CN103075179A - Entitative coal seam gas drainage drilling hole double-pipe drainage method - Google Patents
Entitative coal seam gas drainage drilling hole double-pipe drainage method Download PDFInfo
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- CN103075179A CN103075179A CN2012105421991A CN201210542199A CN103075179A CN 103075179 A CN103075179 A CN 103075179A CN 2012105421991 A CN2012105421991 A CN 2012105421991A CN 201210542199 A CN201210542199 A CN 201210542199A CN 103075179 A CN103075179 A CN 103075179A
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- polyurethane
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- 239000003245 coal Substances 0.000 title claims abstract description 30
- 238000005553 drilling Methods 0.000 title claims abstract description 15
- 238000000034 method Methods 0.000 title claims abstract description 13
- 229920002635 polyurethane Polymers 0.000 claims abstract description 42
- 239000004814 polyurethane Substances 0.000 claims abstract description 42
- 238000007789 sealing Methods 0.000 claims abstract description 37
- 239000011083 cement mortar Substances 0.000 claims abstract description 9
- 239000002390 adhesive tape Substances 0.000 claims abstract description 7
- 238000005086 pumping Methods 0.000 claims description 43
- 238000000605 extraction Methods 0.000 claims description 29
- 201000010041 presbyopia Diseases 0.000 claims description 10
- 238000010276 construction Methods 0.000 claims description 5
- 238000007569 slipcasting Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 239000000463 material Substances 0.000 abstract description 5
- 235000019994 cava Nutrition 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 240000004859 Gamochaeta purpurea Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
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Abstract
The invention provides an entitative coal seam gas drainage drilling hole double-pipe drainage method, which is particularly applicable to a coal mine underground entitative coal seam long-distance and large-aperture gas drainage drilling hole. A gas drainage pipe is sent into the drainage drilling hole to the hole bottom, a flexible sleeve pipe with the diameter being twice the diameter of the gas drainage pipe is sheathed at the back part of the gas drainage pipe, a 3-4m pattern hole is formed at the front end of the flexible sleeve pipe, a first polyurethane double-material hole sealing bag and a second polyurethane double-material hole sealing bag are respectively and fixedly arranged in positions with distances being 4 to 5m and 22 to 23m from the front end of the flexible sleeve pipe by adhesive tapes, and the flexible sleeve pipe is sent into the drainage drilling hole after the hole sealing bags are extruded so that the second polyurethane double-material hole sealing bag is 2 to 3m away from the hole opening of the drilling hole; after the polyurethane is cured, cement mortar is filled between the two polyurethane hole sealing sections; and after the cement mortar is cured, the flexible sleeve pipe is connected into a gas drainage net for gas drainage. The method has the advantages that the structure is simple, the operation is convenient, and the problem of gas drainage flow rate reduction can be effectively solved.
Description
Technical field
The present invention relates to a kind of the coal bed gas extraction two-tube pumping method of holing, be particularly useful for the long distance in this coal seam, large aperture mash gas pumping drilling under the coal mine.
Background technology
China's coal and Gas Outburst disaster are serious, bring threat to safety in production under the coal mine.This coal bed gas extraction is one of effective means of eliminating gas danger, guarantee gas utilization.For increasing the gas pumping space, realize the efficient extraction of gas, the long distance of construction, large-diameter borehole in this coal seam of being everlasting.Yet along with the increase of mining depth, geostatic stress and gas pressure constantly increase, and large-diameter borehole gross distortion can occur under Radial Loads, caves in, at area of stress concentration even the situation that broken coal stops up the drainage tube presbyopia on a large scale can occur.If the gas pumping length of tube is shorter, fail to deliver to the extraction borehole bottom, partial collapse can appear at the boring inner segment, and the gas pumping resistance increases, and the gas pumping space reduces, and effective extraction length that causes holing reduces, and the extraction flow reduces.Behind the roadway construction, can occur stress in distance wall 10 ~ 20m position and concentrate, if in this section boring, do not take any measure, stop up drainage tube thereby broken coal can slowly enter the drainage tube presbyopia.Construct the boring of this drainage from coal seam at the scene by the phenomenons such as gas extraction flow is low, decline is fast often occurring, and the extraction borehole life-span is low, is difficult to effectively extract out this coal-bed gas, has greatly restricted the development that coal and gas are adopted technology altogether.
