Effects of Amplitude and Frequency on Shear Behaviors and Mechanisms of Limestone Structural Planes Under True Triaxial Stress
文献类型：期刊论文
| 作者 | Zheng, Zhi4,5,6; Meng, Xiangmeng6; Feng, Guangliang4; Lu, Gaoming3; Hu, Xiaochuan2; Niu, Wenjing1; Huang, Xiaohua6 |
| 刊名 | ROCK MECHANICS AND ROCK ENGINEERING
 |
| 出版日期 | 2025-03-10 |
| 页码 | 36 |
| 关键词 | True triaxial test Rockmass structural planes Disturbance shear 3D stress excavation |
| ISSN号 | 0723-2632 |
| DOI | 10.1007/s00603-025-04483-y |
| 英文摘要 | Blasting excavation and mechanical vibration in underground engineering often induce "three-dimension (3D) stress + dynamic disturbance" coupled failure of rockmass structural planes, leading to engineering disasters. However, the disturbance effects on rockmass structural planes under 3D stress are unclear. Therefore, true triaxial shear disturbance tests with different amplitude (A) and frequency (f) were carried on limestone structural planes with acoustic emission (AE) monitoring. The effects of A and f on mechanical properties and failure characteristics were systematically studied. The disturbance damage evolution and energy release characteristics, shear fracture evolution process, microscopic fracture mechanisms, and failure precursor were further revealed. As the A and f increase, the shear failure stress and critical strength of limestone structural planes rapidly decrease and then converge. As the A increases, the disturbance strain energy (U) at failure significantly increases, the proportion of dissipated energy (Ud) changes little, while as the f increases, the U at failure gradually decreases, the proportion of Ud increases. Furthermore, through the analysis of AE signals, the failure mechanism of limestone structural planes is primarily the shear-tensile mixed failure mode dominated by tensile cracks. As the shear stress increases, the proportion of shear cracks gradually increases. As the A increases, the proportion of shear cracks first decreases slightly and then increases significantly. As failure approaches, the number of AE events increases rapidly, with a large number of high-energy events occur mainly focusing on shear failure surfaces, especially as the A increases, the trendy become more pronounced. Near the failure, the b-value shows a continuous and significant downward trend, reaching the minimum at the time of failure, the high A signal increases significantly, and the fractal dimension (Dt) decreases rapidly to the minimum. The variation in lgN/b is opposite to that of the b-value, but remains relatively stable during the early stages of failure, with more pronounced changes at failure, which makes it a more suitable indicator for shear failure precursors. |
| 资助项目 | the National Natural Science Foundation of China[52109119] ; National Natural Science Foundation of China[2025GXNSFAA069165] ; Guangxi Natural Science Foundation[2022M723408] ; Chinese Postdoctoral Science Fund Project[AA23023016] ; Major Project of Guangxi Science and Technology |
| WOS研究方向 | Engineering ; Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:001440810500001 |
| 出版者 | SPRINGER WIEN |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/36834]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Zheng, Zhi |
| 作者单位 | 1.Guangxi Univ, Coll Resources Environm & Mat, Nanning 530004, Guangxi, Peoples R China 2.Civil Engn Grp Corp China Second Engn Bur LTD, Beijing 101100, Peoples R China 3.China Railway Tunnel Grp Co Ltd, State Key Lab Shield Machine & Boring Technol, Zhengzhou 450001, Peoples R China 4.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China 5.Northeastern Univ, Key Lab, Minist Educ Safe Min Deep Met Mines, Shenyang 110819, Peoples R China 6.Guangxi Univ, Coll Civil Engn & Architecture, State Key Lab Featured Met Mat & Life Cycle Safety, Key Lab Disaster Prevent & Struct Safety,Minist Ed, Nanning 530004, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zheng, Zhi,Meng, Xiangmeng,Feng, Guangliang,et al. Effects of Amplitude and Frequency on Shear Behaviors and Mechanisms of Limestone Structural Planes Under True Triaxial Stress[J]. ROCK MECHANICS AND ROCK ENGINEERING,2025:36. |
| APA | Zheng, Zhi.,Meng, Xiangmeng.,Feng, Guangliang.,Lu, Gaoming.,Hu, Xiaochuan.,...&Huang, Xiaohua.(2025).Effects of Amplitude and Frequency on Shear Behaviors and Mechanisms of Limestone Structural Planes Under True Triaxial Stress.ROCK MECHANICS AND ROCK ENGINEERING,36. |
| MLA | Zheng, Zhi,et al."Effects of Amplitude and Frequency on Shear Behaviors and Mechanisms of Limestone Structural Planes Under True Triaxial Stress".ROCK MECHANICS AND ROCK ENGINEERING (2025):36. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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