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露天爆破振动是引发矿山边坡滑移和失稳的主要因素,从爆破地震波产生和传播的条件出发,推导了台阶爆破干扰降振中炮孔起爆延期时间的计算公式。以某矿山实测爆破地震波为例,通过小波变换获得地震波的能量时程关系,将能量峰值间隔时间和炮孔起爆延期时间进行对比分析,结果表明,台阶爆破干扰降振的延时计算公式具有较高的预报精度。研究结果对露天矿山的爆破设计具有指导意义。
The open-cast blasting vibration is the main factor that causes the slip and instability of the mine slope. Based on the conditions of the blasting seismic wave generation and propagation, the formula of the blasting detonation time of the blasting disturbance in the bench blasting is deduced. Taking the measured blasting seismic wave in a mine as an example, the energy time history of the seismic wave is obtained by wavelet transform. The peak energy interval time and blasting initiation time are comparatively analyzed. The results show that the delay formula High forecast accuracy. The research results have guiding significance for blasting design of open pit mines.