某铅锌矿回风井口雾气影响因素分析及治理方案研究

Analysis of the factors affecting the fog in the return air wellhead of a mine in Yunnan and research on the treatment plan

为了解决回风井井口段冬季的成雾问题,保障周边居民生活环境质量以及施工运输行车安全,依托云南某铅锌矿通风优化工程,通过对起雾段空气静压、空气温度以及空气相对湿度进行现场测试,依据测算结果分析了井口段雾气形成的影响因素,运用工程热力学原理计算出温度、湿度、风量等因素对雾气形成的作用量,提出了惯性分离式除雾器与活性炭联合作业的除雾方案。介绍了除雾方案结构设计,结合计算流体力学的离散相模型得出治理方案随机产生的雾气颗粒为1167620粒并充满整个巷道空间,巷道劈面及除雾器共同捕集的雾气颗粒为1149650粒,除雾器逃离及巷道空间剩余雾气颗粒为17970粒,除雾效率高达90%以上,从而有效解决了回风井口除雾问题,为矿山井口除雾技术提供了一定的理论指导。

In order to solve the fogging problem of the return air shaft in the wellhead section in winter,to ensure the living environment quality of surrounding residents and the safety of construction and transportation,relying on the ventilation optimization project of a lead-zinc mine in Yunnan,the air static pressure,air temperature and air relative humidity was tested on site,and the factors affecting the formation of mist in the wellhead section were analyzed based on the calculation results.The effects of temperature,humidity,air volume and other factors on the formation of mist were calculated by using the principles of engineering thermodynamics.The combined operation of inertial separation mist eliminator and activated carbon was proposed.The defogging scheme introduced the structure design of the defogging scheme,and combined with the discrete phase model of computational fluid dynamics.It is concluded that the randomly generated fog particles in the treatment scheme are 1,167,620 particles,filling the entire roadway space.The roadway splitting surface and the mist eliminator jointly capture are 1,149,650 fog particles,17,970 particles remaining in the defogger and roadway space,and the defogging efficiency is as high as 90%,which effectively solves the problem of defogging at the return air wellhead and provides a certain theory for the defogging technology at the mine wellhead guide.