Disturbance mechanical behaviors and anisotropic fracturing mechanisms of rock under novel three-stage true triaxial static-dynamic coupling loading
文献类型：期刊论文
| 作者 | Zheng, Zhi1,2,3; Deng, Bin2; Li, Shaojun3; Zheng, Hong3 |
| 刊名 | ROCK MECHANICS AND ROCK ENGINEERING
 |
| 出版日期 | 2023-12-24 |
| 页码 | 24 |
| 关键词 | True triaxial static-dynamic test Macro and mesoscopic failure Disturbance anisotropic behaviors Disturbance damage/strain rate evolution Disturbance fracturing mechanism |
| ISSN号 | 0723-2632 |
| DOI | 10.1007/s00603-023-03696-3 |
| 英文摘要 | The surrounding rock in deep underground engineering is often subjected to true three-dimensional high-stress conditions. Excavation unloading results in changes in the stress state and induces damage in the surrounding rock, subsequently, dynamic disturbance triggers catastrophic in the damaged surrounding rock and increases the risk of engineering. Therefore, it is necessary to elucidate the dynamic mechanical behavior and fracture evolution mechanisms of deep surrounding rock. In this study, a novel three-stage true triaxial static-dynamic coupling loading test method was proposed to model stress paths experienced by the rock during disturbance failure after excavation damage in deep engineering. With acoustic emission (AE) monitoring, a set of true triaxial tests was conducted to investigate the influence of initial damage degree on the disturbance mechanical properties and failure mechanisms of monzogabbro, including bearing capacity, deformation, macro and mesoscopic fracture characteristics, and anisotropic disturbance fracture evolution mechanisms. AE activity can reflect the disturbance failure processes (decay stage, steady stage, and accelerated stage), and tensile-shear mechanisms evolution based on AE parameters AF/RA are well investigated. The disturbance critical stress is defined and calculated based on the disturbance life, and it can be used as the criterion for rock disturbance failure. The transition conditions of disturbance deformation in three stages can be linked with static strains corresponding to damage stress and peak strength under true triaxial stress. When initial damage degree increases from 80 to 93% of peak strength, disturbance life of monzogabbro decreases by 98%, deformation differential index DI values increases by 31%, and the disturbance failure mode changes from localized tensile splitting failure/ tensile-shear mixed failure to macroscopic shear failure. The study also explores the implications of initial damage degree on the disturbance fracture mechanisms of different buried depths and deteriorated surrounding rock. A novel three-stage true triaxial static-dynamic coupling loading (TTSDC) test method is proposed for modelling the excavation-induced damage and then far-field disturbance fracture of surrounding rock in deep engineering.With the increase of initial damage degree, the disturbance life of monzogabbro decreases, and the disturbance failure mode changes from localized tensile splitting failure/tensile-shear mixed failure to macroscopic shear failure.A new differential index is proposed to characterize the influence of initial damage degree on disturbance deformation anisotropy.The tensile-shear mechanism during disturbance failure evolution is well investigated with AE parameters.The triggering conditions of rock disturbance failure evolution under true triaxial stress are interpreted. |
| 资助项目 | National Natural Science Foundation of China[52109119] ; National Natural Science Foundation of China[2021GXNSFBA075030] ; Guangxi Natural Science Foundation ; Guangxi Science and Technology Project[2022M723408] ; Chinese Postdoctoral Science Fund Project[No.IWHR-SKL-202202] ; Open Research Fund of State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin (China Institute of Water Resources and Hydropower Research) |
| WOS研究方向 | Engineering ; Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:001131675500002 |
| 出版者 | SPRINGER WIEN |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/40140]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Zheng, Zhi |
| 作者单位 | 1.China Inst Water Resources & Hydropower Res, State Key Lab Simulat & Regulat Water Cycle River, Beijing 100038, Peoples R China 2.Guangxi Univ, Coll Civil Engn & Architecture, Key Lab Disaster Prevent & Struct Safety, Minist Educ,State Key Lab Featured Met Mat & Life, Nanning 530004, Peoples R China 3.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zheng, Zhi,Deng, Bin,Li, Shaojun,et al. Disturbance mechanical behaviors and anisotropic fracturing mechanisms of rock under novel three-stage true triaxial static-dynamic coupling loading[J]. ROCK MECHANICS AND ROCK ENGINEERING,2023:24. |
| APA | Zheng, Zhi,Deng, Bin,Li, Shaojun,&Zheng, Hong.(2023).Disturbance mechanical behaviors and anisotropic fracturing mechanisms of rock under novel three-stage true triaxial static-dynamic coupling loading.ROCK MECHANICS AND ROCK ENGINEERING,24. |
| MLA | Zheng, Zhi,et al."Disturbance mechanical behaviors and anisotropic fracturing mechanisms of rock under novel three-stage true triaxial static-dynamic coupling loading".ROCK MECHANICS AND ROCK ENGINEERING (2023):24. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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