那板水库引水隧洞塌方灾害微震监测与预警

Landslide and micro-seismic monitoring and alarm of diversion tunnel of Naban Reservoir

针对那板水库引水隧洞开挖过程中存在发生塌方地质灾害的安全隐患问题,采用微震技术追踪引水隧洞开挖过程中的围岩破裂过程,论述了塌方微震监测与预警的技术要点。工程实践表明,微震监测与预警技术是可行的,是浅埋隧洞Ⅳ、Ⅴ类围岩塌方灾害监测与预警的有效手段。

There exists geological disaster risk such as landslide in the course of diversion tunnel excavation of Naban Reservoir Project.In view of this risk,micro-seismic monitoring technology was adopted to trace the surrounding rock crack process during excavation.The authors discuss the technical key points of landslide micro-seismic monitoring and alarm.Engineering practice demonstrate the technology of micro-seismic monitoring and alarm is feasible,and is the effective means of landslide monitoring and alarm for shallow tunnel accommodated in surrounding rock of IV-class and V-class.