Numerical Study on Soft Coal Pillar Stability in an Island Longwall Panel
Roadway support and management of longwall panels in an island soft coal panel are always difficult work. In a test mine, stress distribution, deformation characteristic, and plastic zone distribution around the roadway and coal pillars in the development and mining periods were investigated with re...
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| Format: | Article |
| Language: | English |
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Wiley
2021-01-01
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| Series: | Advances in Civil Engineering |
| Online Access: | http://dx.doi.org/10.1155/2021/8831778 |
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| author | Qingyun Xu Jian-Biao Bai Shuai Yan Rui Wang Shaoxu Wu |
| author_facet | Qingyun Xu Jian-Biao Bai Shuai Yan Rui Wang Shaoxu Wu |
| author_sort | Qingyun Xu |
| collection | DOAJ |
| description | Roadway support and management of longwall panels in an island soft coal panel are always difficult work. In a test mine, stress distribution, deformation characteristic, and plastic zone distribution around the roadway and coal pillars in the development and mining periods were investigated with respect to the widths of different coal pillars using theoretical and simulation methods. The most reasonable width of coal pillars was comprehensively determined, and the field test was conducted successfully. The results show that a reasonable width of coal pillars is 7.0–8.2 m using the analytical method. The distribution of vertical stress in the coal pillars showed an asymmetric “double-hump” shape, in which the range of abutment pressure was about 26.0–43.0 m, and the roadway should be laid away from stress concentration. When the coal pillar width is 5.0–7.0 m, deformation of the roadway is half that with 8.0–10.0 m coal pillar in the development and mining period. The plastic zone in the surrounding rock firstly decreases and increases with increasing coal pillar width; the smallest range occurs with a coal pillar width of 5.0 m. Finally, a reasonable width for coal pillars in an island panel was determined to be 5.0 m. Industrial practice indicated that a coal pillar width of 5.0 m efficiently controlled deformation of the surrounding rock, which was an important basis for choosing the width of coal pillars around gob-side entries in island longwall panels with similar geological conditions. |
| format | Article |
| id | doaj-art-1125202e7035439685dc2f541ea607da |
| institution | Kabale University |
| issn | 1687-8086 1687-8094 |
| language | English |
| publishDate | 2021-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Civil Engineering |
| spelling | doaj-art-1125202e7035439685dc2f541ea607da2025-02-03T01:28:32ZengWileyAdvances in Civil Engineering1687-80861687-80942021-01-01202110.1155/2021/88317788831778Numerical Study on Soft Coal Pillar Stability in an Island Longwall PanelQingyun Xu0Jian-Biao Bai1Shuai Yan2Rui Wang3Shaoxu Wu4State Key Laboratory of Coal Resources and Safe Mining, School of Mines, China University of Mining and Technology, Xuzhou, Jiangsu 221116, ChinaState Key Laboratory of Coal Resources and Safe Mining, School of Mines, China University of Mining and Technology, Xuzhou, Jiangsu 221116, ChinaState Key Laboratory of Coal Resources and Safe Mining, School of Mines, China University of Mining and Technology, Xuzhou, Jiangsu 221116, ChinaState Key Laboratory of Coal Resources and Safe Mining, School of Mines, China University of Mining and Technology, Xuzhou, Jiangsu 221116, ChinaBeijing Research Institute of Uranium Geology, Beijing 100029, ChinaRoadway support and management of longwall panels in an island soft coal panel are always difficult work. In a test mine, stress distribution, deformation characteristic, and plastic zone distribution around the roadway and coal pillars in the development and mining periods were investigated with respect to the widths of different coal pillars using theoretical and simulation methods. The most reasonable width of coal pillars was comprehensively determined, and the field test was conducted successfully. The results show that a reasonable width of coal pillars is 7.0–8.2 m using the analytical method. The distribution of vertical stress in the coal pillars showed an asymmetric “double-hump” shape, in which the range of abutment pressure was about 26.0–43.0 m, and the roadway should be laid away from stress concentration. When the coal pillar width is 5.0–7.0 m, deformation of the roadway is half that with 8.0–10.0 m coal pillar in the development and mining period. The plastic zone in the surrounding rock firstly decreases and increases with increasing coal pillar width; the smallest range occurs with a coal pillar width of 5.0 m. Finally, a reasonable width for coal pillars in an island panel was determined to be 5.0 m. Industrial practice indicated that a coal pillar width of 5.0 m efficiently controlled deformation of the surrounding rock, which was an important basis for choosing the width of coal pillars around gob-side entries in island longwall panels with similar geological conditions.http://dx.doi.org/10.1155/2021/8831778 |
| spellingShingle | Qingyun Xu Jian-Biao Bai Shuai Yan Rui Wang Shaoxu Wu Numerical Study on Soft Coal Pillar Stability in an Island Longwall Panel Advances in Civil Engineering |
| title | Numerical Study on Soft Coal Pillar Stability in an Island Longwall Panel |
| title_full | Numerical Study on Soft Coal Pillar Stability in an Island Longwall Panel |
| title_fullStr | Numerical Study on Soft Coal Pillar Stability in an Island Longwall Panel |
| title_full_unstemmed | Numerical Study on Soft Coal Pillar Stability in an Island Longwall Panel |
| title_short | Numerical Study on Soft Coal Pillar Stability in an Island Longwall Panel |
| title_sort | numerical study on soft coal pillar stability in an island longwall panel |
| url | http://dx.doi.org/10.1155/2021/8831778 |
| work_keys_str_mv | AT qingyunxu numericalstudyonsoftcoalpillarstabilityinanislandlongwallpanel AT jianbiaobai numericalstudyonsoftcoalpillarstabilityinanislandlongwallpanel AT shuaiyan numericalstudyonsoftcoalpillarstabilityinanislandlongwallpanel AT ruiwang numericalstudyonsoftcoalpillarstabilityinanislandlongwallpanel AT shaoxuwu numericalstudyonsoftcoalpillarstabilityinanislandlongwallpanel |