Failure mechanism of layer-crack rock models with different vertical fissure geometric configurations under uniaxial compression
Many case studies have revealed that rock bursts generally occur in high stress concentration areas where layer-crack structures often exist, especially for brittle coal or rock masses. Understanding the mechanical behavior of layer-crack rocks is beneficial for rational design and stability analysi...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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SAGE Publishing
2017-11-01
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| Series: | Advances in Mechanical Engineering |
| Online Access: | https://doi.org/10.1177/1687814017737259 |
| _version_ | 1828553197702086656 |
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| author | Tong-bin Zhao Wei-yao Guo Yun-liang Tan Feng-hai Yu Bin Huang Lian-sheng Zhang |
| author_facet | Tong-bin Zhao Wei-yao Guo Yun-liang Tan Feng-hai Yu Bin Huang Lian-sheng Zhang |
| author_sort | Tong-bin Zhao |
| collection | DOAJ |
| description | Many case studies have revealed that rock bursts generally occur in high stress concentration areas where layer-crack structures often exist, especially for brittle coal or rock masses. Understanding the mechanical behavior of layer-crack rocks is beneficial for rational design and stability analysis of rock engineering project and rock burst prevention. This study numerically investigated the influence of vertical fissure geometric configurations on the mechanical behavior of layer-crack rock models through uniaxial compression tests. Results reveal that the deformation and strength behaviors of layer-crack specimens depend on the vertical fissure geometric configurations, which also influence the crack evolution process. In aspect of failure mode, it is splitting failure or shear failure of the whole layer-crack specimen when the fissure length is smaller than 40 mm, but it is splitting failure or shear failure of supporting bodies in other conditions. Among the three factors, the influencing degree in order from strong to weak is fissure number, fissure length, and fissure width. Meanwhile, the influence of fissure geometric configurations on the failure mechanism of layer-crack structure and the occurrence mechanism of rock burst were revealed. In addition, some advices for keeping the stability of layer-crack structure and mitigating rock bursts were given. |
| first_indexed | 2024-12-12T05:14:25Z |
| format | Article |
| id | doaj.art-e435221e2c4a4b2c892e3ba8f50e13db |
| institution | Directory Open Access Journal |
| issn | 1687-8140 |
| language | English |
| last_indexed | 2024-12-12T05:14:25Z |
| publishDate | 2017-11-01 |
| publisher | SAGE Publishing |
| record_format | Article |
| series | Advances in Mechanical Engineering |
| spelling | doaj.art-e435221e2c4a4b2c892e3ba8f50e13db2022-12-22T00:36:49ZengSAGE PublishingAdvances in Mechanical Engineering1687-81402017-11-01910.1177/1687814017737259Failure mechanism of layer-crack rock models with different vertical fissure geometric configurations under uniaxial compressionTong-bin Zhao0Wei-yao Guo1Yun-liang Tan2Feng-hai Yu3Bin Huang4Lian-sheng Zhang5National Demonstration Center for Experimental Mining Engineering Education, Shandong University of Science and Technology, Qingdao, ChinaNational Demonstration Center for Experimental Mining Engineering Education, Shandong University of Science and Technology, Qingdao, ChinaNational Demonstration Center for Experimental Mining Engineering Education, Shandong University of Science and Technology, Qingdao, ChinaNational Demonstration Center for Experimental Mining Engineering Education, Shandong University of Science and Technology, Qingdao, ChinaNational Demonstration Center for Experimental Mining Engineering Education, Shandong University of Science and Technology, Qingdao, ChinaNational Demonstration Center for Experimental Mining Engineering Education, Shandong University of Science and Technology, Qingdao, ChinaMany case studies have revealed that rock bursts generally occur in high stress concentration areas where layer-crack structures often exist, especially for brittle coal or rock masses. Understanding the mechanical behavior of layer-crack rocks is beneficial for rational design and stability analysis of rock engineering project and rock burst prevention. This study numerically investigated the influence of vertical fissure geometric configurations on the mechanical behavior of layer-crack rock models through uniaxial compression tests. Results reveal that the deformation and strength behaviors of layer-crack specimens depend on the vertical fissure geometric configurations, which also influence the crack evolution process. In aspect of failure mode, it is splitting failure or shear failure of the whole layer-crack specimen when the fissure length is smaller than 40 mm, but it is splitting failure or shear failure of supporting bodies in other conditions. Among the three factors, the influencing degree in order from strong to weak is fissure number, fissure length, and fissure width. Meanwhile, the influence of fissure geometric configurations on the failure mechanism of layer-crack structure and the occurrence mechanism of rock burst were revealed. In addition, some advices for keeping the stability of layer-crack structure and mitigating rock bursts were given.https://doi.org/10.1177/1687814017737259 |
| spellingShingle | Tong-bin Zhao Wei-yao Guo Yun-liang Tan Feng-hai Yu Bin Huang Lian-sheng Zhang Failure mechanism of layer-crack rock models with different vertical fissure geometric configurations under uniaxial compression Advances in Mechanical Engineering |
| title | Failure mechanism of layer-crack rock models with different vertical fissure
geometric configurations under uniaxial compression |
| title_full | Failure mechanism of layer-crack rock models with different vertical fissure
geometric configurations under uniaxial compression |
| title_fullStr | Failure mechanism of layer-crack rock models with different vertical fissure
geometric configurations under uniaxial compression |
| title_full_unstemmed | Failure mechanism of layer-crack rock models with different vertical fissure
geometric configurations under uniaxial compression |
| title_short | Failure mechanism of layer-crack rock models with different vertical fissure
geometric configurations under uniaxial compression |
| title_sort | failure mechanism of layer crack rock models with different vertical fissure geometric configurations under uniaxial compression |
| url | https://doi.org/10.1177/1687814017737259 |
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