不同炸药爆破振动信号能量分布特征的提升小波包分析

Research on the Distribution Characteristics of Blasting Seismic Wave Energy for Different Explosives Based on the Lifting Wavelet Packet Analysis

为研究不同炸药对爆破地震波信号能量分布特征的影响,通过提升小波包变换,对现场测试的乳化炸药、TNT、RDX等三种不同炸药的地震波信号各频带能量进行了定量分析。研究表明:通过提升小波包变换分析,得到了不同炸药爆源的地震波信号能量的三维时频分布特征,以及各频带能量大小及所处时刻和所占信号总能量的比例值;不同距离地震波信号能量值,TNT和RDX装药都比乳化炸药更大,但随着距离的增大,总能量值越来越接近;其中爆破振动信号大部分能量集中在10~80 Hz的频段,且该频段范围内的能量百分比,乳化炸药比TNT和RDX装药更高。In order to study different explosives effect on the energy distribution characteristics of blasting vibration signals, the lifting wavelet packet algorithm was used to analyze the seismic wave signals of emulsified explosive, TNT and RDX at different distances tested in the field. The results show that the three-dimensional time-frequency distribution characteristics of seismic wave signal energy of different explosive sources are obtained through the lifting wavelet packet transform analysis, and the energy size of each frequency band, the time and the proportion of the total energy of the signal are obtained. The energy values of TNT and RDX are larger than those of emulsion explosive at different distances, but with the increase of distance, the total energy values are closer and closer. Among them, the energy percentage in the 10~80 Hz band is higher for emulsified explosive than TNT and RDX charge.