CN104612748A - Coal-mass gas extraction method and device - Google Patents

Coal-mass gas extraction method and device Download PDF

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Publication number
CN104612748A
CN104612748A CN201510057138.XA CN201510057138A CN104612748A CN 104612748 A CN104612748 A CN 104612748A CN 201510057138 A CN201510057138 A CN 201510057138A CN 104612748 A CN104612748 A CN 104612748A
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China
Prior art keywords
extraction
tube
drainage
hole sealing
hole
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Pending
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CN201510057138.XA
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Chinese (zh)
Inventor
张丽军
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张丽军
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Priority to CN201510057138.XA priority Critical patent/CN104612748A/en
Publication of CN104612748A publication Critical patent/CN104612748A/en
Pending legal-status Critical Current

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    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21FSAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
    • E21F7/00Methods or devices for drawing- off gases with or without subsequent use of the gas for any purpose

Abstract

The invention discloses a coal-mass gas extraction method and device. Negative pressure of a gas extraction system is led to the bottom of a gas extraction drilled hole, the utilization rate of the negative pressure of the gas extraction system is increased, the efficiency of the extraction negative pressure of gas drilled holes can be improved, the concentration of extracted gas in the gas drilled holes can be improved, the extraction time of gas drilled holes is shortened, gas can be utilized fully, and influences of gas on safety production of a coal mine are reduced greatly.

