Abstract
As one of the common wave types, the cylindrical wave induced by engineering blasting will cause ground vibration when propagates to the ground surface. Accurately obtaining the propagation characteristics of wave in jointed rock mass and its induced ground motion is the basis for analysing the deformation and failure mechanism and safety of rock mass slope and cavern under dynamic load. In view of the lack of research on cylindrical wave propagation, the study presents a numerical simulation of the ground motion caused by cylindrical P-wave propagation across jointed rock mass with different distribution characteristics by UDEC. Firstly, studies on the ground motion caused by cylindrical wave in a special case are conducted. Compared with the theoretical results, it is proved that UDEC is an effective method to simulate ground motion. Then, the ground vibration caused by cylindrical wave propagation across a rock mass with a set of joints is simulated and the parametric studies are carried out to investigate the influence of the joint distribution on the peak particle velocities (PPV) of the ground motions. Finally, the influence of the number of rock joint groups on the vibration is analysed by simulating the case of multiple groups of joints.
Published Version
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