230000001932 seasonal effect Effects 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000005413 snowmelt Substances 0.000 description 1
- 238000004162 soil erosion Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK 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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- Life Sciences & Earth Sciences (AREA)
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- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The invention discloses a kind of underground longwall working face water-protection coal-mining methods freezed based on water-bearing layer, this method considers overlying strata moving characteristic in mining active process, by the spatial position in target water-bearing layer, working face mining size, buried depth and mining subsidence parameter, the parameters such as position, thickness and the freeze-off time of preceding water-bearing layer freezing curtain are adopted in determination；The back production of working face is carried out after freezing curtain is formed；Working face extraction, which finishes to carry out thawing after a certain period of time, restores the property of water-bearing in water-bearing layer.This method is simple and easy, and design is rationally, it can be achieved that the safe and efficient coal mining based on fwaater resources protection, reaches resource exploitation and mutually coordinate with ecological environmental protection.
Description
Technical field
The present invention relates to the water retaining mining methods under a kind of underground mine loose aquifer, and in particular to one kind is based on aqueous
The underground longwall working face water-protection coal-mining method that layer freezes, belongs to coal underground mining technologies field.
Background technique
With the continuous promotion of coal resources in China strategic shift and production technique level, coal production present it is extensive,
High-intensitive exploitation pattern.However, the protection for ignoring water resource be easy to cause a series of ecologies such as soil erosion, desertification of land
Environmental degradation problem, and the restoration of the ecosystem after destroying is often at high cost and difficulty is big.Under the new normality of coal industry development, " coal
Charcoal production model must be turned into safe and efficient, intelligence, lasting exploit ", during coal exploitation, it is necessary to be held with water resource
One of constrained based on load power, by taking effective Water-retaining Measure in recovery process to guarantee safely and efficiently to exploit.
Many benefit our pursuits has been carried out to water retaining mining method both at home and abroad at present.Chief technology are as follows: (1) limit for height or
Separate zone production technology, to reduce water flowing fractured zone development height；(2) the partial minings method such as Striping noise or room and pillar mining,
By staying pillar overlying strata to weaken mining influence；(3) mode of goaf filling come reduce overlying strata migration space；(4) it is infusing
Drainage underground water is exploited again in slurry curtain, prevents and treats floods from a safety viewpoint, but after causing the loss of water resource and adopting
Water-bearing layer loses aqueous function.These technologies or there are resource recovery is low or production efficiency is low or water resource has part and flows
The problems such as mistake.For western Large-scale Coal base, how to realize that the high-recovery based on fwaater resources protection, high-efficiency mining are
Coal industry urgent problem to be solved.
Summary of the invention
In order to overcome various deficiencies of the existing technology, the present invention provides a kind of underground longwall freezed based on water-bearing layer
Working face water-protection coal-mining method, while considering overlying strata moving characteristic in mining active process can effectively obstruct periphery underground water to opening
It adopts range to pour in, reduces the use of structures during water conservation, be conducive to resuming work after back production, guarantee actual mining
Progress.
To solve the above-mentioned problems, a kind of underground longwall working face water protection mining side freezed based on water-bearing layer of the present invention
Method, while considering overlying strata moving characteristic in mining active process, comprising the following steps:
The first step obtains the hydrogeological information within the scope of target operation face and is based on overlying strata moving characteristic in mining active process
Engineering technical parameters, hydrogeological information includes: the spatial position of target aquifer and aquifuge, the benefit in target water-bearing layer
It gives, runoff and Output information；Engineering technical parameters include: face length L, the traveling angle δ in basement rock across pitch direction, the side of going up a hill
To traveling angle γ, direction traveling angle β of going down the hill, center of working face line, working face upper end, working face lower end and water-bearing layer bottom edge
Boundary's vertical range is respectively H, H1、H2；
Second step, according to the geological information and technical parameter in the first step, determine the frozen position in target water-bearing layer: work
On the direction of propulsion of face, freezing curtain cuts a horizontal distance apart from open-off cut or receiptsOn the direction of multiple operation face, freeze
Curtain and working face upper end horizontal distanceFreezing curtain and working face lower end horizontal distance
Third step, the frozen position in the target water-bearing layer, arrangement freezing hole form freezing curtain；
4th step starts to carry out stoping operation within the scope of target operation face after freezing curtain is formed；
5th step, the thawing time that target water-bearing layer is determined according to the geological information and technical parameter that determine in the first step,
Then it thaws；Restore aquifer recharge after defrosting, runoff conditions are restored automatically.
Further, the diameter of freezing hole is 150mm, freezes 1.2~1.5m of pitch of holes, curtain width 0.5 in third step
~1.5m, and the whole hole of freezing hole is deep into the depth inside water barrier and should be greater than at 1/4~1/3 position of water-bearing layer thickness,
Temperature maintains -30 DEG C~-35 DEG C, first freeze-off time is in 48h or more.
