某超高海拔多金属矿复杂通风系统优化技术研究

Study on Optimization Technology of Complex Ventilation System in a Super-high Altitude Polymetallic Mine

高海拔矿井通风普遍存在系统复杂、设备效率低和效果差等问题。通过理论分析、现场实测和三维仿真模拟解算等技术方法,对某超高海拔多金属矿复杂通风系统进行了优化研究,根据采掘作业计划核算了矿井需风量和风量分配。针对现场实测中发现的总风量不足、主通风机效率偏低、各中段风量分配不合理和井下作业环境差等问题,提出了优化主通风机运行工况,增加深部回风工程和加强密闭等措施,并用Ventsim软件建立了三维仿真模型,进行仿真模拟验证。结果显示,主通风机双机35 Hz频率运行时,通风系统装机功率845 kW,实耗功率345.2 kW,风机平均效率70.8%,总风量137.3 m^(3)/s,风量分配合理,采区通风效果得到明显改善。

There are many problems in high altitude mine ventilation,such as complex system,low ef⁃ficiency of ventilation equipment and poor ventilation effect.Based on theoretical analysis,field measure⁃ment and 3D simulation,the complex ventilation system of a super-high altitude polymetallic mine is opti⁃mized,and the mine air demand and air distribution are calculated according to the mining operation plan.In view of the problems found in the field measurement,such as insufficient total air volume,low efficiency of the main fan,unreasonable distribution of air volume in the middle section and poor underground working environment,an optimization and transformation scheme was proposed to optimize the operating conditions of the main fan,increase the deep return air project and strengthen the airtight.A 3D simulation model was established by Ventsim software for simulation and verification.The results show that the installed power of the ventilation system is 845 kW,the actual power consumption is 345.2 kW,the average efficiency of the fan is 70.8%,the total air volume is 137.3 m^(3)/s,the air volume distribution is reasonable,and the ventilation effect the mining area is significantly improved.