矿山通风井巷断面大小对矿井安全生产的重要作用是十分明显的,但它对矿山经济效益的重要影响却往往为人们所忽视。长时间以来,确定井巷断面的程序只是根据运输设备尺寸以及安全规程的有关规定预选井巷断面;尔后,验算井巷通过风速,符合规程要求即可,超过允许最高风速则增加井巷的断面积。其结果是,我国矿山主要通风井巷断面普遍偏小,压力分布极不合理。多数矿山主要通风井巷的阻力损失占全矿的60%左右,有少数矿山甚至高达90%以上。如某铅锌矿主要通风井巷阻力损失1.03kPa, Mine ventilation shaft section size of the mine safety production of the important role is very obvious, but it has an important impact on the economic benefits of mining is often overlooked. For a long time, the procedure for determining the cross section of a roadway is to preselect well sections according to the dimensions of the transport equipment and the relevant safety regulations. Afterwards, the tunnel passes through the wind speed and meets the requirements of the code, and if the maximum allowable wind speed is exceeded, area. As a result, the main mine shaft mine roadway section is generally small, the pressure distribution is extremely unreasonable. Most of the major mine ventilation shaft resistance loss accounts for about 60% of the mine, a few mines even as high as 90%. If a lead-zinc mine ventilation shaft drag loss of 1.03kPa,