南疆吐库二线中天山隧道全长22.449 km，进口端采用TBM施工，计划施工长度13.8 km，长距离施工通风是影响施工进度和经济效益的重要因素。针对中天山隧道的施工方法、掘进长度、施工组织等实际情况，进行长距离施工通风方案研究，通过对比长距离独头通风方案和巷道式联合通风方案，确定巷道式联合通风方案为最优方案，并给出巷道式联合通风阶段的划分以及风机数量。通过现场测试通风方案实施情况，进一步调整通风方案，不断适应现场实际施工情况，为中天山隧道的安全顺利贯通提供了通风保障。

Zhongtianshan tunnel is 22.449 km long. The 13.8 km entrance section of the tunnel is driven by TBM. Longdistance ventilation during tunneling is one of the important factors that affect the construction progress and economic efficiency. Study is made on the ventilation of Zhongtianshan tunnel on basis of the construction method, driving length and construction organization of the tunnel. Comparison and contrast is made between singledirection longdistance ventilation program and gallerytype combined ventilation program, which indicates that the gallerytype combined ventilation program is the optimum ventilation program. The stage division and number of the ventilation fans needed for the gallerytype combined ventilation program are proposed. The ventilation program is further adjusted during tunneling in accordance with the site ventilation monitoring results so as to meet the actual conditions of the site. In the end, the ventilation program adopted guarantees the successful breakthrough of Zhongtianshan tunnel.