Research on Location Method of Mine Micro-Seismic Source Based on Inter Quartile Range and Newton-Raphson Method

In order to improve the accuracy of microseismic localization, avoid the error concentration phenomenon in the inversion model of the optimization class algorithm, and improve the robustness of microseismic source localization, a microseismic source localization method based on robust analysis is proposed. The four-four combination localization model is established, and the approximate solution results of the seismic source are obtained by solving with Newton iteration method; the IQR robust value determination criterion and three-component weighted center of gravity method are introduced to gradually eliminate the outliers of class I and class II in the preliminary results, and finally the final seismic source optimization results are obtained according to the IQR triple-mean value method. Through the blasting data test of a mine, the three-component positioning errors of the optimized seismic source are 2.70 m, 0.54 m and 6.80 m, and the absolute spatial distance is 7.34 m. This method is simple, and the positioning accuracy is better than that of the simplex positioning method and the four-four combination positioning method optimized by K-Means.