Evolution and mechanism of rockburst induced by structural plane based on GDEM
In the process of deep underground rock excavation, the surrounding rock of cave wall often causes some rockburst geological disasters due to the weakening of structural plane. In order to reveal the influence of the existence of structural plane on the rockburst induction mechanism, in this paper,...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | zho |
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Editorial Office of Journal of China Coal Society
2023-05-01
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| Series: | Meitan xuebao |
| Subjects: | |
| Online Access: | http://www.mtxb.com.cn/article/doi/10.13225/j.cnki.jccs.2023.0086 |
| _version_ | 1797799780500373504 |
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| author | Xiong ZHOU Fanzhen MENG Zhufeng YUE Wei WANG Rongchao XU Hui ZHOU Xiaoming GUAN |
| author_facet | Xiong ZHOU Fanzhen MENG Zhufeng YUE Wei WANG Rongchao XU Hui ZHOU Xiaoming GUAN |
| author_sort | Xiong ZHOU |
| collection | DOAJ |
| description | In the process of deep underground rock excavation, the surrounding rock of cave wall often causes some rockburst geological disasters due to the weakening of structural plane. In order to reveal the influence of the existence of structural plane on the rockburst induction mechanism, in this paper, adopting the finite element and discrete element coupled GDEM numerical simulation technology, the influences of the number and scale of vertical structural planes on the mechanical characteristics of rock cracking propagation, stress, displacement and slab velocity of deep hard rock straight arch tunnel under excavation and unloading are studied, and the evolutionary mechanism between wall cracking and structural plane rockburst is revealed. Results indicate that the failure modes and intensity for the surrounding rock with multiple structural planes are associated with the controlling effect of the structural plane, especially within 1.5 m away from the tunnel side, and the weak plane can act as the boundary of the rockburst cater. The uneven distribution of the tangential stress and the eccentric compression of the rock plates separated by the weak plane will induce intense slabbing rockburst. The size of the structural plane will also affect the intensity of the surrounding rock failure, and the stress transfer to the deep rockmass will be impeded. Three-jointed rock slab with large scale and high flexibility has high end load strength and obvious buckling effect of rock slab, which leads to radial internal rock slab buckling and triggering shear instability failure at the end of side wall surrounding rock slab and strong rock burst. However, with the small and medium scale three-jointed slab, the flexibility of the rock plate is small and the rock plate is stable, leading to the quasi-static brittle failure of the surrounding rock, and forming a small V-type destructive fracture port. |
| first_indexed | 2024-03-13T04:25:07Z |
| format | Article |
| id | doaj.art-ae70eb36ef5e4ffa80d5b1b93d404186 |
| institution | Directory Open Access Journal |
| issn | 0253-9993 |
| language | zho |
| last_indexed | 2024-03-13T04:25:07Z |
| publishDate | 2023-05-01 |
| publisher | Editorial Office of Journal of China Coal Society |
| record_format | Article |
| series | Meitan xuebao |
| spelling | doaj.art-ae70eb36ef5e4ffa80d5b1b93d4041862023-06-20T07:05:48ZzhoEditorial Office of Journal of China Coal SocietyMeitan xuebao0253-99932023-05-014852207222310.13225/j.cnki.jccs.2023.00862023-0086Evolution and mechanism of rockburst induced by structural plane based on GDEMXiong ZHOU0Fanzhen MENG1Zhufeng YUE2Wei WANG3Rongchao XU4Hui ZHOU5Xiaoming GUAN6College of Science, Qingdao University of Technology, Qingdao 266000, ChinaCollege of Science, Qingdao University of Technology, Qingdao 266000, ChinaCollege of Science, Qingdao University of Technology, Qingdao 266000, ChinaCollege of Science, Qingdao University of Technology, Qingdao 266000, ChinaCollege of Geosciences and Engineering, North China University of Water Resources and Electric Power, Zhengzhou 450000, ChinaState Key Laboratory of Geotechnical Mechanics and Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430000, ChinaCollege of Civil Engineering, Qingdao University of Technology, Qingdao 266000, ChinaIn the process of deep underground rock excavation, the surrounding rock of cave wall often causes some rockburst geological disasters due to the weakening of structural plane. In order to reveal the influence of the existence of structural plane on the rockburst induction mechanism, in this paper, adopting the finite element and discrete element coupled GDEM numerical simulation technology, the influences of the number and scale of vertical structural planes on the mechanical characteristics of rock cracking propagation, stress, displacement and slab velocity of deep hard rock straight arch tunnel under excavation and unloading are studied, and the evolutionary mechanism between wall cracking and structural plane rockburst is revealed. Results indicate that the failure modes and intensity for the surrounding rock with multiple structural planes are associated with the controlling effect of the structural plane, especially within 1.5 m away from the tunnel side, and the weak plane can act as the boundary of the rockburst cater. The uneven distribution of the tangential stress and the eccentric compression of the rock plates separated by the weak plane will induce intense slabbing rockburst. The size of the structural plane will also affect the intensity of the surrounding rock failure, and the stress transfer to the deep rockmass will be impeded. Three-jointed rock slab with large scale and high flexibility has high end load strength and obvious buckling effect of rock slab, which leads to radial internal rock slab buckling and triggering shear instability failure at the end of side wall surrounding rock slab and strong rock burst. However, with the small and medium scale three-jointed slab, the flexibility of the rock plate is small and the rock plate is stable, leading to the quasi-static brittle failure of the surrounding rock, and forming a small V-type destructive fracture port.http://www.mtxb.com.cn/article/doi/10.13225/j.cnki.jccs.2023.0086structural plane rockburstcrack propagationexcavation and unloadingcontinuous-discontinuouseccentric bearing loading |
| spellingShingle | Xiong ZHOU Fanzhen MENG Zhufeng YUE Wei WANG Rongchao XU Hui ZHOU Xiaoming GUAN Evolution and mechanism of rockburst induced by structural plane based on GDEM Meitan xuebao structural plane rockburst crack propagation excavation and unloading continuous-discontinuous eccentric bearing loading |
| title | Evolution and mechanism of rockburst induced by structural plane based on GDEM |
| title_full | Evolution and mechanism of rockburst induced by structural plane based on GDEM |
| title_fullStr | Evolution and mechanism of rockburst induced by structural plane based on GDEM |
| title_full_unstemmed | Evolution and mechanism of rockburst induced by structural plane based on GDEM |
| title_short | Evolution and mechanism of rockburst induced by structural plane based on GDEM |
| title_sort | evolution and mechanism of rockburst induced by structural plane based on gdem |
| topic | structural plane rockburst crack propagation excavation and unloading continuous-discontinuous eccentric bearing loading |
| url | http://www.mtxb.com.cn/article/doi/10.13225/j.cnki.jccs.2023.0086 |
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