物探化探计算技术2025，Vol.47Issue(2)：149-158,10.DOI:10.12474/wthtjs.20231110-0003
一种基于偏振约束的P波时差震源定位方法
A method of P-wave observed and theoretical travel time differences source location based on polarization constraint
赵祥云 1李辉1
作者信息
- 1. 成都理工大学地球物理学院,成都 610059
- 折叠
摘要
Abstract
Microseismic source location is one of the most important problems in microseismic monitoring technology.using only the P-wave time difference to calculate the source location may cause asignificant error due to multiple solutions.To improve the location accuracy and reduce the multiple solutions,a P-wave source location method based on polarization constraints is proposed.In this paper,the source azimuth and incidence angle are obtained according to the polarization characteristics of the P-wave,and then the P-wave time difference is constrained by the calculated polarization parameters to construct the objective function.Finally,particle swarm optimization is used to solve the objective function for location.The test results on the theoretical model show that the proposed method can greatly reduce the problem of multiple solutions,and the average location error after polarization constraint is reduced from 78.5m to 0.77m.The test results in the actual work area that meet the conditions of the proposed method also show that the proposed method is an effective method for locating microseismic sources.Moreover,the proposed method only needs five geophones to get the location error within 1m.关键词
震源定位/偏振约束/射线追踪/初至拾取/粒子群算法Key words
source location/polarization-constrained/ray tracing/first-arrival picking/particle swarm optimization分类
地质学引用本文复制引用
赵祥云,李辉..一种基于偏振约束的P波时差震源定位方法[J].物探化探计算技术,2025,47(2):149-158,10.
