某大阻力深井矿山通风系统安全问题诊断及优化设计

Safety Problems Diagnosis and Optimization Design of Ventilation System in a Deep Mine with Large Resistance

针对某地下矿山存在的倒段风井多、通风线路长、各生产中段风量不合理等问题,通过对通风网络、机站及风机进行优化,对通风方案进行优化,并提出改造措施。通过数值模拟,对方案的可行性进行验证。结果表明:采用三级回风机站串联接力方式共同承担系统阻力,可有效解决深部风量欠缺问题,采区风量可调可控;为解决深部风量不足与通风阻力过高的问题,需要扩刷-370~-520 m水平回风井,井筒净直径为3.5 m;优化后矿井总风量104.37 m^(3)/s,较设计风量富余4.37%,各主要生产中段风量分配合理,满足井下采、掘、充以及各项生产作业需要。

Aiming at the problems of many inverted air shafts,long ventilation lines and unreasonable air volume in each production section in an underground mine,the ventilation network,machine station and fan are optimized,the ventilation scheme is optimized,and the transformation measures are put forward.Through numerical simulation,the feasibility of the scheme is verified.The results show that the three-stage return fan station series relay method is used to jointly bear the system resistance,which can effectively solve the problem of lack of deep air volume,and the air volume in the mining area is adjustable and control⁃lable.In order to solve the problem of insufficient deep air volume and high ventilation resistance,it is neces⁃sary to expand the-370~-520 m horizontal return air shaft with a net diameter of 3.5 m.After optimization,the total air volume of the mine is 104.37 m^(3)/s,which is 4.37%more than the designed air volume.The air volume distribution of each main production section is reasonable,which meets the needs of underground mining,excavation,filling and various production operations.