Influence Of Different Burial Depth On Blasting Vibration

Blasting seismic wave propagation theory has always been the focus of scholars,Most blasting seismic wave theory has only taken into account the distance between the blasting center and the observation point.However,the vertical distance between the explosion center and the ground plane measurement point and buried depth impact on particle vibration has not been taken into account.Through observational data analysis,it is found that with the increase of the blast center(R),the rate of decrease of the vibration velocity of the particle decreases gradually;with the increase of the height(H)of the ground core and the ground plane particle,the law that the vibration velocity increases first and then decreases.Through the numerical calculation of the particle vibration velocity,combined with the actual observation data,the regression parameter values K,?,? were calculated and analyzed,and the attenuation law of blasting vibration in a single rock medium was obtained.The obtained formula is compared with the actual vibration measurement data and it is proved that the blasting attenuation formula obtained by the derivation process has high reliability and can be used for the prediction of the particle vibration speed in a specific blasting operation environment.According to the explosion parameters and the properties of related rocks,the single hole blasting process in the rock mass medium was simulated by ANSYS/LS-DYNA.The simulation results show that the vibration velocity of the particle decreases with the increase of the mass point and the blast center distance under the smooth rock topography.With the increase of the height difference between the blast center and the particle,the peak vibration velocity of the particle changes from increasing to decreasing.The revised Sadovsky formula can better predict the vibration speed of a specific field,and has practical value.