无论在设计新矿井或改建旧矿井的通风系统时,都会遇到有关全矿各巷道的风量自然分配的计算问题。由于矿井通风网路计算本身的复杂性,目前对于复杂的矿井通风网,国内外普遍认为只能用分析试算法或电力模拟法进行解算。但是,前者计算太复杂,后者受到设备的限制还不能普遍采用。图解法具有计算简单、在图上分析问题比较形象、清楚的优点。但是过去人们在研究用图解法解算矿井通风网路时,都局限在等风压或等风量条件下进行曲线的合成,故只能解算串联和并朕的简单通风网,使图解法的应用也受到很大限制。国外许多学者亦曾经尝试用图解法来解算 Whether in the design of new mines or revamp of ventilation systems in old mines, there are computational problems associated with the natural distribution of air flow across the roadway. Due to the complexity of mine ventilation network calculation itself, at present, it is generally accepted that only analytical test methods or power simulation methods can be used to solve complex mine ventilation networks. However, the former is too complicated to calculate, while the latter is not universally applicable due to equipment limitations. Graphical method has the advantages of simple calculation, comparative analysis of image on the graph and clearness. However, in the past, when studying the mine ventilation network by graphic method, it was limited to the synthesis of curves under the condition of equal air pressure or equal air volume. Therefore, only the simple ventilation net in series and parallel can be solved, Applications are also greatly limited. Many foreign scholars have also tried to use graphic method to solve