CN101029577A - Method for extracting released-gas of protected coal-bedding under unstabilized thin coal bedding set condition - Google Patents
Method for extracting released-gas of protected coal-bedding under unstabilized thin coal bedding set condition Download PDFInfo
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- CN101029577A CN101029577A CN 200710021163 CN200710021163A CN101029577A CN 101029577 A CN101029577 A CN 101029577A CN 200710021163 CN200710021163 CN 200710021163 CN 200710021163 A CN200710021163 A CN 200710021163A CN 101029577 A CN101029577 A CN 101029577A
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- work plane
- pressure relief
- seam
- gas pumping
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- 239000003245 coal Substances 0.000 title claims abstract description 59
- 238000000034 method Methods 0.000 title claims description 17
- 238000000605 extraction Methods 0.000 claims abstract description 19
- 238000005065 mining Methods 0.000 claims description 47
- 238000005086 pumping Methods 0.000 claims description 40
- 238000010276 construction Methods 0.000 claims description 12
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 6
- 238000005553 drilling Methods 0.000 claims description 4
- 238000009434 installation Methods 0.000 claims description 3
- 238000011084 recovery Methods 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims description 2
- 230000007423 decrease Effects 0.000 abstract 1
- 241000195493 Cryptophyta Species 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Abstract
This is a gas extraction method for complex coal beds. By gas extraction from a burst coal bed decreases the pressure and gas concentration, so turns the high burst bed to low gas burst one.
Description
Technical field
The present invention relates to the pressure relief gas pumping mining method of protected coal seam under the unstable girdle set condition, be particularly useful for the exploitation that there is unstable girdle group in the protected coal seam top.
Background technology
The topping production technique be facts have proved it is the outstanding measure of effective, the most reliable a kind of control coal and gas, in the Huainan, many mining areas such as the Huaibei, loose algae, the self-sufficient and strategically located region, Yangquan and Shenyang have obtained application, have obtained good protrusion-dispelling effect.But increase along with the pit mining degree of depth; coal-bed gas pressure and content strengthen gradually; many non-projecting coal bed toppings change into projecting coal bed; tax is deposited stable main mining coal seam and can be done the fewer and feweri of topping in the mining area; by exploitation one deck coal often can't the complete preservation protected coal seam production zone, can't realize the zonal pressure relief gas pumping mining of protected coal seam.
Summary of the invention
Problem at the prior art existence; the pressure relief gas pumping mining method that the purpose of this invention is to provide protected coal seam under a kind of unstable girdle set condition; but combination by each territory, unstable girdle exploiting field; realize the projecting coal bed pressure relief gas pumping mining of protected seam; effectively reduce coal seam gas-bearing capacity, eliminate projecting coal bed outburst danger.
The pressure relief gas pumping mining method of protected coal seam under the unstable girdle set condition of the present invention:
But a. determine the production zone of each unstable girdle according to geologic information;
B. determine the limit of mining of unstable girdle topping work plane and protected work plane, stay between each topping work plane to establish and press stubble, guarantee that each topping work plane can satisfy the continuous unloading pressure protection requirement of protected seam;
C. carry out the preparation of topping working face mining, carry out conventional protected seam work plane pressure relief gas pumping mining engineering simultaneously;
D. carry out the topping working face mining with low seam mining machinery or coal plough, the gas pressure relief of the protected seam of extraction simultaneously work plane;
E. the outburst hazard checking is carried out in protected seam work plane coal seam, gas remainder quantity drops to 8m when the coal seam
3/ t is following or remaining gas pressure drops to below the 0.74MPa, stops extraction, otherwise continues extraction, until reaching requirement.
The leading at least section of protected seam work plane of topping work plane across strike direction exploitation; In the topping recovery process, the face gas outburst amount is greater than 5m
3During/min, need gas pumping is carried out in topping work, to guarantee exploitation safety; The pressure relief gas pumping mining of protected seam work plane is not less than one-year age; When craven fault appears in the topping work plane, should push away nonvoluntary reserved coal pillar by force; The pressure relief gas pumping mining engineering begins the exploitation of topping work plane after finishing again; Protected seam work plane pressure relief gas pumping mining engineering comprises floor roadway construction, drill site construction, drilling construction, sealing of hole and the installation of extraction pipeline; Apart from seat earth 15～20m, be positioned at the middle part of protected seam work plane on the tendency on the floor roadway; Boring is fan-shaped layout in drill site, is as the criterion with thick face in the coal seam, and the spacing of wells 15～20m, bore diameter 90mm, in the perforate of drill site top board, the whole hole of holing enters roof 0.5m.