Summary of the invention
Technical problem: the objective of the invention is to overcome the deficiency in the prior art, provide a kind of simple, can effectively solve boring this coal bed gas extraction that gas extraction flow that the hole causes reduces two-tube pumping method of holing that collapses.
Technical scheme: of the present invention coal bed gas extraction two-tube pumping method of holing:
A, in the boring of this coal bed gas extraction that construction is finished, send into gas pumping Guan Zhikong at the bottom of, at the rear portion of gas pumping pipe suit flexible sleeve, the flexible sleeve front end has 3 ~ 4m presbyopia, gas pumping pipe whole tube section evenly has presbyopia;
B, in distance flexible sleeve front end 4 ~ 5m position with the fixing extra quality hole sealing bag one of polyurethane of adhesive tape, the extra quality hole sealing bag one of extruding polyurethane, the fixing flexible boot pipeline section of the extra quality hole sealing bag one of polyurethane is sent in the extraction borehole, in distance flexible sleeve front end 22 ~ 23m position with the fixing extra quality hole sealing bag two of polyurethane of adhesive tape, simultaneously fixedly Grouting Pipe and return pipe, the extra quality hole sealing bag two of extruding polyurethane, fixedly the flexible boot pipeline section of the extra quality hole sealing bag two of polyurethane is sent in the extraction borehole again, makes the extra quality hole sealing bag two of polyurethane apart from drilling orifice 2 ~ 3m;
After c, extra quality the mixing of polyurethane in the extra quality hole sealing bag of polyurethane, by Grouting Pipe to injected water cement mortar between the extra quality hole sealing bag one of polyurethane and the extra quality hole sealing bag two of polyurethane, until behind the return pipe overfall, stop slip casting;
D, after cement mortar is solidified, flexible sleeve is accessed the gas pumping pipe network carries out gas pumping.
The diameter of described flexible sleeve is the twice of gas pumping pipe diameter.
Beneficial effect: the present invention is directed to this coal bed gas extraction boring hole of easily collapsing; gas extraction flow is little, decline is fast; the problems such as the boring life-span is low; support the hole pumping and mining space by the gas pumping pipe of sending at the bottom of the hole; make gas pumping cover boring whole process; even localized borehole occurring caves in; gas also can outwards discharge by the drainage tube presbyopia of the hole section of not collapsing; by flexible sleeve protection drilling hole stress concentration zones; between drill hole wall and gas pumping pipe, form " isolation strip ", avoid broken coal to stop up gas pumping pipe presbyopia.The diameter of flexible sleeve is the twice of gas pumping pipe diameter, between flexible sleeve and gas pumping pipe, form an annular space, the sectional area of this annular space is 2 ~ 3 times that the gas pumping tube section amasss, greatly increased the gas pumping space, dredge the gas migration passage, promoted gas extraction flow.The method is simple, and is easy to operate, has widely practicality.
Description of drawings
Fig. 1 is of the present invention the coal bed gas extraction two-tube pumping method schematic diagram of holing.
Among the figure: 1-mash gas pumping drilling, 2-coal body, 3-gas pumping pipe, 4-flexible sleeve, 5-flexible sleeve ball valve, the extra quality hole sealing bag one of 6-polyurethane, the extra quality hole sealing bag two of 7-polyurethane, 8-cement mortar, the 9-Grouting Pipe, 10-Grouting Pipe ball valve, 11-return pipe, 12-return pipe ball valve.
