大型机械化金属矿山通风系统优化

为了改善大型无轨机械化矿山井下通风效果，分析了无轨设备运行时的需风量，并与工作面最小排尘风速、井下同时工作的最多人数需风量相比对，确定了井下最少供风量；基于Vensim通风软件构建了井下通风网络图，并对风流路径、风机参数、构筑物进行动态调节，使无轨设备相对集中的地方得到更多的风量，从而达到井下通风系统优化的目的。对贵州某大型无轨机械化矿山通风效果研究结果表明：无轨设备需风量最大，以此风量作为井下最少供风量；结合Vensim通风网络图，确定通风机与风构筑物的位置，并调节风门开度与风机转速，对风流路径与风量进行动态优化；采用刚性风筒大大降低通风阻力。通过这几方面的优化成功改善了井下大型机械化金属矿山通风效果。

Optimization of Ventilation System in Large-scale Mechanized Metal Mine

In order to improve the underground ventilation effect in the large-scale trackless mechanized mine,the air volume required by trackless equipment in running was analyzed.Compared with the minimum dusting air speed in working face,and the air volume as maximum personals working at the same time,the minimum underground air-supply volume was determined; Ventilation network graph for underground mine was constructed based on Vensim software,and the wind flow path,fan parameters and structures were dynamically adjusted to realize more air volume for more trackless equipment,so as to achieve the purpose of optimizing the mine ventilation system.The ventilation effect in a large-scale trackless mechanized mine in Guizhou showed that the trackless equipment needs most of air volume,which are considered as the minimum ventilation volume of underground mine; In combination with Vensim ventilation network diagram,the positions of the fan and the structures were determined,and the air door opening and fan speed were dynamically adjusted to optimize the wind flow path and air volume; The rigid duct can greatly reduce the ventilation resistance.The optimization from several aspects above can improve ventilation effect of the large mechanized underground metal mine.