通风网络解算初始风量确定方法

矿井通风网络解算前,各分支风量的初值直接影向网络解算的速度和迭代是否收敛.分析了影响通风网络各分支风量分配的3个因素:网络拓扑结构、矿井总风量和分支本身的风阻;提出了确定通风网络解算初始风量的新思路,把通风网络的独立通路当作并联通风路线,利用矿井总风量和通路风阻计算各通路的风量,再分到每个分支中.通过一个网络图示例说明了使用该思路提出的方法,给出了通风网络解算初值与网络解算真值的误差,除角联分支外都不超过20％.

Method of determining initial air volumes in ventilation network solution

The flow initial values of Branches in ventilation network before mine ventilation network flow distribution directly affects the iterative convergence and its speed. This paper analyzes three factors that influence the airflow distribution of each branch in ventilation network: network topological structure, mine total air volume and airflow branch wind drag. The new idea determining the flow values of Branches is proposed in ventilation network flow distribution: taking independent pathways of ventilation network as parallel vent lines, calculating each pathway air volume by using mine total air volume and pathway wind drags, and allotting them to each branch. Using the proposed method by a network diagram in the paper, except diagonal branches, the errors between the given initial values and the true values are not more than 20%.