Further, in exploiting field n-th of working face adjacentIt thaws, adopts after a working face mining
The working face finally exploited in area thaws after 3 months.
Further, to aquifer water in working face and working face coverage while the 4th step carries out stoping operation
Position is monitored.
Compared with prior art, the present invention its progress is: (1) underground water for freezing water-protection coal-mining method according to mine
Preservation situation, freezes water-bearing layer in limit of mining, freezes wall to be formed or freezes ring layer, makes to adopt rear underground
Water energy is enough to be restored rapidly to previous level, water conservation and surface environment；(2) compared to the prior art, this method
Reduce the use of structures in water conservation, conducive to resuming work after back production is realized, greatly reduces exploitation to underground water
It influences；(3) this method work progress will not interfere the normal activity of mine, guarantee the job schedule of back production；(4)
It especially in extremely frigid zones, can carry out freezing rear back production in winter, summer thaw and water-bearing layer functional rehabilitation, freezes efficiency
Height, and the runoff to water resource, Escape condition and to ecology disturbance it is small.
Detailed description of the invention
Fig. 1 is to freeze arrangement schematic diagram within the scope of coal mining working face of the present invention；
Fig. 2 is to freeze to arrange A-A to section above coal mining working face open-off cut eye in Fig. 1；
In figure: 1, freezing curtain；2, freezing hole；3, working face；4, the contour of water table；5, water-bearing layer；6, water barrier；7, coal
Layer.
Specific embodiment
The present invention is described in detail in the following with reference to the drawings and specific embodiments.
As depicted in figs. 1 and 2, a kind of underground longwall working face water-protection coal-mining method freezed based on water-bearing layer, is examined simultaneously
Consider overlying strata moving characteristic in mining active process, comprising the following steps:
The first step obtains the hydrogeology within the scope of target operation face and the work based on overlying strata moving characteristic in mining active process
Journey technical parameter, hydrogeology include: the spatial position in target water-bearing layer 5 and water barrier 6, the supply in target water-bearing layer 5, runoff
And Output information；Engineering technical parameters include: 3 length L of working face, the traveling angle δ in basement rock across pitch direction, and direction of going up a hill is mobile
Angle γ, direction traveling angle β of going down the hill, 3 center line of working face, 3 upper end of working face, 3 lower end of working face and water-bearing layer bottom boundaries
Vertical range is respectively H, H1、H2；4 it is the contour of water table, 7 is coal seam；
Second step, according to the geological information and technical parameter in the first step, determine the frozen position in target water-bearing layer: work
On the direction of propulsion of face, freezing curtain 1 cuts a horizontal distance apart from open-off cut or receiptsOn 3 direction of multiple operation face, freeze
Tie curtain 1 and 3 upper end horizontal distance of working faceFreezing curtain 1 and 3 lower end horizontal distance of working face
As shown in Fig. 2, third step, the frozen position in the target water-bearing layer 5, arrangement freezing hole 2 forms freezing curtain
1；
4th step starts to carry out stoping operation within the scope of target operation face after the formation of freezing curtain 1；
5th step, the thawing time that target water-bearing layer is determined according to the geological information and technical parameter that determine in the first step,
Then it thaws；Restore aquifer recharge after defrosting, runoff conditions are restored automatically.
Further, the diameter of freezing hole 2 is 150mm, 2 1.2~1.5m of spacing of freezing hole, curtain width in third step
0.5~1.5m, and the whole hole of freezing hole 2 is deep into the depth inside water barrier should be greater than 1/4~1/3 position of water-bearing layer thickness
Place, temperature maintains -30 DEG C~-35 DEG C, first freeze-off time is in 48h or more.
Further, in exploiting field n-th of working face adjacentIt thaws, adopts after a working face mining
The working face finally exploited in area thaws after 3 months.
Further, to aquifer water in working face and working face coverage while the 4th step carries out stoping operation
Position is monitored.
The present invention is explained in detail with specific embodiment below.
