Design of Longwall Coal Pillar for the Prevention of Water Inrush from the Seam Floor with Through Fault
Setting up a waterproof coal pillar is an important measure to prevent water inrush from the Weibei mining through fault floor. Based on the plastic slip line field theory, a mechanical model of floor water inrush induced by confined water in the through fault zone was established. The mechanical ex...
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| Main Authors: | , , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Wiley
2021-01-01
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| Series: | Geofluids |
| Online Access: | http://dx.doi.org/10.1155/2021/5536235 |
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| _version_ | 1850170495946719232 |
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| author | Ang Li Bing nan Ji Qiang Ma Chaoyang Liu Feng Wang Li Ma Pengfei Mu Lin Mou Yuxuan Yang Xuesong Ding |
| author_facet | Ang Li Bing nan Ji Qiang Ma Chaoyang Liu Feng Wang Li Ma Pengfei Mu Lin Mou Yuxuan Yang Xuesong Ding |
| author_sort | Ang Li |
| collection | DOAJ |
| description | Setting up a waterproof coal pillar is an important measure to prevent water inrush from the Weibei mining through fault floor. Based on the plastic slip line field theory, a mechanical model of floor water inrush induced by confined water in the through fault zone was established. The mechanical expressions of confined water pressure and the width of the waterproof coal pillar under the state of limit equilibrium were derived. Combining the laws of floor deformation, failure and fault activation under two kinds of coal pillar width, the safety width of the waterproof coal pillar was determined. Furthermore, the safety threshold is better than the empirical value mentioned in the “coal mine safety regulations.” Following this, grouting transformation was carried out on the K2 sand layer of the cut roadway floor. This provided a theoretical basis and engineering practice for water disaster prevention and the control of the structural floor under similar conditions in the Weibei mining area for future benefit. |
| format | Article |
| id | doaj-art-9ded214edee841d8b4ca95ca0e8219f7 |
| institution | OA Journals |
| issn | 1468-8115 1468-8123 |
| language | English |
| publishDate | 2021-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geofluids |
| spelling | doaj-art-9ded214edee841d8b4ca95ca0e8219f72025-08-20T02:20:29ZengWileyGeofluids1468-81151468-81232021-01-01202110.1155/2021/55362355536235Design of Longwall Coal Pillar for the Prevention of Water Inrush from the Seam Floor with Through FaultAng Li0Bing nan Ji1Qiang Ma2Chaoyang Liu3Feng Wang4Li Ma5Pengfei Mu6Lin Mou7Yuxuan Yang8Xuesong Ding9School of Architecture and Civil Engineering, Xi’an University of Science and Technology, Xi’an, Shaanxi 710054, ChinaSchool of Architecture and Civil Engineering, Xi’an University of Science and Technology, Xi’an, Shaanxi 710054, ChinaXi’an Research Institute of China Coal Technology & Engineering Group Corp, Xi’an, Shaanxi 710077, ChinaShaanxi Coal Chemical Industry Group Chenghe Mines Co., Ltd., Weinan Shaanxi 715200, ChinaShaanxi Coal Chemical Industry Group Chenghe Mines Co., Ltd., Weinan Shaanxi 715200, ChinaKey Laboratory of Coal Resources Exploration and Comprehensive Utilization, Ministry of Land and Resources, Xi’an, Shaanxi 710021, ChinaXi’an Research Institute of China Coal Technology & Engineering Group Corp, Xi’an, Shaanxi 710077, ChinaXi’an Research Institute of China Coal Technology & Engineering Group Corp, Xi’an, Shaanxi 710077, ChinaSchool of Architecture and Civil Engineering, Xi’an University of Science and Technology, Xi’an, Shaanxi 710054, ChinaSchool of Architecture and Civil Engineering, Xi’an University of Science and Technology, Xi’an, Shaanxi 710054, ChinaSetting up a waterproof coal pillar is an important measure to prevent water inrush from the Weibei mining through fault floor. Based on the plastic slip line field theory, a mechanical model of floor water inrush induced by confined water in the through fault zone was established. The mechanical expressions of confined water pressure and the width of the waterproof coal pillar under the state of limit equilibrium were derived. Combining the laws of floor deformation, failure and fault activation under two kinds of coal pillar width, the safety width of the waterproof coal pillar was determined. Furthermore, the safety threshold is better than the empirical value mentioned in the “coal mine safety regulations.” Following this, grouting transformation was carried out on the K2 sand layer of the cut roadway floor. This provided a theoretical basis and engineering practice for water disaster prevention and the control of the structural floor under similar conditions in the Weibei mining area for future benefit.http://dx.doi.org/10.1155/2021/5536235 |
| spellingShingle | Ang Li Bing nan Ji Qiang Ma Chaoyang Liu Feng Wang Li Ma Pengfei Mu Lin Mou Yuxuan Yang Xuesong Ding Design of Longwall Coal Pillar for the Prevention of Water Inrush from the Seam Floor with Through Fault Geofluids |
| title | Design of Longwall Coal Pillar for the Prevention of Water Inrush from the Seam Floor with Through Fault |
| title_full | Design of Longwall Coal Pillar for the Prevention of Water Inrush from the Seam Floor with Through Fault |
| title_fullStr | Design of Longwall Coal Pillar for the Prevention of Water Inrush from the Seam Floor with Through Fault |
| title_full_unstemmed | Design of Longwall Coal Pillar for the Prevention of Water Inrush from the Seam Floor with Through Fault |
| title_short | Design of Longwall Coal Pillar for the Prevention of Water Inrush from the Seam Floor with Through Fault |
| title_sort | design of longwall coal pillar for the prevention of water inrush from the seam floor with through fault |
| url | http://dx.doi.org/10.1155/2021/5536235 |
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