Description

A kind of coal gas pumping method and device
Technical field
The invention belongs to coal mine gas security fields, specifically, is a kind of coal gas pumping method.Present invention also offers a kind of coal gas drainage device.
Background technology
In Safety of Coal Mine Production process, be a kind ofly solve the effective way that gas affects Safety of Coal Mine Production on the in advance extraction of gas.To in the gas pumping process of highly gassy mine, owing to being subject to equipment, technology, the factor impacts such as human users, just the pipeline producing negative pressure is extend near the aperture of extraction borehole, farthest the gas in coal body can not be released, even if release a part, but extraction concentration is lower, the extraction time is longer, also easily be subject to the impact of coal body slump, boring is caused to be blocked, not only can not ensure the safety in production in colliery in the short time, the gas of releasing is answered concentration low and can not get effective utilization, most cases can only empty be arranged, not only waste good resource, contaminated environment again, cause greenhouse effect.
Summary of the invention
The invention solves the deficiencies in the prior art, provide a kind of coal gas pumping method that can improve mash gas extraction concentration.Present invention also offers a kind of coal gas drainage device.
In order to achieve the above object, the technical solution adopted in the present invention is:
A kind of coal gas pumping method, for non-friable coal body, drainage tube is laid at the bottom of the aperture of extraction borehole to hole, drainage tube front end is connected with hole sealing device, end arranges extraction secondary orifices, by the extraction of the negative pressure source capsule of mine extraction system be connected with hole sealing device, make Gas-Flow in extraction borehole at the bottom of extraction borehole hole, entered in drainage tube by extraction secondary orifices.
A kind of coal gas drainage device for said method, comprise the negative pressure source capsule be connected with mine extraction system and the hole sealing tube being arranged on extraction borehole aperture place, described negative pressure source capsule is flexibly connected with hole sealing tube, sealing material is provided with between described hole sealing tube both sides and extraction borehole, also comprise drainage tube, described drainage tube end stretches at the bottom of extraction borehole hole, and is provided with extraction secondary orifices, and drainage tube front end is connected with the hole sealing tube mouth of pipe.
Present invention also offers another kind of coal gas pumping method, for frangible coal body, drainage tube is laid at the bottom of the aperture of extraction borehole to hole, drainage tube front end is connected with hole sealing device, end arranges extraction secondary orifices, stay pipe is connected at the end of hole sealing device, and the cavity making drainage tube be positioned at hole sealing device and stay pipe to surround, prevent coal body from extruding drainage tube and blocking extraction borehole, by the extraction of the negative pressure source capsule of mine extraction system be connected with hole sealing device, make Gas-Flow in extraction borehole at the bottom of extraction borehole hole, entered in drainage tube by extraction secondary orifices.
A kind of coal gas drainage device for said method, comprise the negative pressure source capsule be connected with mine extraction system and the hole sealing tube being arranged on extraction borehole aperture place, described negative pressure source capsule is flexibly connected with hole sealing tube, sealing material is provided with between described hole sealing tube both sides and extraction borehole, also comprise drainage tube, described drainage tube end stretches at the bottom of extraction borehole hole, and be provided with extraction secondary orifices, drainage tube front end is connected with the hole sealing tube mouth of pipe, connect stay pipe at hole sealing tube end, described drainage tube is positioned at the cavity that stay pipe and hole sealing tube surround.
Further, the hole sealing tube top outside described extraction borehole is provided with detect aperture, and described negative pressure source capsule top is provided with detect aperture, for checking extraction parameter; Described negative pressure source capsule is connected by valve with hole sealing tube, and described valve is snap joint ball valve or external valve.
Described drainage tube and stay pipe are segmentation or entirety, and when drainage tube and stay pipe are segmentation, connection segment mode adopts hickey to connect, and the last one end of drainage tube is secondary orifices pipe simultaneously, install O-ring seal when drainage tube connects between interface.Described stay pipe is provided with leakage hole.The material of described drainage tube and stay pipe uses the light materials such as PVC, PE.
The present invention can improve the concentration of extracting gas out to the full extent, shortens the extraction time, reduces gas to the impact of Safety of Coal Mine Production.Due to the raising of mash gas extraction concentration, part can be directly civilian, achieves the efficiency utilization of gas, at utmost utilize resource, cut the waste, reduce the pollution to atmospheric environment.
Because fluid (middle finger methane gas of the present invention) the pressure change within the scope of certain volume is not along becoming but gradual change, and at the coal body close to tunnel due to pressure release to a certain extent, gas bearing capacity wherein decreases, and be only real high density and high pressure gas source at distance tunnel non-pressure release coal body far away, thus form negative pressure and more effectively could realize gas pumping going deep into the region at the bottom of hole.
The present invention is by the bottom of the hole that the negative pressure of gas drainage system caused mash gas pumping drilling, improve the utilization rate of extraction system negative pressure, both the efficiency of gas drilling extraction negative pressure can have been improved, the concentration of gas drilling mash gas extraction can be improved again, shorten the gas drilling extraction time, both can make full use of gas, greatly can reduce the impact of gas on Safety of Coal Mine Production again.
Accompanying drawing explanation
Structural representation under the non-friable state of Fig. 1 coal body.
1, negative pressure source capsule 2, hole sealing tube 3, sealing material 4, detect aperture 5, drainage tube 6, extraction borehole 7, extraction secondary orifices 8, valve 9, coal body.
Structural representation under the frangible state of Fig. 2 coal body.
