矿山巷道在满足运输、安全、通风等的前提下，应求得一个经济断面。但是，求得经济断面的同时，还有一个最有利的周界。对于后者，以前的书刊几乎没有涉及，而最有利的周界不但可以减少材料费用，而且通风费用也可减少，使巷道轮廓尺寸更为经济、合理。 Mine roadway to meet the transport, safety, ventilation and other premise, should obtain an economic section. However, there is one of the most advantageous perimeters when it comes to finding economic sections. In the latter case, the previous publications hardly touched upon, and the most advantageous perimeter not only reduced material costs but also reduced ventilation costs, making the laneway profile more economical and reasonable.