摘要
岩爆监测与预报是岩土界公认的世界性难题。锦屏二级水电站的引水隧洞的高地应力和复杂的地质结构导致了该隧洞群开挖过程中岩爆频发,对人员和设备安全造成较大的影响和潜在威胁。以锦屏二级水电站某隧洞开挖过程中强岩爆为例,介绍基于微震监测技术的岩爆预测方法。分析显示,监测系统可以采集到岩爆较为明显的前兆信息,通过人工分析处理后,可对风险区域进行较为准确的预测预报,为工程安全施工提供了重要的参考依据。
Monitoring and forecasting of rock burst is recognized as a worldwide difficulty. The water diversion tunnel of Jin- ping II Hydropower Station is characterized by high ground stress and complex geological structure, resulting in frequent rock burst during the tunnel excavation and threatening the safety of construction personnel and equipment. Taking a strong rock burst process in the water diversion tunnel excavation as an example, we present the application of micro - seismic monitoring technolo- gy in rock burst forecasting. The results show that the monitoring system can catch obvious precursor of rock burst; and after arti- ficial treating, it can forecast the risk area accurately, providing important preference to the construction safety.
出处
《人民长江》
北大核心
2012年第17期51-54,共4页
Yangtze River
关键词
开挖隧洞
岩爆预测
微震监测
锦屏二级水电站
tunnel excavation
forecasting of rock burst
micro - seismic monitoring
Jinping II Hydropower Station
