Energy Characteristics of Micro-Seismic Events Associated with Immediate Rockbursts in Deep Tunnels

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	Energy Characteristics of Micro-Seismic Events Associated with Immediate Rockbursts in Deep Tunnels
	Yu, Yang 1; Chen, Bing-Rui 2; Xu, Chang-Jie 1; Diao, Xin-Hong 1; Tong, Li-Hong 1; Shi, Yu-Feng 1
	2016
会议日期	JUL 25-27, 2016
会议地点	Shangdong, PEOPLES R CHINA
关键词	Drill-and-blast method (DBM) Tunnel boring machine (TBM) Immediate rock burst Micro-seismic events Micro-seismic energy Rockburst intensity
期号	260
页码	218-225
英文摘要	This study integrates micro-seismic data and data from hundreds of rockbursts of different intensities that occurred in four deep headrace tunnels and one water drainage tunnel at Jinping II hydropower station in Sichuan province, China. The overburden of the studied tunnels is between 1900 m and 2525 m, largely excavated in marble. The tunnels have a total length of 12.4 km. The micro-seismic energy produced during the development of immediate rockbursts excavated with the drill-and-blast method (DBM) and a tunnel boring machine (TBM) were studied. The results indicated that the daily maximum micro-seismic energy can be used as a basis for estimating the rockburst intensity: no rockburst, weak rockbursts, moderate rockbursts, and intense rockbursts, and that the common logarithms of the micro-seismic energy of each level was < 4, > 4 and < 5, > 5 and < 6, > 6, respectively. For the same intensity, rockbursts excavated by TBM and DBM have the same range but different distribution characteristics. The micro-seismic energy can be used as a guide to establish a dynamic warning system based on the evolution of micro-seismic events to reduce the risk of immediate rockbursts during excavation of deep, hard-rock tunnels.
会议录	GEO-CHINA 2016: EMERGING TECHNOLOGIES IN TUNNEL ENGINEERING, MODELING, DESIGN, CONSTRUCTION, REPAIR, AND REHABILITATION
会议录出版者	AMER SOC CIVIL ENGINEERS
会议录出版地	NEW YORK
语种	英语
WOS研究方向	Construction & Building Technology ; Engineering
WOS记录号	WOS:000400180100027
内容类型	会议论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/4902]
专题	岩土力学所知识全产出_会议论文国家重点实验室知识产出_会议论文
作者单位	1.East China Jiaotong Univ, Coll Civil Engn & Architecture ; 2.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn
推荐引用方式 GB/T 7714	Yu, Yang,Chen, Bing-Rui,Xu, Chang-Jie,et al. Energy Characteristics of Micro-Seismic Events Associated with Immediate Rockbursts in Deep Tunnels[C]. 见:. Shangdong, PEOPLES R CHINA. JUL 25-27, 2016.