By taking NW China mine as an example, the first step obtains hydrogeological information within the scope of target operation face and based on adopting
The Engineering technical parameters of overlying strata moving characteristic, water-bearing layer are located at the fourth season loose sand bed lower part during dynamic, are glutenite gap
Water-bearing layer, water-bearing layer thickness are averaged 12m, and watery is medium on the weak side, predominantly seasonal natural snowmelt runoff supply, no earth's surface diameter
Stream and water body, for relatively independent, closing, the geohydrologic unit of generally poor-water；Engineering technical parameters: face length
120m, mining height 5m, traveling angle δ=73 ° in basement rock across pitch direction, direction traveling angle γ=69 ° of going up a hill, direction traveling angle of going down the hill
β=72 °, center of working face line, working face upper end, working face lower end and water-bearing layer bottom boundaries vertical range are respectively H=
158m、H1=122m, H2=176m；
Second step determines the frozen position in target water-bearing layer according to the geological information and technical parameter in the first step: work
On the direction of propulsion of face, freezing curtain cuts a horizontal distance apart from open-off cut or receiptsIn parallel
On working face direction, freezing curtain and working face upper end horizontal distanceFreezing curtain
With with working face lower end horizontal distance
Third step, the frozen position in the target water-bearing layer, arrangement freezing hole form freezing curtain: at frozen position,
Freezing hole group that diameter is 150mm is arranged, freezes pitch of holes is 1.5m, 0.5~1.5m of curtain width, freezing hole bottom end are deep into
The position of 5m inside water barrier, cooling medium is salt water in freezing hole, and temperature maintains -30 DEG C~-35 DEG C, first freeze-off time
In 48h or more；
4th step starts to carry out stoping operation within the scope of target operation face after freezing curtain is formed, while to work
Water-bearing layer water level is monitored in face and working face coverage；
5th step, working face thaw after should sequentially taking over third working face extraction thereafter, last in exploiting field
One working face of exploitation thaws after three months；Restore aquifer recharge after defrosting, runoff conditions are restored automatically.
Claims (4)
1. a kind of underground longwall working face water-protection coal-mining method freezed based on water-bearing layer, while considering that overlying strata move in mining active process
Dynamic feature, which comprises the following steps:
The first step obtains the hydrogeological information within the scope of target operation face and the work based on overlying strata moving characteristic in mining active process
Journey technical parameter, hydrogeological information include: the spatial position of target aquifer and aquifuge, the supply in target water-bearing layer, diameter
Stream and Output information；Engineering technical parameters include: face length L, the traveling angle δ in basement rock across pitch direction, direction shifting of going up a hill
Dynamic angle γ, direction traveling angle β of going down the hill, center of working face line, working face upper end, working face lower end and water-bearing layer bottom boundaries are hung down
Straight distance is respectively H, H1、H2；
Second step, according to the geological information and technical parameter in the first step, determine the frozen position in target water-bearing layer；
Third step, the frozen position in the target water-bearing layer, arrangement freezing hole form freezing curtain, wherein the diameter of freezing hole
For 150mm, freeze 1.2~1.5m of pitch of holes, 0.5~1.5m of curtain width；
4th step starts to carry out stoping operation within the scope of target operation face after freezing curtain is formed；
5th step, the thawing time that target water-bearing layer is determined according to the geological information and technical parameter that determine in the first step, then
It thaws；Restore aquifer recharge after defrosting, runoff conditions are restored automatically.
2. the underground longwall working face water-protection coal-mining method according to claim 1 freezed based on water-bearing layer, feature are existed
In the frozen position in target water-bearing layer in second step are as follows: on advance of the face direction, freezing curtain cuts eye apart from open-off cut or receipts
Horizontal distanceOn the direction of multiple operation face, freezing curtain and working face upper end horizontal distanceFreeze
Curtain and working face lower end horizontal distance
3. the underground longwall working face water-protection coal-mining method according to claim 1 freezed based on water-bearing layer, feature are existed
In the whole hole of freezing hole, which is deep into the depth inside water barrier, in third step should be greater than 1/4~1/3 position of water-bearing layer thickness
Place, temperature maintains -30 DEG C~-35 DEG C, first freeze-off time is in 48h or more.
