RESEARCH ON FILTERING METHOD OF MINE MICROSEISMIC SIGNALS BASED ON WAVELET TRANSFORM

Based on the multi-scale analysing idea of wavelet transform,pointing at the character that the mine microseimic signals have wide frequency bands and abundant spectrum compositions.This paper presents a filtering method for signal and noise in different freiuency scope,using this method,we can separate the noise from the signal and decompose the signals which have different fiequency bands in order to filter the signals.The results of experiment show that the wavelet transform method can get rid of the noise in the microseismic signals and it can be applied to the pre-processing of microseimic signals effectively.