CN105134286B - L-type well goaf gas pumping method - Google Patents
L-type well goaf gas pumping method Download PDFInfo
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- CN105134286B CN105134286B CN201510656784.8A CN201510656784A CN105134286B CN 105134286 B CN105134286 B CN 105134286B CN 201510656784 A CN201510656784 A CN 201510656784A CN 105134286 B CN105134286 B CN 105134286B
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- type well
- extraction
- horizontal drilling
- working face
- gas
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- 238000000034 method Methods 0.000 title claims abstract description 18
- 238000005086 pumping Methods 0.000 title claims abstract description 13
- 238000005553 drilling Methods 0.000 claims abstract description 32
- 238000000605 extraction Methods 0.000 claims abstract description 28
- 238000010276 construction Methods 0.000 claims abstract description 10
- 238000005516 engineering process Methods 0.000 claims abstract description 7
- 239000011435 rock Substances 0.000 claims abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims 2
- 239000003245 coal Substances 0.000 abstract description 6
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 6
- 238000005065 mining Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 235000020681 well water Nutrition 0.000 description 1
- 239000002349 well water Substances 0.000 description 1
Classifications
-
- 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
- E21F7/00—Methods or devices for drawing- off gases with or without subsequent use of the gas for any purpose
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Drilling And Exploitation, And Mining Machines And Methods (AREA)
Abstract
The present invention relates to coal mine gas drainage method, specially a kind of L-type well goaf gas pumping method.A kind of L-type well goaf gas pumping method, using surface well construction technology, a bite horizontal drilling of being constructed in the fissure zone rock stratum above face roof, and be connected by vertical shaft with ground, form L-type well；When working face extraction, extraction is carried out to the goaf gas of working face by L-type well using ground gas extraction pump；The horizontal drilling horizontal plane projection between return airway and air intake lane and parallel to above-mentioned two tunnel；The horizontal drilling horizontal plane projection close to return airway；The front end of horizontal drilling is extended to above working face open-off cut eye.The present invention is that gas at upper corner is big during solving the problems, such as working face extraction, ensures the effective ways of working face safety coal extraction.The locus of horizontal drilling determines that this method can be good at completing the work of mash gas extraction, meets the needs of real work.
Description
Technical field
The present invention relates to coal mine gas drainage method, specially a kind of L-type well goaf gas pumping method.
Background technology
By the discussion of long-term gas govenance, top plate high drill holes extracting is effectively arranging for goaf gas improvement
Apply.Limited by down-hole mining time and space, the construction of underground High Position Drilling is easily influenceed by linking, and bore diameter, layer position
It is difficult to ensure that, causes its effect unstable.Large number of ground has been carried out at present and has adopted well experiment extraction goaf gas, achieves one
Determine effect.But by mining influence, adopt well and easily collapse stifled, universal effective range is smaller, and rate of air sucked in required is difficult to meet that high methane is adopted
Face gas control needs.Therefore it is highly desirable to a kind of method that disclosure satisfy that high methane and adopt face extraction improvement needs.
The content of the invention
The present invention adopts face gas pumping for the current high methane of solution can not meet the technical problem of actual improvement needs, there is provided
A kind of L-type well goaf gas pumping method.
The present invention is realized using following technical scheme：A kind of L-type well goaf gas pumping method, utilizes surface well
Construction technology, a bite horizontal drilling of constructing in the fissure zone rock stratum above face roof, and be connected by vertical shaft with ground,
Form L-type well；When working face extraction, the goaf gas of working face is carried out by L-type well using ground gas extraction pump
Extraction；The horizontal drilling horizontal plane projection between return airway and air intake lane and parallel to above-mentioned two tunnel；It is described
Horizontal drilling horizontal plane projection close to return airway；The front end of horizontal drilling is extended to above working face open-off cut eye.
Horizontal segment layer position where specific horizontal drilling is in working face away from a range of top plate of return airway horizontal range
In fissure zone rock stratum.When working face extraction, select and utilize supporting ground gas extraction pump by L-type well to working face
Goaf high position high concentration gas carries out extraction, and then goaf and gas at upper corner are gushed out greatly during solution working face extraction
The problem of.
The present invention is that gas at upper corner is big during solving the problems, such as working face extraction, ensures having for working face safety coal extraction
Efficacious prescriptions method.The locus of horizontal drilling determines that this method can be good at completing the work of mash gas extraction, meets actual work
The demand of work.
Further, the horizontal drilling of the L-type well and the spacing of projection of the return airway in horizontal plane are 10-60m.
The distance of horizontal drilling and return airway can effectively ensure that the dynamics of extraction in the spacing that horizontal plane projects so that work
Making the gas in face can be tried one's best by extraction, and the actual mining of working face will not be had an impact.
Further, the bore of the horizontal drilling is more than 150mm.
The bore of horizontal drilling can realize the abundant extraction to gas.
The present invention has further the advantage that：1. underground top plate High Position Drilling can be substituted, and pumping volume is stable, concentration is high；
2. ground L-type well construction, which does not influence underground, adopts face preparatory construction；3. after working face extraction, ground L-type well can continue to take out
Adopt, realize that resource reclaims to greatest extent.
Brief description of the drawings
Fig. 1 flat perspective views of L-type well water of the present invention.
