输煤皮带巷运煤量对扬尘运移扩散影响的数值模拟  

Numerical simulation for effect of coal amount on dust migration and diffusion in belt conveyer roadway

作　　者：张子文[1] 杨帆[1] 吴文豪[2] 李陶[2] 

机构地区：[1]辽宁工程技术大学测绘与地理科学学院,阜新123000 [2]武汉大学卫星导航定位技术中心,武汉430079

出　　处：《环境工程学报》2017年第5期2967-2976,共10页Chinese Journal of Environmental Engineering

基　　金：辽宁省"百千人才工程"人选资助项目(20100921099)

摘　　要：为了掌握输煤皮带巷运煤期间的扬尘分布规律,探索更好的除尘工艺,以某大型煤矿主斜输煤皮带巷为研究背景,构建三维模型,依据气固两相流理论,运用双流体模型对不同运煤量下的粉尘浓度三维分布规律进行数值模拟。结果表明:皮带运煤量的增加,增大了煤流与风流之间的摩擦面积及巷道断面风速,提高了扬尘强度,扩大了高浓度区域范围,显著增加了巷道中下部空间的粉尘污染程度;运煤量的增加对粉尘浓度的影响程度随着距皮带距离的增加而减小;在湿式除尘设计中,可通过自动喷雾系统与煤量监测之间的联动,提高除尘效果。The aims of this study were to understand the concentration distribution law of fugitive dust while transporting coal in the belt conveyer roadway and to explore better dust removal process.Taking the main incline shaft in a large coal mine as the research background,the 3D model of the belt conveyer roadway was constructed.The 3D distribution law of dust concentration with different amounts of coal transportation was simulated using a two fluid model,which was based on the theory of gas-solid two-phase flow.The results show that the addition of coal increased the area of friction between the coal,the air flow and the wind speed of the road section,raised the dust producing strength and expanded the range of high concentration region,while increasing the degree of dust pollution in the middle and lower part of the roadway significantly.The influence of the addition of coal on the concentration of dust decreased with the distance from the belt.It is the linkage between the automatic spray system and the coal mass monitoring that can be adopted to improve the dedusting effect in the wet dust removal systems.

关 键 词：输煤皮带巷 运煤量 扬尘 运移扩散 数值模拟 

分 类 号：X513[环境科学与工程—环境工程]