Effect of initial minimum principal stress and unloading rate on the spalling and rockburst of marble: a true triaxial experiment investigation

doi:10.1007/s10064-020-01995-5

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	Effect of initial minimum principal stress and unloading rate on the spalling and rockburst of marble: a true triaxial experiment investigation
	Jiang, Quan 1; Zhang, Meizhu 1,2,3; Yan, Fei 1; Su, Guoshao 4; Feng, Xiating1 ; Xu, Dingping 1; Feng, Guangliang 1
	2020-10-16
发表期刊	BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
ISSN	1435-9529
期号	-页码:18
摘要	Hard rock often performs as brittle failures, such as cracking, spalling, and rockburst, induced by excavation in deep underground engineering. To understand the effect of the minimum principal stress and unloading rate on the spalling and rockburst of marble, unloading experiments were carried out by using true triaxial equipment combined with a high-speed camera, acoustic emission instrumentation, and scanning electron microscope. The experimental results showed that the failure process of marble specimens was more stable and less inclined to exhibit dynamic ejection with a low strain energy release per unit time under a low unloading rate. At the same time, the initial minimum principal stress controlled the marble's failure mode by changing its mode from predominantly shear failure to shear-tension failure as the minimum principal stress decreased, similar to the spalling behaviors of surrounding rock observed in the underground tunnel. What's more, the dynamic rockburst of the marble specimen was simulated under the condition with a high unloading rate, high initial minimum principal, and free face on the specimen. Based on these experimental investigations, a flowchart was also presented to estimate the possible failure mode of marble specimens under different initial minimum principal stress and unloading rate conditions, which would be conducive to the disaster prevention of hard rock in deep underground engineering.
关键词	Rockburst Spalling Unloading rate Minimum principal stress Tensile failure
DOI	10.1007/s10064-020-01995-5
收录类别	SCI
语种	英语
资助项目	NationalNatural Science Foundation of China[U1965205] ; NationalNatural Science Foundation of China[51779251] ; Hubei Province Outstanding Youth Fund of China[2017CFA060]
WOS研究方向	Engineering ; Geology
WOS类目	Engineering, Environmental ; Engineering, Geological ; Geosciences, Multidisciplinary
WOS记录号	WOS:000578482900003
出版者	SPRINGER HEIDELBERG
引用统计	被引频次：30[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://119.78.100.198/handle/2S6PX9GI/24905
专题	中科院武汉岩土力学所
作者单位	1.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Uppsala Univ, SE-75105 Uppsala, Sweden 4.Guangxi Univ, Sch Civil & Architecture Engn, Key Lab Disaster Prevent & Struct Safety, Minist Educ, Nanning 530004, Peoples R China
第一作者单位	中科院武汉岩土力学所
推荐引用方式 GB/T 7714	Jiang, Quan,Zhang, Meizhu,Yan, Fei,et al. Effect of initial minimum principal stress and unloading rate on the spalling and rockburst of marble: a true triaxial experiment investigation[J]. BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT,2020(-):18.
APA	Jiang, Quan.,Zhang, Meizhu.,Yan, Fei.,Su, Guoshao.,Feng, Xiating.,...&Feng, Guangliang.(2020).Effect of initial minimum principal stress and unloading rate on the spalling and rockburst of marble: a true triaxial experiment investigation.BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT(-),18.
MLA	Jiang, Quan,et al."Effect of initial minimum principal stress and unloading rate on the spalling and rockburst of marble: a true triaxial experiment investigation".BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT .-(2020):18.

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