甘肃某地下铁矿通风系统现状分析与优化

甘肃某地下铁矿经过多年的开采，通风网路破坏严重，风量调节困难。目前矿山开采至+2 670 m水平时，Ⅰ矿体+2 715 m回风巷已发生不同程度的破坏，随着开采水平的继续下降，Ⅰ矿体回风系统将完全被破坏。再加上+2 760 m水平Ⅱ矿体回风平巷因受岩石移动的影响而产生破坏，导致通风系统不能适应生产的需求，严重制约矿山的安全生产及经济效益。结合当前矿山通风现状及科学的现场数据测量，分析其通风系统存在的主要问题，提出优化改造方案并进行通风网路解算。优化改造方案立足于矿山现有设施设备，结合矿山扩大生产规模和增加开采深度的要求，同时充分考虑深部通风方案与现有通风方案的衔接，达到了预期效果，为矿山安全通风提供科学依据。

Current Situation Analysis and Optimization of the Ventilation System on an Underground Iron Mine in Gansu Province

After years of mining in the underground iron mine in Gansu province,ventilation network has been damaged,resulting in difficulties of air volume adjustment.At present,the mine has been mined to +2 670 m level,and the returning airway at Ⅰ ore-body has been damaged in different degrees in +2 715 m level.As the mining levels continue to decline,Ⅰ orebody returning air system will be completely destroyed.In the same time,returning airway at Ⅱ ore-body in +2 760 m level has been damaged due to the influence of rock movement,which causes the ventilation system can't meet the requirement of production and seriously influences to the safety production and economic benefit.Based on the current status of mine ventilation and scientific field data measurement,the main existing problems of the ventilation system are analyzed and the optimization reform scheme is proposed as well as the ventilation networks are solved.The optimization reform scheme is based on the mining of existing facilities and equipment,and combined with the expansion of mining scale and the deep mining plan.At the same time,the connection of deep and existing ventilation plans is fully considered,which realizes the expected results and offers scientific basis of mining safe ventilation.