Damping Ditch Effect Analysis of Blasting Vibration Based on Wavelet Transform

This paper researched the propagation laws of blasting seismic wave under the action of damping ditch, with the help of blasting vibration test and wavelet transform method. Blasting seismic wave is short-time non-stationary random signal. According to the time-frequency characteristics and the multi-resolution decomposition of discrete wavelet transform, the time history signal of blasting vibration was expressed by different leave reconstruction signals. The results show that, using wavelet transform method can reflect the time-frequency domain properties better than the classical method in the analysis of blasting vibration; the damping ditch has different effects in different frequency components of the vibration signal. It provided the principles of weaken vibration and lower frequency.