CN102943687A - Pressure equalizing and hole sealing method for gas extraction drilling - Google Patents
Pressure equalizing and hole sealing method for gas extraction drilling Download PDFInfo
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- CN102943687A CN102943687A CN2012105050436A CN201210505043A CN102943687A CN 102943687 A CN102943687 A CN 102943687A CN 2012105050436 A CN2012105050436 A CN 2012105050436A CN 201210505043 A CN201210505043 A CN 201210505043A CN 102943687 A CN102943687 A CN 102943687A
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Abstract
The invention provides a pressure equalizing and hole sealing method for gas extraction drilling. A gas extraction pipe is inserted inside a drilling hole for construction; a gas extraction chamber communication pipe and a pressure adjusting air chamber communication pipe can be inserted for sealing a drilling hole; the hole sealing inner side space is used as a gas extraction chamber; a hole sealing process can be stopped at a position 4-6 m away from a hole opening, and the hole sealing process of 2-3m can be carried out after retreating to the position of the hole opening; the middle interval space is used as a pressure adjusting air chamber, so that a gas extraction pipe is connected with a gas extraction pipe network for extraction; the pressure adjusting gas chamber and the gas extraction chamber are communicated through a U-shaped pipe filled with level-indicating liquid mounted at the outer side of a pipeline; the pressure of the gas extraction chamber is reduced with the gas extraction, so that external air enters the pressure adjusting gas chamber; the pressure of the pressure adjusting gas chamber is increased and is displayed through the level-indicating liquid on the U-shaped pipe; pressure relief is carried out by opening a pressure relief valve at a high level; and the pressure relief valve can be switched off after a liquid post of the level-indicating liquid is stable. Through fixed-period pressure relief, gas leakage plugging is realized, and the external gas is prevented from entering a channel inside the drill hole, so that the gas extraction concentration can be greatly improved; the gas extraction validity period of the drilling hole can be prolonged; and the extraction rate of the drilling hole can be improved.
Description
Technical field
The present invention relates to the equal press seal hole method of mash gas pumping drilling, be particularly useful for overcoming the technical barrier that the gas pumping negative pressure is not high, extraction concentration is excessively low that the outside cranny development of boring causes.
Background technology
In mine gas drilling extraction work, the quality of mash gas extraction effect depends primarily on the sealing quality of boring.China's coal-mine extraction borehole sealing material and technique mainly contain: the artificial sealing of hole of clay-stopper, hole packer sealing of hole, the expanded material mechanical type sealing of holes such as cement mortar sealing of hole and polyurethane etc.But along with the carrying out of extraction, the rib crack is expanded gradually, provides gas to reveal and extraneous gas enters drilled tunnel, causes that the gas pumping negative pressure is not high, gas extraction concentration is excessively low, has a strong impact on extracting result.
Summary of the invention
Technical problem: the present invention seeks to overcome the weak point in the prior art, provide that a kind of method is simple, cost is low, effective, easy to operate, can prevent that extraneous gas from entering the equal press seal hole method of the mash gas pumping drilling of extraction borehole.
Technical scheme: the equal press seal hole method of the mash gas pumping drilling of invention comprises that to the coal body construction drill gas pumping pipe is inserted in the boring, and concrete steps are as follows:
A. when the gas pumping pipe inserts boring, insert extraction air chamber communicating pipe and pressure chamber communicating pipe;
B. from inside to outside sealing of hole is carried out in boring routinely, the sealing of hole inner space is as the extraction air chamber, the 4-6m place stops sealing of hole in the distance aperture, retreat to the sealing of hole that the place, aperture carries out 2-3m again, the midfeather space is as pressure chamber, pressure chamber communicating pipe, the mouth of pipe was positioned at pressure chamber, and gas pumping pipe and the mouth of pipe of extraction air chamber communicating pipe are positioned at the extraction air chamber;
C. connect a relief tube exposing the Guan Shangjing threeway pressure chamber communicating pipe, relief valve is housed on the relief tube, the U-shaped pipe that is connected with extraction air chamber communicating pipe is housed exposing the port pressure chamber communicating pipe, be marked with in the U-shaped pipe and show a liquid, be marked with the warning line that prevents that differential pressure of atmospheric pressure is too high at the U-shaped pipe that connects extraction air chamber communicating pipe one side;
D. the gas pumping pipe is connected the gas pumping pipe network and carry out extraction, extraction along with gas, the pressure decreased of extraction air chamber, outside air enters pressure chamber, pressure in the pressure chamber is raise, under the effect of two pressure reduction, air pressure entered through pressure chamber communicating pipe, will show that a liquid pushes to extraction air chamber communicating pipe direction;
E. when connect in the U-shaped pipe extraction air chamber communicating pipe one side show that a liquid height surpasses warning line the time, open relief valve and carry out pressure release, when showing that a liquid fluid column closes relief valve after stable.
Described relief valve is manual pressure release or by sensor control releasing pressure automatically; A described liquid that shows is the larger organic liquid mixture body of mercury or density.
