Abstract:The terrain around the blasting spot is not usually flat. The height difference exists between the blasting spot and the protected target. Plenty of blasting vibration signal is collected with engineering practice. The amplification effect of peak of blasting seismic wave under positive height difference is verified, which exists in a certain range. The frequency spectrum characteristics, time-frequency characteristics and energy distribution of the blasting vibration signal under height difference are analyzed with the methods of wavelet packets. The blasting vibration signal under positive height difference contain more low-frequency component, the energy of low-frequency component tend to increase, which is hazardous for the protected target around the blasting spot. Through analyzing the law of propagation of blasting seismic wave under height difference, the blasting design can be optimized and the target around blasting spot can be protected better, which has important practical significance.
李兴华;龙源;纪冲;钟明寿;路亮. 基于小波包变换的高程差对爆破震动信号影响分析[J]. , 2013, 32(4): 44-47.
LI Xing-hua;LONG Yuan;JI Chong;ZHONG Ming-shou;LU Liang. Analysis on the blasting vibration signal on the influence of height difference based on the wavelet packets transform. , 2013, 32(4): 44-47.