Microdynamic mechanical properties and fracture evolution mechanism of monzogabbro with a true triaxial multilevel disturbance method
文献类型：期刊论文
| 作者 | Zheng, Zhi1,2,3; Deng, Bin1; Liu, Hong1; Wang, Wei3; Huang, Shuling4; Li, Shaojun2 |
| 刊名 | INTERNATIONAL JOURNAL OF MINING SCIENCE AND TECHNOLOGY
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| 出版日期 | 2024-03-01 |
| 卷号 | 34期号:3页码:385-411 |
| 关键词 | True triaxial disturbance test Mechanical properties Fracture evolution mechanism Disturbance-induced damage evolution Failure mechanism and precursor |
| ISSN号 | 2095-2686 |
| DOI | 10.1016/j.ijmst.2024.01.001 |
| 英文摘要 | The far-field microdynamic disturbance caused by the excavation of deep mineral resources and underground engineering can induce surrounding rock damage in high-stress conditions and even lead to disasters. However, the mechanical properties and damage/fracture evolution mechanisms of deep rock induced by microdynamic disturbance under three-dimensional stress states are unclear. Therefore, a true triaxial multilevel disturbance test method is proposed, which can completely simulate natural geostress, excavation stress redistribution (such as stress unloading, concentration and rotation), and subsequently the microdynamic disturbance triggering damaged rock failure. Based on a dynamic true triaxial test platform, true triaxial microdynamic disturbance tests under different frequency and amplitudes were carried out on monzogabbro. The results show that increasing amplitude or decreasing frequency diminishes the failure strength of monzogabbro. Deformation modulus gradually decreases during disturbance failure. As frequency and amplitude increase, the degradation rate of deformation modulus decreases slightly, disturbance dissipated energy increases significantly, and disturbance deformation anisotropy strengthens obviously. A damage model has been proposed to quantitatively characterize the disturbance-induced damage evolution at different frequency and amplitude under true triaxial stress. Before disturbance failure, the micro-tensile crack mechanism is dominant, and the micro-shear crack mechanism increases significantly at failure. With the increase of amplitude and frequency, the micro-shear crack mechanism increases. When approaching disturbance failure, the acoustic emission fractal dimension changes from a stable value to local large oscillation, and finally increases sharply to a high value at failure. Finally, the disturbance-induced failure mechanism of surrounding rock in deep engineering is clearly elucidated. (c) 2024 Published by Elsevier B.V. on behalf of China University of Mining & Technology.ity of Mining & Technology. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/ licenses/by-nc-nd/4.0/). |
| 资助项目 | National Natural Science Foundation of China[52109119] ; Guangxi Natural Science Foundation[2021GXNSFBA075030] ; Guangxi Science and Technology Project[Guike AD20325002] ; Chinese Postdoctoral Science Fund Project[2022M723408] ; 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)[IWHR-SKL-202202] |
| WOS研究方向 | Mining & Mineral Processing |
| 语种 | 英语 |
| WOS记录号 | WOS:001298138300001 |
| 出版者 | ELSEVIER |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/42376]  |
| 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 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 2.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China 3.Hohai Univ, Key Lab Minist Educ Geomech & Embankment Engn, Nanjing 210098, Peoples R China 4.Changjiang River Sci Res Inst, Minist Water Resources, Key Lab Geotech Mech & Engn, Wuhan 430015, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zheng, Zhi,Deng, Bin,Liu, Hong,et al. Microdynamic mechanical properties and fracture evolution mechanism of monzogabbro with a true triaxial multilevel disturbance method[J]. INTERNATIONAL JOURNAL OF MINING SCIENCE AND TECHNOLOGY,2024,34(3):385-411. |
| APA | Zheng, Zhi,Deng, Bin,Liu, Hong,Wang, Wei,Huang, Shuling,&Li, Shaojun.(2024).Microdynamic mechanical properties and fracture evolution mechanism of monzogabbro with a true triaxial multilevel disturbance method.INTERNATIONAL JOURNAL OF MINING SCIENCE AND TECHNOLOGY,34(3),385-411. |
| MLA | Zheng, Zhi,et al."Microdynamic mechanical properties and fracture evolution mechanism of monzogabbro with a true triaxial multilevel disturbance method".INTERNATIONAL JOURNAL OF MINING SCIENCE AND TECHNOLOGY 34.3(2024):385-411. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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