Study on the influence of porosity of blocking air-leakage material on gas migration in goaf of cutting roof and retaining roadway
In order to study the influence of the porosity of blocking air-leakage material on the O2, CH4 gas migration and the coupling disaster of coal spontaneous combustion and gas in the goaf of working face Y-type ventilation cutting roof and retaining roadway, taking the goaf of 110 working method work...
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Editorial Office of Safety in Coal Mines
2025-05-01
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| Series: | Meikuang Anquan |
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| Online Access: | https://www.mkaqzz.com/cn/article/doi/10.13347/j.cnki.mkaq.20250202 |
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| author | Zhanyou SA Quheng YAO Yongliang YANG Lizhi TIAN Yujin QIN Shouqing LU Jie LIU |
| author_facet | Zhanyou SA Quheng YAO Yongliang YANG Lizhi TIAN Yujin QIN Shouqing LU Jie LIU |
| author_sort | Zhanyou SA |
| collection | DOAJ |
| description | In order to study the influence of the porosity of blocking air-leakage material on the O2, CH4 gas migration and the coupling disaster of coal spontaneous combustion and gas in the goaf of working face Y-type ventilation cutting roof and retaining roadway, taking the goaf of 110 working method working face of Dalong Mine as the object, based on Fluent simulation software, a simulation model for the influence of the porosity of blocking air-leakage material on the gas migration in the goaf was constructed. The simulation study was conducted on six kinds of porosity (0, 0.1, 0.2, 0.3, 0.5, 1.0) corresponding to four commonly used blocking air-leakage materials and two extreme ideal conditions of complete blocking air-leakage and complete open without blocking air-leakage in the goaf of the working face with cutting roof and retaining roadway. The research results show that the porosity of blocking air-leakage material for the cutting roof and retaining roadway has a great influence on the O2 volume fraction distribution in the goaf. With the increase of the porosity, the position and range of the scattered zone and the spontaneous combustion zone in the goaf move back and expand. The width of the spontaneous combustion zone on the side of the main air inlet roadway and the side of the cutting roof and retaining roadway increases from 12 meters and 22 meters when the porosity is 0 to 19 meters and 60 meters when the porosity is 1.0. The range on both sides of the spontaneous combustion zone increases by 58.3% and 172.7% respectively, the spontaneous combustion zone with narrow strip distribution and expanding range appeared on the roadway side of the working face. The high concentration gas accumulation area moves to the deep part of the goaf and the accumulation area decreases continuously. The accumulation starting position moves from 100 meters lagged working face to 150 meters lagged working face. With the increase of porosity, the area of coupled disaster of coal spontaneous combustion and gas is constantly expanding. Compared with the three methods of blocking air-leakage by spraying polyurethane foam, using modified cement mortars, cement mortars and filling with gangue, the area of coal spontaneous combustion and gas coupling disaster in goaf is significantly reduced, which is more conducive to the management of coal spontaneous combustion and gas coupling disasters in goaf. |
| format | Article |
| id | doaj-art-1fabe9a122964ce2b8e237341ed8a38a |
| institution | OA Journals |
| issn | 1003-496X |
| language | zho |
| publishDate | 2025-05-01 |
| publisher | Editorial Office of Safety in Coal Mines |
| record_format | Article |
| series | Meikuang Anquan |
| spelling | doaj-art-1fabe9a122964ce2b8e237341ed8a38a2025-08-20T02:25:12ZzhoEditorial Office of Safety in Coal MinesMeikuang Anquan1003-496X2025-05-01565202910.13347/j.cnki.mkaq.20250202lyMKAQ20250202Study on the influence of porosity of blocking air-leakage material on gas migration in goaf of cutting roof and retaining roadwayZhanyou SA0Quheng YAO1Yongliang YANG2Lizhi TIAN3Yujin QIN4Shouqing LU5Jie LIU6School of Mechanical and Automotive Engineering, Qingdao University of Technology, Qingdao 266520, ChinaSchool of Mechanical and Automotive Engineering, Qingdao University of Technology, Qingdao 266520, ChinaSailun Group Co., Ltd., Qingdao 266599, ChinaDalong Mine, Tiefa Coal Industry (Group) Co., Ltd., Tieling 112700, ChinaSchool of Mechanical and Automotive Engineering, Qingdao University of Technology, Qingdao 266520, ChinaSchool of Mechanical and Automotive Engineering, Qingdao University of Technology, Qingdao 266520, ChinaSchool of Mechanical and Automotive Engineering, Qingdao University of Technology, Qingdao 266520, ChinaIn order to study the influence of the porosity of blocking air-leakage material on the O2, CH4 gas migration and the coupling disaster of coal spontaneous combustion and gas in the goaf of working face Y-type ventilation cutting roof and retaining roadway, taking the goaf of 110 working method working face of Dalong Mine as the object, based on Fluent simulation software, a simulation model for the influence of the porosity of blocking air-leakage material on the gas migration in the goaf was constructed. The simulation study was conducted on six kinds of porosity (0, 0.1, 0.2, 0.3, 0.5, 1.0) corresponding to four commonly used blocking air-leakage materials and two extreme ideal conditions of complete blocking air-leakage and complete open without blocking air-leakage in the goaf of the working face with cutting roof and retaining roadway. The research results show that the porosity of blocking air-leakage material for the cutting roof and retaining roadway has a great influence on the O2 volume fraction distribution in the goaf. With the increase of the porosity, the position and range of the scattered zone and the spontaneous combustion zone in the goaf move back and expand. The width of the spontaneous combustion zone on the side of the main air inlet roadway and the side of the cutting roof and retaining roadway increases from 12 meters and 22 meters when the porosity is 0 to 19 meters and 60 meters when the porosity is 1.0. The range on both sides of the spontaneous combustion zone increases by 58.3% and 172.7% respectively, the spontaneous combustion zone with narrow strip distribution and expanding range appeared on the roadway side of the working face. The high concentration gas accumulation area moves to the deep part of the goaf and the accumulation area decreases continuously. The accumulation starting position moves from 100 meters lagged working face to 150 meters lagged working face. With the increase of porosity, the area of coupled disaster of coal spontaneous combustion and gas is constantly expanding. Compared with the three methods of blocking air-leakage by spraying polyurethane foam, using modified cement mortars, cement mortars and filling with gangue, the area of coal spontaneous combustion and gas coupling disaster in goaf is significantly reduced, which is more conducive to the management of coal spontaneous combustion and gas coupling disasters in goaf.https://www.mkaqzz.com/cn/article/doi/10.13347/j.cnki.mkaq.20250202blockin gair-leakage materialporositygoaf air leakagepolyurethane foamcutting roof and retaining roadwaygas migration |
| spellingShingle | Zhanyou SA Quheng YAO Yongliang YANG Lizhi TIAN Yujin QIN Shouqing LU Jie LIU Study on the influence of porosity of blocking air-leakage material on gas migration in goaf of cutting roof and retaining roadway Meikuang Anquan blockin gair-leakage material porosity goaf air leakage polyurethane foam cutting roof and retaining roadway gas migration |
| title | Study on the influence of porosity of blocking air-leakage material on gas migration in goaf of cutting roof and retaining roadway |
| title_full | Study on the influence of porosity of blocking air-leakage material on gas migration in goaf of cutting roof and retaining roadway |
| title_fullStr | Study on the influence of porosity of blocking air-leakage material on gas migration in goaf of cutting roof and retaining roadway |
| title_full_unstemmed | Study on the influence of porosity of blocking air-leakage material on gas migration in goaf of cutting roof and retaining roadway |
| title_short | Study on the influence of porosity of blocking air-leakage material on gas migration in goaf of cutting roof and retaining roadway |
| title_sort | study on the influence of porosity of blocking air leakage material on gas migration in goaf of cutting roof and retaining roadway |
| topic | blockin gair-leakage material porosity goaf air leakage polyurethane foam cutting roof and retaining roadway gas migration |
| url | https://www.mkaqzz.com/cn/article/doi/10.13347/j.cnki.mkaq.20250202 |
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