CN100526606C - Method for extracting protruded coal-bed downward bedding long-borehole step-by-step covering area gas - Google Patents
Method for extracting protruded coal-bed downward bedding long-borehole step-by-step covering area gas Download PDFInfo
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- CN100526606C CN100526606C CNB2007100211604A CN200710021160A CN100526606C CN 100526606 C CN100526606 C CN 100526606C CN B2007100211604 A CNB2007100211604 A CN B2007100211604A CN 200710021160 A CN200710021160 A CN 200710021160A CN 100526606 C CN100526606 C CN 100526606C
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- 238000000034 method Methods 0.000 title claims description 15
- 239000003245 coal Substances 0.000 claims abstract description 40
- 238000000605 extraction Methods 0.000 claims abstract description 34
- 238000005086 pumping Methods 0.000 claims description 33
- 238000010276 construction Methods 0.000 claims description 20
- 238000007789 sealing Methods 0.000 claims description 20
- 238000005553 drilling Methods 0.000 claims description 18
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000005065 mining Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
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Abstract
This is a gas extraction method for a single burst coal bed of stable coal occurrence, angle less than 10o, and firm index over 0.5. Drill a hole from top working face downward along the coal bed from shallow bed to deep, from low gas concentration zone to high for pre-extraction to lower down the gas concentration.
Description
Technical field
The present invention relates to projecting coal bedly down to the regional gas pumping method of shielding that goes forward one by one along a layer long drilled holes, be particularly useful for that ocurrence of coal seam is stable, the inclination angle less than 10 °, solid coefficient greater than 0.5 single projecting coal bed zonal gas pumping.
Background technology
Along with the increase of the seam mining degree of depth, coal-bed gas pressure and gas bearing capacity are increasing, and the part coal seam is converted into projecting coal bed.According to national relevant regulations, should carry out gas pumping before the projecting coal bed exploitation, the regional gas pumping method matcoveredn exploitation and the floor roadway coal seam of usually adopting are taken out two kinds in advance, but these two kinds pumping method is long in time limit, cost is high.
Summary of the invention
In view of the problem that prior art exists, it is short, projecting coal bed down to the regional gas pumping method of shielding that goes forward one by one along layer long drilled holes cheaply to the purpose of this invention is to provide a kind of duration.
Of the present invention projecting coal bed down to the regional gas pumping method of shielding that goes forward one by one along layer long drilled holes:
1) in the following group in upper curtate work plane machine lane, to first regional construction drill of gas pumping work plane, boring is arranged in parallel along the coal seam tendency, cover first zone of gas pumping work plane, the spacing of wells is that 2～5m, diameter are 90mm, boring is passed and is set work plane Yao Xiang position, continues to creep into, and guarantees at the bottom of the hole that apart from work plane waist lane group is not less than 10m down;
2) after drilling construction finishes, withdraw from drilling rod, insert hole sealing tube and implement sealing of hole, sealed borehole length is not less than 10m, and hole sealing tube length is not less than 12m, diameter 40mm;
3) connect hole sealing tube with collecting pipe, will hole and the extraction pipeline connection carries out gas pumping, guarantee that the extraction system is not less than 15kPa in the negative pressure that drilling orifice forms, the extraction time was not less than 3 months;
4) coal seam outburst hazard checking is carried out in first zone of work plane, 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;
5) along desired location driving face waist lane, the section in waist lane is 5～8m
2
6) in the following group in work plane waist lane, to second regional construction drill of gas pumping work plane, boring is arranged in parallel along the coal seam tendency, cover second zone of gas pumping work plane, the spacing of wells is that 2～5m, diameter are 90mm, boring is passed and is set work plane Yao Xiang position, continues to creep into, and guarantees at the bottom of the hole that apart from work plane machine lane group is not less than 10m down;
7) after drilling construction finishes, withdraw from drilling rod, insert hole sealing tube and implement sealing of hole, sealed borehole length is not less than 10m, and hole sealing tube length is not less than 12m, diameter 40mm;
8) connect hole sealing tube with collecting pipe, will hole and the extraction pipeline connection carries out gas pumping, guarantee that the extraction system is not less than 15kPa in the negative pressure that drilling orifice forms, the extraction time was not less than 3 months;
9) coal seam outburst hazard checking is carried out in second zone of work plane, 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;
10) in desired location development machine lane, repeat said process, carry out the gas pumping of lower curtate work plane.
Described waist lane across pitch is arranged in the middle part of work plane tendency.