Fig. 2 is the diagrammatic cross-section of the L-type well of invention.
Embodiment
A kind of L-type well goaf gas pumping method, using surface well construction technology, the crack above face roof
Construction a bite horizontal drilling in band rock stratum, and be connected by vertical shaft with ground, form L-type well；When working face extraction, ground is utilized
Face gas pumping pump carries out extraction by L-type well to the goaf gas of working face；Projection of the horizontal drilling in horizontal plane
Between return airway and air intake lane and parallel to above-mentioned two tunnel；The horizontal drilling horizontal plane projection close to return air
Lane；The front end of horizontal drilling is extended to above working face open-off cut eye.
The horizontal drilling of the L-type well and the spacing of projection of the return airway in horizontal plane are 10-60m.
The bore of the horizontal drilling is more than 150mm.
The key technology of L-type well is to determine optimal air guide fissure zone, passes through theoretical research, numerical simulation, conventional ground coal
Layer gas well is determined the distribution of working face "O"-ring and roof fracture band by existing methods such as the on-the-spot test of mining influence, so as to most
Optimal air guide fissure zone is determined eventually.After L-type well horizontal segment layer position determines, drilling well is completed using surface well construction technology.Work as work
During the back production of face, open ground gas extraction pump and goaf gas is taken out by L-type well, goaf gas in the exploitation process of face is adopted in reduction
Gush out, ensure that the safety coal extraction of working face.As shown in Figure 1, 2, horizontal drilling is parallel with return airway in the projection of horizontal plane
And it is close, horizontal drilling is located in the fissure zone rock stratum above working face, and such spatial design is able to ensure that extracting result.
Claims (2)
- A kind of 1. L-type well goaf gas pumping method, it is characterised in that：Using surface well construction technology, in face roof Construction a bite horizontal drilling in the fissure zone rock stratum of top, and be connected by vertical shaft with ground, form L-type well；When working face returns When adopting, extraction is carried out to the goaf gas of working face by L-type well using ground gas extraction pump；The horizontal drilling is in water The projection of plane is between return airway and air intake lane and parallel to above-mentioned two tunnel；Projection of the horizontal drilling in horizontal plane Close to return airway；The front end of horizontal drilling is extended to above working face open-off cut eye；The horizontal drilling of the L-type well is with return airway in water The spacing of the projection of plane is 10-60m.
- 2. L-type well goaf gas pumping method as claimed in claim 1, it is characterised in that：The bore of the horizontal drilling For more than 150mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510656784.8A CN105134286B (en) | 2015-10-13 | 2015-10-13 | L-type well goaf gas pumping method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510656784.8A CN105134286B (en) | 2015-10-13 | 2015-10-13 | L-type well goaf gas pumping method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105134286A CN105134286A (en) | 2015-12-09 |
| CN105134286B true CN105134286B (en) | 2017-12-19 |
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|---|---|---|---|
| CN201510656784.8A Active CN105134286B (en) | 2015-10-13 | 2015-10-13 | L-type well goaf gas pumping method |
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| Country | Link |
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| CN (1) | CN105134286B (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105545205B (en) * | 2015-12-23 | 2018-06-08 | 大同煤矿集团有限责任公司 | High intensity Gas Full-Mechanized Caving Face extraction ground L-type boring method |
| CN109538282A (en) * | 2018-09-28 | 2019-03-29 | 山西晋城无烟煤矿业集团有限责任公司 | A kind of coal bed gas adopts L-type well horizontal segment layer position preferred method |
| CN109488381B (en) * | 2018-12-11 | 2021-02-19 | 太原理工大学 | Method for accurately determining optimal well position and layer position for gas extraction in goaf |
| CN111022109B (en) * | 2019-12-24 | 2021-06-01 | 山西晋城无烟煤矿业集团有限责任公司 | Method for extracting gas in closed goaf |
| CN111927399A (en) * | 2020-07-29 | 2020-11-13 | 山西晋城无烟煤矿业集团有限责任公司 | Coal mine mining area gas extraction method |
| CN112012783B (en) * | 2020-08-07 | 2022-04-15 | 太原理工大学 | Anti-damage ground drilling gas extraction method |
| CN112145224B (en) * | 2020-10-26 | 2023-06-20 | 山西晋城无烟煤矿业集团有限责任公司 | Construction method for multi-branch horizontal well of coal seam roof in mining area |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101240715A (en) * | 2008-01-24 | 2008-08-13 | 淮北矿业（集团）有限责任公司 | One well three-purpose mash gas harnessing method for ground well drilling and ground well drilling |
| US7866921B2 (en) * | 2009-09-11 | 2011-01-11 | Stefan Stamoulis | Tool and method for extracting landfill gas |
| CN102080519A (en) * | 2011-01-21 | 2011-06-01 | 中矿瑞杰(北京)科技有限公司 | Method for extracting coal bed gas by negative pressure on ground through gas-coal simultaneous extraction |
| CN102226412B (en) * | 2011-05-24 | 2013-06-05 | 中国矿业大学 | Underground dark mining drilling well gas extraction method |
| US20140318805A1 (en) * | 2013-04-30 | 2014-10-30 | Halliburton Energy Services, Inc. | Coal bed gas well apparatus and method with minable non-sparking tubular and valve components |
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| CN105134286A (en) | 2015-12-09 |
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