This method is at the mining area of no stabilized protection course exploitation; can stablize minable coal seam in nothing and make to realize under the condition of topping projecting coal bed pressure relief gas pumping mining; but by exploiting the territory, exploiting field of each unstable girdle, form new topping, the outburst danger zone in protection coal seam.By projecting coal bed pressure relief gas pumping mining, can effectively reduce projecting coal bed gas bearing capacity and pressure, do not have the projecting coal bed present low gas that is converted into of high gas projecting coal bed, the pre-pumping rate of projecting coal bed face gas is reached more than 60%, coal seam gas-bearing capacity can drop to 8m
3Following or the coal-bed gas pressure of/t drops to below the 0.74MPa, thoroughly eliminates the outburst hazard in coal seam, realizes driving safely and fast and efficiently back production that coal and gas are projecting coal bed.Projecting coal bed roadway workface adopts comprehensive mechanization to tunnel continuously, and tunnelling speed is brought up to 200m/ more than the month by original 60m/ month; Projecting coal bed work plane coal daily output is brought up to more than the 3000t/d by original 1000t/d; Projecting coal bed face upper corner angle gas density can be controlled in below 0.8%, and the return gas density can be controlled in below 0.5%.
The specific embodiment
The pressure relief gas pumping mining method of protected coal seam under the unstable girdle set condition of the present invention:
1), forms the production system and the gas pumping system of irregular coal seam in advance according to the digging requirement.
2) design of topping work plane, each topping work plane design should be able to be satisfied the continuous unloading pressure protection requirement of protected seam, avoids occurring on the protected seam work plane not protection zone; Should leave according to the coal petrography geologic feature between each topping work plane and enough press stubble, in order to avoid cause stress to concentrate.
In combined protection layer recovery process, the work plane the next layer gas is gushed out bigger, needs to adopt effective gas pumping method, guarantees the safe working of topping work plane.
The topping work plane should select for use low seam mining machinery or coal plough to exploit.Meet structures such as craven fault at the topping work plane, should push away nonvoluntary reserved coal pillar by force.
3) protected seam pressure relief gas pumping mining design, pressure relief gas pumping mining design comprise floor roadway design, drill site design, boring design, sealing of hole design and extraction parameter designing.
Apart from seat earth 15～20m, be positioned at the middle part of protected seam work plane on the tendency on the floor roadway, not occurring with extraction borehole is principle to the hole down; Upper and lower section floor roadway is by the border connection of going up a hill, and forms full exhaust ventilation system; Drift section 6～8m
2
Drill site vertical base plate rock gangway horizontal arrangement, drill site spacing are that 30～40m, section are 6～8m
2, long be 5m.
Boring is fan-shaped layout in drill site, the spacing that boring is as the criterion with thick face in the coal seam is that 15～20m, bore diameter are 90mm, and in the perforate of drill site top board, the whole hole of holing enters roof 0.5m.
Sealing of hole immediately after drilling construction is finished, sealing material is a cement paste, sealed borehole length is not less than 8m, hole sealing tube length 10m, diameter 40mm.
Floor roadway extraction pipeline extraction amount is not less than 30m
3/ min, the aperture negative pressure is not less than 20KPa, and the extraction time was not less than 1 year.
4) gas pumping engineering construction: the gas pumping engineering of topping should be able to satisfy the safe working requirement of topping work plane; Protected seam pressure relief gas pumping mining engineering comprises floor roadway construction, drill site construction, drilling construction, sealing of hole and the installation of extraction pipeline.According to design and construction pressure relief gas pumping mining engineering, satisfy the extraction requirement of protected seam gas pressure relief; Construct the in advance pressure relief gas pumping mining engineering of protected seam, the effective gas pressure relief of extraction protected seam when guaranteeing the topping exploitation.
5) pressure relief gas pumping mining: the face under-study plan of rationally arranging work; the topping work plane is wanted 1～2 section of leading protected seam work plane on tendency; guarantee the enough protected seam work plane pressure relief gas pumping mining time; reduce the gas bearing capacity of protected seam work plane, realize the evenly effectively extraction of coal-bed gas.
6) eliminate the outburst hazard checking: by being no less than the gas pumping of 1 year, the gas remainder quantity of protected work plane is reduced to 8m
3Following or the remaining gas pressure of/t should be reduced to below the 0.74MPa, can confirm as the elimination outburst danger.
