In Situ Observation of Rock Spalling in the Deep Tunnels of the China Jinping Underground Laboratory (2400 m Depth)

doi:10.1007/s00603-017-1387-8

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	In Situ Observation of Rock Spalling in the Deep Tunnels of the China Jinping Underground Laboratory (2400 m Depth)
	Feng, Xia-Ting1 ; Xu, Hong 1; Qiu, Shi-Li 2; Li, Shao-Jun 2; Yang, Cheng-Xiang 1; Guo, Hao-Sen 1; Cheng, Yuan 2; Gao, Yao-Hui 2
刊名	ROCK MECHANICS AND ROCK ENGINEERING
	2018
卷号	51 期号:4 页码:1193-1213
关键词	Spalling Jinping Underground Laboratory Marble tunnel Photogrammetry Quantitative characteristics
ISSN号	0723-2632
DOI	10.1007/s00603-017-1387-8
英文摘要	To study rock spalling in deep tunnels at China Jinping Underground Laboratory Phase II (CJPL-II), photogrammetry method and digital borehole camera were used to quantify key features of rock spalling including orientation, thickness of slabs and the depth of spalling. The failure mechanism was analysed through scanning electron microscope and numerical simulation based on FLAC(3D). Observation results clearly showed the process of rock spalling failure: a typical spalling pattern around D-shaped tunnels after top-heading and bottom bench were discovered. The orientation and thickness of the slabs were obtained. The slabs were parallel to the excavated surfaces of the tunnel and were related to the shape of the tunnel surface and orientation of the principal stress. The slabs were alternately thick and thin, and they gradually increased in thickness from the sidewall inwards. The form and mechanism of spalling at different locations in the tunnels, as influenced by stress state and excavation, were analysed. The result of this study was helpful to those rethinking the engineering design, including the excavation and support of tunnels, or caverns, at high risk of spalling.
WOS研究方向	Engineering ; Geology
语种	英语
出版者	SPRINGER WIEN
WOS记录号	WOS:000427802600013
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/4252]
专题	岩土力学所知识全产出_期刊论文国家重点实验室知识产出_期刊论文
作者单位	1.Northeastern Univ, Key Lab, Minist Educ Safe Min Deep Met Mines ; 2.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn
推荐引用方式 GB/T 7714	Feng, Xia-Ting,Xu, Hong,Qiu, Shi-Li,et al. In Situ Observation of Rock Spalling in the Deep Tunnels of the China Jinping Underground Laboratory (2400 m Depth)[J]. ROCK MECHANICS AND ROCK ENGINEERING,2018,51(4):1193-1213.
APA	Feng, Xia-Ting.,Xu, Hong.,Qiu, Shi-Li.,Li, Shao-Jun.,Yang, Cheng-Xiang.,...&Gao, Yao-Hui.(2018).In Situ Observation of Rock Spalling in the Deep Tunnels of the China Jinping Underground Laboratory (2400 m Depth).ROCK MECHANICS AND ROCK ENGINEERING,51(4),1193-1213.
MLA	Feng, Xia-Ting,et al."In Situ Observation of Rock Spalling in the Deep Tunnels of the China Jinping Underground Laboratory (2400 m Depth)".ROCK MECHANICS AND ROCK ENGINEERING 51.4(2018):1193-1213.