CN108468529A - A kind of coal mine gas extraction drill hole pressure wind sealing method and device - Google Patents
A kind of coal mine gas extraction drill hole pressure wind sealing method and device Download PDFInfo
- Publication number
- CN108468529A CN108468529A CN201810501113.8A CN201810501113A CN108468529A CN 108468529 A CN108468529 A CN 108468529A CN 201810501113 A CN201810501113 A CN 201810501113A CN 108468529 A CN108468529 A CN 108468529A
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- CN
- China
- Prior art keywords
- expansion
- tube
- air hose
- expansion tube
- branch
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 238000000605 extraction Methods 0.000 title claims abstract description 40
- 238000007789 sealing Methods 0.000 title claims abstract description 31
- 239000003245 coal Substances 0.000 title claims abstract description 21
- 238000000034 method Methods 0.000 title claims abstract description 17
- 239000002360 explosive Substances 0.000 claims abstract description 14
- 238000009423 ventilation Methods 0.000 claims abstract description 5
- 230000003442 weekly effect Effects 0.000 claims abstract description 3
- 230000000694 effects Effects 0.000 claims description 7
- 238000000576 coating method Methods 0.000 claims description 6
- 239000004677 Nylon Substances 0.000 claims description 5
- 238000009954 braiding Methods 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 5
- 229920001778 nylon Polymers 0.000 claims description 5
- 239000004952 Polyamide Substances 0.000 claims description 4
- 229920004933 Terylene® Polymers 0.000 claims description 4
- 229920006231 aramid fiber Polymers 0.000 claims description 4
- 239000011248 coating agent Substances 0.000 claims description 4
- 239000000835 fiber Substances 0.000 claims description 4
- 238000009829 pitch coating Methods 0.000 claims description 4
- 229920002647 polyamide Polymers 0.000 claims description 4
- 239000005020 polyethylene terephthalate Substances 0.000 claims description 4
- 230000004888 barrier function Effects 0.000 claims description 3
- 229920001971 elastomer Polymers 0.000 claims description 3
- 230000008961 swelling Effects 0.000 claims description 2
- 238000005553 drilling Methods 0.000 description 11
- 238000002347 injection Methods 0.000 description 8
- 239000007924 injection Substances 0.000 description 8
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 238000005086 pumping Methods 0.000 description 3
- 230000008595 infiltration Effects 0.000 description 2
- 238000001764 infiltration Methods 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 230000010412 perfusion Effects 0.000 description 2
- 239000011083 cement mortar Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000007596 consolidation process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004925 denaturation Methods 0.000 description 1
- 230000036425 denaturation Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/1208—Packers; Plugs characterised by the construction of the sealing or packing means
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices, or the like
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH 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
Abstract
Include that one section of note air hose is set in the drainage tube in extraction borehole the object of the present invention is to provide a kind of coal mine gas extraction drill hole encapsulating method；The first expansion tube and the second expansion tube that can be filled is arranged in weekly interval outside drainage tube, note air hose is connected to the first expansion tube, the second expansion tube by branch, setting one is connect with note air hose between two expansion tubes simultaneously and end carries the branch of level pressure explosive valve, note air hose is connected to underground pressure air hose to the first, second expansion tube and is blown, closed cavity is formed between two expansion tubes；Continue to ventilate to the first, first expansion tube, until making the level pressure explosive valve in confined space open, stops ventilation, begin through note air hose and inject hole colloidal sol to the closed cavity between two expansion tubes, extraction borehole sealing is completed until filling.The extraction borehole encapsulating method is influenced by underground work environment small using easy to operate, can keep excellent sealing performance for a long time.
Description
Technical field
The present invention relates to control of coalmine gas device, relate in particular to a kind of coal mine gas extraction drill hole encapsulating method and
Device.
Background technology
Gas pumping is the essential measure and main path of control of coalmine gas, and extraction borehole sealing has extracting result
Prodigious influence, gas leak phenomenon is serious during being mainly shown as hole pumping and mining, and gas extraction concentration is low.This is directly resulted in very
Utilizable concentration conditions are not achieved in the gas of more coal extractions, and gas utilization rate is low, a large amount of gas discharging directly into atmosphere, not only
The huge waste of resource is caused, pollution also is caused to environment.
Current most common method for sealing is to block extraction seal section two in drilling by special-purpose assorted device or polyurethane
Then sealing of hole is realized in side in centre injection cement mortar（It is commonly called as a two stifled notes）.This method is due to by underground work environment, behaviour
Making the factors such as peopleware and slurry material proportioning stirring influences, and technics comparing is cumbersome, is extremely difficult to satisfied sealing effect
Fruit.Sealed material after hardening consolidation can form new leakage path with the influence of mining dynamical pressure, further decrease sealing
Effect, gas leakage is serious under extraction suction function.