7) protected seam working face mining: the protected seam work plane can carry out digging operation by no outburst danger coal seam in protection domain, carries out in strict accordance with " quaternity " outburst prevention measures outside protection domain.
Claims (8)
1. the pressure relief gas pumping mining method of protected coal seam under the unstable girdle set condition is characterized in that:
But a. determine the production zone of each unstable girdle according to geologic information;
B. determine the limit of mining of unstable girdle topping work plane and protected work plane, stay between each topping work plane to establish and press stubble, guarantee that each topping work plane can satisfy the continuous unloading pressure protection requirement of protected seam;
C. carry out the preparation of topping working face mining, carry out conventional protected seam work plane pressure relief gas pumping mining engineering simultaneously;
D. carry out the topping working face mining with low seam mining machinery or coal plough, the gas pressure relief of the protected seam of extraction simultaneously work plane;
E. the outburst hazard checking is carried out in protected seam work plane coal seam, gas remainder quantity drops to 8m when the coal seam
3/ t is following or remaining gas pressure drops to below the 0.74MPa, stops extraction, otherwise continues extraction, until reaching requirement.
2. the pressure relief gas pumping mining method of protected coal seam under the unstable girdle set condition according to claim 1 is characterized in that: the leading at least section of protected seam work plane of topping work plane across strike direction exploitation.
3. the pressure relief gas pumping mining method of protected coal seam under the unstable girdle set condition according to claim 1, it is characterized in that: in the topping recovery process, the face gas outburst amount is greater than 5m
3During/min, need gas pumping is carried out in topping work, to guarantee exploitation safety.
4. the pressure relief gas pumping mining method of protected coal seam under the unstable girdle set condition according to claim 1, it is characterized in that: the pressure relief gas pumping mining of protected seam work plane is not less than one-year age.
5. the pressure relief gas pumping mining method of protected coal seam under the unstable girdle set condition according to claim 1 is characterized in that: when craven fault appears in the topping work plane, should push away nonvoluntary reserved coal pillar by force.
6. the pressure relief gas pumping mining method of protected coal seam under the unstable girdle set condition according to claim 1 is characterized in that: the pressure relief gas pumping mining engineering begins the exploitation of topping work plane after finishing again.
7. the pressure relief gas pumping mining method of protected coal seam under the unstable girdle set condition according to claim 1 is characterized in that: protected seam work plane pressure relief gas pumping mining engineering comprises floor roadway construction, drill site construction, drilling construction, sealing of hole and the installation of extraction pipeline.
8. the pressure relief gas pumping mining method of protected coal seam under the unstable girdle set condition according to claim 7 is characterized in that: apart from seat earth 15～20m, be positioned at the middle part of protected seam work plane on the tendency on the floor roadway; Boring is fan-shaped layout in drill site, is as the criterion with thick face in the coal seam, and the spacing of wells 15～20m, bore diameter 90mm, in the perforate of drill site top board, the whole hole of holing enters roof 0.5m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100211638A CN100535396C (en) | 2007-04-02 | 2007-04-02 | Method for extracting released-gas of protected coal-bedding under unstabilized thin coal bedding set condition |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100211638A CN100535396C (en) | 2007-04-02 | 2007-04-02 | Method for extracting released-gas of protected coal-bedding under unstabilized thin coal bedding set condition |
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| Publication Number | Publication Date |
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| CN101029577A true CN101029577A (en) | 2007-09-05 |
| CN100535396C CN100535396C (en) | 2009-09-02 |
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| CNB2007100211638A Expired - Fee Related CN100535396C (en) | 2007-04-02 | 2007-04-02 | Method for extracting released-gas of protected coal-bedding under unstabilized thin coal bedding set condition |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101975064A (en) * | 2010-10-21 | 2011-02-16 | 中南大学 | Mechanical continuous mining method for gently inclined thin ore body |