This method adopts along layer long drilled holes extraction heading driving zone and working face mining zone coal body gas, be applicable to that ocurrence of coal seam is stablized, the inclination angle less than 10 °, solid coefficient greater than 0.5 single projecting coal bed zonal gas pumping.This method by superficial part to the deep, by the present low gas district to high gas district, by the construction of last bank face machine lane or waist lane down to tilting along a layer long drilled holes, taking out coal-bed gas in advance, can effectively reduce coal seam gas-bearing capacity, regional eliminating removes the outburst hazard in coal seam, realizes comprehensive mechanized driving of projecting coal bed tunnel and safety and high efficiency; Adopt this method also can reduce the gas pumping engineering quantity significantly, shorten the gas control time, realize comprehensive mechanized driving of projecting coal bed tunnel and safety and high efficiency.Effectively the gas emission during reduction tunnelling and the working face extraction guarantees the safety in production of work plane.The coal road driving speed is brought up to more than the 350m by 40～50m, has shortened work plane time, and the work plane daily output can reach more than the 5000t.
The specific embodiment
The present invention is projecting coal bed down to the regional gas pumping method of shielding that goes forward one by one along layer long drilled holes:
Set technological parameter: holing is arranged in parallel along the coal seam tendency, spacing 2～5m, and diameter 90mm, the length of holing is a false add 10m of work plane tendency length, guarantees that the distance in the group whole hole of distance boring under work plane waist lane or the machine lane is not less than 10m; Drilling and sealing length is not less than 10m, and the hole sealing tube diameter is 40mm, and will hole by collecting pipe is communicated with the extraction pipeline.The waist lane is that face gas is administered special-purpose tunnel, and across pitch is arranged in the middle part of work plane tendency, and design of section is 5～8m
2Guarantee that the drilling orifice negative pressure is not less than 15kPa, finding time in advance is not less than 3 months.
First regional drilling construction: from upper curtate work plane machine lane construction down to along a layer long drilled holes, first regional coal-bed gas of extraction work plane, sealing of hole immediately after drilling construction finishes, and with the collecting pipe connection extraction pipeline of will hole.
First regional gas pumping: boring is carried out gas pumping after being communicated with the extraction pipeline immediately, guarantees enough finding time in advance, realizes the evenly effectively extraction of first regional coal-seam of work plane.
The outburst hazard checking is eliminated in first zone: by gas pumping, first regional coal-seam gas remainder quantity of work plane should be reduced to 8m
3Following or the remaining gas pressure of/t is reduced to 0.74MPa, thoroughly eliminates the outburst hazard of first regional coal-seam of work plane, guarantees the safe construction in waist lane.
Waist lane construction: after first regional coal-seam of work plane is eliminated outburst danger, in work plane middle part construction waist lane, for second regional extraction borehole of construction working face is prepared.
Second regional drilling construction: from the waist lane construction down to along a layer long drilled holes, second regional coal-bed gas of extraction work plane, sealing of hole immediately after drilling construction finishes, and be connected into the extraction pipeline with collecting pipe.
Second regional gas pumping: carry out gas pumping immediately after boring is connected into the extraction pipeline, guarantee enough finding time in advance, realize the evenly effectively extraction of second regional coal-seam of work plane.
The outburst hazard checking is eliminated in second zone: by gas pumping, second regional coal-seam gas remainder quantity of work plane should be reduced to 8m
3Following or the remaining gas pressure of/t is reduced to 0.74MPa, thoroughly eliminates the outburst hazard of second regional coal-seam of work plane, guarantees the safe construction in machine lane.
Driving heading back production coal seam: after the work plane coal body was all eliminated outburst danger, the heading of just can constructing carried out the back production coal seam.
Claims (2)
1. projecting coal bed down to the regional gas pumping method of shielding that goes forward one by one along layer long drilled holes, it is characterized in that:
1) in the following group in upper curtate work plane machine lane, to first regional construction drill of gas pumping work plane, boring is arranged in parallel along the coal seam tendency, cover first zone of gas pumping work plane, the spacing of wells is that 2～5m, diameter are 90mm, boring is passed and is set work plane Yao Xiang position, continues to creep into, and guarantees at the bottom of the hole that apart from work plane waist lane group is not less than 10m down;
2) after drilling construction finishes, withdraw from drilling rod, insert hole sealing tube and implement sealing of hole, sealed borehole length is not less than 10m, and hole sealing tube length is not less than 12m, diameter 40mm;
3) connect hole sealing tube with collecting pipe, will hole and the extraction pipeline connection carries out gas pumping, guarantee that the extraction system is not less than 15kPa in the negative pressure that drilling orifice forms, the extraction time was not less than 3 months;
4) coal seam outburst hazard checking is carried out in first zone of work plane, 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;
5) along desired location driving face waist lane, the section in waist lane is 5～8m
2
6) in the following group in work plane waist lane, to second regional construction drill of gas pumping work plane, boring is arranged in parallel along the coal seam tendency, cover second zone of gas pumping work plane, the spacing of wells is that 2～5m, diameter are 90mm, boring is passed and is set work plane Yao Xiang position, continues to creep into, and guarantees at the bottom of the hole that apart from work plane machine lane group is not less than 10m down;
7) after drilling construction finishes, withdraw from drilling rod, insert hole sealing tube and implement sealing of hole, sealed borehole length is not less than 10m, and hole sealing tube length is not less than 12m, diameter 40mm;
8) connect hole sealing tube with collecting pipe, will hole and the extraction pipeline connection carries out gas pumping, guarantee that the extraction system is not less than 15kPa in the negative pressure that drilling orifice forms, the extraction time was not less than 3 months;
9) coal seam outburst hazard checking is carried out in second zone of work plane, 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;
10) in desired location development machine lane, repeat said process, carry out the gas pumping of lower curtate work plane.
