基于无需测速的单纯形法微地震定位改进研究  

IMPROVEMENT OF MICROSEISM LOCATING BASED ON SIMPLEX METHOD WITHOUT VELOCITY MEASURING

作　　者：李健[1,2,3] 高永涛[1,2] 谢玉玲[1,2] 周喻[1,2] 杨凯[1,2] 

机构地区：[1]北京科技大学土木与环境工程学院,北京100083 [2]北京科技大学金属矿山高效开采与安全教育部重点实验室,北京100083 [3]西澳大利亚大学土木与能源工程学院

出　　处：《岩石力学与工程学报》2014年第7期1336-1346,共11页Chinese Journal of Rock Mechanics and Engineering

基　　金：长江学者和创新团队发展计划资助项目(IRT0950);2012年国家建设高水平大学公派研究生项目

摘　　要：在综合分析传统单纯形法及目前微地震定位算法选用的各类速度模型及其相关误差的基础上,提出一种无需测速和反演的速度模型,并基于此对传统单纯形法进行微地震定位改进研究,结合不同速度模型、不同迭代算法在差异化速度误差和速度各向异性变化条件下的定位精度进行算例分析和工程验证,研究结果表明:无需测速和反演的速度模型能有效避免传统速度反演模型在速度反演过程中的方法误差和现场测速造成的测速误差,将其应用于传统单纯形法,不仅能有效避免传统单纯形法易陷入局部最优的问题,充分发挥单纯形法迭代易收敛的优势,且对于检波器阵列外的震源进行定位时相比其他迭代方法求解时定位精度显著提高,可为微地震定位领域提供一种新的研究思路。A new type of velocity model without the velocity inversion and velocity measuring was put torwarct for the improvement of the traditional simplex method based on the comprehensive analysis of the traditional simplex method, the velocity models and the related errors of the microseism locating method. Numerical analysis and engineering validation on the precision of locating under the conditions of different velocity models, different iteration algorithms with velocity errors and velocity anisotropy were carried out. The results show that the new velocity model can effectively avoid the errors happened in the process of velocity inversion and measuring and avoid the problem of local minimum in traditional simplex method. In comparison with the other iterative methods, significantly higher accuracy of locating the seismic sources outside the sensor arrays is achieved, taking advantage of the easy convergence of iterations of the simplex method.

关 键 词：采矿工程 定位精度 速度模型 微地震 单纯形法 

分 类 号：TD164[矿业工程—矿山地质测量]