Sliding modes of fault activation under constant normal stiffness conditions
Fault activation has been the focus of research community for years. However, the studies of fault activation remain immature, such as the fault activation mode and its major factors under constant normal stiffness (CNS) conditions associated with large thickness of fault surrounding rock mass. In t...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2023-05-01
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| Series: | Journal of Rock Mechanics and Geotechnical Engineering |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S1674775522001810 |
| _version_ | 1797837087409438720 |
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| author | Chuanqing Zhang Jie Xu Shengji Jin Guojian Cui Yuhang Guo Lingyu Li |
| author_facet | Chuanqing Zhang Jie Xu Shengji Jin Guojian Cui Yuhang Guo Lingyu Li |
| author_sort | Chuanqing Zhang |
| collection | DOAJ |
| description | Fault activation has been the focus of research community for years. However, the studies of fault activation remain immature, such as the fault activation mode and its major factors under constant normal stiffness (CNS) conditions associated with large thickness of fault surrounding rock mass. In this study, the rock friction experiments were conducted to understand the fault activation modes under the CNS conditions. Two major parameters, i.e. the initial normal stress and loading rate, were considered and calibrated in the tests. To reveal the response mechanism of fault activation, the local strains near the fault plane were recorded, and the macroscopic stresses and displacements were analyzed. The testing results show that the effect of displacement-controlled loading rate is more pronounced under the CNS conditions than that under constant normal load (CNL) conditions. Both the normal and shear stresses drop suddenly when the stick-slip occurs. The decrease and increase of the normal stress are synchronous with the shear stress in the regular stick-slip scenario, but mismatch with the shear stress during the chaotic stick-slip process. The results are helpful for understanding the fault sliding mode and the prediction and prevention of fault slip. |
| first_indexed | 2024-04-09T15:20:16Z |
| format | Article |
| id | doaj.art-4d62129ffa2244e0895c54a02c5b953e |
| institution | Directory Open Access Journal |
| issn | 1674-7755 |
| language | English |
| last_indexed | 2024-04-09T15:20:16Z |
| publishDate | 2023-05-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Rock Mechanics and Geotechnical Engineering |
| spelling | doaj.art-4d62129ffa2244e0895c54a02c5b953e2023-04-29T14:47:58ZengElsevierJournal of Rock Mechanics and Geotechnical Engineering1674-77552023-05-0115512131225Sliding modes of fault activation under constant normal stiffness conditionsChuanqing Zhang0Jie Xu1Shengji Jin2Guojian Cui3Yuhang Guo4Lingyu Li5State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, 430071, China; University of Chinese Academy of Sciences, Beijing, 100049, China; Corresponding author. State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, 430071, China.Shenyang University of Technology, Shenyang, 110870, ChinaShenyang University of Technology, Shenyang, 110870, ChinaState Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, 430071, China; University of Chinese Academy of Sciences, Beijing, 100049, ChinaState Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, 430071, China; University of Chinese Academy of Sciences, Beijing, 100049, ChinaState Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, 430071, China; University of Chinese Academy of Sciences, Beijing, 100049, ChinaFault activation has been the focus of research community for years. However, the studies of fault activation remain immature, such as the fault activation mode and its major factors under constant normal stiffness (CNS) conditions associated with large thickness of fault surrounding rock mass. In this study, the rock friction experiments were conducted to understand the fault activation modes under the CNS conditions. Two major parameters, i.e. the initial normal stress and loading rate, were considered and calibrated in the tests. To reveal the response mechanism of fault activation, the local strains near the fault plane were recorded, and the macroscopic stresses and displacements were analyzed. The testing results show that the effect of displacement-controlled loading rate is more pronounced under the CNS conditions than that under constant normal load (CNL) conditions. Both the normal and shear stresses drop suddenly when the stick-slip occurs. The decrease and increase of the normal stress are synchronous with the shear stress in the regular stick-slip scenario, but mismatch with the shear stress during the chaotic stick-slip process. The results are helpful for understanding the fault sliding mode and the prediction and prevention of fault slip.http://www.sciencedirect.com/science/article/pii/S1674775522001810Fault activationRock friction mechanicsSliding modesConstant normal stiffness (CNS)Displacement-controlled loading ratesRockburst |
| spellingShingle | Chuanqing Zhang Jie Xu Shengji Jin Guojian Cui Yuhang Guo Lingyu Li Sliding modes of fault activation under constant normal stiffness conditions Journal of Rock Mechanics and Geotechnical Engineering Fault activation Rock friction mechanics Sliding modes Constant normal stiffness (CNS) Displacement-controlled loading rates Rockburst |
| title | Sliding modes of fault activation under constant normal stiffness conditions |
| title_full | Sliding modes of fault activation under constant normal stiffness conditions |
| title_fullStr | Sliding modes of fault activation under constant normal stiffness conditions |
| title_full_unstemmed | Sliding modes of fault activation under constant normal stiffness conditions |
| title_short | Sliding modes of fault activation under constant normal stiffness conditions |
| title_sort | sliding modes of fault activation under constant normal stiffness conditions |
| topic | Fault activation Rock friction mechanics Sliding modes Constant normal stiffness (CNS) Displacement-controlled loading rates Rockburst |
| url | http://www.sciencedirect.com/science/article/pii/S1674775522001810 |
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