Key technologies for coordinated development of coalbed methane in inclined soft coal seam groups: a case study of Aiweigou Mining Area
In order to clarify the key technologies for the coordinated development of coal and coalbed methane that are compatible with the mining conditions of inclined broken soft coal seams. Based on the characteristics of gas drainage and asymmetric mining of inclined crushed soft coal seam group gas drai...
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| Format: | Article |
| Language: | zho |
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Editorial Department of Coal Science and Technology
2024-01-01
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| Series: | Meitan kexue jishu |
| Subjects: | |
| Online Access: | http://www.mtkxjs.com.cn/article/doi/10.13199/j.cnki.cst.2023-0005 |
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| author | Yunpei LIANG Shuancheng ZHU Liang CHEN Kun ZHAO Dongling SUN Jianjie CHEN Bichuan ZHANG |
| author_facet | Yunpei LIANG Shuancheng ZHU Liang CHEN Kun ZHAO Dongling SUN Jianjie CHEN Bichuan ZHANG |
| author_sort | Yunpei LIANG |
| collection | DOAJ |
| description | In order to clarify the key technologies for the coordinated development of coal and coalbed methane that are compatible with the mining conditions of inclined broken soft coal seams. Based on the characteristics of gas drainage and asymmetric mining of inclined crushed soft coal seam group gas drainage and coal seam group, a matching coordinated development mode of coal and coalbed methane was formed in the spatiotemporal synergy of “three holes, four zones and five quantities” of asymmetric pressure relief, and the coordinated development strategy of coal and coalbed methane under asymmetric mining was clarified, and the spatiotemporal synergy mechanism of coordinated development of combined coal and coalbed methane was clarified. In view of the problem of difficulty in eliminating the first mining seam of inclined crushed soft coal seam, the construction process of long drilling under inclined crushed soft coal seam was optimized, and a wireless measurement system of electromagnetic wave while drilling of drill bit was developed, which realized higher precision anti-biasing of drilling trajectory. Aiming at the problem of lack of pertinence of surface well protection in asymmetric mining area, the temporal and spatial evolution characteristics of asymmetric mining-induced pressure relief failure were clarified, the evolution characteristics of mining-induced fractures under asymmetric mining were obtained, the safe position of wells in the surface well of inclined coal seam was determined, and a three-open casing structure in the mining area was developed that could take into account the stability and extraction efficiency of surface wells. The application results show that the “three-hole, four-zone and five-quantity” mode of spatiotemporal synergy can realize the efficient extraction of coalbed methane and ensure the balance of extraction and mining of inclined coal seam groups. The progressive extraction method of downward drilling of inclined coal seam expands the application scope of progressive extraction and solves the problem of time incoordination in the extraction process of inclined coalbed methane. The optimized stability maintenance structure of the mining surface well can adapt to the asymmetric mining effect, and realize the efficient extraction of coalbed methane from the surface well in the mining area. The above results have been popularized and applied in the Aiweigou mining area of Xinjiang Coking Coal Group, and the key technology and typical model of coalbed methane extraction that conform to the characteristics of inclined coal seams in major high-gas mining areas in Xinjiang have been initially formed. |
| first_indexed | 2024-04-25T00:08:28Z |
| format | Article |
| id | doaj.art-cfd03545b13a4f1ca1472dc034f69fb4 |
| institution | Directory Open Access Journal |
| issn | 0253-2336 |
| language | zho |
| last_indexed | 2024-04-25T00:08:28Z |
| publishDate | 2024-01-01 |
| publisher | Editorial Department of Coal Science and Technology |
| record_format | Article |
| series | Meitan kexue jishu |