1, negative pressure source capsule 2, hole sealing tube 3, sealing material 4, detect aperture 5, drainage tube 6, extraction borehole 7, extraction secondary orifices 8, valve 9, coal body 10, stay pipe 11, leakage hole.
Detailed description of the invention
Below in conjunction with accompanying drawing, the invention will be further described:
embodiment 1
As shown in Figure 1, a kind of coal gas pumping method, for non-friable coal body, drainage tube 5 is laid at the bottom of the aperture of extraction borehole 6 to hole, drainage tube 5 front end is connected with hole sealing device, and end arranges extraction secondary orifices 7, by the extraction of the negative pressure source capsule 1 of mine extraction system be connected with hole sealing device, make Gas-Flow in extraction borehole at the bottom of extraction borehole 6 hole, entered in drainage tube 5 by extraction secondary orifices 7.
A kind of coal gas drainage device for said method, comprise the negative pressure source capsule 1 be connected with mine extraction system and the hole sealing tube 2 being arranged on extraction borehole 6 aperture place, described negative pressure source capsule 1 is flexibly connected with hole sealing tube 2, sealing material 3 is provided with between described hole sealing tube 2 both sides and extraction borehole 6, also comprise drainage tube 5, described drainage tube 5 end stretches at the bottom of extraction borehole 6 hole, and is provided with extraction secondary orifices 7, and drainage tube 5 front end is connected with hole sealing tube 2 mouth of pipe.
Further, hole sealing tube 2 top outside described extraction borehole 6 is provided with detect aperture 4, and described negative pressure source capsule 1 top is provided with detect aperture 4; Described negative pressure source capsule 1 is connected by valve 8 with hole sealing tube 2, and described valve 8 is snap joint ball valve or external valve.
Described drainage tube 5 is segmentation or entirety, and when drainage tube 5 is for segmentation, connection segment mode adopts hickey to connect, and installs O-ring seal when drainage tube 5 connects between interface, and the last one end of drainage tube 5 is secondary orifices pipe simultaneously.Described drainage tube 5 material uses the light materials such as PVC, PE.
embodiment 2
As shown in Figure 2, a kind of coal gas pumping method, for frangible coal body, drainage tube 5 is laid at the bottom of the aperture of extraction borehole 6 to hole, drainage tube 5 front end is connected with hole sealing device, end arranges extraction secondary orifices 7, stay pipe 10 is connected at the end of hole sealing device, and the cavity making drainage tube 5 be positioned at hole sealing device and stay pipe 10 to surround, prevent coal body from extruding drainage tube 5 and blocking extraction borehole 6, by the extraction of the negative pressure source capsule 1 of mine extraction system be connected with hole sealing device, make Gas-Flow in extraction borehole 6 at the bottom of extraction borehole 6 hole, entered in drainage tube by extraction secondary orifices 7.
A kind of coal gas drainage device for said method, comprise the negative pressure source capsule 1 be connected with mine extraction system and the hole sealing tube 2 being arranged on extraction borehole 6 aperture place, described negative pressure source capsule 1 is flexibly connected with hole sealing tube 2, sealing material 3 is provided with between described hole sealing tube 2 both sides and extraction borehole 6, also comprise drainage tube 5, described drainage tube 5 end stretches at the bottom of extraction borehole 6 hole, and be provided with extraction secondary orifices 7, drainage tube 5 front end is connected with hole sealing tube 2 mouth of pipe, stay pipe 10 is connected at hole sealing tube 2 end, described drainage tube 5 is positioned at the cavity that stay pipe 10 surrounds with hole sealing tube 2.
Further, hole sealing tube 2 top outside described extraction borehole 6 is provided with detect aperture 4, and described negative pressure source capsule 1 top is provided with detect aperture 4; Described negative pressure source capsule 1 is connected by valve 8 with hole sealing tube 2, and described valve 8 is snap joint ball valve or extraneous valve.
Described drainage tube 5 and stay pipe 10 are segmentation or entirety, and when drainage tube 5 and stay pipe 10 are segmentation, connection segment mode adopts hickey to connect, and installs O-ring seal when drainage tube connects between hickey, and the last one end of drainage tube 5 is secondary orifices pipe simultaneously.Described stay pipe 10 is provided with leakage hole 11.The material of described drainage tube 5 and stay pipe 10 uses the light materials such as PVC, PE.
Using method of the present invention:
After coal body 9 has set extraction borehole 6 with rig, according to coal body different conditions, using method is also different.
For non-friable coal body, first hole sealing tube 2 installation is filled sealing material 3 in coal body 9 gap with hole sealing tube 2, make between hole sealing tube 2 and coal body 10 tightly air tight; Then being penetrated into from hole sealing tube 2 by drainage tube 5 in extraction borehole 6 (has extraction secondary orifices one end first to penetrate), progressively extends until drainage tube 6 has secondary orifices 7 one end to extend at the bottom of hole, or according to the built-in length of drilling depth determination drainage tube.
For frangible coal body, before after Completion of Drilling Hole, coal body 9 does not also drop on a large scale, stay pipe 10 is progressively extended at the bottom of extraction borehole 6 hole, or according to the built-in length of Completion of Drilling Hole situation degree of depth determination stay pipe, before stay pipe 10 arrives object length during certain length, reserved hole sealing tube length need be needed according to sealing of hole, until stay pipe all stretches to target length, sealing material 3 sealing of hole be utilized to sealing of hole pipeline section.
The hole sealing tube 2 and drainage tube 5 of extraction borehole 6 outside stay and establishes detect aperture 4, for the detection of extraction parameter, normal condition ball valve 8 shutoff; After drainage tube 5 has stretched into, the tip gap of aperture place to drainage tube 5 and hole sealing tube 2 is carried out shutoff tight.After installing coal gas drainage device, drainage tube 5 is connected with mine extraction system, provides negative pressure source can realize the extraction of gas in boring.
After extraction end-of-job, can reclaim the drainage tube 5 used according to the reservation situation of drainage tube 5 and stay pipe 10, the particularly drainage tube 5 of digging laneway and stay pipe 10, along with the extension of tunnelling, progressively the drainage tube 5 of use and stay pipe 10 can be reclaimed, thus realize reusing of pipeline.

