高精度雷管爆破振动信号特征比较分析

结合普通雷管和高精度雷管爆破振动监测实验数据，采用小波包分析提取爆破振动信号能量分布特征，对比分析和研究了高精度雷管与普通雷管振动信号在频带分布、不同频带能量方面的特征。结果表明使用高精度雷管实施爆破有助于降低爆破振动。高精度雷管振动信号频带分布较窄，90%以上的能量集中于0~100 Hz，低频带能量占据比重较大，在0~50 Hz内的能量约占总能量的75%~90%。要注意在0~4 Hz内的能量对周围建构筑物的影响，而不能仅仅靠振动速度来判断爆破振动对建构筑物的影响。

Comparative Analysis of Blasting Vibration Signal Characteristics between High Precision Detonator and Ordinary Detonator

Based on the experimental data of blasting vibration from ordinary detonators and high precision detonators, the wavelet packet analysis is adopted to extract the energy distribution features of blasting vibration signal. The frequency distribution, different band energy features of high precision detonators and ordinary detonator vibration signal are contrasted and studied. The results show that the high accuracy detonators can reduce blasting vibration. The vibration signal of high precision detonators are narrow in frequency distribution, and more than 90 percent of all energy focuses on 0~100 Hz. Low frequency energy occupies about 75%~90% of the total energy in 0~50 Hz. Attention on the effect of energy in 0~4 Hz on the buildings should be paid, and vibration speed can not be considered as a only way to determine the impact of blasting vibration on building structures.