大岗山水电站地下厂房微震监测系统的设计与实现

Design and realization of microseismicity monitoring system for underground powerhouse of Dagangshan Hydropower Station

针对四川大岗山水电站地下厂房开挖施工过程中顶拱发生塌方且塌方区存在安全隐患问题,设计并安装了南非ISS公司微震监测系统以弥补常规监测手段的不足,即:利用上层排水廊道地理优势,基于通信方案为最大传输距离可达7 km的DSL,采用32位的模数转换精度数据采集器GS在环绕塌方区共设计布置8支14 Hz智能全向检波器,实现真正的远程控制与实时监测,其数据处理功能强大,对数据解释与理论研究非常有利。配合通信系统和网络,该系统适当扩展就可以满足大型工程微震监测智能系统要求,并可望对类似工程微震监测系统的设计与选择提供一定的参考。

In accordance with the crown collapse of the underground powerhouse of Dagangshan Hydropower Station in Sichuan Province during the excavation and the hidden safety troubles from the collapsed area, the ISS mieroseismicity monitoring system from South Africa is designed and installed therein for making up the defects from the conventional monitoring measures; i. e. eight 14 Hz amplitude detectors are arranged around the collapsed area with the geographic advantage of the upper drainage gallery located therein based on the data acquisition unit （ GS ） with 32-bit analog-to-digital converting precision and the DSL communication scheme with the maximum distance of 7 km, and then the remote-control and real-time monitoring are realized with a powerful function of data processing, which is quite favorable to the data interpretation and theoretical study concerned. If working together with the relevant communication system and network, not only the requirement from the intelligent system of microseismicity monitoring for large scale project can be met with an adaptable enlargement, but a certain reference can also be expected to provide for the design and selection of the microseismicity monitoring system for the similar project concerned.