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Shear mechanical properties and energy evolution of rock-like samples containing multiple combinations of non-persistent joints

文献类型：期刊论文

作者Tai, Daping1,2,5; Qi, Shengwen1,2,4,5; Zheng, Bowen1,2,5; Wang, Chonglang3; Guo, Songfeng1,2,5; Luo, Guangming1,2,5
刊名JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING
出版日期2023-07-01
卷号15期号:7页码:1651-1670
关键词Non-persistent joints Shear behavior Energy evolution Particle flow code (PFC3D)
ISSN号1674-7755
DOI10.1016/j.jrmge.2022.11.014
英文摘要Discontinuities are often considered as important factors responsible for the instability caused by shear failure in engineering rock mass, and energy-driven instability is the root cause of rock failure. However, few studies focus on the energy evolution during the failure process using a three-dimensional (3D) numerical model. In this study, a series of laboratory direct shear tests on rock-like samples is numerically simulated using bonded particle models (BPMs) with multiple combinations of discontinuous in the particle flow code (PFC3D), in which the location and size of the particles conform to the uniform distribution. The effects of joint row number and inclination on the stress-strain characteristics and failure mode of rock were studied from the perspective of microcrack growth and energy evolution. The results showed that, when the number of joint rows N-r > 1, the shear failure region does not change with the increase of Nr for the type B (2-columnn multiple-row at center) and the type C (2-column multipl-row at edge) as compared to the type A (1-column multiple-row at center) joint models. Notably, joints significantly increase the post-peak energy dissipation but have little effect on the proportion of energy before the peak. Friction consumes most of the energy while kinetic energy accounts for less than 1% of total energy during the shear process. Peak elastic strain energy follows the variation trend of peak shear displacement. The development and accumulation of microcracks directly affect the energy dissipation, and there is a significant linear relationship between the cumulative number of critical microcracks and the critical dissipated energy at the failure, when the dip direction of joints is opposite to the shear direction, more microcracks will be accumulated at the peak time, resulting in more energy dissipation. The results contribute to deeply understanding the shear failure process of non-persistent jointed mass. (C) 2023 Institute of Rock and Soil Mechanics, Chinese Academy of Sciences. Production and hosting by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
WOS关键词FAILURE PROCESS ; BEHAVIOR ; MODEL ; DEFORMATION ; DISSIPATION ; SANDSTONE ; MASS
资助项目National Natural Science Foundation of China[41825018] ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP)[2019QZKK0904]
WOS研究方向Engineering
语种英语
WOS记录号WOS:001070902700003
出版者SCIENCE PRESS
资助机构National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP)
源URL[http://ir.iggcas.ac.cn/handle/132A11/110789]  
专题地质与地球物理研究所_中国科学院页岩气与地质工程重点实验室
通讯作者Qi, Shengwen
作者单位1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
2.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Shale Gas & Geoengn, Beijing 100029, Peoples R China
3.Univ Toronto, Dept Civil & Mineral Engn, Toronto, ON M5S 1A4, Canada
4.CAS HEC, China Pakistan Joint Res Ctr Earth Sci, Islamabad 45320, Pakistan
5.Chinese Acad Sci, Innovat Acad Earth Sci, Beijing 100029, Peoples R China
推荐引用方式
GB/T 7714		 Tai, Daping,Qi, Shengwen,Zheng, Bowen,et al. Shear mechanical properties and energy evolution of rock-like samples containing multiple combinations of non-persistent joints[J]. JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING,2023,15(7):1651-1670.
APA Tai, Daping,Qi, Shengwen,Zheng, Bowen,Wang, Chonglang,Guo, Songfeng,&Luo, Guangming.(2023).Shear mechanical properties and energy evolution of rock-like samples containing multiple combinations of non-persistent joints.JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING,15(7),1651-1670.
MLA Tai, Daping,et al."Shear mechanical properties and energy evolution of rock-like samples containing multiple combinations of non-persistent joints".JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING 15.7(2023):1651-1670.

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来源：地质与地球物理研究所

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