The specific embodiment
The invention will be further described below in conjunction with the embodiment in the accompanying drawing:
As shown in Figure 1, of the present invention coal bed gas extraction two-tube pumping method of holing: at first in this coal seam drill site to coal body 2 mash gas pumping drilling 1 of constructing routinely, the hole depth of mash gas pumping drilling 1 and aperture are determined according to on-site actual situations, are 70m such as hole depth, and the aperture is 113mm; After this coal bed gas extraction boring 1 construction is complete, utilizes and press drilling cuttings in the wind clear opening; Gas pumping pipe 3 whole tube sections are evenly offered presbyopia, connect and deliver to extraction borehole 1 bottom by inserting mode, at gas pumping pipe 3 rear portions suit flexible sleeve 4, the diameter of flexible sleeve 4 is the twice of gas pumping pipe 3 diameters, and the front end of flexible sleeve 4 has 3 ~ 4m presbyopia; In distance flexible sleeve 4 front ends 4 ~ 5m position with the fixing extra quality hole sealing bag 1 of polyurethane of adhesive tape, extruding polyurethane extra quality hole sealing bag 1 mixes the polyurethane black and white material in the bag, and 4 sections of flexible sleeves that are fixed with the extra quality hole sealing bag 1 of polyurethane are sent in the extraction borehole 1; In distance flexible sleeve 4 front ends 22 ~ 23m position with the fixing extra quality hole sealing bag 27 of polyurethane of adhesive tape, the fixing relative position of Grouting Pipe 9 and return pipe 11 simultaneously, Grouting Pipe 9 is close to the boring lower wall, return pipe 11 is close to the boring upper wall, the extra quality hole sealing bag 27 of extruding polyurethane mixes the polyurethane black and white material in the bag, fixedly 4 sections of the flexible sleeves of the extra quality hole sealing bag 27 of polyurethane are sent in the extraction borehole 1 again, make the extra quality hole sealing bag 27 of polyurethane apart from drilling orifice 2 ~ 3m; After extra quality the solidifying of polyurethane in the extra quality hole sealing bag of polyurethane, Grouting Pipe 9 is connected grouting pump, open Grouting Pipe ball valve 10, open grouting pump, by Grouting Pipe 9 to injected water cement mortar 8 between the extra quality hole sealing bag 1 of polyurethane and the extra quality hole sealing bag 27 of polyurethane, until behind return pipe 11 overfalls, close grouting pump, close Grouting Pipe ball valve 10, return pipe ball valve 12, stop slip casting; After cement mortar 8 is solidified, with flexible sleeve 4 access gas pumping pipe networks, open flexible sleeve ball valve 5 and carry out gas pumping.
Claims (2)
1. this coal bed gas extraction two-tube pumping method of holing is characterized in that:
A, in this coal bed gas extraction that construction is finished boring (1), send into gas pumping pipe (3) at the bottom of the hole, at the rear portion of gas pumping pipe (3) suit flexible sleeve (4), flexible sleeve (4) front end has 3 ~ 4m presbyopia, and gas pumping pipe (3) whole tube section evenly has presbyopia;
B, at distance flexible sleeve (4) front end 4 ~ 5m place with the fixing extra quality hole sealing bag one (6) of polyurethane of adhesive tape, the extra quality hole sealing bag one (6) of extruding polyurethane, fixedly the flexible sleeve (4) of the extra quality hole sealing bag one (6) of polyurethane section is sent in the extraction borehole (1), at distance flexible sleeve (4) front end 22 ~ 23m place with the fixing extra quality hole sealing bag two (7) of polyurethane of adhesive tape, simultaneously fixedly Grouting Pipe (9) and return pipe (11), the extra quality hole sealing bag two (7) of extruding polyurethane, fixedly the flexible sleeve (4) of the extra quality hole sealing bag two (7) of polyurethane section is sent in the extraction borehole (1) again, makes the extra quality hole sealing bag of polyurethane two (7) apart from drilling orifice 2 ~ 3m;
After c, extra quality the mixing of polyurethane in the extra quality hole sealing bag of polyurethane, by Grouting Pipe (9) to injected water cement mortar (8) between the extra quality hole sealing bag one (6) of polyurethane and the extra quality hole sealing bag two (7) of polyurethane, until behind return pipe (11) overfall, stop slip casting;
D, after cement mortar (8) is solidified, flexible sleeve (4) access gas pumping pipe network is carried out gas pumping.
