基于三维数值模拟和微震监测的水工岩质边坡稳定性分析

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Abstract An analytical method for stability analysis of hydraulic rock slope incorporating microseismic monitoring and stress field analysis，was established. The initiation，propagation，extension，interaction and coalescence mechanisms of microcracks during the progressive failure processes of the left bank slope at Jinping I hydropower station were investigated using realistic failure process analysis code in three dimensions(RFPA3D). The whole instability failure mechanism of rock slope was revealed. The spatial evolution regularity of stress field and microseismicity of the rock slope during progressive failure processes were discussed；and research method was thus formed to reveal macroscopic rock mass structures failure from mesoscopic damage evolution processes. The comprehensive researches show that the weak structure planes such as faults F5，F2 and lamprophyre X are one of the key factors controlling the failure modes of the left bank slope. The potential sliding surface and its acoustic emission of the rock slope obtained by RFPA3D are in good agreement with the trend of spatial macro evolution of rockmass microcracks captured by microseismic monitoring system.

Key words： slope engineering Jinping I hydropower station rock slope stability numerical simulation microseismic monitoring

Received: 13 August 2012

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https://rockmech.whrsm.ac.cn/EN/Y2013/V32/I7/1373

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