CN101029574A - Long standpipe gas extraction in worked-out section - Google Patents
Long standpipe gas extraction in worked-out section Download PDFInfo
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- CN101029574A CN101029574A CN 200710021159 CN200710021159A CN101029574A CN 101029574 A CN101029574 A CN 101029574A CN 200710021159 CN200710021159 CN 200710021159 CN 200710021159 A CN200710021159 A CN 200710021159A CN 101029574 A CN101029574 A CN 101029574A
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- long standpipe
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- standpipe
- air way
- goaf
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Abstract
This is a gas extraction method via a long vertical pipe at goaf zone. Two holes are made on the top and bottom board of the air gallery at the working face. Sectional metal pipes are linked together to form a long vertical pipe, with the top sealed and inserted into the hole on the top board, and the bottom inserted into the bottom board and concreted. Small holes distributes on the pipe wall and been wrapped with pack. The pipe is connected to the extraction network. With 5m of the pipe getting into the goaf zone, start extraction; with the previous pipe getting into the goaf zone at 30m, and the following one at 5m, shut the previous pipe and open the following one. So realize a continuous extraction and decrease the gas concentration at the solid angle. The gas concentration could be controlled under 0.6%.
Description
Technical field
The present invention relates to the long standpipe gas extraction in worked-out section method, be particularly useful for the gas pumping of coal work face goaf in the coal mine production safety.
Background technology
The contiguous coal of coal-face (rock) layer and goaf are lost coal gas and are entered the goaf, the direction of leaking out along the goaf is gushed out from upper corner, often cause the upper corner gas density to transfinite, even cause the return gas density to transfinite, have a strong impact on the coal-face safety in production.In the goaf, because the stream that leaked out influences, gas is the vertical layered distribution that is along the goaf, and gas density is with increasing highly gradually in caving zone.The air entry of traditional goaf pipe laying gas pumping generally is arranged in gob floor or air entry is raised to apart from the position of base plate 1～2m, this regional gas density is on the low side, cause traditional goaf pipe laying extraction concentration low (concentration mostly is 2～5%), weak effect, the upper corner gas density often transfinites, have influence on the ordinary production of work plane, and cause personal safety.
Summary of the invention
The objective of the invention is weak point, provide that a kind of method is simple, easy construction, the effective long standpipe gas extraction in worked-out section method of extraction at prior art.
Long standpipe gas extraction in worked-out section method of the present invention:
1) be communicated with pipe network along air way near laying the gas pumping of being made up of main, arm and gate valve on the base plate of last group, main is provided with a reducing tee that is connected and is controlled by gate valve with arm every 25m;
2) with rig to coal-face air way base plate construction drill downward vertically, and at air way top board correspondence position construction drill vertically upward;
3) construction enters the long riser top sealing in the boring of air way top board by the long standpipe that metal tube is formed by connecting piecemeal in the boring up and down of roof and floor correspondence, and its tube wall top has some apertures, and the parcel gauze; The long standpipe position slip casting that enters in the boring of air way base plate is fixed;
4) the long standpipe bottom extraction pipe network interior with being located at air way is connected gate valve control;
5) along with coal-face is pushed ahead, after long standpipe entered goaf 5m, the gate valve of opening the long standpipe of control carried out gas pumping, and the gas pumping negative pressure is that 5～10KPa, mixed traffic are 30～60m
3/ min;
When 6) previous long standpipe entered goaf 30m, a back long standpipe entered goaf 5m, closed the gate valve that connects on the previous long standpipe pipe network, opened the gate valve on the back long standpipe arm, realized the continuous extraction of the long standpipe in goaf.
Described drilling depth of constructing downward vertically to coal-face air way base plate is that 1.5～2m, diameter are 150mm; The drilling depth that described air way top board is constructed vertically upward is 5～7m, diameter 150mm;
The situation of, extraction weak effect low at goaf pipe laying gas pumping concentration, in conjunction with the migration of erecting dense individual props band gas and the gas density regularity of distribution, adopt this method, goaf pipe laying mash gas extraction concentration is brought up to more than 10% by original 3～5%, and the gas pumping amount is by 1～3m
3/ min brings up to 5m
3More than/the min, reduced goaf gas and gushed out to upper corner, reduced the upper corner gas density, its concentration can be controlled in below 0.6%, the return gas density can descend 0.1～0.2%, improve stope gas pumping rate greatly, improved the gas density of goaf pipe laying extraction, increased the gas pumping scale, improve the effect of goaf pipe laying extraction, having stopped the upper corner gas density transfinites, and has realized the safe working of work plane, has practicality widely in this area.
Description of drawings
Fig. 1 is a goaf of the present invention long standpipe plane figure schematic diagram.
Fig. 2 is a goaf of the present invention long standpipe facade schematic layout pattern.
Among the figure: 1-air way, 2-main, the long standpipe of 3-, 4-goaf, 5-work plane, 6-air way top board, 7-air way base plate, 8-air entry.
