Abstract
Coal mine gas disaster has the characteristic of destructive and complexity, in connection with the frequently of coal mine gas disaster, the paper studied on the propagation of gas explosion shock wave while pipe cross-sectional area changing from the experimental angle, designed the test system, the data of shock wave pressure when the pipe turning angle more or less than 90 degree was given, analyzed two situations: one was to analysis the influence of initial shock pressure effect on the attenuation coefficient under determination of pipeline turning angle; another was to analysis the influence of pipe turning angles effect on the attenuation coefficient under determination of initial shock wave overpressure, pointed out that the shock wave initial pressure and pipe turning angles were the two important factors which affect the shock wave overpressure attenuation coefficient. By comparison, the initial shock pressure had the larger influence. At last, the shock wave overpressure attenuation coefficient diversification formula was given when pipe turning angles was more or less than 90 degree.
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