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Morphological features and fractography analysis for in situ spalling in the China Jinping underground laboratory with a 2400 m burial depth

文献类型：期刊论文

作者Jiang, Quan2; Yang, Bing1,2; Yan, Fei2; Xu, Dingping2; Feng, Guangliang2; Li, Shaojun2
刊名TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
出版日期2021-12-01
卷号118页码:16
关键词Underground engineering Rock spalling Surface morphology Branching criterion Roughness anisotropy
ISSN号0886-7798
DOI10.1016/j.tust.2021.104194
英文摘要Brittle spalling of hard rock is a typical failure in deep underground engineering that induces challenges for construction safety. Seventy marble spalling samples were collected from the China Jinping Underground Laboratory Phase-II (CJPL-II) to analyse their mesoscopic morphology and failure mechanism. The 3D scanning and corresponding statistical analysis indicated that the spalling surfaces were not smooth but with low roughness and evident anisotropy, and that the morphological transition (i.e. from the mirror zone to the mist zone then to the hackle zone) on the spalling surface was observed. The fractography of the CJPL-II spalling samples showed typical features of brittle fracture dominated by the granular morphology of intergranular fracture based on the Scanning Electron Microscope technology. What's more, the simulated spalling by the laboratorial true triaxial unloading tests showed similar morphology with that of CJPL-II spalling. Moreover, by comparing the marble spalling samples with other granite spalling and basalt sapling samples, the effect of the mineral particle size of the surrounding rock on the roughness of the spalling slice was discussed. This study deepens the understanding of the in-situ spalling mechanism of hard rock under high geostress conditions.
资助项目National Natural Science Foundation of China[U1965205] ; National Natural Science Foundation of China[51779251] ; Hubei Province Outstanding Youth Fund[2017CFA060]
WOS研究方向Construction & Building Technology ; Engineering
语种英语
WOS记录号WOS:000706183000002
出版者PERGAMON-ELSEVIER SCIENCE LTD
源URL[http://119.78.100.198/handle/2S6PX9GI/28518]  
专题中科院武汉岩土力学所
通讯作者Yan, Fei
作者单位1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
2.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		 Jiang, Quan,Yang, Bing,Yan, Fei,et al. Morphological features and fractography analysis for in situ spalling in the China Jinping underground laboratory with a 2400 m burial depth[J]. TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY,2021,118:16.
APA Jiang, Quan,Yang, Bing,Yan, Fei,Xu, Dingping,Feng, Guangliang,&Li, Shaojun.(2021).Morphological features and fractography analysis for in situ spalling in the China Jinping underground laboratory with a 2400 m burial depth.TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY,118,16.
MLA Jiang, Quan,et al."Morphological features and fractography analysis for in situ spalling in the China Jinping underground laboratory with a 2400 m burial depth".TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY 118(2021):16.

入库方式： OAI收割

来源：武汉岩土力学研究所

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