2. according to claim 1 coal bed gas extraction two-tube pumping method of holing, it is characterized in that: the diameter of described flexible sleeve (4) is the twice of gas pumping pipe (3) diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201210542199.1A CN103075179B (en) | 2012-12-14 | 2012-12-14 | Entitative coal seam gas drainage drilling hole double-pipe drainage method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210542199.1A CN103075179B (en) | 2012-12-14 | 2012-12-14 | Entitative coal seam gas drainage drilling hole double-pipe drainage method |
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| CN103075179A true CN103075179A (en) | 2013-05-01 |
| CN103075179B CN103075179B (en) | 2014-12-10 |
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Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103266913A (en) * | 2013-05-13 | 2013-08-28 | 西南石油大学 | Gas extraction method |
| CN103470212A (en) * | 2013-07-15 | 2013-12-25 | 中国矿业大学 | Device and method for active hole drilling and sealing |
| CN103742115A (en) * | 2013-12-18 | 2014-04-23 | 中国矿业大学 | Underground coal mine fracture sealing device and method |
| CN104165029A (en) * | 2013-05-20 | 2014-11-26 | 河南理工大学 | Gas extraction method for underground coal mine full-length drill hole |
| CN104389587A (en) * | 2014-10-11 | 2015-03-04 | 安徽建筑大学 | Quick measurement method of coal seam gas pressure |
| CN104612640A (en) * | 2015-01-12 | 2015-05-13 | 中国矿业大学 | Underground coal mine drilling, heat injection and hole sealing integration method |
| CN105089548A (en) * | 2015-08-11 | 2015-11-25 | 重庆市能源投资集团科技有限责任公司 | Nearly horizontal high pressure-bearing drilling sealing method and sealing structure |
| CN105696967A (en) * | 2016-01-21 | 2016-06-22 | 淮南久辉工贸有限责任公司 | Mining hole packer and hole packing method |
| CN106761725A (en) * | 2016-12-14 | 2017-05-31 | 中国矿业大学 | A kind of method that the tunnel reasonable hole sealing depth of concordant mash gas pumping drilling is determined based on coal powder quantity of bore |
| CN106884624A (en) * | 2017-03-29 | 2017-06-23 | 淮南矿业(集团)有限责任公司 | A kind of area of stress concentration crushed zone drilling and sealing device and method for sealing |
| CN109113784A (en) * | 2018-09-20 | 2019-01-01 | 中国矿业大学 | A kind of coal bed gas extraction-water filling coupling device and method |
| CN109838274A (en) * | 2019-01-25 | 2019-06-04 | 华北科技学院 | The suitable seam inclination drilling gas controlling device and method taken out after note before a kind of |
| CN110344758A (en) * | 2019-08-05 | 2019-10-18 | 湖南科技大学 | A kind of construction method of high methane pole weak seam mash gas pumping drilling |
| CN113107382A (en) * | 2021-04-16 | 2021-07-13 | 淮南矿业(集团)有限责任公司 | Large-diameter long-drill-hole casing running device and method |
| WO2022052289A1 (en) * | 2020-09-14 | 2022-03-17 | 山东科技大学 | Device having borehole protection screen pipes along full length of soft coal seam and using pressurized hole sealing, and method |
| CN114263449A (en) * | 2021-12-14 | 2022-04-01 | 中国矿业大学 | High-efficient gas drainage device based on hydraulic fracturing |
| CN114320443A (en) * | 2021-12-24 | 2022-04-12 | 安徽理工大学 | This coal seam gas drainage device |
| CN114483163A (en) * | 2022-02-11 | 2022-05-13 | 中国矿业大学 | Gas extraction method |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106609677A (en) * | 2015-10-22 | 2017-05-03 | 中铁二局集团有限公司 | A gas extraction and discharge construction method |