Invention content
The object of the present invention is to provide a kind of coal mine gas extraction drill hole encapsulating method, which uses
It is easy to operate, while being influenced by underground work environment small, excellent sealing performance can be kept for a long time.
It is another object of the present invention to provide a kind of devices suitable for the above method.
To achieve the above object, a kind of coal mine gas extraction drill hole of the present invention presses wind sealing method, including,
1, one section of note air hose is set in the drainage tube in extraction borehole；
2, the first expansion tube and the second expansion tube that can be filled is arranged in weekly interval outside drainage tube, by note air hose and the first expansion
Pipe, the second expansion tube are connected to by branch, and the check valve for ventilating to expansion tube is arranged in branch end, while in two expansion tubes
Between one end of setting carry the branch of level pressure explosive valve, branch passes through drainage tube to be connected to air hose is noted,
3, note air hose is connected to underground pressure air hose, makes its expansion, the first expansion to the first expansion tube, the air-supply of the second expansion tube
Pipe, the second expansion tube swelling and drill hole inner wall squeeze, and closed cavity is formed between two expansion tubes；
4, continue to ventilate to the first, first expansion tube, until making the level pressure explosive valve in confined space open, stop ventilation, open
Begin to inject hole colloidal sol to the closed cavity between two expansion tubes by noting air hose, until filling closed cavity, completes extraction and bore
Hole seals.
Outer modified pitch coating is arranged in first, second expansion tube wall, and the larger crack of hole wall is penetrated into when expanding extruding, is improved
Plugging effect.
The method of the present invention fills expansion tube using pressure wind, realizes to the closed of borehole sealing section both sides, saves cost and side
Convenient to operate penetrates into the colloidal sol in drilling wall surface coal body hole, can effectively fill coal body hole crack, the glue formed to coal body
Knot body has certain elastic and very low infiltration coefficient, solve existing solid sealing material after extraction for a period of time by
In the defect that drilling deformation causes sealing effect to be deteriorated, excellent sealing performance can be kept for a long time.
A kind of coal mine gas extraction drill hole suitable for the above method presses wind sealing device, includes in extraction borehole
Drainage tube is equipped with one section of note air hose in drainage tube, and the drainage tube periphery is equipped at intervals with the first expansion tube that can be filled and the
Two expansion tubes, the part that note air hose corresponds respectively to the first expansion tube and the second expansion tube are respectively provided with and are pierced by from extraction tube wall
The first branch, the first branch are connected to the first expansion tube, the second expansion tube, and first branch end is equipped with check valve；Note air hose exists
Extraction tube portion between first expansion tube and the second expansion tube is equipped with a second branch being pierced by from extraction tube wall, and second
Branch end is provided with level pressure explosive valve.
The first branch is connect through threeway with pressure ventilation pipe.
First expansion tube, the second expansion tube bearing structure main body are made of nylon braiding layer, and inner wall is provided with antiseepage
Coating, outer wall are provided with modified pitch coating.
The barrier coat is rubber layer or PVC coatings.
The nylon braiding layer is the blended material of polyamide fibre, terylene, aramid fiber and polyamide fibre, terylene, aramid fiber.
The sealing device structure of the present invention is simple, easy to operate, and the method for the present invention can be utilized to realize the wind of extraction borehole
Means of press seals, sealing effect is good, it is small to be influenced by environmental change.
Description of the drawings
Fig. 1 is the structural schematic diagram of the present invention.
In figure：1- gas pumping pipes, 2- air injection pipes, the first expansion tubes of 3-, the second expansion tubes of 4-, the 5- first branchs, 6-
One branch, 8- level pressure explosive valves, 9- check valves, 10- hole colloidal sol adhesive bonds.
Specific implementation mode
The present invention will be further described below with reference to the drawings.
