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本文讨论的矿井复杂通风网路图解法,其基本原理是:将矿井通风阻力定律之数学表达式 h=RQ~2等价地写成 h=XQ,而 X=RQ。从而引入了中间变量 X,这里 X 与风量 Q 是线性关系。任一风路的 X 与 Q 的关系在 XOQ 坐标系中是直线关系即为斜率为 R 的一条直线,图解时使 R 直线通过 Q 点,则直线在 X 轴上截得的值 X=RQ。风路的风压值即为 R 直线截两坐标轴所得之值的积 h=XQ。然后再结合风量、风压平衡定律建立解算步骤,就形成了这种图解法。此法与其他图解法相比。因是在常用直角坐标系中利用直线进行解算,不存在做半函数坐标或风阻 R 特性曲线之麻烦事,故有简单、易于掌握运用的特点。而且对任何复杂的通风网路都能进行解算,解算精度不次于其它方法。但此法在图解过程中,存在着需做一定的计算之缺点,这些计算借助于电子计算器进行,可提高解算速度。1981年,利用这种图解法与计算法对平顶山矿务局一矿通风网路进行了分析解算,解算速度与精度都是比较理想的。由于这种图解法使用的是普通直角坐标系,且风阻特性曲线在图解中为一直线,因此对于不常迂到而又需对某通风网路进行解算的工程技术人员,尤其显得优越。因此,它作为一种图解矿井复杂通风网路的方法,进行交流,是有一定意义的。
The basic theory of mine complex ventilation network scheme discussed in this paper is that the mathematical expression h = RQ ~ 2 of mine ventilation resistance law is equivalently written as h = XQ and X = RQ. Thus introducing the intermediate variable X, where X is linear with the air flow Q. The relationship between X and Q of any wind path is a straight line in the XOQ coordinate system, which is a straight line with a slope of R. When plotting the straight line of R through Q point, the value of the straight line on X axis is X = RQ. The wind pressure value is the product of the straight line R and the value h = XQ. Then combined with the wind, wind pressure balance law to establish the solution steps, formed this graphic method. This method compared with other graphic method. Because in the commonly used rectangular coordinate system using the straight line to solve, there is no trouble doing semi-function coordinates or wind resistance R characteristic curve, it is simple, easy to grasp the use of features. And for any complex ventilation network can be solved, solving accuracy not inferior to other methods. However, this method in the graphic process, there is the need to do some calculation of shortcomings, these calculations with the help of electronic calculators, can improve the speed of solution. In 1981, using this graphical method and calculation method of Pingdingshan Mining Bureau a mine ventilation network analysis and resolution, the solution speed and accuracy are ideal. Since this diagram uses an ordinary Cartesian coordinate system and the windage characteristic curves are straight lines in the illustration, it is particularly advantageous for engineers who are not routine enough to solve a ventilation network. Therefore, it is of some significance as a way to illustrate mine complex ventilation networks.