Abstract: The processing technology of blasting vibration signals has been an important subject in current blasting vibration study field. Based on the monitoring of blasting vibration of an open pit mine, blasting vibration signals were analyzed by using Hilbert-Huang transform(HHT). Signals were decomposed into several IMF components which contain different components through EMD, Hilbert transform was done on each component, then drew the graphics of signal spectra, instantaneous energy, contour energy and so on in order to get the characteristics of time-frequency and energy distribution of the vibration signals.

Key words: Millisecond blasting, Vibration signals analysis, HHT, Signal character