Modelling and analysis of coalbed methane drainage quality in penetrating-strata boreholes considering air leakage
The quality and efficiency of coalbed methane (CBM) drainage are critical for the safe production of coal mining enterprises in China. Air leakage should be prevented during CBM drainage because it can reduce drainage concentration and induce produce accidents such as coal seam spontaneous combustio...
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| Format: | Article |
| Language: | English |
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Taylor & Francis Group
2025-12-01
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| Series: | Geomatics, Natural Hazards & Risk |
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| Online Access: | https://www.tandfonline.com/doi/10.1080/19475705.2024.2445628 |
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| author | Lizhen Zhao Tianxuan Hao Dengke Wang Jianping Wei Yang Du Baisheng Nie Jie Chen Zhen Li Yiju Tang Fukai Zhang Bowen Dong Yuling Xia |
| author_facet | Lizhen Zhao Tianxuan Hao Dengke Wang Jianping Wei Yang Du Baisheng Nie Jie Chen Zhen Li Yiju Tang Fukai Zhang Bowen Dong Yuling Xia |
| author_sort | Lizhen Zhao |
| collection | DOAJ |
| description | The quality and efficiency of coalbed methane (CBM) drainage are critical for the safe production of coal mining enterprises in China. Air leakage should be prevented during CBM drainage because it can reduce drainage concentration and induce produce accidents such as coal seam spontaneous combustion. However, existing theoretical models for CBM drainage do not consider the air leakage effect. This study sets up a gas–solid coupling theoretical model in which the air leakage effect is taken into account as well as gas diffusion and gas seepage. The influencing factors on the drainage quality of CBM were analyzed using numerical simulation. The results show that the CBM drainage quality linearly improves with the increase of drainage negative pressure, while increasing initial CBM pressure can linearly enhance drainage quality at the early drainage stage. The CBM drainage quality exponentially increases with Langmuir content and exponentially decreases with Langmuir pressure. With the increase of coal’s initial permeability, CBM drainage quality exponentially increases at the early drainage stage but exponentially decreases at the middle and late drainage stages. The new theoretical model effectively depicts the drop in CBM drainage quality and the increase of air leakage during the entire drainage process. |
| format | Article |
| id | doaj-art-67af6bc53ffa495f8245371796b850f5 |
| institution | Kabale University |
| issn | 1947-5705 1947-5713 |
| language | English |
| publishDate | 2025-12-01 |
| publisher | Taylor & Francis Group |
| record_format | Article |
| series | Geomatics, Natural Hazards & Risk |
| spelling | doaj-art-67af6bc53ffa495f8245371796b850f52025-01-27T15:25:41ZengTaylor & Francis GroupGeomatics, Natural Hazards & Risk1947-57051947-57132025-12-0116110.1080/19475705.2024.2445628Modelling and analysis of coalbed methane drainage quality in penetrating-strata boreholes considering air leakageLizhen Zhao0Tianxuan Hao1Dengke Wang2Jianping Wei3Yang Du4Baisheng Nie5Jie Chen6Zhen Li7Yiju Tang8Fukai Zhang9Bowen Dong10Yuling Xia11College of Safety Science and Engineering, Henan Polytechnic University, Jiaozuo, Henan, ChinaCollege of Safety Science and Engineering, Henan Polytechnic University, Jiaozuo, Henan, ChinaCollege of Safety Science and Engineering, Henan Polytechnic University, Jiaozuo, Henan, ChinaCollege of Safety Science and Engineering, Henan Polytechnic University, Jiaozuo, Henan, ChinaCollege of Safety Science and Engineering, Henan Polytechnic University, Jiaozuo, Henan, ChinaState Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing, ChinaState Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing, ChinaCollege of Safety and Emergency Management Engineering, Taiyuan University of Technology, Taiyuan, ChinaSchool of Municipal and Environmental Engineering, Henan University of Urban Construction, Pingdingshan, Henan, ChinaState Key Laboratory Cultivation Base for Gas Geology and Gas Control, Henan Polytechnic University, Jiaozuo, Henan, ChinaCollege of Safety Science and Engineering, Henan Polytechnic University, Jiaozuo, Henan, ChinaState Key Laboratory Cultivation Base for Gas Geology and Gas Control, Henan Polytechnic University, Jiaozuo, Henan, ChinaThe quality and efficiency of coalbed methane (CBM) drainage are critical for the safe production of coal mining enterprises in China. Air leakage should be prevented during CBM drainage because it can reduce drainage concentration and induce produce accidents such as coal seam spontaneous combustion. However, existing theoretical models for CBM drainage do not consider the air leakage effect. This study sets up a gas–solid coupling theoretical model in which the air leakage effect is taken into account as well as gas diffusion and gas seepage. The influencing factors on the drainage quality of CBM were analyzed using numerical simulation. The results show that the CBM drainage quality linearly improves with the increase of drainage negative pressure, while increasing initial CBM pressure can linearly enhance drainage quality at the early drainage stage. The CBM drainage quality exponentially increases with Langmuir content and exponentially decreases with Langmuir pressure. With the increase of coal’s initial permeability, CBM drainage quality exponentially increases at the early drainage stage but exponentially decreases at the middle and late drainage stages. The new theoretical model effectively depicts the drop in CBM drainage quality and the increase of air leakage during the entire drainage process.https://www.tandfonline.com/doi/10.1080/19475705.2024.2445628Gas drainagecoalbed methanecoal mining safetygas–solid coupling modelair leakagepenetrating-strata boreholes |
| spellingShingle | Lizhen Zhao Tianxuan Hao Dengke Wang Jianping Wei Yang Du Baisheng Nie Jie Chen Zhen Li Yiju Tang Fukai Zhang Bowen Dong Yuling Xia Modelling and analysis of coalbed methane drainage quality in penetrating-strata boreholes considering air leakage Geomatics, Natural Hazards & Risk Gas drainage coalbed methane coal mining safety gas–solid coupling model air leakage penetrating-strata boreholes |
| title | Modelling and analysis of coalbed methane drainage quality in penetrating-strata boreholes considering air leakage |
| title_full | Modelling and analysis of coalbed methane drainage quality in penetrating-strata boreholes considering air leakage |
| title_fullStr | Modelling and analysis of coalbed methane drainage quality in penetrating-strata boreholes considering air leakage |
| title_full_unstemmed | Modelling and analysis of coalbed methane drainage quality in penetrating-strata boreholes considering air leakage |
| title_short | Modelling and analysis of coalbed methane drainage quality in penetrating-strata boreholes considering air leakage |
| title_sort | modelling and analysis of coalbed methane drainage quality in penetrating strata boreholes considering air leakage |
| topic | Gas drainage coalbed methane coal mining safety gas–solid coupling model air leakage penetrating-strata boreholes |
| url | https://www.tandfonline.com/doi/10.1080/19475705.2024.2445628 |
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