CN102003201B - Gas drainage method in gob of coal mine - Google Patents
Gas drainage method in gob of coal mine Download PDFInfo
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- CN102003201B CN102003201B CN 201010598492 CN201010598492A CN102003201B CN 102003201 B CN102003201 B CN 102003201B CN 201010598492 CN201010598492 CN 201010598492 CN 201010598492 A CN201010598492 A CN 201010598492A CN 102003201 B CN102003201 B CN 102003201B
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- vacuum pump
- coal mine
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Abstract
The invention relates to a gas drainage technology, in particular to a gas drainage method in the gob of a coal mine, which is used for solving the problems of low drainage concentration and small drainage quantity of the existing gas drainage technology of the gob. The gas drainage method comprises the following steps: (1) selecting borehole positions according to the rock property of the gobs; (2) drilling holes on an arc roof of the gob by a three-section drilling mode after the borehole positions are selected; (3) inserting sleeves into the boreholes after the construction is finished; (4) connecting the sleeves with a vacuum pump and carrying out gas drainage by the vacuum pump; and (5) collecting gas drainage data of the vacuum pump. The gas drainage method can be used for effectively solving the problems of low drainage concentration and small drainage quantity of the existing gas drainage technology of the gob, thus being applicable to gas drainage in the gob during the back production of the coal mine.
Description
Technical field
The present invention relates to gas drainage technique, specifically a kind of gas drainage method in gob of coal mine.
Background technology
When carrying out stope of coal mines, need first gas drainage under suction to be carried out in the goaf; Generally adopt at present return air to get in touch with horizontal river intubate goaf gas is carried out extraction, practice shows, when adopting this kind extraction technology to carry out gas drainage under suction, extraction concentration is low, pumping volume is little, gas tail road concentration is high, gas density is up to 2.22%, has restricted to a certain extent the construction of high-yield and high-efficiency work plane, work plane day advance rate only be 8 circulations; Gas tail road is subjected to work plane secondary mining influence in addition, and roadway deformation is serious, and the minimum section of available ventilation section only is 4m
About, the total air distribution amount of work plane is also by initial 3700m
3/ min is down to 3000m
3About/min, tail lane air quantity is then by 1700m
3/ min is down to 1500m
3/ min, ventilation is progressively downward trend, has a strong impact on production safety; Based on this, be necessary to invent a kind of extraction concentration height and the large gas drainage method in gob of coal mine of pumping volume.
Summary of the invention
The present invention provides a kind of gas drainage method in gob of coal mine in order to solve the existing problem that goaf gas drainage technology extraction concentration is low and pumping volume is little.
The present invention adopts following technical scheme to realize: gas drainage method in gob of coal mine, the method are to adopt following steps to realize: (1) selects bore position according to the rock property in goaf; (2) choose bore position after, at place, the arc top in goaf construction drill, construction adopt three spud in into mode; (3) after construction finishes, in boring, insert sleeve pipe; (4) sleeve pipe is connected with vacuum pump, adopts vacuum pump to carry out gas drainage under suction; (5) the gas drainage under suction data of collection vacuum pump.
Compare with existing goaf gas drainage technology, gas drainage method in gob of coal mine of the present invention has positive effect to the gas density that reduces face upper corner angle and gas tail road, efficiently solve the difficult problem that layering fully-mechanized mining working goaf gas is administered, greatly improved the safety work environment of work plane; Test shows, adopt gas drainage method in gob of coal mine of the present invention after, advance period to be increased to 10 by original 8 work plane day, promoted the construction of high-yield and high-efficiency stope; Practice shows, in gas drainage method in gob of coal mine of the present invention, the best drainage radius of boring is about 80m, and effective drainage radius of boring then can reach 160m above (by 2 times of considerations of best drainage radius), and its effective influence basin reaches more than the 350m; During table 1 is 15 days-June 18 May in 2010, adopt gas drainage method in gob of coal mine of the present invention to carry out the result of goaf gas drainage test, the vacuum pump that adopts in the test is CBF410-2BZ3 type water-ring vacuum pump:
Table 1 shows, adopts gas drainage method in gob of coal mine of the present invention to improve greatly gas drainage under suction concentration and gas drainage amount.
The present invention efficiently solves the existing problem that goaf gas drainage technology extraction concentration is low and pumping volume is little, is applicable to the goaf gas drainage in the stope of coal mines process.
