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Influence of loading rate on strainburst: an experimental study
Su, Guoshao; Jiang, Jianqing; Feng, Xiating; Jiang, Quan; Chen, Zhiyong; Mo, Jinhai
2019
Source PublicationBULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
ISSN1435-9529
Volume78Issue:5Pages:3559-3573
AbstractRockburst 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.
KeywordRockburst Strainburst Loading rate Kinetic energy
DOI10.1007/s10064-018-1351-1
Indexed BySCI
Language英语
WOS Research AreaEngineering ; Geology
WOS SubjectEngineering, Environmental ; Engineering, Geological ; Geosciences, Multidisciplinary
WOS IDWOS:000471237400036
Citation statistics
Cited Times:5[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://119.78.100.198/handle/2S6PX9GI/14956
Collection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
Affiliation1.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
Recommended Citation
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.
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