Fracture of rocks in the mountains of Southeast Tibet under hydrothermal conditions at different elevations

doi:10.1007/s10064-020-01806-x

CORC > 成都山地灾害与环境研究所 > 中国科学院水利部成都山地灾害与环境研究所 > 山地灾害与地表过程重点实验室

	Fracture of rocks in the mountains of Southeast Tibet under hydrothermal conditions at different elevations
	Wu, Yong 1,2; Wang, Yongxiang 3; Haim, Waisman 3; He, Siming 1,2; Li, Xinpo 1,2
刊名	BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
	2020-05-04
卷号	79 期号:8 页码:4291-4308
关键词	Rock collapse Fracture mechanics Water-heat combination Crack models Mountains of Southeast Tibet XFEM
ISSN号	1435-9529
DOI	10.1007/s10064-020-01806-x
产权排序	1
文献子类	Article
英文摘要	Significant changes in the hydrothermal conditions in the mountains of Southeast Tibet result in frequent propagation of cracks and disintegration of rock masses. The mechanism that drives this fracturing process might vary considerably depending on elevation. In this work, we employed computational fracture mechanics to study three different fracture mechanisms in which ice or water drives crack propagation. These case studies were corroborated by field observations at low, intermediate, and high elevations. We employed a novel extended finite element method (XFEM), which could be used to propagate cracks without remeshing, to study the effects of the driving forces, crack geometry, and characteristics of perilous rocks. It was found that stress intensity factors induced by freezing of water or by thermal expansion of ice were much higher than induced by hydrostatic pressure, and they resulted in smaller critical crack lengths and tinier collapses at intermediate or high elevations. Moreover, the effects of crack inclination and propagation could have considerable impact on rock collapse. In particular, long cracks with large outward inclination located near the free surface of perilous rocks would tend to fracture easily.
电子版国际标准刊号	1435-9537
资助项目	National Key R&D Program of China[2018YFC1505003-5] ; National Key R&D Program of China[2016YFB0201003] ; National Natural Science Foundation of China[41672356] ; 135 Strategic Program of the Institute ofMountain Hazards and Environment, CAS[SDS-135-1704]
WOS关键词	STRESS INTENSITY FACTORS ; MECHANICAL-PROPERTIES ; FROST HEAVE ; THERMAL EXPANSION ; CRACK-GROWTH ; ICE ; XFEM ; AVALANCHES ; STRENGTH ; DAMAGE
WOS研究方向	Engineering ; Geology
语种	英语
出版者	SPRINGER HEIDELBERG
WOS记录号	WOS:000530226300001
资助机构	National Key R&D Program of China ; National Natural Science Foundation of China ; 135 Strategic Program of the Institute ofMountain Hazards and Environment, CAS
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/34604]
专题	成都山地灾害与环境研究所_山地灾害与地表过程重点实验室
通讯作者	Wu, Yong
作者单位	1.Chinese Acad Sci, Inst Mt Hazards & Environm, Chengdu 610041, Peoples R China; 2.Chinese Acad Sci, Key Lab Mt Hazards & Earth Surface Proc, Chengdu 610041, Peoples R China; 3.Columbia Univ, Dept Civil Engn & Engn Mech, New York, NY 10027 USA
推荐引用方式 GB/T 7714	Wu, Yong,Wang, Yongxiang,Haim, Waisman,et al. Fracture of rocks in the mountains of Southeast Tibet under hydrothermal conditions at different elevations[J]. BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT,2020,79(8):4291-4308.
APA	Wu, Yong,Wang, Yongxiang,Haim, Waisman,He, Siming,&Li, Xinpo.(2020).Fracture of rocks in the mountains of Southeast Tibet under hydrothermal conditions at different elevations.BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT,79(8),4291-4308.
MLA	Wu, Yong,et al."Fracture of rocks in the mountains of Southeast Tibet under hydrothermal conditions at different elevations".BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT 79.8(2020):4291-4308.