风网解算下的多级机站设置与风机优选研究

为解决龙桥铁矿总风量不足、漏风严重、通风设备选型及布局不合理等问题，利用Ventsim三维可视化风网解算软件建立了主—辅扇和多级机站通风网络模型，并根据解算结果优化多级机站风机选型。风网解算结果表明：①当主—辅扇通风系统工频（50 Hz）运行总风量为364.94 m3/s，多级机站通风系统风机频率为48 Hz时总风量为364.36 m3/s，系统总风量均达到设计风量，但多级机站通风系统总风量富余，优于主—辅扇通风系统；②多级机站通风系统设4级机站，Ⅰ级为总进风机站，Ⅱ级为采场进风机站，Ⅲ级为采场回风机站，Ⅳ级总回风机站，优化后的Ⅰ级总进风机站选用两台K40-8-№23型风机并联，Ⅲ级回风机站东区选用两台K40-8-№21型风机并联，西区选用两台K40-8-№23型风机并联。所设计的通风方案满足该矿-420 m中段和-490 m中段风量分配要求。

Study on Multi-level Station Setting and Auxiliary Fan Optimization under Wind Network Solution

In order to solve the problems of insufficient total air volume,serious air leakage and unreasonable ventilation equipment selection and layout in Longqiao Iron Mine,the ventilation network models of main auxiliary fan and multi-stage fan station are established by using Ventsim three-dimensional visual air network solution software,and the fan selection of multi-stage fan station is optimized according to the solution results.The analysis of the air network calculation results show that:① When the total air volume of the main auxiliary fan ventilation system at full frequency (50 Hz) is 364.94 m3/s and the fan frequency of the multi-stage fan station ventilation system is 48 Hz,the total air volume of the system reaches the design air volume,but the total air volume of the multi-stage fan station ventilation system is surplus,which is better than the main auxiliary fan ventilation system.② The ventilation system of multi-level fan station is set with 4-level fan stations.Level Ⅰ is the main inlet fan station,level Ⅱ is the stope inlet fan station,level Ⅲ is the stope return fan station,and level Ⅳ is the main return fan station.The optimized level Ⅰ main inlet fan station adopts two k40-8-№ 23 fans in parallel,level Ⅲ return fan station adopts two k40-8-№ 21 fans in parallel in the East and two k40-8-№ 23 fans in parallel in the West.The scheme meets the air volume distribution requirements of -420 m middle section and -490 m middle section of the mine.