A kind of coal mine drainage borehole of the present invention presses wind sealing device, includes the drainage tube 1 in extraction borehole,
It is equipped with one section of air injection pipe 2 being connect with underground pressure air hose in drainage tube 1,1 periphery of the drainage tube is equipped at intervals with can fill the
One expansion tube 3 and the second expansion tube 4, air injection pipe 2 corresponds to the first expansion tube 3 respectively and the part of the second expansion tube 4 is respectively provided with one
The first branch 6 that item is pierced by from extraction tube wall.Note extraction pipe portion of the air hose between the first expansion tube 3 and the second expansion tube 4
It is arranged with the second branch 5 being pierced by from tube wall.The first branch 6 in two expansion tubes connects air injection pipe 2 through threeway；The first branch
Two end outlets be respectively provided with a check valve 9, being filled in expansion tube in seal process has compressed air with pressure, realizes pair
Effective closure of drilling.The second branch 5 between two expansion tubes connects air injection pipe 2 through threeway, and end outlet is equipped with level pressure
After level pressure explosive valve 8 is opened, adhesive bond is formed to borehole space pressure injection hole colloidal sol during borehole sealing for explosive valve 8
10, since borehole sealing section both sides have been inflated the seal of tube, hole colloidal sol can under pressure, along drilling axial dispersion
Meanwhile infiltrate into certain range drilling is radial, over time, penetration range be gradually increased and hole colloidal sol it is viscous
Degree gradually increases, until being finally stopped perfusion, can be formed with coal body after the perfusion of hole colloidal sol has preferably impervious and crushing resistance
Spawn, which is effectively improved the sealing performance of drilling and sealing section.Since hole dissolves adhesive bond
With certain elasticity, it after extraction for a period of time, can deform, be remained to drill hole inner wall crack with the denaturation of drilling
Effective closure.First expansion tube 3 and 4 bearing structure main body of the second expansion tube are made of nylon braiding layer, inner wall by rubber or
PVC coating antiseepages, outer wall are equipped with the larger crack of modified pitch coating compression processing hole wall, and gas pressure is increased in expansion tube
Meanwhile the modified pitch for expanding pipe outer wall coating can effectively penetrate into the larger crack of hole wall under pressure, further decrease
The permeability of seal section both sides hole wall coal body lays the foundation for hole colloidal sol along the radial effective infiltration of drilling.
It is by underground pressure air piping connection present apparatus air injection pipe 2, Xiang Benfa using the method for aforementioned device sealing drilling
Bright device persistently pressurizes；Expansion tube in apparatus of the present invention fills under compressed air effect expands and squeezes drill hole inner wall,
Make to form closed cavity between two expansion tubes；It expands the outer modified pitch of tube wall and penetrates into the larger crack of hole wall, realize expansion tube position
Set preliminary closure；Continue to pressurize, reaches the burst pressure of 5 terminal level pressure explosive valve 8 of the second branch；System pressure is more than explosive valve
Burst pressure opens explosive valve 8, starts to inject hole colloidal sol to the closed cavity between two expansion tubes；Hole colloidal sol is perfused
Stop until being full of closed cavity；It should be noted that pressure of the present invention expands tube material, leak stopping length, drilling directly according to both sides
The difference of diameter is adaptively adjusted.
It should be understood that：For those skilled in the art, without departing from the principle of the present invention,
Can also make it is several be similarly modified, these improvement also should be regarded as protection scope of the present invention.
Claims (7)
1. a kind of coal mine gas extraction drill hole presses wind sealing method, including,
One section of note air hose is set in the drainage tube of (1) in extraction borehole；
The first expansion tube and the second expansion tube that can be filled is arranged in (2) weekly interval outside drainage tube, by note air hose and the first expansion
Pipe, the second expansion tube are connected to by branch, and the check valve for ventilating to expansion tube is arranged in branch end, while in two expansion tubes
Between one end of setting carry the branch of level pressure explosive valve, branch passes through drainage tube to be connected to air hose is noted,
(3) will note air hose and be connected to underground pressure air hose, make its expansion, the first expansion to the first expansion tube, the air-supply of the second expansion tube
Pipe, the second expansion tube swelling and drill hole inner wall squeeze, and closed cavity is formed between two expansion tubes；
(4) continue to ventilate to the first, first expansion tube, until making the level pressure explosive valve in confined space open, stopping ventilation,
It begins through note air hose and injects hole colloidal sol to the closed cavity between two expansion tubes, until filling closed cavity, complete extraction
Borehole sealing.
2. coal mine gas extraction drill hole according to claim 1 presses wind sealing method, it is characterised in that：First, second is swollen
Outer modified pitch coating is arranged in tube expansion wall, and the larger crack of hole wall is penetrated into when expanding extruding, improves plugging effect.
3. a kind of coal mine gas extraction drill hole presses wind sealing device, it is characterised in that：Include the drainage tube in extraction borehole,
One section of note air hose is equipped in drainage tube, the drainage tube periphery is equipped at intervals with the first expansion tube that can be filled and the second expansion
Pipe, note air hose corresponds respectively to the first expansion tube and the part of the second expansion tube is respectively provided with first be pierced by from extraction tube wall
Road, the first branch are connected to the first expansion tube, the second expansion tube, and first branch end is equipped with check valve；It is swollen first to note air hose
Extraction tube portion between tube expansion and the second expansion tube is equipped with a second branch being pierced by from extraction tube wall, the second branch end
End is provided with level pressure explosive valve.
4. coal mine gas extraction drill hole according to claim 3 presses wind sealing device, it is characterised in that：The first branch
It is connect with pressure ventilation pipe through threeway.
