Influence of loading rate on strainburst: an experimental study

doi:10.1007/s10064-018-1351-1

CORC > 武汉岩土力学研究所 > 中科院武汉岩土力学所 > 岩土力学所知识全产出 > 期刊论文

	Influence of loading rate on strainburst: an experimental study
	Su, Guoshao ; Jiang, Jianqing ; Feng, Xiating ; Jiang, Quan ; Chen, Zhiyong ; Mo, Jinhai
刊名	BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
	2019
卷号	78 期号:5 页码:3559-3573
关键词	Rockburst Strainburst Loading rate Kinetic energy
ISSN号	1435-9529
DOI	10.1007/s10064-018-1351-1
英文摘要	Rockburst is a geological disaster in highly stressed ground. As a typical rockburst, strainburst is an ejection failure phenomenon caused by tangential stress concentration, which is frequently encountered in hard-brittle intact rocks in deep tunnel excavation. To explore the strainburst characteristics, a set of tests on rectangular prismatic granite specimens with different loading rates were conducted using an improved true-triaxial testing machine. During the testing process, a special loading path, namely, keeping one free face and loading on other faces, was adopted to simulate the stress concentration of surrounding rock masses near the opening. High-speed cameras were used to record the failure process on the free face of tested specimens. The speed and the kinetic energy of ejected fragments during strainburst were obtained by analyzing videos recorded using high-speed cameras. The experimental results reveal that the loading rate (simulating the rate of tangential stress concentration) plays an important role with respect to the strainburst characteristics. As the loading rate increases from 0.05 to 5.0MPa/s, the failure mode of tested specimens transfers from static failure (spalling) to dynamic failure (strainburst), and the kinetic energy of ejected fragments during strainburst, as well as the rock strength, increases.
WOS研究方向	Engineering ; Geology
语种	英语
WOS记录号	WOS:000471237400036
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/14956]
专题	岩土力学所知识全产出_期刊论文
作者单位	1.Guangxi Univ, Sch Civil & Architecture Engn, Minist Educ, Key Lab Disaster Prevent & Struct Safety, Nanning 530004, Peoples R China; 2.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Hubei, Peoples R China
推荐引用方式 GB/T 7714	Su, Guoshao,Jiang, Jianqing,Feng, Xiating,et al. Influence of loading rate on strainburst: an experimental study[J]. BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT,2019,78(5):3559-3573.
APA	Su, Guoshao,Jiang, Jianqing,Feng, Xiating,Jiang, Quan,Chen, Zhiyong,&Mo, Jinhai.(2019).Influence of loading rate on strainburst: an experimental study.BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT,78(5),3559-3573.
MLA	Su, Guoshao,et al."Influence of loading rate on strainburst: an experimental study".BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT 78.5(2019):3559-3573.