4. the underground longwall working face water-protection coal-mining method according to claim 1 freezed based on water-bearing layer, feature are existed
In target water-bearing layer thaws opportunity in the 5th step are as follows: n-th of working face is adjacent in exploiting fieldA working face mining is complete
It thaws after finishing, finally exploit in exploiting field a working face thaws after 3 months.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811313217.2A CN109577980B (en) | 2018-11-06 | 2018-11-06 | Underground longwall working face water-retaining coal mining method based on aquifer freezing |
| PCT/CN2019/108477 WO2020093813A1 (en) | 2018-11-06 | 2019-09-27 | Frozen aquifer-based method for underground longwall face coal mining under water-containing condition |
| AU2019376347A AU2019376347B2 (en) | 2018-11-06 | 2019-09-27 | A method for coal mining based on frozen aquifer for underground longwall face under water-conservation condition |
| ZA2021/02741A ZA202102741B (en) | 2018-11-06 | 2021-04-23 | Frozen aquifer-based method for underground longwall face coal mining under water-containing condition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811313217.2A CN109577980B (en) | 2018-11-06 | 2018-11-06 | Underground longwall working face water-retaining coal mining method based on aquifer freezing |
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| Publication Number | Publication Date |
|---|---|
| CN109577980A true CN109577980A (en) | 2019-04-05 |
| CN109577980B CN109577980B (en) | 2020-09-04 |
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| CN201811313217.2A Active CN109577980B (en) | 2018-11-06 | 2018-11-06 | Underground longwall working face water-retaining coal mining method based on aquifer freezing |
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| Country | Link |
|---|---|
| CN (1) | CN109577980B (en) |
| AU (1) | AU2019376347B2 (en) |
| WO (1) | WO2020093813A1 (en) |
| ZA (1) | ZA202102741B (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110159267A (en) * | 2019-04-18 | 2019-08-23 | 中国矿业大学 | A kind of water-bearing layer segmenting slip casting curtain water retaining mining method |
| CN110749533A (en) * | 2019-10-31 | 2020-02-04 | 中国矿业大学 | Water-retention coal mining discrimination method based on equivalent water-resisting layer thickness |
| WO2020093813A1 (en) * | 2018-11-06 | 2020-05-14 | 中国矿业大学 | Frozen aquifer-based method for underground longwall face coal mining under water-containing condition |
| CN112832769A (en) * | 2021-03-22 | 2021-05-25 | 中国矿业大学 | Outburst prevention mining method of coal seam floor high-pressure-bearing water freezing method |
| CN113006871A (en) * | 2021-02-03 | 2021-06-22 | 淮北矿业股份有限公司 | Dynamic stability monitoring and early warning method for underground deep-buried curtain |
| CN113063709A (en) * | 2021-02-03 | 2021-07-02 | 中煤科工集团西安研究院有限公司 | Method for determining curtain under complex aquifer condition |
| CN114086955A (en) * | 2020-08-24 | 2022-02-25 | 神华神东煤炭集团有限责任公司 | Water-retention mining method for shallow coal seam and application thereof |
| 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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|---|---|---|---|---|
| CN113434819B (en) * | 2021-06-24 | 2023-08-01 | 中国矿业大学 | Method for determining influence time and distance of working face mining on goaf mining vibration activities |
| CN115977650A (en) * | 2022-11-22 | 2023-04-18 | 安徽理工大学 | Communication freezing system based on plane skew connection channel and construction method thereof |
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| CN109577980B (en) * | 2018-11-06 | 2020-09-04 | 中国矿业大学 | Underground longwall working face water-retaining coal mining method based on aquifer freezing |
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- 2019-09-27 WO PCT/CN2019/108477 patent/WO2020093813A1/en active Application Filing
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| SU1763660A1 (en) * | 1980-05-14 | 1992-09-23 | В.Н.Канистеров, П.К.Кучеба, Ф.М.Киржнер, А.В.Пшеченко и Л.М.Смирнов | Method of working thick spontaneously combustible coal beds |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020093813A1 (en) * | 2018-11-06 | 2020-05-14 | 中国矿业大学 | Frozen aquifer-based method for underground longwall face coal mining under water-containing condition |
| CN110159267A (en) * | 2019-04-18 | 2019-08-23 | 中国矿业大学 | A kind of water-bearing layer segmenting slip casting curtain water retaining mining method |
| CN110159267B (en) * | 2019-04-18 | 2020-06-02 | 中国矿业大学 | Water-bearing stratum sectional grouting curtain water-retention mining method |
| WO2020211298A1 (en) * | 2019-04-18 | 2020-10-22 | 中国矿业大学 | Water-conserving mining method employing segmented grout curtain for aquifer |
| CN110749533A (en) * | 2019-10-31 | 2020-02-04 | 中国矿业大学 | Water-retention coal mining discrimination method based on equivalent water-resisting layer thickness |
| CN114086955A (en) * | 2020-08-24 | 2022-02-25 | 神华神东煤炭集团有限责任公司 | Water-retention mining method for shallow coal seam and application thereof |
| CN113006871A (en) * | 2021-02-03 | 2021-06-22 | 淮北矿业股份有限公司 | Dynamic stability monitoring and early warning method for underground deep-buried curtain |
| CN113063709A (en) * | 2021-02-03 | 2021-07-02 | 中煤科工集团西安研究院有限公司 | Method for determining curtain under complex aquifer condition |
| CN113063709B (en) * | 2021-02-03 | 2023-06-30 | 中煤科工集团西安研究院有限公司 | Method for determining curtain under complex aquifer condition |
| CN113006871B (en) * | 2021-02-03 | 2024-01-30 | 淮北矿业股份有限公司 | Dynamic stability monitoring and early warning method for underground deep-buried curtain |
| CN112832769A (en) * | 2021-03-22 | 2021-05-25 | 中国矿业大学 | Outburst prevention mining method of coal seam floor high-pressure-bearing water freezing method |
| 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 |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| AU2019376347A1 (en) | 2021-05-06 |
| ZA202102741B (en) | 2022-10-26 |
| WO2020093813A1 (en) | 2020-05-14 |
| CN109577980B (en) | 2020-09-04 |
| AU2019376347B2 (en) | 2022-03-24 |
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