Gas Explosion Simulation Induced By Coal And Gas Outburst And Disaster Demonstration Research

Computation fluid software AutoGeaGas is used to simulate small size tube and mine actual tunnel gas explosion.Combined with theory and compution, gas emission and jet velocity rule is analysed; blast wave and flame propagation of gas explosion of actual roadway is studies, and gas explosion of different time after outburst and emission is simulation.The results show that gas emission and burst velocity is accord with power exponent rule, and the relationship of blast wave and flame propagation is according with experiment. At last, Daping coal mine "10·20" gas explosion accident induced by coal and gas outburst is simulated using roadway gas explosion model, the simulation over pressure is accord with over pressure of estimated over pressure from accident investigation. The researching results in this paper has important value for revealing coal and gas outburst and gas explosion mechanism, mine explosion suppression apparatus setting and accident investigation.