| spelling | doaj.art-cfd03545b13a4f1ca1472dc034f69fb42024-03-14T03:50:43ZzhoEditorial Department of Coal Science and TechnologyMeitan kexue jishu0253-23362024-01-0152121122010.13199/j.cnki.cst.2023-00052023-0005Key technologies for coordinated development of coalbed methane in inclined soft coal seam groups: a case study of Aiweigou Mining AreaYunpei LIANG0Shuancheng ZHU1Liang CHEN2Kun ZHAO3Dongling SUN4Jianjie CHEN5Bichuan ZHANG6State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing 400044, ChinaState Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing 400044, ChinaState Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing 400044, ChinaState Key Laboratory of the Gas Disaster Detecting Preventing and Emergency Controlling, Chongqing 400037, ChinaState Key Laboratory of the Gas Disaster Detecting Preventing and Emergency Controlling, Chongqing 400037, ChinaXinjiang Coking Coal Group, Urumchi 830091, ChinaState Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing 400044, ChinaIn order to clarify the key technologies for the coordinated development of coal and coalbed methane that are compatible with the mining conditions of inclined broken soft coal seams. Based on the characteristics of gas drainage and asymmetric mining of inclined crushed soft coal seam group gas drainage and coal seam group, a matching coordinated development mode of coal and coalbed methane was formed in the spatiotemporal synergy of “three holes, four zones and five quantities” of asymmetric pressure relief, and the coordinated development strategy of coal and coalbed methane under asymmetric mining was clarified, and the spatiotemporal synergy mechanism of coordinated development of combined coal and coalbed methane was clarified. In view of the problem of difficulty in eliminating the first mining seam of inclined crushed soft coal seam, the construction process of long drilling under inclined crushed soft coal seam was optimized, and a wireless measurement system of electromagnetic wave while drilling of drill bit was developed, which realized higher precision anti-biasing of drilling trajectory. Aiming at the problem of lack of pertinence of surface well protection in asymmetric mining area, the temporal and spatial evolution characteristics of asymmetric mining-induced pressure relief failure were clarified, the evolution characteristics of mining-induced fractures under asymmetric mining were obtained, the safe position of wells in the surface well of inclined coal seam was determined, and a three-open casing structure in the mining area was developed that could take into account the stability and extraction efficiency of surface wells. The application results show that the “three-hole, four-zone and five-quantity” mode of spatiotemporal synergy can realize the efficient extraction of coalbed methane and ensure the balance of extraction and mining of inclined coal seam groups. The progressive extraction method of downward drilling of inclined coal seam expands the application scope of progressive extraction and solves the problem of time incoordination in the extraction process of inclined coalbed methane. The optimized stability maintenance structure of the mining surface well can adapt to the asymmetric mining effect, and realize the efficient extraction of coalbed methane from the surface well in the mining area. The above results have been popularized and applied in the Aiweigou mining area of Xinjiang Coking Coal Group, and the key technology and typical model of coalbed methane extraction that conform to the characteristics of inclined coal seams in major high-gas mining areas in Xinjiang have been initially formed.http://www.mtkxjs.com.cn/article/doi/10.13199/j.cnki.cst.2023-0005coalbed methane mining technologydownward boreholesurface boreholeinclined coal seammining-induced fracture |
| spellingShingle | Yunpei LIANG Shuancheng ZHU Liang CHEN Kun ZHAO Dongling SUN Jianjie CHEN Bichuan ZHANG Key technologies for coordinated development of coalbed methane in inclined soft coal seam groups: a case study of Aiweigou Mining Area Meitan kexue jishu coalbed methane mining technology downward borehole surface borehole inclined coal seam mining-induced fracture |
| title | Key technologies for coordinated development of coalbed methane in inclined soft coal seam groups: a case study of Aiweigou Mining Area |
| title_full | Key technologies for coordinated development of coalbed methane in inclined soft coal seam groups: a case study of Aiweigou Mining Area |
| title_fullStr | Key technologies for coordinated development of coalbed methane in inclined soft coal seam groups: a case study of Aiweigou Mining Area |
| title_full_unstemmed | Key technologies for coordinated development of coalbed methane in inclined soft coal seam groups: a case study of Aiweigou Mining Area |
| title_short | Key technologies for coordinated development of coalbed methane in inclined soft coal seam groups: a case study of Aiweigou Mining Area |
| title_sort | key technologies for coordinated development of coalbed methane in inclined soft coal seam groups a case study of aiweigou mining area |
| topic | coalbed methane mining technology downward borehole surface borehole inclined coal seam mining-induced fracture |
| url | http://www.mtkxjs.com.cn/article/doi/10.13199/j.cnki.cst.2023-0005 |
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