在矿井通风参考文献[1、2]中介绍了确定矿井巷道空气动力阻力系数的方程式,它们初看起来似乎不好对比,且难以相互比较(表1)。公式中的共同基本参数是:巷道的横截面积S,巷道周长P和壁面粗糙凸出物的绝对值k。按下式计算相对粗糙度: n=k/r=kP/(2S) (1) 式中:r——巷道水力半径。文献中有些列出的计算空气动力阻力系数α的方程式是用相对粗糙度表示并将它列入相同的分母中(见表1)。将获得的方程 The equation for determining the aerodynamic drag coefficient of mine roadway is introduced in Mine Ventilation Reference [1, 2], which at first glance appears to be poorly matched and difficult to compare with each other (Table 1). The common basic parameters in the formula are: the cross-sectional area S of the roadway, the perimeter of the roadway P, and the absolute value k of the rough bump on the wall. Calculate the relative roughness as follows: n = k / r = kP / (2S) (1) Where: r - tunnel hydraulic radius. Some of the equations listed in the literature for calculating the aerodynamic drag coefficient α are expressed in terms of relative roughness and included in the same denominator (see Table 1). The equation will be obtained