Influence of maximum decking charge on intensity of blasting vibration^①

来源期刊：中南大学学报(英文版)2006年第3期

论文作者：凌同华 李夕兵

文章页码：286 - 289

Key words：maximum decking charge; blasting vibration; non-stationary random signal; wavelet packet analysis

Abstract: Based on the character of short-time non-stationary random signal, the relationship between the maximum decking charge and energy distribution of blasting vibration signals was investigated by means of the wavelet packet method. Firstly, the characteristics of wavelet transform and wavelet packet analysis were described. Secondly, the blasting vibration signals were analyzed by wavelet packet based on software MATLAB, and the change of energy distribution curve at different frequency bands were obtained. Finally, the law of energy distribution of blasting vibration signals changing with the maximum decking charge was analyzed. The results show that with the increase of decking charge, the ratio of the energy of high frequency to total energy decreases, the dominant frequency bands of blasting vibration signals tend towards low frequency and blasting vibration does not depend on the maximum decking charge.

基金信息：the National Natural Science Foundation of China