Mechanism of the coal bursts in the working face during mining of steeply inclined and extra thick coal seam
AbstractCoal bursts caused by mining-induced seismicity occur in the working face in steeply inclined and extra thick coal seams (SIETCSs). This article presents a case study in SIETCS through discrete element simulation as well as field investigation. The evolution of the coal burst was studied fro...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Taylor & Francis Group
2023-12-01
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| Series: | Geomatics, Natural Hazards & Risk |
| Subjects: | |
| Online Access: | https://www.tandfonline.com/doi/10.1080/19475705.2023.2206511 |
| _version_ | 1797389190041698304 |
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| author | Jinrong Cao Linming Dou Jiang He Jiahao Xie Zepeng Han Songwei Wang |
| author_facet | Jinrong Cao Linming Dou Jiang He Jiahao Xie Zepeng Han Songwei Wang |
| author_sort | Jinrong Cao |
| collection | DOAJ |
| description | AbstractCoal bursts caused by mining-induced seismicity occur in the working face in steeply inclined and extra thick coal seams (SIETCSs). This article presents a case study in SIETCS through discrete element simulation as well as field investigation. The evolution of the coal burst was studied from the perspective of stress distribution, crack propagation and coal fragment ejection. The results showed that dynamic failure mainly occurred in the coal near the roof. The deep bottom coal and the top coal near the roof are under high static stress due to the clamping effect of the roof and floor and the rotation of the deep roof. The coal burst in the working face was triggered by mining-induced seismicity. The coal burst occurred when the sum of the static stress and the dynamic stress caused by the mining-induced seismicity exceeds the sum of the ultimate strength of the coal and the support strength, which was called the ‘clamping-rotation-dynamic loads’ mechanism. During the coal burst, the cracks developed rapidly into the deep bottom coal and the top coal on the roof side. The results can serve as an important reference for the coal burst failure mechanism in the working face in SIETCSs. |
| first_indexed | 2024-03-08T22:52:15Z |
| format | Article |
| id | doaj.art-215274b8b1d54c998ca10bca20f42abf |
| institution | Directory Open Access Journal |
| issn | 1947-5705 1947-5713 |
| language | English |
| last_indexed | 2024-03-08T22:52:15Z |
| publishDate | 2023-12-01 |
| publisher | Taylor & Francis Group |
| record_format | Article |
| series | Geomatics, Natural Hazards & Risk |
| spelling | doaj.art-215274b8b1d54c998ca10bca20f42abf2023-12-16T08:49:47ZengTaylor & Francis GroupGeomatics, Natural Hazards & Risk1947-57051947-57132023-12-0114110.1080/19475705.2023.2206511Mechanism of the coal bursts in the working face during mining of steeply inclined and extra thick coal seamJinrong Cao0Linming Dou1Jiang He2Jiahao Xie3Zepeng Han4Songwei Wang5School of Mines, China University of Mining and Technology, Xuzhou, Jiangsu, ChinaSchool of Mines, China University of Mining and Technology, Xuzhou, Jiangsu, ChinaSchool of Mines, China University of Mining and Technology, Xuzhou, Jiangsu, ChinaSchool of Energy Engineering, Xi’an University of Science and Technology, Xi’an, Shaanxi, ChinaSchool of Mines, China University of Mining and Technology, Xuzhou, Jiangsu, ChinaSchool of Mines, China University of Mining and Technology, Xuzhou, Jiangsu, ChinaAbstractCoal bursts caused by mining-induced seismicity occur in the working face in steeply inclined and extra thick coal seams (SIETCSs). This article presents a case study in SIETCS through discrete element simulation as well as field investigation. The evolution of the coal burst was studied from the perspective of stress distribution, crack propagation and coal fragment ejection. The results showed that dynamic failure mainly occurred in the coal near the roof. The deep bottom coal and the top coal near the roof are under high static stress due to the clamping effect of the roof and floor and the rotation of the deep roof. The coal burst in the working face was triggered by mining-induced seismicity. The coal burst occurred when the sum of the static stress and the dynamic stress caused by the mining-induced seismicity exceeds the sum of the ultimate strength of the coal and the support strength, which was called the ‘clamping-rotation-dynamic loads’ mechanism. During the coal burst, the cracks developed rapidly into the deep bottom coal and the top coal on the roof side. The results can serve as an important reference for the coal burst failure mechanism in the working face in SIETCSs.https://www.tandfonline.com/doi/10.1080/19475705.2023.2206511Coal burststeeply inclined and extra thick coal seamUDECstress distributioncrack development |
| spellingShingle | Jinrong Cao Linming Dou Jiang He Jiahao Xie Zepeng Han Songwei Wang Mechanism of the coal bursts in the working face during mining of steeply inclined and extra thick coal seam Geomatics, Natural Hazards & Risk Coal burst steeply inclined and extra thick coal seam UDEC stress distribution crack development |
| title | Mechanism of the coal bursts in the working face during mining of steeply inclined and extra thick coal seam |
| title_full | Mechanism of the coal bursts in the working face during mining of steeply inclined and extra thick coal seam |
| title_fullStr | Mechanism of the coal bursts in the working face during mining of steeply inclined and extra thick coal seam |
| title_full_unstemmed | Mechanism of the coal bursts in the working face during mining of steeply inclined and extra thick coal seam |
| title_short | Mechanism of the coal bursts in the working face during mining of steeply inclined and extra thick coal seam |
| title_sort | mechanism of the coal bursts in the working face during mining of steeply inclined and extra thick coal seam |
| topic | Coal burst steeply inclined and extra thick coal seam UDEC stress distribution crack development |
| url | https://www.tandfonline.com/doi/10.1080/19475705.2023.2206511 |
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