针对Fourier变换的时频局限性和小波分析的基函数选择困难问题，采用HHT对某铜矿切割槽爆破震动信号进行分析。首先对原始信号进行EMD-小波强制法去噪处理，再对干净信号进行 EMD分解和Hilbert变换，结果显示：信号能量分布在0.1~2.8 s，表明爆破震动维持在这段时间，其中0.4~1.4 s能量最大，是爆破药量最大的时段；IMF1~IMF4分量携带了94.8702豫的信号能量，是造成爆破震动危害的优势分量；IMF5、IMF6分量携带的能量虽然只有1.7375豫，但其频率与建（构）筑物频率接近，易产生共振，造成建（构）筑物爆破震动破坏。基于上述分析结果，采用HHT法对切割槽爆破延时进行研究，准确识别了12个段别雷管及其延时时间，证明HHT法可用于微差爆破延时识别。%Aimed at the problem of time-frequency limitation in Fourier transform and selecting mother wavelet in wavelet transform,the blasting vibration signal of cutting slot in copper mine was analyzed with HHT. Firstly,the EMD-wavelet force method was used to depress the original signal noise,then the EMD decomposition and Hilbert transformation were done to process the clear signal. The results show the signal energy distributed between 0. 1 s and 2. 8 s,meaning blasting vibration in this period,among which signal energy between 0. 4 s and 1. 4 s,the energy was the largest,meanwhile the explosive amount was the largest. 94. 8702% signal energy distributed in IMF1 ~IMF4 components was the leading damage from blasting vibration. Although only 1. 7375% signal energy in IMF5 and IMF6,the frequency was similar to structure,which damaged the structure by resonance easily. Based on the results of signal analysis,the delay time of cutting slot blasting was discussed with HHT method. The HHT method success-fully identified 12 delays detonators and the delay in blasting engineering.
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