5. coal mine gas extraction drill hole according to claim 3 presses wind sealing device, it is characterised in that：First expansion
Pipe, the second expansion tube bearing structure main body are made of nylon braiding layer, and inner wall is provided with barrier coat, and outer wall is provided with modified drip
Green coating.
6. coal mine gas extraction drill hole according to claim 3 presses wind sealing device, it is characterised in that：The barrier coat
For rubber layer or PVC coatings.
7. coal mine gas extraction drill hole according to claim 3 presses wind sealing device, it is characterised in that：The nylon braiding
Layer is the blended material of polyamide fibre, terylene, aramid fiber and polyamide fibre, terylene, aramid fiber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810501113.8A CN108468529A (en) | 2018-05-23 | 2018-05-23 | A kind of coal mine gas extraction drill hole pressure wind sealing method and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810501113.8A CN108468529A (en) | 2018-05-23 | 2018-05-23 | A kind of coal mine gas extraction drill hole pressure wind sealing method and device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108468529A true CN108468529A (en) | 2018-08-31 |
Family
ID=63261473
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810501113.8A Withdrawn CN108468529A (en) | 2018-05-23 | 2018-05-23 | A kind of coal mine gas extraction drill hole pressure wind sealing method and device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108468529A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111271022A (en) * | 2020-01-20 | 2020-06-12 | 黑龙江工业学院 | Coal mine gas extraction drill hole compressed air sealing method and sealing device |
| CN113685629A (en) * | 2021-10-26 | 2021-11-23 | 江苏景瑞农业科技发展有限公司 | Air cooling duct fast connecting structure for air cooling unit |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102747980A (en) * | 2012-07-18 | 2012-10-24 | 中国矿业大学 | Expansion type multi-grade pressurized rapid hole sealing technology |
| CN103195390A (en) * | 2013-04-10 | 2013-07-10 | 山西潞安环保能源开发股份有限公司 | Mining-coal bed nearly horizontal gas extraction borehole sealing method |
| CN104343415A (en) * | 2014-10-20 | 2015-02-11 | 中煤科工集团重庆研究院有限公司 | Gas extraction drilling hole injection expanding type bag hole sealing device |
| CN105134129A (en) * | 2015-05-29 | 2015-12-09 | 河南理工大学 | Gas extraction hole sealing method based on radial strong expansion |
| CN105756599A (en) * | 2016-04-29 | 2016-07-13 | 史买林 | Coal mine two-end gas plug and middle water seal layer penetrating drill hole sealing device and method |
| CN106677740A (en) * | 2016-12-28 | 2017-05-17 | 南京铸安能源科技有限公司 | Underground coal mine one-section type water sealing device and sealing method thereof |
| CN208605160U (en) * | 2018-05-23 | 2019-03-15 | 山西潞安环保能源开发股份有限公司常村煤矿 | A kind of coal mine gas extraction drill hole pressure wind sealing device |
-
2018
- 2018-05-23 CN CN201810501113.8A patent/CN108468529A/en not_active Withdrawn
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102747980A (en) * | 2012-07-18 | 2012-10-24 | 中国矿业大学 | Expansion type multi-grade pressurized rapid hole sealing technology |
| CN103195390A (en) * | 2013-04-10 | 2013-07-10 | 山西潞安环保能源开发股份有限公司 | Mining-coal bed nearly horizontal gas extraction borehole sealing method |
| CN104343415A (en) * | 2014-10-20 | 2015-02-11 | 中煤科工集团重庆研究院有限公司 | Gas extraction drilling hole injection expanding type bag hole sealing device |
| CN105134129A (en) * | 2015-05-29 | 2015-12-09 | 河南理工大学 | Gas extraction hole sealing method based on radial strong expansion |
| CN105756599A (en) * | 2016-04-29 | 2016-07-13 | 史买林 | Coal mine two-end gas plug and middle water seal layer penetrating drill hole sealing device and method |
| CN106677740A (en) * | 2016-12-28 | 2017-05-17 | 南京铸安能源科技有限公司 | Underground coal mine one-section type water sealing device and sealing method thereof |
| CN208605160U (en) * | 2018-05-23 | 2019-03-15 | 山西潞安环保能源开发股份有限公司常村煤矿 | A kind of coal mine gas extraction drill hole pressure wind sealing device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111271022A (en) * | 2020-01-20 | 2020-06-12 | 黑龙江工业学院 | Coal mine gas extraction drill hole compressed air sealing method and sealing device |
| CN113685629A (en) * | 2021-10-26 | 2021-11-23 | 江苏景瑞农业科技发展有限公司 | Air cooling duct fast connecting structure for air cooling unit |
| CN113685629B (en) * | 2021-10-26 | 2021-12-28 | 江苏景瑞农业科技发展有限公司 | Air cooling duct fast connecting structure for air cooling unit |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20180831 |