综掘工作面压风射流对呼吸性粉尘污染的影响规律研究  

Study on the influence of pressurized air jet on respiratory dust pollution in fully mechanized excavation face

作　　者：常伟 王昊[1,2] 辛创业 卢守青[1,2] 刘状 CHANG Wei;WANG Hao;XIN Chuangye;LU Shouqing;LIU Zhuang(Department of Safety Science and Engineering,Qingdao University of Technology,Qingdao 266520,China;Research Center for Accident Prevention Technology in Key Industries of Shandong Province,Qingdao University of Technology,Qingdao 266520,China)

机构地区：[1]青岛理工大学安全科学与工程系,山东青岛266520 [2]青岛理工大学山东省重点行业领域事故防范技术研究中心,山东青岛266520

出　　处：《煤矿安全》2024年第12期115-122,共8页Safety in Coal Mines

基　　金：山东省自然科学基金资助项目(ZR2020QE124,ZR2023ME031);国家自然科学基金资助项目(52404222)。

摘　　要：为了优化煤矿综掘工作面控尘流场结构,提高局部通风系统控除尘效率,实现矿山节能减排及粉尘灾害低碳防控,运用数值模拟对不同压风射流风量及不同作用高度条件下的呼吸性粉尘污染开展研究。结果表明:压风射流风量是影响呼吸性粉尘污染范围的主要因素,随风量增大,向工作面逸散的尘粒聚集时间随之缩短,尘粒积聚区不断后移,粉尘污染范围随之增大;压风射流作用高度是影响掘进司机所在区域呼吸性粉尘污染程度的主要因素,随作用高度增大,粉尘整体污染范围略有增加,掘进司机所在区域平均粉尘质量浓度呈先增大后减小的趋势。基于此,优选了压风射流风量200 m^(3)/min,作用高度2 m;现场应用后,掘进司机处呼吸性粉尘质量浓度降低了55.4%,掘进机后部呼吸性粉尘质量浓度降低了73%以上。In order to optimize the dust control flow field structure of the fully mechanized excavation face in coal mine,improve the dust control efficiency of the local ventilation system,achieve energy conservation and emission reduction in the mine,and low-carbon prevention and control of dust disasters,numerical simulation was used to study the respiratory dust pollution of the fully mechanized excavation face under different pressure air jet volume and action height conditions.The results showed that the pressure air jet volume is the main factor affecting the range of respiratory dust pollution.As the volume increases,the time for dust particle aggregation to escape to the working face decreases,the dust particle aggregation area continuously moves backward,and the range of respiratory dust pollution increases;the pressure air jet action height is the main factor affecting the degree of respiratory dust pollution in the area where the excavation driver is located.As the height increases,the overall range of dust pollution slightly increases,and the average dust mass concentration in the area where the excavation driver is located shows a trend of first increasing and then decreasing.Based on this,the optimal pressurized air jet volume was determined to be 200 m^(3)/min and the optimal action height was 2 m.After on-site application,the respiratory dust concentration at the excavation driver’s site decreased by 55.4%,and the respiratory dust mass concentration in the rear area of the excavation machine decreased by more than 73%.

关 键 词：压风射流 呼吸性粉尘 逸散污染 时空演变 参数优化 

分 类 号：TD714[矿业工程—矿井通风与安全]