Abstract: In order to improve the validity of the refuge chamber and reduce the damage from the gas explosion,the horizontal cylindrical mobile refuge chamber for coal mine was taken as the research object.By using numerical method,the explosion process of 9.5% gas was analyzed.And the variation tendency of the overpressure and the temperature at the shell's end was obtained.The analysis results showed that the pressure load suffered by the refuge chamber's shell can be considered as the combined load including the step load and the sine load,and the temperature load can be considered as the step load.