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

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