岩石边坡微震监测安全预警与应用

Safety Forecasting Based on Microseismic Monitoring and Its Application to Rock Slope

针对锦屏一级水电站左岸边坡突出的稳定性问题,结合微震监测技术,研究了边坡预警框架、微震预警功能、多元信息融合判据,构建边坡稳定性安全预警体系,提出锦屏一级水电站左岸边坡预警思路,建立基于微震监测的边坡稳定性局部预警方法、考虑微震损伤效应的边坡稳定性整体预警方法以及多元信息融合判据的综合预警方法,形成一套独具特色的岩石高边坡稳定性综合预警系统。在此基础上,对左岸坝肩边坡出现的实际工程问题进行成功预警。结果表明,提出的综合预警方法可以较好地预测岩石边坡变形失稳风险,为锦屏一级水电站边坡施工期及运行期的安全预警提供了依据,也为类似岩质边坡工程稳定性预测研究提供了一条新的思路。

The stability problem of the left bank slope at Jinping-I hydropower station is very prominent.On the basis of microseismic （MS） monitoring technique,the forecasting frames,MS forecasting function and multiple information integration criteria are researched,and a safety early warning system for rock slope stability is set up.The forecasting idea for the left bank slope of Jinping-I hydropower station is built.Thus a comprehensive forecasting system of high slope stability is put forward.This system involves local forecasting based on MS monitoring,global forecasting in consideration of MS damage effect,and multiple information integration criteria.Furthermore,it is applied to the engineering problem at the left bank slope.Results suggest this comprehensive forecasting method could predict the deformation instability risk of rock slope.This research provides basis for the safety warning of the left bank slope of Jinping-I hydropower station during its construction and operation.