爆破振动主频衰减机制和衰减规律研究

The prediction of the dominant frequency of blast induced seismic is one of the key problems in the field of impact evaluation and control of blasting vibration, it involves in two important issues including source mechanism of rock blasting and attenuation law of the dominant frequency of blasting vibration. In this project, We firstly study the source mechanism of rock blasting with spherical charge and analyze the spectrum of blast induced seismic wave, through dimensional analysis and numerical simulation, then try to propose a prediction formula for the dominant frequency of spherically seismic wave. On the basis of the calculation of blast vibration induced by cylindrical charge in the time domain and correspondingly analysis of the spectrum characteristics, and combining with the feedback analysis of monitored dominant frequency of vibration induced by different blasting types and parameters,we try to establish a way to predict the dominant frequency of drill and blast induced vibration, which can not only embodies the source mechanism of rock blasting, but also takes into account the combined influences of scaled distance, source geometry and sonic parameters of rock mass. The work is expected to be a technical support of the evaluation and control of blasting vibration.

爆破地震波传播过程中的振动主频预报是爆破振动影响评价和控制领域亟待解决的关键问题之一，涉及岩石爆破激发地震波的爆源机制和爆破振动主频衰减规律等基本科学问题。本项目基于球形药包激发地震波的爆源机制研究及其频谱特征分析，通过量纲分析和数值试验，提出球面爆破地震波振动主频衰减公式；基于岩石钻孔爆破激发地震波的时域叠加计算及其振动频谱特性分析，结合不同爆破方式和爆破参数条件下爆破振动主监测频数据的反馈分析，建立一套体现爆源机制、反映比例距离、爆源几何特征（药包直径和装药长度）和岩体波动参数综合影响的钻孔爆破振动主频预报方法，为岩石爆破振动影响评价和控制提供技术支撑。

爆破地震波传播过程中的振动主频预报是爆破振动影响评价和控制领域中亟待解决的关键问题之一，涉及岩石爆破激发地震波的爆源机制和爆破振动主频衰减规律等基本科学问题。本项目基于球形药包激发地震波的爆源机制研究及其频谱特征分析，通过量纲分析和数值试验，提出了球面爆破地震波振动主频衰减公式；基于岩石钻孔爆破激发地震波的时域叠加计算及其振动频谱特性分析，结合不同爆破方式和爆破参数条件下爆破振动主监测频数据的反馈分析，建立了一套体现爆源机制、反映比例距离、爆源几何特征（药包直径和装药长度）和岩体波动参数综合影响的钻孔爆破振动主频预报方法。结合项目研究，发表SCI和EI收录论文22篇，授权和受理发明专利各3件，培养硕博士生10人，主持获得省级技术发明一等奖1项，相关成果可为岩石爆破振动影响评价和控制提供技术支撑。