The specific embodiment
Gas drainage method in gob of coal mine, the method are to adopt following steps to realize: (1) selects bore position according to the rock property in goaf; (2) choose bore position after, at place, the arc top in goaf construction drill, construction adopt three spud in into mode; (3) after construction finishes, in boring, insert sleeve pipe; (4) sleeve pipe is connected with vacuum pump, adopts vacuum pump to carry out gas drainage under suction; (5) the gas drainage under suction data of collection vacuum pump.
Claims (1)
1. gas drainage method in gob of coal mine is characterized in that: the method is to adopt following steps to realize: (1) selects bore position according to the rock property in goaf; (2) choose bore position after, at place, the arc top in goaf construction drill, construction adopt three spud in into mode; (3) after construction finishes, in boring, insert sleeve pipe; (4) sleeve pipe is connected with vacuum pump, adopts vacuum pump to carry out gas drainage under suction; (5) the gas drainage under suction data of collection vacuum pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010598492 CN102003201B (en) | 2010-12-21 | 2010-12-21 | Gas drainage method in gob of coal mine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010598492 CN102003201B (en) | 2010-12-21 | 2010-12-21 | Gas drainage method in gob of coal mine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102003201A CN102003201A (en) | 2011-04-06 |
| CN102003201B true CN102003201B (en) | 2013-01-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010598492 Active CN102003201B (en) | 2010-12-21 | 2010-12-21 | Gas drainage method in gob of coal mine |
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| CN (1) | CN102003201B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102251799B (en) * | 2011-06-30 | 2013-08-28 | 中煤科工集团西安研究院 | Method for selecting high-level gas drainage horizon in coal mine |
| CN103277129B (en) * | 2013-04-22 | 2016-04-06 | 河南理工大学 | One prevents Top Corner Gas on Coal Face to transfinite technology |
| CN104405283B (en) * | 2014-10-22 | 2016-02-10 | 山西晋城无烟煤矿业集团有限责任公司 | The technique of L-type well mash gas extraction is bored on a kind of minery ground |
| CN105351000A (en) * | 2015-06-24 | 2016-02-24 | 山西晋城无烟煤矿业集团有限责任公司 | Goaf roof high-position directional borehole gas extraction technology |
| CN114233368B (en) * | 2021-12-28 | 2023-10-13 | 山西晋煤集团技术研究院有限责任公司 | Method for treating harmful gas leakage in overlying goaf |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101082283A (en) * | 2007-06-29 | 2007-12-05 | 淮南矿业(集团)有限责任公司 | Gob-side entry retaining Y-shaped ventilation goaf roof pressure relief gas extraction method |
| CN101169042A (en) * | 2007-11-23 | 2008-04-30 | 煤炭科学研究总院抚顺分院 | Caving zone edge inclined drill hole bushing burying method for extracting and discharging gas for goaf and adjacent layer |
| CN101251028A (en) * | 2008-04-03 | 2008-08-27 | 淮南矿业(集团)有限责任公司 | Method for taking out and picking high gassy seam group dislodging gob-side entry retaining Y type ventilated decompression firedamp |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU1800061C (en) * | 1990-05-28 | 1993-03-07 | Тульский Политехнический Институт | Method for degassing mined coal seam |
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2010
- 2010-12-21 CN CN 201010598492 patent/CN102003201B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101082283A (en) * | 2007-06-29 | 2007-12-05 | 淮南矿业(集团)有限责任公司 | Gob-side entry retaining Y-shaped ventilation goaf roof pressure relief gas extraction method |
| CN101169042A (en) * | 2007-11-23 | 2008-04-30 | 煤炭科学研究总院抚顺分院 | Caving zone edge inclined drill hole bushing burying method for extracting and discharging gas for goaf and adjacent layer |
| CN101251028A (en) * | 2008-04-03 | 2008-08-27 | 淮南矿业(集团)有限责任公司 | Method for taking out and picking high gassy seam group dislodging gob-side entry retaining Y type ventilated decompression firedamp |
Non-Patent Citations (1)
| Title |
|---|
| 刘伟等.高瓦斯综放工作面上隅角竖直钻孔瓦斯抽放技术.《水力采煤与管道运输》.2009,(第02期), * |
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| CN102003201A (en) | 2011-04-06 |
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