爆破地震波传播过程中的多普勒效应研究

为研究爆破施工中毫秒延时爆破作用的频谱特性，采用理论推导和数值模拟相结合的方法进行分析与计算。利用模态识别方法对炮孔间隔时间为25 ms的延时爆破振动数据进行频谱特性分析，得到爆源左、右两侧的爆破振动频率分别约为35 Hz和45 Hz的整数倍。进一步分析可得，这是由于爆破地震波在传播过程中发生多普勒效应,导致不同方向上的频率发生偏移，使得爆源两侧的爆破振动频率值存在差异。据此，实际爆破施工中可以利用多普勒效应进行爆破振动频率的调控。

Doppler Effect in Propagation of Blasting Seismic Wave

In order to study the spectrum characteristics of millisecond delay blasting in blasting construction, theoretical derivation and numerical simulation were combined to analyze and calculate. Modal identification method was used to analyze the frequency spectrum characteristics of the time-delay blasting vibration data with the time interval of 25 ms and the blasting vibration frequency on the left and right sides of the blasting source is about an integer multiple of 35 Hz and 45 Hz, respectively. Further analysis shows that it is due to Doppler effect of blasting seismic wave in the propagation process, which causes the frequency deviation in different directions, resulting in the difference of blasting vibration frequency values on both sides of the blasting source. Therefore, Doppler effect can be used to control the blasting vibration frequency.