ABSTRACT
The paper presents the results of an investigation that was carried out in order to analyze the stability of tunnels due to shock loads. The dynamic behavior of the tunnels due to shock loads were investigated using finite element method in which LUSAS 3-D finite element code was utilized. The structural behaviors of all models were non linear elasto plastic. With this respect the effect of depth and geomechanical parameters are studied. The tunnels were modeled using three different depths and rock types namely soft, medium and hard rocks. The results of static, pseudo-static and dynamic analysis show that tunnels under shock loads are more unstable at lower depth than those of higher depth.
