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Numerical studies on micro-cracking behavior of transversely isotropic argillaceous siltstone in Longyou Grottoes under three-point bending

文献类型：期刊论文

作者Wang, Song1,2,3,4; Zhou, Jian1; Zhang, Luqing2,3,4; Han, Zhenhua2,4; Zhang, Fenxiang5; Fu, Yan6; Yang, Zhifa2,4
刊名THEORETICAL AND APPLIED FRACTURE MECHANICS
出版日期2022-12-01
卷号122页码:19
关键词Longyou Grottoes Three-point bending test Micro -cracking behavior Particle flow code Transverse isotropy
ISSN号0167-8442
DOI10.1016/j.tafmec.2022.103638
英文摘要Longyou Grottoes, the underground projects with a rich history of thousands of years, are one of the key cultural relics to be protected in China and are actively preparing to apply for a world cultural heritage site. However, due to the shallow buried argillaceous siltstone with low-strength bedding planes, some cavern roofs experienced apparent breakages or large-scale collapses. Clarifying the roof deformation and failure mechanism is essential for the long-term protection of the historical relic and sustainable development of tourism. Productive previous work proved that three-point bending tests of rock samples could reproduce stress states of cavern roofs. Therefore, three-point bending numerical models with various bedding plane structures for Longyou argillaceous siltstone are created in this study to investigate the rock mechanical behaviors. The simulation results show that as bedding mechanical properties decrease, the bending strength (BS) has a slow to fast decrease, indicating that timely protection in Longyou Grottoes before the BS drops sharply is conducive to preventing roof failures. This declining trend is further accelerated when the bedding dip angle changes from horizontal to vertical. Dip angles, mechanical properties, and spacings of bedding planes control fracture modes of models. Moreover, the fitted Gutenberg-Richter-type relationships between acoustic emission (AE) moment magnitudes and logarithmic AE events present high average activity levels and high proportions of large AE events in both bedding planes and rock matrix for models with strong, dispersedly distributed, and near-horizontal bedding planes. In summary, the simulation results reveal the impacts of transverse isotropy in surrounding rocks on roof bending failures, which may provide a valuable reference for the reinforcement and protection of Longyou Grottoes.
WOS关键词JOINTED ROCK MASS ; COMPRESSIVE STRENGTH ; MECHANICAL-BEHAVIOR ; PROTECTIVE MEASURES ; TENSILE-STRENGTH ; HEAT-TREATMENT ; MODEL TEST ; CAVERNS ; FAILURE ; SIMULATION
资助项目National Natural Science Foundation of China ; National Key Research and Development Program ; [41972287] ; [42107190] ; [41672321] ; [2018YFB1501801]
WOS研究方向Engineering ; Mechanics
语种英语
WOS记录号WOS:000885288700001
出版者ELSEVIER
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 ; National Key Research and Development Program ; National Key Research and Development Program ; National Key Research and Development Program ; National Key Research and Development Program ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Research and Development Program ; National Key Research and Development Program ; National Key Research and Development Program ; National Key Research and Development Program ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Research and Development Program ; National Key Research and Development Program ; National Key Research and Development Program ; National Key Research and Development Program ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Research and Development Program ; National Key Research and Development Program ; National Key Research and Development Program ; National Key Research and Development Program
源URL[http://ir.iggcas.ac.cn/handle/132A11/107695]  
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Zhou, Jian
作者单位1.Beijing Univ Technol, Key Lab Urban Secur & Disaster Engn, Minist Educ, Beijing 100124, Peoples R China
2.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Shale Gas & Geoengn, Beijing 100029, Peoples R China
3.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing 100049, Peoples R China
4.Chinese Acad Sci, Innovat Acad Earth Sci, Beijing 100029, Peoples R China
5.BGI Engn Consultants Ltd, Beijing 100038, Peoples R China
6.Inst Longyou Grottoes, Quzhou 324400, Peoples R China
推荐引用方式
GB/T 7714		 Wang, Song,Zhou, Jian,Zhang, Luqing,et al. Numerical studies on micro-cracking behavior of transversely isotropic argillaceous siltstone in Longyou Grottoes under three-point bending[J]. THEORETICAL AND APPLIED FRACTURE MECHANICS,2022,122:19.
APA Wang, Song.,Zhou, Jian.,Zhang, Luqing.,Han, Zhenhua.,Zhang, Fenxiang.,...&Yang, Zhifa.(2022).Numerical studies on micro-cracking behavior of transversely isotropic argillaceous siltstone in Longyou Grottoes under three-point bending.THEORETICAL AND APPLIED FRACTURE MECHANICS,122,19.
MLA Wang, Song,et al."Numerical studies on micro-cracking behavior of transversely isotropic argillaceous siltstone in Longyou Grottoes under three-point bending".THEORETICAL AND APPLIED FRACTURE MECHANICS 122(2022):19.

入库方式： OAI收割

来源：地质与地球物理研究所

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