An Analysis of the Effects of Gas Explosion on the Stability of an Underground Excavation

초록

With the increase of the utilization of underground space in worldwide, explosion accidents at the underground facilities such as gas pipes have occurred frequently. In urban area with high population density, individual explosion accidents are likely to spread into large complex accidents. It is necessary to investigate the effect of explosion on the stability of underground structures in urban area. In this study, AUTODYN was used to analyze the impact on the stability of underground structures. As a result, TNT buried underground explosion, the rock is rapidly collapsing, and as the rock is destroyed, it shows a complex stress pattern. In addition, at 50 ms, tensile stress is generated due to the reflection of the tunnel, and at 100 ms, residual stress is generated after explosion wave propagation.