某钨矿微震事件定位精度分析

摘要

Due to frequent underground stress activities and deficiencies of the traditional monitoring methods on underground stress, the Micro-seismic Monitoring System invented by South Africa Institute of Mine Seismology, was applied to monitor the stress activities, in particular, those large disasters caused by stress activities in a Tungsten mine of Jiangxi. This paper mainly expounds the space lay out design of the system ,discusses the positioning accuracy of the artificial fixed point blasting and the positional precise problem of the practical procedure, The different between them should be noticed in actual operation. The paper also suggests that improve the positional accuracy from the system architecture layout and the system maintenance. Then analyses the causes for the positioning inaccuracy, finally make a conclusion that the elastic caused from micro seismic is different from the seismic wave caused from explosion.%鉴于复杂的矿区地质情况，频繁的地压活动以及传统地压监测手段的不足，江西某钨矿引进南非矿震研究院微震监测系统，对整个矿区地压活动进行监测。重点阐述了该系统的空间布局设计、人工定点爆破的定位精度确定以及运行过程中的定位精度问题，并对运行中定位失准产生的原因进行了分析，认为微震事件产生的弹性波有别于爆破产生的地震波，两者的区别应在实际工作中引起注意。文章从系统架构布局和系统后期维护这两方面提出了提高定位精度的建议。