Numerical simulation for propagation characteristics of outburst shock wave and gas flow when outburst prevention facilities fail

In order to numerical simulate the propagation law and counter current of outbursts gas flow when outburst prevention facilities fails, the propagation characteristics model of outburst shock wave and gas flow was established, and the mechanism of gas adverse current was analyzed. The propagation and counter of shock wave and gas flow at two types of geometry model were numerically simulated using Fluent software. The results show that the most of gas flow produced by outburst propagate to intake airway when crossheading with excavation roadway at the same level; however, when crossheading with the excavation roadway where outburst may occur is not at the same level, gas is mainly discharged from the return airway, and intake airway affected by the gas flow is small. The results have important theoretical and practical significance for mine disaster rescue and preventing secondary accidents.