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以兖矿集团万福煤矿主立井掘进工程为背景,提出了新的井筒爆破振动监测方法。并在阐述固有时间尺度分解(ITD,Intrinsic Time-Scale Decomposition)分解和小波信号抑制理论基础上,对采集到的爆破振动信号进行了雷管微差识别。结果表明:组合方法能够精确识别出立井掘进中雷管实际起爆时刻,获取各段别雷管实际微差延时间隔。同时,提高低段别雷管精度并适当延长其起爆时差很大程度上可以防止振动波的叠加。
Based on the main shaft excavation project of Wanfu Coal Mine in Yanzhou Mining Group, a new monitoring method of borehole blasting vibration is proposed. On the basis of expatiating the decomposition of Intrinsic Time-Scale Decomposition (ITD) and the theory of suppressing wavelet signals, the collected blasting vibration signals are distinguished by the differential of detonators. The results show that the combination method can accurately identify the detonator detonation actual detonation time, get the actual detonation delay interval of each segment. At the same time, to improve the accuracy of low-level detonators and extend the detonation time to a great extent can prevent the superposition of vibration waves.