Three-dimensional propagation model building in heterogeneous medium of mine earthquake shock wave and its application.

In order to study the influence of velocity model on the deviation of shock bump earthquake location, three dimensional propagation model of mine quake waves in the layered inhomogeneous media was built based on Huygens principle. Through blasting vibration tests, monitoring was made by microseismic system of mine. The three-dimensional wave equation was built for seismic waves forward, and propagation velocity's calculation formula on the dielectric interface was also given, on which the classical linear positioning method was reasonably improved so that the linear positioning method based on uniform medium suits for inhomogeneous medium. The actual calculation for shock bump can be made through the application of deduction results to mine microseismic monitoring and positioning system. The results show that velocity model greatly affects positioning. By using 3D propagation model in the shock bump positioning, location accuracy is effectively improve. [ABSTRACT FROM AUTHOR]