Claims (10)

1. a coal gas pumping method, it is characterized in that, drainage tube is laid at the bottom of the aperture of extraction borehole to hole, drainage tube front end is connected with hole sealing device, end arranges extraction secondary orifices, by the extraction of the negative pressure source capsule of mine extraction system be connected with hole sealing device, make Gas-Flow in extraction borehole at the bottom of extraction borehole hole, entered in drainage tube by extraction secondary orifices.
2. coal gas pumping method according to claim 1, is characterized in that, connects stay pipe at the end of hole sealing device, and the cavity making drainage tube be positioned at hole sealing device and stay pipe to surround, prevent coal body from extruding drainage tube and blocking extraction borehole.
3. the device for coal gas pumping method according to claim 1, comprise the negative pressure source capsule be connected with mine extraction system and the hole sealing tube being arranged on extraction borehole aperture place, described negative pressure source capsule is flexibly connected with hole sealing tube, sealing material is provided with between described hole sealing tube both sides and extraction borehole, it is characterized in that, also comprise drainage tube, described drainage tube end stretches at the bottom of extraction borehole hole, and being provided with extraction secondary orifices, drainage tube front end is connected with the hole sealing tube mouth of pipe.
4. coal gas drainage device according to claim 3, is characterized in that, the hole sealing tube top outside described extraction borehole is provided with detect aperture.
5. coal gas drainage device according to claim 3, is characterized in that, described negative pressure source capsule top is provided with detect aperture.
6. coal gas drainage device according to claim 3, is characterized in that, described negative pressure source capsule is connected by valve with hole sealing tube.
7. coal gas drainage device according to claim 6, is characterized in that, described valve is snap joint ball valve or external valve.
8. coal gas drainage device according to claim 3, is characterized in that, is also connected with stay pipe at described hole sealing tube end, and described drainage tube is positioned at the cavity that stay pipe and hole sealing tube surround.
9. coal gas drainage device according to claim 8, is characterized in that, described stay pipe is provided with leakage hole.
10. the coal gas drainage device according to any one of claim 3 or 8 or 9, it is characterized in that, described drainage tube and stay pipe are segmentation or entirety, and described connection segment mode adopts hickey to connect, and installs O-ring seal between hickey.
CN201510057138.XA 2015-02-04 2015-02-04 Coal-mass gas extraction method and device Pending CN104612748A (en)

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Publication number Priority date Publication date Assignee Title
CN109736878A (en) * 2019-01-11 2019-05-10 微山金源煤矿 It is a kind of nobody automatic mash gas extraction system
CN111175467A (en) * 2020-03-09 2020-05-19 山东科技大学 Negative pressure extraction and moistening integrated test method under true triaxial stress

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109736878A (en) * 2019-01-11 2019-05-10 微山金源煤矿 It is a kind of nobody automatic mash gas extraction system
CN111175467A (en) * 2020-03-09 2020-05-19 山东科技大学 Negative pressure extraction and moistening integrated test method under true triaxial stress

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Application publication date: 20150513