关键词: 爆破震动, 微差爆破, 小波基, 能量分布

Abstract: Studying the propagation law of blasting seismic waves is very important for blasting vibration control.With Hongtoushan copper mine as the engineering background and setting measuring point of blasting vibration signal in the tunnel，blasting vibration signals in actual production were collected with vibration monitors.Based on wavelet analysis technology，and using MATLAB procedures，decomposition and reconstruction of the signal wavelet were made to select suitable wavelet for the gained signal.Then，energy distribution characteristics of millisecond blasting vibration signals were investigated.Effects of distance from blast center，total amount of explosives and propagation direction on the energy distribution law of blasting vibration signal were studied.The results showed that：With distance from blast center increasing，the low frequency portion of blasting vibration signal occupied larger percentage of total energy; When using multi-segmented millisecond blasting，the energy distributed evenly，although the total explosive increased; The energy distribution of blasting vibration signals in the back and lateral direction have some differences，and the propagation direction significantly impacts on the energy distribution of vibration signal.

Key words: Blasting vibration, Millisecond blasting, Wavelet basis, Energy distribution