Research on risk factor evaluation of coal mine roof accident under the coupling effect

Based on the interaction and coupling effect of human factors, equipment factors, environmental factors and management factors, the N-K model was used to quantify the coupling effect of risk factors of coal mine roof accident, the weighted intuitionistic fuzzy set decision matrix was established, and by combining TOPSIS model, the evaluation model of risk factors of coal mine roof accident was constructed. Through the analysis of 185 typical coal mine roof accidents occurred from 2008 to 2018 in China, it is concluded that subjective human factors or management factors are the more active factors in the risk of coal mine roof accidents, the subjective factors coupling with objective factors are liable to cause coal mine roof accidents, and human factors are more critical than management factors.