Abstract: Shock waves and gas flow caused by outburst is destructive. Firstly, we analyzed the formation process of outburst shock waves and gas flow. Then movement process of shock waves and gas flow was simulated by establishing geometrical model of the straight roadway and setting the initial conditions, and the pressure, speed of shock waves and gas flow, the relative concentration of gas distribution at different times in the roadway were obtained. Simultaneously, average pressure and speed of shock waves and gas flow at different time in roadway were analyzed. From the simulation results, some qualitative and quantitative conclusions were obtained. Lastly, experimental system for outburst shock wave was constructed; shock wave propagation at straight roadway was studied by the experimental research. The results show gas flow and shock wave with higher speed can be formed induced by outburst; Compared with initial coal seam gas pressure, the pressure of gas flow and shock wave declines sharply. The intensity of gas flow and shock wave will attenuate at straight roadway, which decays more slowly earlierly, and attenuates faster in the late.

Key words: coal and gas outburst, shock wave and gas flow, simulation, experiment