关键词: 预裂爆破, 预裂缝, 爆破振动信号, 连续小波变换, 主震频带

Abstract: The data of pre-splitting blasting experiment and measured blasting vibration are used to analyze the change features of the blasting vibration signals of both sides of pre-splitting fissure from frequency domain at the basis of Pre-splitting blasting theory.The power spectrum and scale energy figure of blasting vibration signals of both sides of pre-splitting fissure are obtained by adopting the Fourier transform and continuous wavelet transform.According to the contrast results,the main frequency bands of high frequency component of the blasting vibration signals become wider,while the energy of low frequency component of the blasting vibration signals is attenuated sharply,besides that,the main frequency bands tend to develop to the high frequency component.

Key words: Pre-splitting blasting, Pre-splitting fissure, Blasting vibration signals, Continuous wavelet transform, Main frequency bands