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通过从不同角度对大量的深孔爆破地震动测试数据的分析 ,得到了岩石中爆破地震波传播的频率、幅值和持续时间等主要参数的变化规律以及它们的影响因素 ,并通过二元回归法 ,拟合出计算爆破地震波加速度幅值的经验公式。在此基础上 ,建立了爆破地震波传播过程的计算模型 ,编制了有限元计算程序。数值模拟仅考虑弹性区域 ,爆炸波对岩石介质的作用经粉碎区、破裂区衰减后成为输入荷载。计算结果与实测结果基本相符 ,证明该模型与方法可用于一般岩石介质中爆破地震波传播的数值模拟。研究结果为深孔爆破地震控制措施的制订提供了依据 ,对其它类似问题的研究也有一定的参考作用
Through the analysis of a large number of deep hole blasting ground motion test data from different angles, the variation rules of the main parameters such as frequency, amplitude and duration of blasting seismic waves in rock are obtained and their influencing factors are obtained. By binary regression , Fitting the empirical formula for calculating the amplitude of blasting seismic wave acceleration. On this basis, the computational model of blasting seismic wave propagation is established, and the finite element program is developed. The numerical simulation only considers the elastic region. The effect of the blast wave on the rock medium is attenuated by the crushing zone and the rupture zone and becomes the input load. The calculated results are in good agreement with the measured results, which proves that the model and method can be applied to the numerical simulation of blasting seismic wave propagation in rock media. The results provide a basis for the formulation of deep-hole blasting seismic control measures, and have some reference to the study of other similar problems