雷管延期误差对地震波叠加降振的概率分析

基于不同距离处测点的实测单孔波形,以1 ms等间隔双段叠加方法得到了叠加信号振速幅值随距离的变化情况,并确定了各测点最优微差时间。在考虑雷管延期误差的基础上,建立概率模型定量分析了延期误差对地震波干扰降振的影响。结果表明:近距离测点,低段位雷管的降振概率较大,远距离测点,高段位雷管的降振概率较大;此外,低段位雷管的降振概率受测点距离影响较大,高段位雷管所受影响较小。在实际爆破设计中,可根据不同测点处所允许的最大振速,对爆源处的雷管段别进行优化选取,为爆破设计提供有益的参考依据。

Probability analysis for influence of time-delay error of detonators on superposed seismic wave vibration reduction

Based on measured single-hole waveforms at points with different distances,vibration velocity amplitude variations of superposed signals with variation of distance were obtained by using the method of 1ms equal interval double-segment superposition,and the optimal delay time at each measured point was determined.Considering time-delay error of detonators,a probability model was established to quantitatively analyze influence of time-delay error of detonators on seismic wave interference vibration reduction.The results showed that at the measured point with near distance,low segment location detonator has a larger vibration reduction probability,while at the measured point with far distance,high segment location detonator has a larger vibration reduction probability;the distance of the measured point more largely affects the vibration reduction probability of low segment location detonator,but it affects that of high segment location detonator less;in the actual blasting design,the detonator segment number at the blast source can be chosen optimally according to the allowable maximum vibration velocity at different measured points to provide a useful reference for the blasting design.