确定延时爆破间隔时间的新方法

随着城市的发展,城市爆破对振动的控制越来越严格,延时爆破是比较常用的减振手段之一。依据波的叠加原理与波的干涉,对爆破地震波的叠加效应进行理论分析,可以推导出2孔延时爆炸产生爆破地震波叠加的波动方程,得出延时爆破的最佳间隔时间;同时利用波形峰值包络线的思想与爆破地震波叠加的波动方程,拟合出了测点处质点振动速度的近似解析式;最后通过案例,利用单炮次爆破振动波形图,拟合测点处质点振动速度的表达式,根据不同延时间隔时间爆破振动的理论波形图,确定最佳的延时爆破间隔时间。

New Method for Determining the Interval Time of Delay Blasting

With the development of the city,the control of urban blasting vibration is becoming more and more strict.Delay blasting is one of the most common methods to reduce the vibration.Based on the superposition principle and the interference of wave,the superposition effect of blasting seismic wave is analyzed theoretically.The wave equation of the blasting seismic wave is generated by the two-hole delay explosion,and the optimal interval of the time of delay blasting is obtained.At the same time,by using the wave peak envelope line and the wave equation of the blasting seismic wave,the approximate analytic formula of the particle peak velocity at the measuring point is fitted.Finally,through the case,the expression of the particle peak velocity at the measuring point is fitted by the single-shot blasting vibration waveform,and according to the theoretical wave-forms of different time delay blasting vibration,the optimal delay blasting interval is determined.