Research on Temperal-spatial Characteristics of Microseismic Activity in Hard Rock Tunnel at Baihetan Hydropower Station

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	Research on Temperal-spatial Characteristics of Microseismic Activity in Hard Rock Tunnel at Baihetan Hydropower Station
	Liu, Huaji; Chen, Bingrui; Xiao, Yaxun
	2017
会议日期	MAR 25-25, 2017
会议地点	Guangzhou, PEOPLES R CHINA
关键词	underground cavern microseismic monitoring underground water excavation rate structural plane
卷号	124
页码	110-116
英文摘要	The underground cavern group of Baihetan hydropower station is characteristic with complex geological condition, large buried depth and high stress, the local failures of surrounding rock mass which often occurred frequently during the construction process. To study the mechanisms of failures result from the unloading effect of excavation, in situ microseismic monitoring system was established on the No. 1 construction branch tunnel of spillway tunnel located on the left bank of Baihetan Hydropower Station, the relation between microseismic activity, geological condition and failures of surrounding rock is studied. The results show that: 1) the region with abundant underground water was hard to gather stress and energy quickly in short time. 2) a low excavation rate weakened the risk of the failure of the surrounding rock of hard rock tunnel because of the unload effect of excavation. 3) the microseismic events were more active on north side of the tunnel and assembled on the north spandrel with opening structure plane. 4) the risk of rockburst in the microseismic monitoring tunnel during the excavation is low. The research results provide reference for the optimization of the excavation and support and are meaningful for reducing the risk of the rock failures during the excavation.
会议录	PROCEEDINGS OF THE 2017 2ND INTERNATIONAL SYMPOSIUM ON ADVANCES IN ELECTRICAL, ELECTRONICS AND COMPUTER ENGINEERING (ISAEECE 2017)
会议录出版者	ATLANTIS PRESS
会议录出版地	PARIS
语种	英语
WOS研究方向	Engineering
WOS记录号	WOS:000417221100021
内容类型	会议论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/4928]
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	Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn
推荐引用方式 GB/T 7714	Liu, Huaji,Chen, Bingrui,Xiao, Yaxun. Research on Temperal-spatial Characteristics of Microseismic Activity in Hard Rock Tunnel at Baihetan Hydropower Station[C]. 见:. Guangzhou, PEOPLES R CHINA. MAR 25-25, 2017.