The specific embodiment
The invention will be further described below in conjunction with embodiment in the accompanying drawing:
Long standpipe gas extraction in worked-out section method of the present invention, according to roof rock stratum movement law and caving zone height, determine the position of air entry, be communicated with pipe network along air way 1 near laying the gas pumping of forming by main 2, arm and gate valve on the base plate of last group, main is provided with a reducing tee every 25m, and the arm diameter is the steel pipe of 108mm, and long is 30m, link to each other with main 2 by reducing tee, and be provided with the control gate valve near the main downlink connection section; Dry tube diameter is the steel pipe of 216mm.To coal-face air way base plate 7 construction drill downward vertically, drilling depth is that 1.5～2m, diameter are 150mm with rig; At air way top board 6 correspondence positions construction drill vertically upward, drilling depth is 5～7m, diameter 150mm.The long standpipe 3 that construction is formed by connecting piecemeal by metal tube in the boring up and down of roof and floor correspondence, long standpipe diameter 108mm adopts the external connection screw joint to be formed by connecting by the steel pipe of every long 2m, and its effective length is 7～10m, add long standpipe bottom regular length, its physical length is 9～12m; Enter long standpipe 3 top seals in air way top board 6 boring, apart from the top downwards on the tube wall of long 0.5m the some diameters of cutting be the air entry 8 of 5mm aperture as long standpipe extraction, and wrap up with gauze; Long standpipe spacing 25m links to each other with main by arm.The long standpipe 3 position slip castings that enter in 7 borings of air way base plate are fixed; Long standpipe 3 bottoms are connected with extraction pipe network in being located at air way 1, and gate valve is controlled; Along with coal-face 5 is pushed ahead, after long standpipe 3 entered goaf 5m, the gate valve of opening the long standpipe 3 of control carried out gas pumping, and the gas pumping negative pressure is that 5～10kPa, mixed traffic are 30～60m
3/ min; When previous long standpipe 3 enters goaf 30m, the long standpipe 3 in back enters goaf 5m, close the gate valve that connects on previous long standpipe 3 pipe networks, open the gate valve on the back long standpipe arm, close the gate valve that connects on the previous long standpipe arm, thereby realize the continuous extraction of goaf 4 long standpipes 3.
Claims (3)
1. long standpipe gas extraction in worked-out section method is characterized in that:
1) be communicated with pipe network along air way (1) near laying the gas pumping of being made up of main (2), arm and gate valve on the base plate of last group, main is provided with a reducing tee that is connected and is controlled by gate valve with arm every 25m;
2) with rig to coal-face air way base plate (7) construction drill downward vertically, and at air way top board (6) correspondence position construction drill vertically upward;
3) in the boring up and down of roof and floor correspondence the long standpipe (3) that is formed by connecting piecemeal by metal tube is installed, is entered long standpipe (3) top seal in air way top board (6) boring, its tube wall top has some apertures, and the parcel gauze; Long standpipe (3) the position slip casting that enters in air way base plate (7) boring is fixed;
4) long standpipe (3) the bottom extraction pipe network interior with being located at air way (1) is connected gate valve control;
5) along with coal-face is pushed ahead, after long standpipe (3) entered goaf (4) 5m, the gate valve of opening the long standpipe of control (3) carried out gas pumping, and the gas pumping negative pressure is that 5～10kPa, mixed traffic are 30～60m
3/ min;
When 6) previous long standpipe (3) enters goaf 30m, the long standpipe in back (3) enters goaf (4) 5m, close the gate valve that connects on previous long standpipe (3) pipe network, open the gate valve on the back long standpipe arm, realize the continuous extraction of the long standpipe in goaf.
2. long standpipe gas extraction in worked-out section method according to claim 1 is characterized in that: described drilling depth of constructing downward vertically to coal-face air way base plate (7) is that 1.5～2m, diameter are 150mm.