Beneficial effect: owing to adopted technique scheme, the present invention is communicated with by the pressure chamber that arranges is all pressed with the extraction air chamber, the simultaneously timely pressure release by relief valve guarantees that extraneous gas can not enter in the extraction air chamber, effectively shutoff gas reveal and the extraneous gas admission passage, improve gas extraction concentration, greatly prolonged the gas pumping period of validity.Its method is simple, cost is low, effective, easy to operate, can prevent that extraneous gas from entering extraction borehole, prolonging gas pumping valid expiration date, has widely practicality.
Description of drawings
Fig. 1 is enforcement structural representation of the present invention.
Among the figure: extraction air chamber-1, coal body-2, gas pumping pipe-3, material block section-4, extraction air chamber communicating pipe-5, pressure chamber-6, pressure chamber communicating pipe-7, threeway-8, relief tube-9, relief valve-10, U-shaped water column meter-11, water-12, warning line-13.
The specific embodiment
Below in conjunction with accompanying drawing one embodiment of the present of invention are further described:
The equal press seal hole method of mash gas pumping drilling of the present invention routinely to coal body 2 construction drills, is inserted gas pumping pipe 3 in the boring, when gas pumping pipe 3 inserts boring, inserts extraction air chamber communicating pipe 5 and pressure chamber communicating pipe 7; From inside to outside sealing of hole is carried out in boring routinely, the 4-6m place stops sealing of hole in the distance aperture, retreat to the sealing of hole that the place, aperture carries out 2-3m again, the midfeather space is as pressure chamber 6, shutoff boring inner space is as extraction air chamber 1, pressure chamber communicating pipes 7, the mouth of pipe was positioned at pressure chamber 6, and gas pumping pipe 3 is positioned at extraction air chamber 1 with the mouth of pipe of extraction air chamber communicating pipe 5; Exposing Guan Shangjing threeway 8 connections one relief tube 9 pressure chamber communicating pipe 7, relief valve 10 is housed on the relief tube 9, the U-shaped pipe 11 that is connected with extraction air chamber communicating pipe 5 is housed exposing the port pressure chamber communicating pipe 7, be marked with in the U-shaped pipe 11 and show a liquid 12, be marked with at the U-shaped pipe 11 that connects extraction air chamber communicating pipes 5 one side and prevent the too high warning line of differential pressure of atmospheric pressure 13; Gas pumping pipe 3 is connected the gas pumping pipe network carry out extraction, extraction along with gas, the pressure decreased of extraction air chamber 1, outside air enters pressure chamber 6, pressure in the pressure chamber 6 is raise, under the effect of two pressure reduction, air pressure entered through pressure chamber communicating pipe 7, will show that a liquid 12 is to extraction air chamber communicating pipes 5 direction pushing; When interior connection extraction air chamber communicating pipes 5 one of U-shaped pipe 11 side show that a liquid 12 highly surpasses warning line 13 time, open relief valve 10 and carry out pressure release, when showing that a liquid 12 fluid columns close relief valve 10 after stable.Described relief valve 10 is manual pressure release or by sensor control releasing pressure automatically; A described liquid that shows is the larger organic liquid mixture body of mercury or density.
Realized that by regular pressure release shutoff gas is revealed and extraneous gas enters the interior passage of boring, improved gas extraction concentration, prolonged drilling gas extraction period of validity, improved the hole pumping and mining rate.
Claims (3)
1. the equal press seal hole method of a mash gas pumping drilling comprises to coal body (2) construction drill, and gas pumping pipe (3) is inserted in the boring, it is characterized in that:
A. when gas pumping pipe (3) inserts boring, insert extraction air chamber communicating pipe (5) and pressure chamber communicating pipe (7);
B. from inside to outside sealing of hole is carried out in boring routinely, the sealing of hole inner space is as extraction air chamber (1), the 4-6m place stops sealing of hole in the distance aperture, retreat to the sealing of hole that the place, aperture carries out 2-3m again, the midfeather space is as pressure chamber (6), pressure chamber communicating pipe, (7) mouth of pipe was positioned at pressure chamber (6), and gas pumping pipe (3) is positioned at extraction air chamber (1) with the mouth of pipe of extraction air chamber communicating pipe (5);
C. exposing Guan Shangjing threeway (8) connection one relief tube (9) pressure chamber communicating pipe (7), relief valve (10) is housed on the relief tube (9), the U-shaped pipe (11) that is connected with extraction air chamber communicating pipe (5) is housed exposing the port pressure chamber communicating pipe (7), be marked with in the U-shaped pipe (11) and show a liquid (12), be marked with at the U-shaped pipe (11) that connects extraction air chamber communicating pipes (5) one side and prevent the too high warning line of differential pressure of atmospheric pressure (13);
D. gas pumping pipe (3) is connected the gas pumping pipe network and carry out extraction, extraction along with gas, the pressure decreased of extraction air chamber (1), outside air enters pressure chamber (6), pressure in the pressure chamber (6) is raise, under the effect of two pressure reduction, air pressure entered through pressure chamber communicating pipe (7), will show that a liquid (12) is to (5) the direction pushing of extraction air chamber communicating pipe;
E. when connect in the U-shaped pipe (11) extraction air chamber communicating pipe (5) one sides show a liquid (12) highly above warning line (13) time, open relief valve (10) and carry out pressure release, close relief valve (10) when showing after a liquid (12) fluid column is stablized.
