Numerical Study of Damage to Rock Surrounding an Underground Coal Roadway Excavation
In coal mines, underground roadways are required to transport coal and personnel. Such tunnels can become unstable and hazardous. This study simulates deformation and damage in the rock surrounding a shallow coal seam roadway using particle flow code. A numerical model of particle flow in the surrou...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2020-01-01
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| Series: | Advances in Civil Engineering |
| Online Access: | http://dx.doi.org/10.1155/2020/8863289 |
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| author | Jiangbo Wei Shuangming Wang Zhou Zhao Delu Li Lipeng Guo |
| author_facet | Jiangbo Wei Shuangming Wang Zhou Zhao Delu Li Lipeng Guo |
| author_sort | Jiangbo Wei |
| collection | DOAJ |
| description | In coal mines, underground roadways are required to transport coal and personnel. Such tunnels can become unstable and hazardous. This study simulates deformation and damage in the rock surrounding a shallow coal seam roadway using particle flow code. A numerical model of particle flow in the surrounding rock was constructed based on field survey and drilling data. Microcharacteristic indices, including stress, displacement, and microcrack fields, were used to study deformation and damage characteristics and mechanisms in the surrounding rocks. The results show that the stress within the rock changed gradually from a vertical stress to a circumferential stress pattern. Stress release led to self-stabilizing diamond-shaped and X-shaped tensile stress distribution patterns after the excavation of the roadway. Cracking increased and eventually formed cut-through cracks as the concentrated stress transferred to greater depths at the sides, forming shear and triangular-shaped failure regions. Overall, the roof and floor were relatively stable, whereas the sidewalls gradually failed. These results provide a reference for the control of rock surrounding roadways in coal mines. |
| format | Article |
| id | doaj-art-ef5e3878911144a580c20aa4f48debf1 |
| institution | Kabale University |
| issn | 1687-8086 1687-8094 |
| language | English |
| publishDate | 2020-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Civil Engineering |
| spelling | doaj-art-ef5e3878911144a580c20aa4f48debf12025-02-03T01:24:58ZengWileyAdvances in Civil Engineering1687-80861687-80942020-01-01202010.1155/2020/88632898863289Numerical Study of Damage to Rock Surrounding an Underground Coal Roadway ExcavationJiangbo Wei0Shuangming Wang1Zhou Zhao2Delu Li3Lipeng Guo4College of Geology and Environment, Xi’an University of Science and Technology, Xi’an, Shaanxi 710054, ChinaCollege of Geology and Environment, Xi’an University of Science and Technology, Xi’an, Shaanxi 710054, ChinaCollege of Geology and Environment, Xi’an University of Science and Technology, Xi’an, Shaanxi 710054, ChinaCollege of Geology and Environment, Xi’an University of Science and Technology, Xi’an, Shaanxi 710054, ChinaCollege of Geology and Environment, Xi’an University of Science and Technology, Xi’an, Shaanxi 710054, ChinaIn coal mines, underground roadways are required to transport coal and personnel. Such tunnels can become unstable and hazardous. This study simulates deformation and damage in the rock surrounding a shallow coal seam roadway using particle flow code. A numerical model of particle flow in the surrounding rock was constructed based on field survey and drilling data. Microcharacteristic indices, including stress, displacement, and microcrack fields, were used to study deformation and damage characteristics and mechanisms in the surrounding rocks. The results show that the stress within the rock changed gradually from a vertical stress to a circumferential stress pattern. Stress release led to self-stabilizing diamond-shaped and X-shaped tensile stress distribution patterns after the excavation of the roadway. Cracking increased and eventually formed cut-through cracks as the concentrated stress transferred to greater depths at the sides, forming shear and triangular-shaped failure regions. Overall, the roof and floor were relatively stable, whereas the sidewalls gradually failed. These results provide a reference for the control of rock surrounding roadways in coal mines.http://dx.doi.org/10.1155/2020/8863289 |
| spellingShingle | Jiangbo Wei Shuangming Wang Zhou Zhao Delu Li Lipeng Guo Numerical Study of Damage to Rock Surrounding an Underground Coal Roadway Excavation Advances in Civil Engineering |
| title | Numerical Study of Damage to Rock Surrounding an Underground Coal Roadway Excavation |
| title_full | Numerical Study of Damage to Rock Surrounding an Underground Coal Roadway Excavation |
| title_fullStr | Numerical Study of Damage to Rock Surrounding an Underground Coal Roadway Excavation |
| title_full_unstemmed | Numerical Study of Damage to Rock Surrounding an Underground Coal Roadway Excavation |
| title_short | Numerical Study of Damage to Rock Surrounding an Underground Coal Roadway Excavation |
| title_sort | numerical study of damage to rock surrounding an underground coal roadway excavation |
| url | http://dx.doi.org/10.1155/2020/8863289 |
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