Abstract：Blast vibration analysis is the foundation for studying the control of blasting vibration damage. Based on the characteristics of short-time non-stationary random signals，this paper investigates the energy distributions of blasting vibration signals by means of the wavelet packet analysis technique. In this paper，the characteristics of wavelet transform and wavelet packet analysis are briefly introduced. Then，6 sets of blasting vibration signals of multi-interval-time in millisecond blasts are analyzed by using the wavelet packet analysis technique with MATLAB. Energy distributions for different frequency bands are obtained. The results show that the wavelet packet analysis method is an effective means for studying seismic effect induced by blasting，and is especially useful for establishing the velocity-frequency criteria.
