HHT Analysis of Height Influence on Blasting Vibration Parameters under Rocky Slope

Through Hilbert-Huang transform analysis of signals from different height of the rocky slope, law and amplification cause of peak particle velocity and frequency spectrum of blasting seismic wave in three directions were studied. On basis of energy damage mechanism, damage analysis of rocky slope under blast load from view of momentary input energy shows that total input energy and the maximum momentary input energy are dominant in horizontal radial direction of 56m height, followed by horizontal direction of 32m height and vertical components in low height range of the slope.