Study on coal dust explosion risk assessment in coal mine based on combination weighting-set pair analysis

Aiming at the problem that there are few studies on coal dust explosion hazard assessment and the selection of evaluation factors is quite different at present, through analyzing the characteristics of coal dust explosion, the paper puts forward that the three necessary conditions of coal dust explosion hazard, coal dust explosion concentration hazard and ignition source hazard are the first-level indexes, and 14 secondary indexes such as coal quality variation degree, volatile matter, moisture content and ash content are determined by analytic hierarchy process.Subjective weight, the objective weight of each index is determined by the method of entropy weight, the combination weight of each index is calculated by the method of multiplication normalization, and the set pair analysis-combination weighting coal dust explosion risk assessment model is constructed.The model is applied to a mine in Jining together with the mature improved FAHP model, the fuzzy fault tree model, the grey clustering evaluation system and the unascertained measure evaluation model.In the process of coal dust explosion hazard assessment in the mine, the results show that the evaluation results of set pair analysis-combination weighting evaluation model, improved FAHP model and grey clustering evaluation system are general hazard grade, and the evaluation results of fuzzy fault tree model are relatively safe grade.The evaluation results of set pair analysis-combination weighting coal dust explosion hazard assessment model and improved FAHP model, grey clustering evaluation body are set pair analysis-combination weighting coal dust explosion hazard assessment model.The evaluation results of the system and the unascertained measurement evaluation model are consistent, and the model has good applicability to the evaluation of coal dust explosion risk.