3. long standpipe gas extraction in worked-out section method according to claim 1 is characterized in that: the drilling depth that described air way top board (6) is constructed vertically upward is 5～7m, diameter 150mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100211591A CN101029574B (en) | 2007-04-02 | 2007-04-02 | Long standpipe gas extraction in worked-out section |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100211591A CN101029574B (en) | 2007-04-02 | 2007-04-02 | Long standpipe gas extraction in worked-out section |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101029574A true CN101029574A (en) | 2007-09-05 |
| CN101029574B CN101029574B (en) | 2010-12-22 |
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ID=38715106
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007100211591A Expired - Fee Related CN101029574B (en) | 2007-04-02 | 2007-04-02 | Long standpipe gas extraction in worked-out section |
Country Status (1)
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| CN (1) | CN101029574B (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101858227A (en) * | 2010-05-24 | 2010-10-13 | 安徽省皖北煤电集团孟庄煤矿 | Device for intensively and fast draining water in downward drainage drill hole |
| CN101915084A (en) * | 2010-08-13 | 2010-12-15 | 山西晋城无烟煤矿业集团有限责任公司 | Process for pumping and exploiting coal bed gas by together using ground well drilling and underground hole drilling |
| CN102116169A (en) * | 2011-01-27 | 2011-07-06 | 中国矿业大学 | Drainage method for pressure-relief gas baseboard stonehead of protected seam |
| CN101649740B (en) * | 2009-09-03 | 2011-08-31 | 周福宝 | Ground bored well body structure for gas extraction |
| CN102226412A (en) * | 2011-05-24 | 2011-10-26 | 中国矿业大学 | Underground dark mining drilling well gas extraction method |
| CN103411493A (en) * | 2013-08-13 | 2013-11-27 | 中国矿业大学 | Drilling and powder charging method for goaf-penetrating deep hole presplitting blasting |
| CN103758559A (en) * | 2014-01-09 | 2014-04-30 | 中国矿业大学 | Gob-side entry retaining Y-type ventilation high-position return airway drilling gas extracting method |
| CN104100291A (en) * | 2014-07-25 | 2014-10-15 | 太原理工大学 | Gob gas extraction device and method |
| CN104131831A (en) * | 2014-06-12 | 2014-11-05 | 中国矿业大学 | Coal-bed gas well vertical three-dimensional united extraction method |
| CN114609963A (en) * | 2022-03-17 | 2022-06-10 | 中煤科工集团沈阳研究院有限公司 | Intelligent data acquisition and negative pressure distribution regulation and control system and method for extraction pipe network |
-
2007
- 2007-04-02 CN CN2007100211591A patent/CN101029574B/en not_active Expired - Fee Related
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101649740B (en) * | 2009-09-03 | 2011-08-31 | 周福宝 | Ground bored well body structure for gas extraction |
| CN101858227A (en) * | 2010-05-24 | 2010-10-13 | 安徽省皖北煤电集团孟庄煤矿 | Device for intensively and fast draining water in downward drainage drill hole |
| CN101915084A (en) * | 2010-08-13 | 2010-12-15 | 山西晋城无烟煤矿业集团有限责任公司 | Process for pumping and exploiting coal bed gas by together using ground well drilling and underground hole drilling |
| CN101915084B (en) * | 2010-08-13 | 2011-05-11 | 山西晋城无烟煤矿业集团有限责任公司 | Process for pumping and exploiting coal bed gas by using ground well drilling and underground hole drilling |
| CN102116169A (en) * | 2011-01-27 | 2011-07-06 | 中国矿业大学 | Drainage method for pressure-relief gas baseboard stonehead of protected seam |
| CN102226412B (en) * | 2011-05-24 | 2013-06-05 | 中国矿业大学 | Underground dark mining drilling well gas extraction method |
| CN102226412A (en) * | 2011-05-24 | 2011-10-26 | 中国矿业大学 | Underground dark mining drilling well gas extraction method |
| CN103411493A (en) * | 2013-08-13 | 2013-11-27 | 中国矿业大学 | Drilling and powder charging method for goaf-penetrating deep hole presplitting blasting |
| CN103758559A (en) * | 2014-01-09 | 2014-04-30 | 中国矿业大学 | Gob-side entry retaining Y-type ventilation high-position return airway drilling gas extracting method |
| CN103758559B (en) * | 2014-01-09 | 2016-07-27 | 中国矿业大学 | Gob-side entry retaining Y-type ventilation high position return airway hole pumping and mining gas method |
| CN104131831A (en) * | 2014-06-12 | 2014-11-05 | 中国矿业大学 | Coal-bed gas well vertical three-dimensional united extraction method |
| CN104131831B (en) * | 2014-06-12 | 2016-10-12 | 中国矿业大学 | A kind of coal bed gas well three-dimensional associating pumping method up and down |
| CN104100291A (en) * | 2014-07-25 | 2014-10-15 | 太原理工大学 | Gob gas extraction device and method |
| CN114609963A (en) * | 2022-03-17 | 2022-06-10 | 中煤科工集团沈阳研究院有限公司 | Intelligent data acquisition and negative pressure distribution regulation and control system and method for extraction pipe network |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101029574B (en) | 2010-12-22 |
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Owner name: QI'NAN COAL MINE, HUAIBEI MINING CO., LTD. Free format text: FORMER NAME: QINAN COAL MINE, COAL INDUSTRY CO., LTD., HUAIBEI MINING INDUSTRY GROUP |
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| CP01 | Change in the name or title of a patent holder |
Address after: 234115, Anhui, Suzhou Town, Huaibei province Qixian Mining Group Coal Co., Ltd. Qi Nan Coal Mine Co-patentee after: China University of Mining & Technology Patentee after: Qinan Coal, Huaibei Mining Co.,Ltd. Address before: 234115, Anhui, Suzhou Town, Huaibei province Qixian Mining Group Coal Co., Ltd. Qi Nan Coal Mine Co-patentee before: China University of Mining & Technology Patentee before: Qinan Coal Mine, Coal Industry Co., Ltd., Huaibei Mining Industry Group |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101222 Termination date: 20160402 |
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| CF01 | Termination of patent right due to non-payment of annual fee |