Parametric Analysis of the Influence of Damping Ditch on the Blasting Vibration Reduction Effect of Rock Mass
In order to reveal the effect of damping ditch on rock blasting vibration effect,a damping ditch model was established by using the finite element software ANSYS/LS-DYNA and parametric analysis was carried out to investigate the influence of the depth,length and width of the damping ditch.It is found that the damping ditch could effectively attenuate the energy of blasting seismic waves,accelerate the attenuation of blasting seismic waves by blocking and interfering the propagation of blasting seismic waves.The influence of main parameters of the damping ditch on the energy propagation of blasting seismic waves is as follows:the depth(3～5 m)>the length(1～3 m)>the width(1～2 m).In the range of 6.8 m to 8.4 m after the damping ditch,it amplifies the energy of blasting seismic wave propagation,and the location of the amplification is closely related to the depth of the damping ditch.
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