Experimental Study of Remotely Triggered Rockburst Induced by a Tunnel Axial Dynamic Disturbance Under True-Triaxial Conditions

doi:10.1007/s00603-017-1218-y

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	Experimental Study of Remotely Triggered Rockburst Induced by a Tunnel Axial Dynamic Disturbance Under True-Triaxial Conditions
	Jiang, Jianqing 1; Su, Guoshao 1,2; Feng, Xiating2 ; Wang, Jinhuan 1; Hu, Lihua 1
刊名	ROCK MECHANICS AND ROCK ENGINEERING
	2017
卷号	50 期号:8 页码:2207-2226
关键词	Rockburst Remotely triggered rockburst Dynamic disturbance True-triaxial test
ISSN号	0723-2632
DOI	10.1007/s00603-017-1218-y
英文摘要	During deep underground excavation, dynamic ejection failure of a highly stressed rock mass near an excavated boundary is easily triggered by a dynamic disturbance in the tunnel axial direction, induced by blasting on the tunnel face. Such a dynamic ejection failure is usually called remotely triggered rockburst, and it poses a threat to underground construction. To clarify the characteristics of remotely triggered rockburst, the development of remotely triggered rockbursts of granite rock specimens was investigated using an improved true-triaxial test system. Experimental results show that with increasing static Z-direction stress (i.e., in situ tangential stress on the cross section of the tunnel), rockburst is triggered more easily and the kinetic energy of ejected fragments increases. Under other constant static stresses and dynamic disturbance, with increasing horizontal stress including X-direction stress (i.e., in situ axial stress) or Y-direction stress (i.e., in situ radial stress on the cross section of the tunnel), rockburst is more difficult to trigger and the kinetic energy of the ejected fragments decreases. Under constant static stresses, once the amplitude and frequency of the dynamic loading exceed their thresholds, the rockburst intensity increases rapidly and the rockburst can be triggered much more easily with small increments of the amplitude and frequency. Furthermore, Z-direction strain increases during the dynamic disturbance process, indicating that the ultimate energy-storage capacity of the specimen decreases with increasing damage. When the elastic strain energy is greater than the ultimate energy-storage capacity of the damaged specimen, part of the residual elastic energy is converted into kinetic energy of the ejected fragments.
WOS研究方向	Engineering ; Geology
语种	英语
出版者	SPRINGER WIEN
WOS记录号	WOS:000407321700016
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/4112]
专题	岩土力学所知识全产出_期刊论文岩土力学所知识全产出国家重点实验室知识产出_期刊论文
作者单位	1.Guangxi Univ, Sch Civil & Architecture Engn, Key Lab Disaster Prevent & Struct Safety, Minist Educ; 2.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn
推荐引用方式 GB/T 7714	Jiang, Jianqing,Su, Guoshao,Feng, Xiating,et al. Experimental Study of Remotely Triggered Rockburst Induced by a Tunnel Axial Dynamic Disturbance Under True-Triaxial Conditions[J]. ROCK MECHANICS AND ROCK ENGINEERING,2017,50(8):2207-2226.
APA	Jiang, Jianqing,Su, Guoshao,Feng, Xiating,Wang, Jinhuan,&Hu, Lihua.(2017).Experimental Study of Remotely Triggered Rockburst Induced by a Tunnel Axial Dynamic Disturbance Under True-Triaxial Conditions.ROCK MECHANICS AND ROCK ENGINEERING,50(8),2207-2226.
MLA	Jiang, Jianqing,et al."Experimental Study of Remotely Triggered Rockburst Induced by a Tunnel Axial Dynamic Disturbance Under True-Triaxial Conditions".ROCK MECHANICS AND ROCK ENGINEERING 50.8(2017):2207-2226.