A rockburst intensity criterion based on the Geological Strength Index, experiences learned from a deep tunnel

doi:10.1007/s10064-020-01774-2

	A rockburst intensity criterion based on the Geological Strength Index, experiences learned from a deep tunnel
	Zhang, Wei 2; Feng, Xia-Ting 2; Yaxun, Xiao 1; Feng, Guang-Liang 1; Yao, Zhi-Bin 2; Hu, Lei 2; Niu, Wen-Jing 2
刊名	BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
	2020-03-25
页码	19
关键词	Rockburst intensity evaluation Construction stage Rock mass strength Stress-strength ratio of rock mass GSI
ISSN号	1435-9529
DOI	10.1007/s10064-020-01774-2
英文摘要	The occurrence of rockburst is related to the surrounding rock stress and geological rock mass strength. Rockburst occurs frequently during the construction at a deep tunnel in southwest China (a tunnel with a depth of approximately 2080 m, and a length of 13 km), leading to casualties, damage to construction equipment, and schedule delays. The application of the rockburst criteria based on the stress-strength/strength-stress ratio shows that they are not suitable for the construction stage. This paper suggests a simple and feasible rockburst intensity criterion based on the Geological Strength Index (GSI) for the construction stage. In this criterion, the strength of the rock mass exposed during excavation is estimated by the Hoek-Brown criterion and is used to reflect the geological conditions of the surrounding rock, considering the influences of the joint conditions and engineering disturbance. The maximum principal stress along the tunnel is obtained by the in situ stress inversion. The ratio of the rock mass strength to the maximum principal stress (sigma(cm)/sigma(1)) is taken as the evaluation index. The criterion is as follows: sigma(cm)/sigma(1) > 1.2, none rockburst; 0.75 < sigma(cm)/sigma(1) <= 1.2, slight rockburst; 0.4 < sigma(cm)/sigma(1) <= 0.75, moderate rockburst; and sigma(cm)/sigma(1) <= 0.4, intense rockburst. The engineering applications show the reliability of this rockburst intensity criterion. The results of this paper provide a reference for rockburst intensity evaluation during the construction stage of deep tunnels.
资助项目	National Natural Science Foundation of China[51839003] ; National Natural Science Foundation of China[51621006] ; Science and Technology Development Project of China Railway[2017G006-B]
WOS研究方向	Engineering ; Geology
语种	英语
出版者	SPRINGER HEIDELBERG
WOS记录号	WOS:000521772100001
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/23886]
专题	中科院武汉岩土力学所
通讯作者	Feng, Xia-Ting
作者单位	1.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China 2.Northeastern Univ, Minist Educ Safe Min Deep Met Mines, Key Lab, Shenyang 110004, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Wei,Feng, Xia-Ting,Yaxun, Xiao,et al. A rockburst intensity criterion based on the Geological Strength Index, experiences learned from a deep tunnel[J]. BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT,2020:19.
APA	Zhang, Wei.,Feng, Xia-Ting.,Yaxun, Xiao.,Feng, Guang-Liang.,Yao, Zhi-Bin.,...&Niu, Wen-Jing.(2020).A rockburst intensity criterion based on the Geological Strength Index, experiences learned from a deep tunnel.BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT,19.
MLA	Zhang, Wei,et al."A rockburst intensity criterion based on the Geological Strength Index, experiences learned from a deep tunnel".BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT (2020):19.