矿井在多风井运转通风期间，各风井之间往往存在扰动，影响矿井的通风安全。本文以多风井联合运转矿井的通风系统为例，根据安全系统工程原理和系统评价相关理论，结合多风机联合运转通风系统的特点，建立了多风井联合运转通风系统评价指标体系，采用层次分析法计算了各评价指标权重，通过专家打分法确定了评价因素的隶属度，最后针对矿井多风井联合运转通风系统的安全性，采用模糊综合评价法给出了定性评判。以长平煤业为例，根据所构建的评价指标体系，计算指标权重后，采用模糊综合评判对矿井通风系统安全性进行了评价，结果表明，该矿在多风机联合运转下，其通风系统安全等级为“中等”，真实反映了矿井通风系统的安全性，为矿井的安全生产奠定基础。

 During the operation and ventilation of multiple air shafts in the mine, there are often disturbances between the air shafts, which in turn affects the ventilation safety of the mine. In this paper, taking the ventilation system of multi-air shaft combined operation mine as an example, according to the principle of safety system engineering and the theory of system evaluation, combined with the characteristics of multi-fan combined operation ventilation system, the evaluation index system of multi-air shaft combined operation ventilation system is established. The weight of each evaluation index is calculated by analytic hierarchy process, and the membership degree of evaluation factors is determined by expert scoring method. Finally, aiming at the safety of multi-air shaft combined operation ventilation system in mine, the qualitative evaluation is given by fuzzy comprehensive evaluation method. Taking Changping Coal Industry as an example, according to the constructed evaluation index system, the index weight is calculated, and the safety of the mine ventilation system is evaluated by fuzzy comprehensive evaluation. The results show that the safety level of the mine ventilation system is ' medium ' under the joint operation of multiple fans, which truly reflects the safety of the mine ventilation system and lays a foundation for the safe production of the mine.