2. according to claim 1 projecting coal bed down to the regional gas pumping method of shielding that goes forward one by one along layer long drilled holes, it is characterized in that: waist lane across pitch is arranged in the middle part of work plane tendency.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100211604A CN100526606C (en) | 2007-04-02 | 2007-04-02 | Method for extracting protruded coal-bed downward bedding long-borehole step-by-step covering area gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100211604A CN100526606C (en) | 2007-04-02 | 2007-04-02 | Method for extracting protruded coal-bed downward bedding long-borehole step-by-step covering area gas |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101029575A CN101029575A (en) | 2007-09-05 |
| CN100526606C true CN100526606C (en) | 2009-08-12 |
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| CNB2007100211604A Expired - Fee Related CN100526606C (en) | 2007-04-02 | 2007-04-02 | Method for extracting protruded coal-bed downward bedding long-borehole step-by-step covering area gas |
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Families Citing this family (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101575983B (en) * | 2009-02-27 | 2012-07-04 | 河南省煤层气开发利用有限公司 | Directional fracturing permeability improvement outburst elimination method in coal mine and device thereof. |
| CN101649740B (en) * | 2009-09-03 | 2011-08-31 | 周福宝 | Ground bored well body structure for gas extraction |
| CN101781989B (en) * | 2010-01-31 | 2011-01-26 | 山西晋城无烟煤矿业集团有限责任公司 | High-gas mine crossheading echelon short-drainage rapid tunneling process |
| CN102061933B (en) * | 2010-12-13 | 2012-10-31 | 山西晋城无烟煤矿业集团有限责任公司 | Long drilling positioning construction process |
| CN102337922B (en) * | 2011-09-30 | 2013-06-12 | 中煤科工集团重庆研究院 | Method for inspecting burst-preventing effect of areas |
| CN102678166B (en) * | 2012-05-25 | 2014-03-26 | 中国矿业大学 | Method for increasing gas extraction rate by permeability increasing of single thick coal seam |
| CN103670497A (en) * | 2013-12-25 | 2014-03-26 | 大同煤矿集团有限责任公司 | Gas treatment method used when tunneled underground coal mine roadway is communicated with abandoned roadway |
| CN104793261A (en) * | 2015-04-07 | 2015-07-22 | 中国矿业大学 | Drilling detection method for coal measure stratum structuring, weak area recognition and stratum inversion |
| CN105909254B (en) * | 2016-04-29 | 2018-04-24 | 中煤科工集团西安研究院有限公司 | Projecting coal bed bottom plate, which is faced upward, wears the advanced area cover coal roadway tunneling method of layer directional hole |
| CN106089289B (en) * | 2016-06-08 | 2018-12-21 | 中国矿业大学 | Alternately protected type stope concordant drilling hydraulic flushing in hole makes cave construction method |
| CN106894837B (en) * | 2017-03-20 | 2018-09-25 | 中国矿业大学 | A kind of progressive protected type gas release pumping method |
| CN108104865B (en) * | 2017-11-28 | 2019-06-11 | 中国矿业大学 | A kind of concordant drilling Anti-air-leakage gas pumping method |
| CN108331611A (en) * | 2018-04-10 | 2018-07-27 | 山西霍尔辛赫煤业有限责任公司 | Short-hole rapid extraction structure and method for high-gas tunneling working face |
| CN112392538B (en) * | 2020-11-18 | 2023-03-14 | 太原理工大学 | Progressive shield type bedding hydraulic cave construction method for tunneling working face of structural coal seam |
| CN114086958B (en) * | 2022-01-21 | 2022-04-08 | 太原理工大学 | Progressive bedding hydraulic cave-making construction method for stope face of monocline coal seam |
Citations (1)
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| CN1693654A (en) * | 2005-06-02 | 2005-11-09 | 淮南矿业(集团)有限责任公司 | Gas pressure relief method of ground drilling extraction minery and goaf |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1693654A (en) * | 2005-06-02 | 2005-11-09 | 淮南矿业(集团)有限责任公司 | Gas pressure relief method of ground drilling extraction minery and goaf |
Non-Patent Citations (3)
| Title |
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| 井巷揭煤过程中的防突工序及其应用. 周言安.煤矿开采，第12卷第1期. 2007 * |
| 淮北矿区煤层气资源及抽放技术. 范景坤.中国煤层气，第1卷第2期. 2004 * |
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| CN101029575A (en) | 2007-09-05 |
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Granted publication date: 20090812 Termination date: 20100402 |