Analysis for Overburden Destruction on Lateral Boundary of Stope Based on Viscoelastic-Plastic Finite Element Method
In longwall mining, the deformation and destruction of overlying strata always lag behind coal extraction. The overlying strata characteristics at the lateral boundary of the stope can be classified into four categories, i.e., Hard-Soft, Soft-Hard, Hard-Hard, and Soft-Soft. In order to analyze the e...
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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/10.1155/2021/8882481 |
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| author | Zengde Yin Jinxiao Liu Yongle Liu Wenxin Li |
| author_facet | Zengde Yin Jinxiao Liu Yongle Liu Wenxin Li |
| author_sort | Zengde Yin |
| collection | DOAJ |
| description | In longwall mining, the deformation and destruction of overlying strata always lag behind coal extraction. The overlying strata characteristics at the lateral boundary of the stope can be classified into four categories, i.e., Hard-Soft, Soft-Hard, Hard-Hard, and Soft-Soft. In order to analyze the effect of the above four structures, we adopt viscoelastic theory to the finite element method (FEM) and define the point safety factor to evaluate the rock damage. The accuracy of programming is verified through example verification. A modified viscoelastic-plastic FEM model is applied to analyze the performance of four overburden structures. The numerical computation results show the following: From the rupture of overburden rock to its stabilization, the duration time of four typical structures can be sorted as “Soft-Soft < Hard-Soft < Soft-Hard < Hard-Hard”. The fracture direction and dip angle of each structure vary as well. The fracture zone of the H-S structure is inclined toward the goaf, while that of the S-H structure is inclined to the lateral boundary of the stope. The fracture zone of the H-H structure is also inclined toward the lateral boundary, with a greater angle than the S-H structure, while the fracture zone of the S-S structure is inclined to goaf, with a greater angle than the H-S structure. |
| format | Article |
| id | doaj-art-6aa4c58c50564a9381b308a190a4cc9f |
| 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-6aa4c58c50564a9381b308a190a4cc9f2025-02-03T01:05:25ZengWileyAdvances in Civil Engineering1687-80861687-80942021-01-01202110.1155/2021/88824818882481Analysis for Overburden Destruction on Lateral Boundary of Stope Based on Viscoelastic-Plastic Finite Element MethodZengde Yin0Jinxiao Liu1Yongle Liu2Wenxin Li3College of Safety and Environment Engineering, Shandong University of Science and Technology, 579 Qianwangang Rd, Huangdao District, Qingdao 266590, ChinaMine Disaster Prevention and Control-Ministry of State Key Laboratory Breeding Base, Shandong University of Science and Technology, 579 Qianwangang Rd, Huangdao District, Qingdao 266590, ChinaCollege of Energy and Mining Engineering, Shandong University of Science and Technology, 579 Qianwangang Rd, Huangdao District, Qingdao 266590, ChinaMine Disaster Prevention and Control-Ministry of State Key Laboratory Breeding Base, Shandong University of Science and Technology, 579 Qianwangang Rd, Huangdao District, Qingdao 266590, ChinaIn longwall mining, the deformation and destruction of overlying strata always lag behind coal extraction. The overlying strata characteristics at the lateral boundary of the stope can be classified into four categories, i.e., Hard-Soft, Soft-Hard, Hard-Hard, and Soft-Soft. In order to analyze the effect of the above four structures, we adopt viscoelastic theory to the finite element method (FEM) and define the point safety factor to evaluate the rock damage. The accuracy of programming is verified through example verification. A modified viscoelastic-plastic FEM model is applied to analyze the performance of four overburden structures. The numerical computation results show the following: From the rupture of overburden rock to its stabilization, the duration time of four typical structures can be sorted as “Soft-Soft < Hard-Soft < Soft-Hard < Hard-Hard”. The fracture direction and dip angle of each structure vary as well. The fracture zone of the H-S structure is inclined toward the goaf, while that of the S-H structure is inclined to the lateral boundary of the stope. The fracture zone of the H-H structure is also inclined toward the lateral boundary, with a greater angle than the S-H structure, while the fracture zone of the S-S structure is inclined to goaf, with a greater angle than the H-S structure.http://dx.doi.org/10.1155/2021/8882481 |
| spellingShingle | Zengde Yin Jinxiao Liu Yongle Liu Wenxin Li Analysis for Overburden Destruction on Lateral Boundary of Stope Based on Viscoelastic-Plastic Finite Element Method Advances in Civil Engineering |
| title | Analysis for Overburden Destruction on Lateral Boundary of Stope Based on Viscoelastic-Plastic Finite Element Method |
| title_full | Analysis for Overburden Destruction on Lateral Boundary of Stope Based on Viscoelastic-Plastic Finite Element Method |
| title_fullStr | Analysis for Overburden Destruction on Lateral Boundary of Stope Based on Viscoelastic-Plastic Finite Element Method |
| title_full_unstemmed | Analysis for Overburden Destruction on Lateral Boundary of Stope Based on Viscoelastic-Plastic Finite Element Method |
| title_short | Analysis for Overburden Destruction on Lateral Boundary of Stope Based on Viscoelastic-Plastic Finite Element Method |
| title_sort | analysis for overburden destruction on lateral boundary of stope based on viscoelastic plastic finite element method |
| url | http://dx.doi.org/10.1155/2021/8882481 |
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