较大高程差迎波坡面爆破地震地形效应分析

Blasting seismic topographic effects of follow-wave slope with higher differential elevation

针对较大高程差起伏地形高边坡爆破施工对周边环境的影响,开展了迎波坡面爆破地震地形效应研究。通过爆破振动测试与分析,得到了迎波坡面质点峰值振动速度萨氏经验公式。结合高程放大效应质点峰值振动速度经验公式,推导出了基于地形效应迎波坡面爆破地震预测模型,通过依托工程迎波坡面质点峰值振动速度预测分析,表明预测模型能较好地反映出地形效应对爆破地震的影响;同时,研究指出由于爆破地震波传播路径与介质的复杂性以及波传播过程中的叠加干涉,对较大高程差起伏地形的质点峰值振速预测,以总药量参与计算更为精准。

In view of the impact of blasting construction on the surrounding environment of the high slope in the undulating terrain with high differential elevation,the analysis of the blasting seismic topographic effects on the follow-wave slope is carried out.Through the test and analysis of blasting vibration,the Sadovs empirical formula of the particle peak velocity on the follow-wave slope is obtained.Combined with the empirical formula of the particle peak velocity based on the elevation amplification effect,the blasting seismic prediction models based on the topographic effects is proposed.By relying on the prediction and analysis of the particle peak velocity on the follow-wave slope,the impact of the topographic effects on the blasting seismic can be better reflected.At the same time,it is pointed out that because of the complexity of the propagation path and medium of blasting seismic wave and the superposition interference in the process of wave propagation,it is more accurate to predict the particle peak velocity in the undulating terrain with higher differential elevation condition by taking the total charge into account.