多金属矿巷道掘进炮烟扩散规律研究  

Study on the law of smoke diffusion in polymetallic mine roadway

作　　者：王梦妮 黄刚[1,2] 崔雅婷[1,2] 任高峰 WANG Mengni;HUANG Gang;CUI Yating;REN Gaofeng(School of Resources and Environmental Engineering,Wuhan University of Technology,Wuhan 430070,China;Key Laboratory of Mineral Resources Processing and Environment of Hubei Province,Wuhan University of Technology,Wuhan 430070,China)

机构地区：[1]武汉理工大学资源与环境工程学院,湖北武汉430070 [2]矿物资源加工与环境湖北省重点实验室,湖北武汉430070

出　　处：《中国矿业》2022年第2期113-120,共8页China Mining Magazine

基　　金：国家重点研发计划项目资助(编号:2018YFC0808404)。

摘　　要：以甲玛铜矿4470 m中段为研究对象,针对高海拔金属矿山井下爆破炮烟扩散产生的安全问题,应用Fluent软件开展高海拔金属矿山井下爆破炮烟扩散规律数值模拟计算。基于模拟结果分别从风量为1.56 m^(3)/s、2.03 m^(3)/s两个方面研究风量大小对CO运移的影响,并以风量Q=2.03 m^(3)/s为前提,分析不同风筒直径、风筒口与掌子面距离对CO运移的影响。对爆破后炮烟的扩散区进行巷道炮烟风险演化分析,从CO在巷道中的分布区域方面对通风期间的CO运移规律展开研究。结果表明:当风量为2.03 m^(3)/s、风筒直径为0.5 m、通风时间1580 s时,巷道内的CO浓度值已满足井下作业安全标准。风筒口到掌子面距离与巷道内CO的排除速度呈负相关性,同时要与其他影响因素相结合对井下通风效果进行优化。基于上述规律将炮烟的扩散区域划分为安全区、亚安全区、中度危险区以及危险区4个区域,得出通风时间和风量两者之间的关系式。Taking the middle section 4470 m of Jiama copper mine as the research object,aiming at the safety problem caused by the diffusion of blasting smoke in high altitude metal mine,the numerical simulation of the diffusion law of blasting smoke in high altitude metal mine is carried out by using Fluent software.Based on the simulation results,the influence of air volume on CO transport is studied from two aspects of air volume of 1.56 m^(3)/s and 2.03 m^(3)/s respectively.Based on the premise of air volume Q=2.03 m^(3)/s,the effects of different air duct diameters and the distance between the air duct mouth and the palm face on CO transport are analyzed.The risk evolution of blasting smoke in the diffusion area after blasting is analyzed,and the CO migration rule during ventilation is studied from the distribution area of CO in the roadway.The results show that when the air volume is 2.03 m^(3)/s,the diameter of the air duct is 0.5 m,and the ventilation time is 1580 s,the CO concentration value in the roadway has met the safety standard for underground operation.The distance from the air duct mouth to the face of the tunnel has a negative correlation with the elimination speed of CO in the roadway.At the same time,it should be combined with other influencing factors to optimize the underground ventilation effect.Based on the above rules,the smoke diffusion area is divided into four areas:safe area,sub-safe area,moderate danger area and danger area,and the relationship between ventilation time and air volume is obtained.

关 键 词：高海拔矿山 数值模拟 炮烟扩散 风险演化分析 

分 类 号：TD72[矿业工程—矿井通风与安全]