A Method for Micro-seismic Source Location Based on Principal Component Analysis and Spatial Discrete Detection

In view of the large errors and complex models associated with conventional microseismic source localization, a simple and effective micro-seismic location method is proposed. Based on the analysis results of the direct solution of the four-four combination positioning method, the spatial distribution characteristic parameters of the source scattered points closely related to the positioning error are extracted: the spatial weighted centroid distance, the number of adjacent points in space, the adjacent distance sum, etc., and the analysis model of the source dispersion degree is established. The above characteristic parameters of the source spatial distribution are extracted by the principal component analysis method, and the comprehensive evaluation and ranking results of the source dispersion degree are obtained; the final result is obtained by the centroid method. The engineering data shows that the final three-component positioning errors of the source are 6.255 m, 4.552 m, and 2.010 m, respectively, and the spatial distance is 7.993 m. The method is simple and effective, and has certain practical application significance.