NUMERICAL SIMULATION OF THE STARTING POSITION OF GROUND VIBRATION IN SHORT DELAY BLASTS

In this axticle numerical simulation is conducted with ANSYS / LS- DYNA3D software for ground vibration of single hole and double holes in rock near the source in bench blast. The results show that sustaining duration of particle vibration becomes longer; with the increased distance, and the interval of the moments between the first and second blast waves becomes,shorter' So the starting position of delay blast superposition can be determined by a numerical simulation.