土石方爆破的振动监测与分析

Vibration Monitoring and Analysis in Soil-rock Blasting

某工程的土石方开挖采用大直径深孔爆破方式。对该工程的前期爆破进行了振动监测,通过对实测数据的回归分析,得出了计算爆破质点振动速度的经验计算公式。振动监测数据表明,爆破振动持续时间与测点距爆心距离无关或关系不大,与爆破参数及测点处的地质条件有关,且爆破参数的影响最为明显。

Large-diameter longhole blasting was used to excavate soil-rock in some engineering project. The blasting vibration was monitored during primary blasting of the excavating engineering. In this paper, an empirical formula of vibration velocity is presented through the regression analysis of the measured data. The data obtained by vibration monitoring have indicated that the sustained time of blasting vibration has no or less relevance to the distance between monitoring point and blasting center, but has relevance to blasting parameters and geological condition at monitoring point, and the influence of blasting parameters is obvious.