Abstract: The determination of the index weight has an important impact on the evaluation results of themine ventilation system. The subjective and objective joint weighting method is to comprehensively deter-mine the subjective and objective weights by using the three-scale analytic hierarchy process and the coef-ficient of variation method. lt objectively considers the variability of expert opinions and indicators , whichreflects the relative importance of each indicator, fully reflects the objective actual situation of each indi-cator. and avoids deviations in judgment results.

Key words:  mine ventilation system, subjective and objective joint empowerment, weight determination