Study on Environmental Evaluation of Coal Mine Driving Face based on the Theory of Variable Fuzzy Recognition

In order to improve the reliability of environmental evaluation of coal mine driving face, the theory of variable fuzzy recognition was applied to environmental evaluation in working face. The common monitoring indexes of coal driving face were selected as the environmental evaluation indexes, including CH₄ volume fraction, CO volume fraction, dust mass concentration, temperature and wind speed, the weight of each index was determined by binary comparative fuzzy quantization. The variable fuzzy identification model was used to comprehensively evaluate 4 driving face samples in Xinjing Coal Mine, the evaluation result was consistent with the actual situation. The results show that the variable fuzzy recognition method can scientifically and reasonably determine the relative membership degree and relative membership function of the sample index to the standard interval of each index. The evaluation level of the sample can be multiple verified by transformation models.