矿山微震信号到时精确拾取研究

Study on Precise Pickup of Mining Micro-Seismic Signals

基于小波包详细分析信号到时点前后的频带能量特征,得出准确到时点后的频带能量特征与原始信号的频带能量特征基本一致,吻合度最高,提出了一种拾取到时点准确性的检验方法,对信噪比低的微震信号到时拾取更加适用,大大提高了信号到时拾取的精度和效率。

Based on frequency-band energy parameter,it is obtained that the frequency-band energy characteristic of accurate first arrival point is basically consistent with the characteristics after the original signal. One test method is proposed for accuracy of before and after the first arrival point,which is more suitable for picking microseismic signal with low signal to noise ratio and greatly improves the accuracy and efficiency of picking the signal.