基于小波变换的爆破地震信号能量分析法的应用研究

根据爆破地震信号具有持时短、突变快等特点，结合工程爆破地震监测资料，利用小波包良好的时频局部化性质对爆破地震信号的能量分布特征进行了分析，研究了爆破地震信号的能量在传播过程中的变化规律，得到了爆破地震信号不同频带上的能量分布。根据爆破地震信号不同频带的特征频率与受控建筑物自振频率之间的关系，确定爆破地震对建筑物的影响。并用工程实例说明了该方法比用单一强度因子作为爆破地震的安全判据更加有效。

Application research of the energy analysis method for blasting seismic signals based on wavelet transform

By the characteristics of short-duration and abrupt for blasting seismic signals and the monitoring data from a blasting engineering,we analyze the features of energy distribution for blasting seismic signals,study the laws of energy change for blast seismic signals during the spread,and obtain the energy distribution of blasting seismic signals on different frequency bands by means of the wavelet packet analysis,which has high resolvability and localization.According to the connection between characteristic frequency on different frequency bands of blasting seismic signals and natural frequency of controlled structures,it can confirm if blasting seism plays a role on the structures.An engineering example proves that this method is more effective than the safety-judging standard of single intensity factor for blasting seism.