Catastrophe Progression Method for Coal and Gas Outburst Risk Comprehensive Evaluation

A new evaluation method combined catastrophe theory and fuzzy mathematics was established to evaluate the coal and gas outburst risk, and the feasibility and effectiveness of the method is verified by an example. The method first established coal and gas outburst comprehensive evaluation index system, evaluation sets and membership functions, and carries out normalization processing with the expert scoring methods. Then the normalized recursive formula is used to calculate the total value of membership function mutation matrix and the evaluation results.