CN109139094B - Rolling type ground gas extraction method - Google Patents
Rolling type ground gas extraction method Download PDFInfo
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- CN109139094B CN109139094B CN201811258609.3A CN201811258609A CN109139094B CN 109139094 B CN109139094 B CN 109139094B CN 201811258609 A CN201811258609 A CN 201811258609A CN 109139094 B CN109139094 B CN 109139094B
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- gas
- mining
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- goaf
- extraction
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- 238000000605 extraction Methods 0.000 title claims abstract description 55
- 238000005096 rolling process Methods 0.000 title claims abstract description 9
- 238000005065 mining Methods 0.000 claims abstract description 57
- 239000003245 coal Substances 0.000 claims abstract description 36
- 238000012544 monitoring process Methods 0.000 claims abstract description 8
- 238000005520 cutting process Methods 0.000 claims abstract description 6
- 238000000034 method Methods 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 230000008901 benefit Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK 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
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
- E21F17/18—Special adaptations of signalling or alarm devices
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- General Factory Administration (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The invention belongs to the field of gas extraction, and particularly relates to a rolling type ground gas extraction method, which is characterized in that mining wells affected by mining, in a coal mining area and in a goaf are connected to a ground gas extraction pump station through a ground manifold to perform ground gas negative pressure extraction; the working face adopts multi-point combined gas extraction for the mining area, the coal mining area and the goaf mining well, and simultaneously, the ground gas extraction system runs in a rolling mode along with the advancing of coal cutting of the working face. The gas extraction method effectively improves the gas extraction efficiency of the working face, controls the gas concentration of the working face, the local gas concentration peak value of the upper corner and the like, monitors the gas concentration of each region in real time through the monitoring and controlling controller, ensures the safe production of a coal mine, improves the coal mining speed, and protects the driving for the safe and efficient production of the coal mine.
Description
Technical Field
The invention belongs to the field of gas extraction, and particularly relates to a coal mine gas treatment technology.
Background
Aiming at the problems of high-yield and high-efficiency working face of a low gas mine, high difficulty in excavation connection, easiness in exceeding limit of the working face and local gas and the like, a ground gas extraction technology of the high-yield and high-efficiency working face of the low gas mine is provided, a ground well drilling technology is adopted, a mining well group is communicated with a crack formed by coal mining, and a ground gas extraction pump station is used for negative pressure extraction. In the extraction process, extraction is needed in order to comprehensively control the gas concentration of the working face, the mining wells affected by mining, the mining wells exposed by coal mining and the mining wells forming the goaf by coal mining. The combined extraction method is provided.
Disclosure of Invention
The invention adopts the high-yield and high-efficiency working face gas ground extraction technology of the low-gas mine to treat the gas of the working face of the mine, in order to better control the concentration of the gas at the return airway and the local (upper corner) of the working face, reduce the air discharge, solve the gas hidden danger of a goaf formed by coal mining, completely extract the gas, and connect the wells at the deep part of the goaf, which are influenced by mining, in the mining well group and are exposed by the coal mining and the coal mining is formed in the goaf by a ground pipeline if necessary, and perform combined extraction by a ground gas extraction pump station.
The invention adopts the following technical scheme:
a rolling type ground gas extraction method is characterized in that mining wells affected by mining, in a coal mining area and in a goaf are connected to a ground gas extraction pump station through a ground manifold to perform ground gas negative pressure extraction; the working face adopts multi-point combined gas extraction for the mining area, the coal mining area and the goaf mining well, and simultaneously, the ground gas extraction system runs in a rolling mode along with the advancing of coal cutting of the working face.
And monitoring and controlling the gas emission quantity of the mining area, the gas concentration of the working face, the peak value of the local gas concentration and the gas concentration of the goaf during extraction.
By adopting the extraction method, the high-efficiency extraction of the mining well group can be fully exerted, the coal mine gas is treated, the coal mine production efficiency is improved, and the following five effects can be obtained:
1) gas emitted from a mining area is quickly extracted, the gas emission amount of a working face is reduced, and the gas concentration of the working face is controlled;
2) quickly extracting gas gushed during coal cutting, extracting the gas gushing amount to the maximum extent, and controlling the peak value of the gas concentration at the upper corner;
3) in a goaf formed by coal mining, gas is accumulated, and is extracted through a mining well in the goaf, so that the gas concentration in the goaf is controlled, and the gas hidden danger in the goaf is eliminated;
4) multi-point combined negative pressure extraction is adopted, and gas overrun is avoided;
5) and by monitoring the monitoring controller, the gas concentrations in the mining area, the coal mining area and the goaf are observed at any time.
