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平型关隧道全长6190m,为直线隧道,坡度3～5‰,两洞口高差24.4m。在低洞口端设有帘幕与风道吹吸式50A_4-11 NO22轴流风机两台并联作业,叶片角25°,电机功率每台70kW,通风量160m~3/s。帘幕为双扇左右平移式钢结构,由0.6kW电机通过钢丝绳传动。帘幕信号为遮断式,与车站联锁。该隧道铺设整体道床,洞内排水不良,相对湿度为82～100％。通过隧道的列车由东风4型(4000hp)内燃机车单机牵引,上坡载重960吨,下坡为1600吨,车速约35km/h,行车密度13对/日。1982年4月,太原铁路局对平型关隧道采用帘幕吹入式机械通风(列车上坡车尾进洞0.5分钟关帘幕
The Pingguanguan tunnel is 6190m in length and is a straight tunnel with a slope of 3 ~ 5 ‰ with a height difference of 24.4m. In the lower end of the hole with curtains and duct blowing suction 50A_4-11 NO22 axial fan two parallel operations, blade angle 25 °, the motor power of each 70kW, ventilation 160m ~ 3 / s. The curtain is double-leaf left and right translational steel structure, driven by 0.6kW motor through wire rope. Curtain signal is blocking type, and the station interlock. The tunnel laying the overall roadbed, poor drainage holes, the relative humidity of 82 ~ 100%. Trains passing through the tunnel were towed by a single machine of Dongfeng 4-type (4000hp) diesel locomotive. The load was 960 tons uphill and 1,600 tons downhill with a speed of about 35km / h and traffic density of 13 pairs / day. In April 1982, Taiyuan Railway Bureau adopted curtain-type mechanical ventilation to Pingxingguan Tunnel