基于经验格林函数方法的爆破振动预测

通过单孔爆破振动监测实验,获取点振源的经验格林函数,利用单孔振源的格林函数来叠加合成群孔爆破振动时程。根据经验格林函数法原理建立了相应的爆破振动预测方法,编制了专用的预测分析软件。通过实例验证,若应用电子雷管精确控制起爆时差,预测目标点的群孔爆破振动波形与实测结果相当吻合。该方法获得的爆破振动预测准确度显著高于传统的回归统计分析法,不仅可以预报爆破振动峰值速度,也可对频率及持续振动时间进行预测.充分体现了爆破地震波的时频域信息,爆破振动的预测结果更全面。

Prediction of blasting vibration based on empirical Green's function method

The empirical Green's function of the point vibration source was obtained by single-hole blasting vibration test,and the velocity-time graph of group-hole blasting vibration could be predicted by composing the Green's functions of single-hole vibration sources.The method of blasting vibration prediction based on empirical Green's function method was established,and the corresponding software to predict and analyze the vibration at target locations was developed.According to experimental verification,when the delay time between initiations was accurately and precisely controlled by electronic detonators,the predicted wave of group-holes blasting vibration at the target points matched the test results.The accuracy of such prediction method was higher than the traditional regression analysis method.It could also predict the peak velocity of blasting vibration,main vibration frequency and duration of vibration.Therefore,the result of prediction was more comprehensive.