An explosion point positioning method based on seismic waveform cross-correlation imaging

Abstract

Accurate explosion point positioning is an indispensable key link in modern range testing. This study proposed an explosion point positioning method based on seismic waveform cross-correlation imaging and constructed an imaging function using the squared product of Pearson correlation coefficients. The positioning method makes full use of the waveform information of multi-channel seismic waves, and realizes the precise positioning of the explosion point according to the imaging energy value. To verify the anti-noise performance of the imaging function, the Ricker wavelet was used to construct multi-channel synthetic waveform data. Compared to conventional imaging functions, the proposed imaging function demonstrates significant advantages in background noise suppression. In addition, the propagation process of seismic waves in a typical explosion environment was simulated by finite element simulation. Based on the simulation data, the propagation law of explosion seismic wave was analyzed, and the feasibility of the positioning method was verified. To further evaluate the actual performance of the method, the explosion seismic wave test system was built, and single-point explosion and multi-point explosion tests were carried out. The test results showed that the positioning error of this method is less than 0.3 m in the range of 40 m × 40 m, and the high-precision positioning of the explosion point can be realized. This study provides a new technical idea for the location of explosion point.