Failure behaviors of anisotropic shale with a circular cavity subjected to uniaxial compression
Layered rock formations are frequently encountered during the excavation of underground structures. The stability of such structures is influenced not only by the stress concentration caused by the cavities in the strata but also by the anisotropy of the layered rock mass. The interaction between th...
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| Format: | Article |
| Language: | English |
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Elsevier
2025-01-01
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| Series: | Journal of Rock Mechanics and Geotechnical Engineering |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S1674775524003949 |
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| author | Xianhui Feng Huilin Liu Peitao Wang Shichao Zhang Quanqi Zhu Chun'an Tang Yaxing Leng |
| author_facet | Xianhui Feng Huilin Liu Peitao Wang Shichao Zhang Quanqi Zhu Chun'an Tang Yaxing Leng |
| author_sort | Xianhui Feng |
| collection | DOAJ |
| description | Layered rock formations are frequently encountered during the excavation of underground structures. The stability of such structures is influenced not only by the stress concentration caused by the cavities in the strata but also by the anisotropy of the layered rock mass. The interaction between them can lead to critical structural failure, such as rupture, collapse, or significant deformation within the adjacent rock mass, thereby jeopardizing operational safety. However, the coupling law and mechanism between the stress concentration resulting from the cavities and the anisotropy of a layered rock mass remain unclear. In this study, a uniaxial compression test was performed on shale specimens containing a circular hole to investigate the effects of layer inclination and circular holes on the mechanical properties, elastic energy storage, and failure behaviors of these specimens. The failure mechanism of the rock surrounding the hole was analyzed on the basis of the single plane of weakness theory and the Kirsch solution. The test results indicated pronounced anisotropy in the compressive strength, elastic modulus, and elastic strain energy of the specimens, with distinct “V”, “M” and “U”-shaped patterns correlated with varying layer inclination angles. In addition, the combined effect of stress concentration and layer inclination resulted in different failure types, which were classified into four groups according to their failure behavior. Theoretical analysis revealed that failure around circular holes in layered rock is affected by a range of variables, such as layer inclination, layer strength, lateral pressure coefficient, azimuth, and loading stress. |
| format | Article |
| id | doaj-art-f97406b43196430183b09002b34497d8 |
| institution | Kabale University |
| issn | 1674-7755 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Rock Mechanics and Geotechnical Engineering |
| spelling | doaj-art-f97406b43196430183b09002b34497d82025-01-17T04:49:12ZengElsevierJournal of Rock Mechanics and Geotechnical Engineering1674-77552025-01-01171357369Failure behaviors of anisotropic shale with a circular cavity subjected to uniaxial compressionXianhui Feng0Huilin Liu1Peitao Wang2Shichao Zhang3Quanqi Zhu4Chun'an Tang5Yaxing Leng6School of Civil and Resources Engineering, University of Science and Technology Beijing, Beijing, 100083, ChinaSchool of Resources and Safety Engineering, Central South University, Changsha, 410083, China; Corresponding author.School of Civil and Resources Engineering, University of Science and Technology Beijing, Beijing, 100083, ChinaSchool of Public Safety and Emergency Management, Anhui University of Science and Technology, Huainan, 232000, ChinaSchool of Resources and Safety Engineering, Central South University, Changsha, 410083, ChinaState Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian, 116024, ChinaInstitute of Geology, Chinese Academy of Geological Sciences, Beijing, 100037, ChinaLayered rock formations are frequently encountered during the excavation of underground structures. The stability of such structures is influenced not only by the stress concentration caused by the cavities in the strata but also by the anisotropy of the layered rock mass. The interaction between them can lead to critical structural failure, such as rupture, collapse, or significant deformation within the adjacent rock mass, thereby jeopardizing operational safety. However, the coupling law and mechanism between the stress concentration resulting from the cavities and the anisotropy of a layered rock mass remain unclear. In this study, a uniaxial compression test was performed on shale specimens containing a circular hole to investigate the effects of layer inclination and circular holes on the mechanical properties, elastic energy storage, and failure behaviors of these specimens. The failure mechanism of the rock surrounding the hole was analyzed on the basis of the single plane of weakness theory and the Kirsch solution. The test results indicated pronounced anisotropy in the compressive strength, elastic modulus, and elastic strain energy of the specimens, with distinct “V”, “M” and “U”-shaped patterns correlated with varying layer inclination angles. In addition, the combined effect of stress concentration and layer inclination resulted in different failure types, which were classified into four groups according to their failure behavior. Theoretical analysis revealed that failure around circular holes in layered rock is affected by a range of variables, such as layer inclination, layer strength, lateral pressure coefficient, azimuth, and loading stress.http://www.sciencedirect.com/science/article/pii/S1674775524003949AnisotropyShaleCircular holeMechanical propertiesFailure behaviors |
| spellingShingle | Xianhui Feng Huilin Liu Peitao Wang Shichao Zhang Quanqi Zhu Chun'an Tang Yaxing Leng Failure behaviors of anisotropic shale with a circular cavity subjected to uniaxial compression Journal of Rock Mechanics and Geotechnical Engineering Anisotropy Shale Circular hole Mechanical properties Failure behaviors |
| title | Failure behaviors of anisotropic shale with a circular cavity subjected to uniaxial compression |
| title_full | Failure behaviors of anisotropic shale with a circular cavity subjected to uniaxial compression |
| title_fullStr | Failure behaviors of anisotropic shale with a circular cavity subjected to uniaxial compression |
| title_full_unstemmed | Failure behaviors of anisotropic shale with a circular cavity subjected to uniaxial compression |
| title_short | Failure behaviors of anisotropic shale with a circular cavity subjected to uniaxial compression |
| title_sort | failure behaviors of anisotropic shale with a circular cavity subjected to uniaxial compression |
| topic | Anisotropy Shale Circular hole Mechanical properties Failure behaviors |
| url | http://www.sciencedirect.com/science/article/pii/S1674775524003949 |
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