Simulation of the vibrations produced during the rock excavation by different methods

摘要

The ground vibrations generated during rock excavation are always undesirable because of the damage that can be caused to building structures. This paper describes a numerical model that allows the simulation of ground vibrations due to blasting (mining), which can be transmitted over a great distance, and ground vibrations due to the use of hydraulic boom breakers (civil works) that are only important near the origin. Software for non linear dynamic analysis based on Finite Element Method is used. In the model the ground and the effect of a blasting (a very high instantaneous pressure) or a pick action (periodic load) are simulated. The calculated results are compared with real data proving that the model can reproduce the real phenomenon.