Abstract: 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.

Key words: High precision detonator, Ordinary detonator, Blasting vibration, Energy