2. according to claim 1 the equal press seal hole method of mash gas pumping drilling, it is characterized in that: described relief valve (10) is for manual pressure release or by sensor control releasing pressure automatically.
3. according to claim 1 the equal press seal hole method of mash gas pumping drilling, it is characterized in that: a described liquid that shows is the larger organic liquid mixture body of mercury or density.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210505043.6A CN102943687B (en) | 2012-12-03 | 2012-12-03 | Pressure equalizing and hole sealing method for gas extraction drilling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210505043.6A CN102943687B (en) | 2012-12-03 | 2012-12-03 | Pressure equalizing and hole sealing method for gas extraction drilling |
Publications (2)
| Publication Number | Publication Date |
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| CN102943687A true CN102943687A (en) | 2013-02-27 |
| CN102943687B CN102943687B (en) | 2014-08-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210505043.6A Expired - Fee Related CN102943687B (en) | 2012-12-03 | 2012-12-03 | Pressure equalizing and hole sealing method for gas extraction drilling |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107420126A (en) * | 2017-07-26 | 2017-12-01 | 柴兆喜 | Pressure circulation mine gas extraction system |
| WO2019105161A1 (en) * | 2017-11-28 | 2019-06-06 | 中国矿业大学 | Bedding borehole-based gas extraction method capable of avoiding air leakage |
| CN110107346A (en) * | 2019-06-21 | 2019-08-09 | 三门前庭机械科技有限公司 | Dedicated automatic gas-removing system in a kind of coal mine hole |
| CN111734488A (en) * | 2020-05-14 | 2020-10-02 | 淮北矿业股份有限公司 | Goaf enclosure wall pressure regulating air chamber |
| CN113217079A (en) * | 2021-03-01 | 2021-08-06 | 柴兆喜 | Pressure-equalizing circulating mine gas extraction coal hole |
| CN114718517A (en) * | 2022-03-24 | 2022-07-08 | 国能神东煤炭集团有限责任公司 | Method for recycling butterfly valve on gas extraction pipe in coal mining operation |
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| RU2394159C1 (en) * | 2009-07-06 | 2010-07-10 | Общество с ограниченной ответственностью "РосЭнергоГаз" | Procedure for degassing gas bearing ore and coal deposits at development of minerals |
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| CN102094670A (en) * | 2010-12-17 | 2011-06-15 | 中国神华能源股份有限公司 | Method for replacing mine goaf gas with carbon dioxide |
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| CN102704984A (en) * | 2012-04-28 | 2012-10-03 | 中国矿业大学 | Borehole high-concentration gas extraction and drainage method and device thereof |
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2012
- 2012-12-03 CN CN201210505043.6A patent/CN102943687B/en not_active Expired - Fee Related
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| SU1048125A1 (en) * | 1982-03-12 | 1983-10-15 | Ленинградский Ордена Ленина,Ордена Октябрьской Революции И Ордена Трудового Красного Знамени Горный Институт Им.Г.В.Плеханова | Blast hole sealing arrangement |
| RU2221146C1 (en) * | 2002-07-17 | 2004-01-10 | Институт горного дела СО РАН (статус государственного учреждения) | Device sealing well-head |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107420126A (en) * | 2017-07-26 | 2017-12-01 | 柴兆喜 | Pressure circulation mine gas extraction system |
| CN107420126B (en) * | 2017-07-26 | 2024-03-29 | 柴兆喜 | Pressure equalizing circulation mine gas extraction system |
| WO2019105161A1 (en) * | 2017-11-28 | 2019-06-06 | 中国矿业大学 | Bedding borehole-based gas extraction method capable of avoiding air leakage |
| CN110107346A (en) * | 2019-06-21 | 2019-08-09 | 三门前庭机械科技有限公司 | Dedicated automatic gas-removing system in a kind of coal mine hole |
| CN111734488A (en) * | 2020-05-14 | 2020-10-02 | 淮北矿业股份有限公司 | Goaf enclosure wall pressure regulating air chamber |
| CN113217079A (en) * | 2021-03-01 | 2021-08-06 | 柴兆喜 | Pressure-equalizing circulating mine gas extraction coal hole |
| CN114718517A (en) * | 2022-03-24 | 2022-07-08 | 国能神东煤炭集团有限责任公司 | Method for recycling butterfly valve on gas extraction pipe in coal mining operation |
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|---|---|
| CN102943687B (en) | 2014-08-20 |
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Granted publication date: 20140820 Termination date: 20191203 |
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