用小波变换识别微差爆破中的实际延迟时间

Using Wavelet Transform to Identify Practical Time of Delay in Millisecond Blasting

在微差爆破工程中,由于延期微差时间往往与实际延期时间有较大出入,影响了微差爆破的效果和顺利实施.基于这一现状,利用小波变换具有突出被分析信号局部特征的能力,通过分析爆破工程中所监测到的振动信号.有效地识别出微差爆破中各段雷管的起爆时刻,进而可以确定爆破中所用雷管的实际延期时间.以某地下矿山进行的微差爆破监测到的爆破振动信号进行小波分析为例,验证了此方法的有效性.图3,表3,参7.

In millisecond blasting engineering, the designed or selected time of delay is always different from the practical time of delay due to the delay errors of plain detonators, and influences the effect and successful implementation. Based on the actuality, the proposed method in this paper makes use of wavelet transform with the ability to stand out the localization character, identifies effectually the blasting moment of short-delay detonators by analyzing the monitoring signals in millisecond blasting engineering, and ascertains the practical time of delay. The effectiveness of the proposed method is verified with wavelet analyzing of millisecond blasting vibration signal in a underground mine.3figs.,2tabs.,7refs.