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Cited By (25)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103266913A (en) * | 2013-05-13 | 2013-08-28 | 西南石油大学 | Gas extraction method |
| CN103266913B (en) * | 2013-05-13 | 2016-08-03 | 西南石油大学 | A kind of gas pumping method |
| CN104165029B (en) * | 2013-05-20 | 2016-10-05 | 河南理工大学 | The gas pumping method of underground coal mine total length boring |
| CN104165029A (en) * | 2013-05-20 | 2014-11-26 | 河南理工大学 | Gas extraction method for underground coal mine full-length drill hole |
| CN103470212A (en) * | 2013-07-15 | 2013-12-25 | 中国矿业大学 | Device and method for active hole drilling and sealing |
| CN103470212B (en) * | 2013-07-15 | 2016-02-24 | 中国矿业大学 | A kind of active drilling and sealing device and method |
| CN103742115A (en) * | 2013-12-18 | 2014-04-23 | 中国矿业大学 | Underground coal mine fracture sealing device and method |
| CN103742115B (en) * | 2013-12-18 | 2016-03-23 | 中国矿业大学 | A kind of coal mine underground fracturing sealing device and method |
| CN104389587A (en) * | 2014-10-11 | 2015-03-04 | 安徽建筑大学 | Quick measurement method of coal seam gas pressure |
| CN104612640A (en) * | 2015-01-12 | 2015-05-13 | 中国矿业大学 | Underground coal mine drilling, heat injection and hole sealing integration method |
| CN104612640B (en) * | 2015-01-12 | 2017-08-29 | 中国矿业大学 | A kind of coal mine down-hole drilling heat injection and sealing of hole integral method |
| CN105089548A (en) * | 2015-08-11 | 2015-11-25 | 重庆市能源投资集团科技有限责任公司 | Nearly horizontal high pressure-bearing drilling sealing method and sealing structure |
| CN105696967A (en) * | 2016-01-21 | 2016-06-22 | 淮南久辉工贸有限责任公司 | Mining hole packer and hole packing method |
| CN106761725A (en) * | 2016-12-14 | 2017-05-31 | 中国矿业大学 | A kind of method that the tunnel reasonable hole sealing depth of concordant mash gas pumping drilling is determined based on coal powder quantity of bore |
| CN106884624A (en) * | 2017-03-29 | 2017-06-23 | 淮南矿业(集团)有限责任公司 | A kind of area of stress concentration crushed zone drilling and sealing device and method for sealing |
| CN109113784A (en) * | 2018-09-20 | 2019-01-01 | 中国矿业大学 | A kind of coal bed gas extraction-water filling coupling device and method |
| CN109113784B (en) * | 2018-09-20 | 2023-09-15 | 中国矿业大学 | Coal seam gas extraction-water injection coupling device and method |
| CN109838274A (en) * | 2019-01-25 | 2019-06-04 | 华北科技学院 | The suitable seam inclination drilling gas controlling device and method taken out after note before a kind of |
| CN110344758A (en) * | 2019-08-05 | 2019-10-18 | 湖南科技大学 | A kind of construction method of high methane pole weak seam mash gas pumping drilling |
| WO2022052289A1 (en) * | 2020-09-14 | 2022-03-17 | 山东科技大学 | Device having borehole protection screen pipes along full length of soft coal seam and using pressurized hole sealing, and method |
| CN113107382A (en) * | 2021-04-16 | 2021-07-13 | 淮南矿业(集团)有限责任公司 | Large-diameter long-drill-hole casing running device and method |
| CN114263449A (en) * | 2021-12-14 | 2022-04-01 | 中国矿业大学 | High-efficient gas drainage device based on hydraulic fracturing |
| CN114263449B (en) * | 2021-12-14 | 2022-09-16 | 中国矿业大学 | High-efficient gas drainage device based on hydraulic fracturing |
| CN114320443A (en) * | 2021-12-24 | 2022-04-12 | 安徽理工大学 | This coal seam gas drainage device |
| CN114483163A (en) * | 2022-02-11 | 2022-05-13 | 中国矿业大学 | Gas extraction method |
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Granted publication date: 20141210 |