Abstract: Abstract:Based on the theory of three class of hazard, the dangerous hazards of coal mine gas explosion accident are analyzed and the risk evaluation index system of the dangerous hazard is constructed. With comparison of four commonly used scales, using the consistent scaling of 9/9-9/1, the judgment matrix is structured by the analytic hierarchy process, and every index weight value is determined accurately using the MATLAB. With the comparison of the weight of all indexes, the important factors of gas explosion accidents and their mutual relations are concluded, which provide the reliable theoretical basis for the prevention and control of mine production in the process of the accident.

Key words: Keywords: analytic hierarchy process (AHP), gas explosion, hazard, risk evaluation