基于层状波速模型的矿山微震定位方法  

Mine Microseismic Location Method Based on Layered Wave Velocity Model

作　　者：蒋元建 王李管[1] 彭平安[1] 涂思羽 何正祥 JIANG Yuanjian;WANG Liguan;PENG Pingan;TU Siyu;HE Zhengxiang(School of Resource and Security Engineering,Central South University,Changsha 410083,China)

机构地区：[1]中南大学资源与安全工程学院

出　　处：《有色金属工程》2019年第12期96-105,共10页Nonferrous Metals Engineering

基　　金：国家重点研发计划项目（2017YFC0602905）;中南大学研究生科研创新项目（2018zzts725）~~

摘　　要：针对矿山微震定位精度不高的问题,提出采用层状波速模型来代替传统均匀波速模型。采用试射法射线追踪技术来计算微震波在介质中的传播路径,在此基础上,研究了层状波速模型中Geiger定位方法,提出了层状波速模型中Geiger法精确定位的算法流程。通过MATLAB编程,实现了该定位算法,并且数值测试了该定位算法的准确性。数值测试结果表明:不考虑噪声影响到时拾取精度的情况下,新算法的定位精度在1m以内;考虑噪声影响的情况下,新算法的定位误差为9.3m,而采用传统均匀波速模型的定位误差达到28.71m,远远大于新算法的误差。最后,将新算法应用在冬瓜山铜矿,通过对16个微震事件的定位分析,新算法的定位效果优于传统的定位方法,事件位置更加集中。Aiming at the problem of low accuracy of microseismic location in mine,the idea of using layered wave velocity model to replace the traditional uniform wave velocity model is proposed.The shooting method was used to calculate the propagation path of the microseismic wave in the medium.On this basis,the Geiger localization method in the layered wave velocity model was studied,and the algorithm flow for the accurate location of the Geiger method in the layered wave velocity model was proposed.By MATLAB programming,the localization algorithm is realized,and the accuracy of the localization algorithm is numerically tested.The numerical test results show that,without considering the influence of noise,the location accuracy of the new algorithm is within 1 m.Considering the influence of noise,the location error of the new algorithm is 9.3 m,and the traditional uniform wave velocity model is adopted.The location error reaches 28.71 m,which is far greater than that of the new algorithm.Finally,the new algorithm is applied to Dongguashan copper mine.Through the location analysis of 16 microseismic events,the location effect of the new algorithm is better than the traditional location method,and the location of events is more concentrated.

关 键 词：层状波速模型 射线追踪 Geiger定位 数值测试 冬瓜山铜矿 

分 类 号：TD326[矿业工程—矿井建设] P631.4[天文地球—地质矿产勘探]