基于样条插值的爆破振动时域波形预测方法

针对现有的爆破振动预测方法存在工程现场适用性差,不易于应用,无法准确预测完整的爆破振动信号在爆破时间段内的振动历程等问题,提出了一种基于样条插值的爆破振动预测方法。通过爆破中质点峰值速度、炸药量与爆心距的关系式,建立监测波形与预测波形的关系,对实测数据波形时域部分进行三次样条插值得到插值函数和预测目标点波形。通过实验和工程实践对该方法进行验证,并与传统的爆破振动预测方法进行质点峰值速度比对,结果表明:该爆破振动预测方法能够完整且较好地预测振动信号在爆破时间段内的振动历程,预测效果优于传统的爆破振动预测方法。

A predicting method for time domain waveform of blasting vibration based on spline interpolation

Many methods of the blasting vibration prediction had weakness like lack of feasibility for different kinds of ground,not easy in practical application,and could not get a whole accurate waveform of blasting vibration during the blasting time.This paper put forward a blasting vibration prediction method based on spline interpolation.The relationship between waveform monitored and predicted was built through the relation of peak particle velocity,explosive and blasting distance.The interpolation ruction and predicted target point waveform were got in time domain after spline interpolation three times.The proposed method was verified by an experiment and project practice and compared with the peak particle velocity in other traditional methods.It demonstrated that this method could better achieve the whole accurate waveform of blasting vibration.