Abstract: Coal mine gas explosion is a complex process which is influenced by many factors together. Based on the mechanism and characteristics of coal mine gas explosion accident, the relationship between all influence factors was analyzed by using entropy method. By integrating the subjective and objective factors, confirming the weighing of all influence factors, fuzzy comprehensive coal gas explosion risk evaluation model on the basis of entropy weight was established. The evaluation was done on gas explosion risk of one mine, and the result was consistent with practical situation, had a certain practical using value.

Key words: Entropy weight, Risk evaluation, Gas explosion, Fuzzy evaluation