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

	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 1,3,4; Yan, Fei 1; Su, Guoshao 2; Feng, Xiating 1; Xu, Dingping 1; Feng, Guangliang 1
刊名	BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
	2020-10-16
页码	18
关键词	Rockburst Spalling Unloading rate Minimum principal stress Tensile failure
ISSN号	1435-9529
DOI	10.1007/s10064-020-01995-5
英文摘要	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.
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
语种	英语
出版者	SPRINGER HEIDELBERG
WOS记录号	WOS:000578482900003
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/24904]
专题	中科院武汉岩土力学所
通讯作者	Yan, Fei
作者单位	1.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China 2.Guangxi Univ, Sch Civil & Architecture Engn, Key Lab Disaster Prevent & Struct Safety, Minist Educ, Nanning 530004, Peoples R China 3.Uppsala Univ, SE-75105 Uppsala, Sweden 4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
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.