Abstract:

Coal-mine gas explosion accidents are of the most serious losses in all kinds of coal mine accidents, so the dangerous source of the gas explosion accidents were analyzed with the fault tree in order to build the accident chains based on the mechanism of gas explosion accidents in this study. The uncertainty and the different importance of dangerous source in the process of gas explosion accident were studied by using the fuzzy fault tree, and the importance degree of base case was obtained by using the median method when analyzing the calculation methods of fuzzy importance degree. Finally, an actual example verified the feasibility and scientificallness of risk pre-control of coal-mine gas explosion accidents based on the fuzzy fault tree, and then a new idea for the timely and accurate coal-mine gas explosion accidents early warning was put forward.

Key words: coal-mine gas explosion accidents, fuzzy fault tree, hazards, fuzzy probability, fuzzy importance degree