Abstract
In order to highlight the safety of mine ventilation system on the whole, based on the various uncertain information the relevant factors that affect the safety of the ventilation system in the mine were selected to determine the evaluation system of mine ventilation. Firstly, based on the Unascertained Measure Theory and the uncertain information in mine ventilation system evaluation system, the AHP method was used to determine the weight of each index. Secondly, the unascertained measure vector of each evaluation index was calculated, and the unascertained measure function vector model was set up. Finally, according to the credible degree recognition results, the evaluation level of the ventilation system was determined. This model was applied to a lead-zinc mine's ventilation system and the study shows that the safety level decided by the evaluation result is general. That is in accordance with the actual situation in the field.