Evaluation and analysis of mine roadway safety risk based on unascertained measure theory
The safety of mine roadway is one of the important guarantees to ensure mine excavation and coal mining,so its safety risk as-sessment is also an indispensable key link in the process of project development.Previous evaluation methods often rely more on subjec-tive qualitative analysis,lack of quantitative and the consideration of the primary and secondary relationship between various influencing factors.Based on this,starting from the four aspects of man-machine loop,17 key influencing factors were selected and the unascertained measurement theory was used to scientifically establish the safety evaluation system of mine roadway.The entropy weight method was used to calculate the weights of each influencing factor,and then the results were scientifically judged according to the confidence level recognition criteria,and the importance of the results was finally ranked.The safety risk assessment method of mine roadway based on unascertained measure theory was constructed.Combined with the analysis of engineering examples,the results show that the evaluation method is objective and comprehensive,can accurately identify the key factors affecting the safety state of the roadway,and is basically consistent with the actual engineering situation,which proves that the method has high accuracy and practical application value,and can be used for the comprehensive safety evaluation of the mine roadway under similar conditions.
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