爆破地震波主频率的试验研究

Experimental Research on the Master Frequency of Blasting Seismic Wave

研究目的:振动主频率是各国爆破地震波研究工作者最关注的问题之一,它对建筑物的破坏结果有明显的影响,对其进行深入研究具有非常重要的现实意义。研究发现爆破地震波主频率的变化规律,与同段起爆的比例药量和测试点到爆区的距离两者之间的密切关系是本试验的目的。研究结论:本文根据地震波在黏弹性介质中的传播理论,提出了爆破振动频率与主要影响因素(药量和距离)之间的函数关系,并对深圳美视电厂实测爆破振动数据进行回归分析,得到了特定爆破条件下主振频率的预测公式,为爆破振动频率衰减规律的研究和对类似爆破工程进行主频率预测提供了理论和实际依据。研究发现,爆破振动主振频率f随药量Q和距离R的增大而减小。

Research purposes： The master frequency of vibration is one of the issues being paid attention to by all researchers on the blasting seismic wave because it has the obvious effect on the building damage, so it has a practical significance to do study on the blasting seismic wave. The purpose of the experimental study presented in this paper is to study the relation between the change regulation of the master frequency of blasting seismic wave and the proportional explosives for starting explosion at the same stage and the distance from the test point to the explosive area. Research conclusions：In this paper, based on the theory on the seismic wave transmitting in sticky elastic medium, the function relation between the blasting vibration frequency and main influence factors, such as explosive and distance, is put forward, the regression analysis is made for the real monitored data on the blasting vibration obtained in Shenzheng Meishi Power Plant and the prediction formula for the master frequency under the special blasting condition is obtained. These can be as the practical and theoretical basis for studying the attenuation regulation of blasting vibration frequency and for prediction of the master frequency of the similar blasting. The study finds the master frequency of the blasting vibration decreases with the increases of the explosive and distance.