Influence of explosion parameters on energy distribution of blasting vibration signal based on wavelet packet energy spectrum

According to the characteristics of short-time, non-stationary random signals, the wavelet packet energy spectra for the measured blasting vibration signals were investigated by using the wavelet packet analysis. These blasting vibration signals were produced in case of the different explosion parameters such as the distance of the measuring point from the blasting center, the maximum sectional explosive mass and the millisecond-delay detonator number. The energy distributions at the different frequency bands for the blasting vibration signals were obtained. The energy distribution characteristics of the blasting vibration signals measured under the different explosion parameters were analyzed. Considering the blasting vibration signal energy, the attenuation laws of the blasting seismic waves corresponding to the different explosion parameters were explored. Our results indicate that the wavelet packet analysis method is effective to study blasting seismic effects.