未知波速系统中声发射与微震震源三维解析综合定位方法及工程应用

发布时间：2018-01-19 16:23

本文关键词： 岩石力学三维解析定位方法声发射微震震源未知波速系统　出处：《岩石力学与工程学报》2017年01期 　论文类型：期刊论文

【摘要】：目前常用的声发射与微震震源定位方法存在的问题有:定位精度严重依赖于迭代算法、迭代初值和预先测定的波速值;已有的解析定位方法因含有平方根亦存在解不唯一的问题。为解决以上两大方面的定位难题,建立了未知波速系统的三维微震或声发射震源定位的控制方程,求得该系统下的解析解,该解析解在传感器数量N=6时,可以确定唯一的微震或声发射震源坐标,求解方程亦为线性方程,解唯一,与已有的三维定位的解析解相比,其优势在于坐标值计算没有平方根运算,没有虚根,解唯一。当传感器数量大于6时,提出了基于解析解与Log-logistic概率密度函数的综合定位方法。对建立的三维解析综合定位方法用冬瓜山矿爆破试验进行验证,结果表明,定位精度较高。通过与已有方法比较分析发现,三维解析综合定位方法比传统方法的定位结果精度高,综合定位方法的优势在于不需要迭代求解,计算公式简单,物理意义明确,不受波速和迭代算法的影响,较传统方法TT(无需测速到时法)和TD(无需测速到时差法)更具有工程实际应用价值。
[Abstract]:At present, the problems of acoustic emission and microseismic focal location methods are as follows: location accuracy depends heavily on iterative algorithm, iterative initial values and pre-measured wave velocities; The existing analytical localization methods have the problem of not only solving the problem of square root, but also the problem of solution. In order to solve the above two problems, the governing equations of 3-D microseismic or acoustic emission source location of unknown wave velocity system are established. The analytical solution under the system is obtained. The analytical solution can determine the unique focal coordinates of microearthquakes or acoustic emission at the number of sensors N = 6:00, and the solution equation is also linear equation, and the solution is unique. Compared with the existing analytical solution of 3D positioning, the advantage of the method is that the coordinate value calculation has no square root operation, no virtual root, and the solution is unique, when the number of sensors is more than 6:00. An integrated localization method based on analytic solution and Log-logistic probability density function is proposed. The results show that the method is verified by blasting test in Dongguashan Mine. Comparing with the existing methods, it is found that the 3D analytical integrated positioning method has higher accuracy than the traditional method, and the advantage of the integrated positioning method is that it does not need to be solved iteratively. The calculation formula is simple, the physical meaning is clear, and is not affected by wave velocity and iterative algorithm. Compared with the traditional methods TTand TD (no velocity to moveout method), it has more practical application value in engineering.
【作者单位】：中南大学资源与安全工程学院;山东黄金集团有限公司焦家金矿;
【基金】：国家自然科学基金资助项目(51504288,41272304) 国家重点基础研究发展计划(973)项目(2015CB060200)~~
【分类号】：TU45
【正文快照】： 系统的波速值是未知或者难以准确测量到的,以上1引言2个问题给定位系统带来了很大的定位误差,甚至疏忽掉了本来存在的真实声发射源或微震震源。利用时差的定位方法被广泛应用于航空、海洋、为解决以上2个问题,研究随机监测网络下三结构检测、导航、工业过程、人或动物声音源定

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