| CN101649740B (en) * | 2009-09-03 | 2011-08-31 | 周福宝 | Ground bored well body structure for gas extraction |
| CN103016049A (en) * | 2012-12-24 | 2013-04-03 | 大同煤矿集团有限责任公司 | Comprehensive treatment method of gas on firstly mined permian system working face |
| CN103696801A (en) * | 2013-12-20 | 2014-04-02 | 安徽理工大学 | Method for testing surface borehole pressure relief gas drainage range |
| CN105422097A (en) * | 2016-01-05 | 2016-03-23 | 淮南矿业(集团)有限责任公司 | Coal seam group mining method |
| CN105507903A (en) * | 2015-12-15 | 2016-04-20 | 中国矿业大学 | Coal-rock simultaneous production protecting seam and protected seam collaborative mining method |
| CN106677781A (en) * | 2017-01-25 | 2017-05-17 | 中国矿业大学 | Pressure-relieving and permeability-increasing method for drilling exploitation of ultra-thin coal seam |
| CN107905832A (en) * | 2017-11-06 | 2018-04-13 | 北京九尊能源技术股份有限公司 | The outburst elimination method of pump drainage is combined on a kind of nitrogen pressure break and ground with underground |
| CN112228142A (en) * | 2020-09-09 | 2021-01-15 | 郑成立 | Slow-dip coal seam roadway design and adjacent layer and goaf gas extraction method |
| CN113653491A (en) * | 2021-10-21 | 2021-11-16 | 煤炭科学研究总院 | Underground rock burst prevention and control method for coal seam group |
| CN116575973A (en) * | 2023-07-07 | 2023-08-11 | 山西凯嘉能源集团有限公司 | Method for controlling stope gas of working face under surrounding rock gas outburst condition |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1313702C (en) * | 2005-06-02 | 2007-05-02 | 淮南矿业(集团)有限责任公司 | Gas pressure relief method of ground drilling extraction minery and goaf |
-
2007
- 2007-04-02 CN CNB2007100211638A patent/CN100535396C/en not_active Expired - Fee Related
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101649740B (en) * | 2009-09-03 | 2011-08-31 | 周福宝 | Ground bored well body structure for gas extraction |
| CN101975064B (en) * | 2010-10-21 | 2012-11-07 | 中南大学 | Mechanical continuous mining method for gently inclined thin ore body |
| CN101975064A (en) * | 2010-10-21 | 2011-02-16 | 中南大学 | Mechanical continuous mining method for gently inclined thin ore body |
| CN103016049A (en) * | 2012-12-24 | 2013-04-03 | 大同煤矿集团有限责任公司 | Comprehensive treatment method of gas on firstly mined permian system working face |
| CN103016049B (en) * | 2012-12-24 | 2014-12-17 | 大同煤矿集团有限责任公司 | Comprehensive treatment method of gas on firstly mined permian system working face |
| CN103696801A (en) * | 2013-12-20 | 2014-04-02 | 安徽理工大学 | Method for testing surface borehole pressure relief gas drainage range |
| CN105507903B (en) * | 2015-12-15 | 2018-01-02 | 中国矿业大学 | Adopt protective layer cooperates with recovery method to a kind of coal petrography with protected seam together |
| CN105507903A (en) * | 2015-12-15 | 2016-04-20 | 中国矿业大学 | Coal-rock simultaneous production protecting seam and protected seam collaborative mining method |
| CN105422097A (en) * | 2016-01-05 | 2016-03-23 | 淮南矿业(集团)有限责任公司 | Coal seam group mining method |
| CN106677781A (en) * | 2017-01-25 | 2017-05-17 | 中国矿业大学 | Pressure-relieving and permeability-increasing method for drilling exploitation of ultra-thin coal seam |
| CN106677781B (en) * | 2017-01-25 | 2019-01-01 | 中国矿业大学 | A kind of ultra-thin coal seam drilling release anti-reflection method |
| CN107905832A (en) * | 2017-11-06 | 2018-04-13 | 北京九尊能源技术股份有限公司 | The outburst elimination method of pump drainage is combined on a kind of nitrogen pressure break and ground with underground |
| CN112228142A (en) * | 2020-09-09 | 2021-01-15 | 郑成立 | Slow-dip coal seam roadway design and adjacent layer and goaf gas extraction method |
| CN112228142B (en) * | 2020-09-09 | 2022-08-05 | 郑成立 | Slow-dip coal seam roadway design and adjacent layer and goaf gas extraction method |
| CN113653491A (en) * | 2021-10-21 | 2021-11-16 | 煤炭科学研究总院 | Underground rock burst prevention and control method for coal seam group |
| CN113653491B (en) * | 2021-10-21 | 2022-01-14 | 煤炭科学研究总院 | Underground rock burst prevention and control method for coal seam group |
| CN116575973A (en) * | 2023-07-07 | 2023-08-11 | 山西凯嘉能源集团有限公司 | Method for controlling stope gas of working face under surrounding rock gas outburst condition |
| CN116575973B (en) * | 2023-07-07 | 2023-11-14 | 山西凯嘉能源集团有限公司 | Method for controlling stope gas of working face under surrounding rock gas outburst condition |
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| CN100535396C (en) | 2009-09-02 |
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