为了解决矿井通风系统巷道重要度不能客观确定、重点巷道不能准确定位的问题,基于通风网络复杂特征、图论理论并引入供水管网中节点和管段级联失效重要度确定方法,从井巷结构与功能两方面对巷道重要度进行双重分析。选取节点的度中心性、介数中心性和紧密中心性3个参数,计算巷道节点与风路分支的结构重要度;通过矿井通风仿真模型中某条巷道密闭级联失效对其余巷道风量影响程度确定密闭巷道的功能重要度。综合巷道的结构与功能重要度,建立矿井通风系统巷道重要度评估模型。以余吾煤矿北翼通风系统为例,使用Ucinet软件计算出北翼各节点的中心度指标值和风路结构重要度,在北翼矿井Ventsim通风模型中进行巷道级联失效影响性评估,确定巷道的功能重要度。综合通风网络中巷道的拓扑结构和级联失效影响对其重要度进行评估,得出北翼通风系统中各条巷道的综合重要度大小。依据巷道风流类型对巷道的综合重要度进行排序,在余吾煤矿北翼矿井通风系统中,进、回风立井综合重要度>回风巷综合重要度>工作面综合重要度>进风巷综合重要度。以北翼巷道综合重要度为权重,对通风模型准确性进行评估,对比分析其与传统评估模型的区别。研究成果可为矿井通风系统中重点巷道识别、矿井通风模型准确性评估、矿井风量监测和通风系统优化设计提供可靠依据。

Given the problem that the importance of the roadway in the mine ventilation system cannot be objectively determined, the study analyses the importance from structure and function based on the complex characteristics of the ventilation network. The three parameters of degree centrality, betweenness centrality and closeness centrality are selected to calculate the structural importance of road- way nodes and branches. The functional importance is determined by the degree of influence of the air- tight cascading failure of the roadway on the air volume of the remaining roadways in the ventilation model. Integrated the importance of structure and function of roadway, an evaluation model of roadway importance of mine ventilation system is established. Taken the ventilation system of the north wing of Yuwu Coal Mine as an example, the topological structure of roadway in the comprehensive ventilationnetwork and the influence of cascading failure are evaluated for its importance degree, and the impor- tance of each roadway in the ventilation system of the north wing is derived. The comprehensive impor- tance of the roadway is sorted out according to the type of wind flow in the roadway, and the compre- hensive importance of the ventilation subvertical, ventilation fan> the comprehensive importance of the return airway> the comprehensive importance of the working face> the comprehensive importance of the intake airflow roadway is obtained. The accuracy of the ventilation model is evaluated with the weight of the comprehensive importance of the northern roadway, and the difference of the model are compared and analyzed with the traditional evaluation model. This research provides a reliable basis for the identifi- cation of key roadways in the mine ventilation system, the reliability assessment of the mine ventilation model, the monitoring of the mine air volume and the optimal design of the ventilation system.