The gas extraction method effectively improves the gas extraction efficiency of the working face, controls the gas concentration of the working face, the local gas concentration peak value of the upper corner and the like, monitors the gas concentration of each region in real time through the monitoring and controlling controller, ensures the safe production of a coal mine, improves the coal mining speed, and protects the driving for the safe and efficient production of the coal mine.
Drawings
FIG. 1 is a schematic view of a multi-point combined extraction plane;
FIG. 2 is a schematic view of a multi-point combined extraction section.
Detailed Description
The working face gas is extracted in a multi-point combined mode, and the high efficiency, the rapidness, the thoroughness and the comprehensiveness of mine gas treatment are highlighted. Along with the advancing of the working face, the combined negative pressure extraction of the mining wells in the mining area, the coal mining area and the goaf is always ensured, and the gas extraction system advances in a rolling mode. The working method is detailed as follows:
1) establishing a ground gas extraction pump station;
2) connecting mining wells affected by mining, a coal mining area and a goaf through a ground manifold;
3) the system is connected to a ground gas extraction pump station through a manifold;
4) and performing negative pressure extraction through a ground gas extraction pump station.
The invention relates to a method for extracting gas from a coal mining area, which is characterized in that mining wells affected by mining are connected to a ground gas extraction pump station through a ground manifold to perform ground negative pressure gas extraction. The steps and processes are as follows:
firstly, controlling the gas emission quantity in a mining area; secondly, quickly extracting gas emitted by cutting coal; thirdly, extracting gas accumulated in the goaf, and eliminating hidden danger of gas in the goaf; monitoring the gas concentration of each area in real time through a wellhead gas monitoring and controlling instrument; and fifthly, performing multi-point gas combined extraction on the working face, controlling the concentration of the working face and local gas, and relieving the ventilation pressure. The extraction method has the advantages that the gas extraction on the working face is efficient, rapid, thorough and comprehensive, the safe production of the coal mine is ensured, and the economic benefit of the coal mine is improved.
Claims (1)
1. A rolling type ground gas extraction method is characterized in that mining wells affected by mining, of a coal mining area and of a goaf are connected to a ground gas extraction pump station through a ground manifold to perform ground gas negative pressure extraction; the working face adopts multi-point combined gas extraction for the mining area, the coal mining area and the goaf mining well, and simultaneously, the ground gas extraction system runs in a rolling way along with the advancing of coal cutting of the working face,
the detailed working method comprises the following steps:
1) establishing a ground gas extraction pump station;
2) connecting mining wells affected by mining, a coal mining area and a goaf through a ground manifold;
3) the system is connected to a ground gas extraction pump station through a manifold;
4) negative pressure extraction is carried out through a ground gas extraction pump station,
monitoring and controlling the gas emission quantity of the mining area, the gas concentration of the working face, the peak value of the local gas concentration and the gas concentration of the goaf during extraction, quickly extracting the gas emitted from the mining area, reducing the gas emission quantity of the working face and controlling the gas concentration of the working face; quickly extracting gas gushed during coal cutting, extracting the gas gushing amount to the maximum extent, and controlling the peak value of the gas concentration at the upper corner; in a goaf formed by coal mining, gas is accumulated, and is extracted through a mining well in the goaf, so that the gas concentration in the goaf is controlled, and the gas hidden danger in the goaf is eliminated; and the multi-point combined negative pressure extraction avoids the gas overrun.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811258609.3A CN109139094B (en) | 2018-10-26 | 2018-10-26 | Rolling type ground gas extraction method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811258609.3A CN109139094B (en) | 2018-10-26 | 2018-10-26 | Rolling type ground gas extraction method |
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| Publication Number | Publication Date |
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| CN109139094A CN109139094A (en) | 2019-01-04 |
| CN109139094B true CN109139094B (en) | 2021-07-06 |
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| CN201811258609.3A Active CN109139094B (en) | 2018-10-26 | 2018-10-26 | Rolling type ground gas extraction method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110792477B (en) * | 2019-11-08 | 2022-04-08 | 徐州筑之邦工程机械有限公司 | Active detection type mining explosion-proof safety monitoring host |
| CN114165196A (en) * | 2021-12-06 | 2022-03-11 | 中国矿业大学 | Comprehensive efficient extraction method for closing coal bed gas in-situ-goaf of coal mine |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN207048739U (en) * | 2017-07-31 | 2018-02-27 | 山西晋城无烟煤矿业集团有限责任公司 | A kind of low gaseous mine gas ground extraction technology drilled well bore structure |
| CN107503789B (en) * | 2017-07-31 | 2019-07-02 | 山西晋城无烟煤矿业集团有限责任公司 | Low gaseous mine high-productivity faces gas ground extraction method |
| CN107905834A (en) * | 2017-12-20 | 2018-04-13 | 中原工学院 | A kind of hypotonic high prominent coal seam architecture gas production method |
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