白鹤滩水电站左岸边坡开挖卸荷过程微震视应力特征研究

doi:10.13722/j.cnki.jrme.2017.0748

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Abstract

Blasting excavation of the rock slope produces geometry changes which will induce stress redistribution within the rock mass. The stress redistribution can be reflected by the apparent stress of micoseismic(MS) events. The apparent stress of MS events increases along with the seismic moment and radiated energy. High apparent stress in rock mass can reflect the disturbance degree subjected to intense blasting excavation. The distribution characteristics of high MS apparent stress in the left bank slope can delineate the main damage regions，which is in good agreement with the result of numerical simulation using the Realistic Failure Process Analysis code in three-dimension(RFPA^3D). The period that the average daily apparent stress reduces strongly and the cumulative apparent volume increases can be regarded as the precursor of the deformation of rock slope. The present achievements can provide some references for the stability evaluation of similar high rock slopes based on microseismic monitoring.

Key words： rock mechanics slope stability apparent stress MS monitoring apparent volume Baihetan hydropower station

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	Articles by authors
	ZHANG Min1
	2
	XU Nuwen1
	2
	CHEN Wenfu3
	TAN Yaosheng3
	DAI Feng1
	JIANG Xiong1
	LI Tao1

Cite this article:

ZHANG Min1,2,XU Nuwen1, et al. Analysis of microseismic apparent stress characteristics of the left bank slope at Baihetan hydropower station subjected to excavation[J]. , 2018, 37(S2): 4133-4142.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2017.0748 OR https://rockmech.whrsm.ac.cn/EN/Y2018/V37/IS2/4133

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