静态煤堆风蚀起尘机理及其粉尘扩散影响因素研究  

Researches on Arising Mechanism and Influencing Factors on Diffusion of Static Coal Pile Dust with Wind Erosion

作　　者：汪日生 周新华[1,2] 

机构地区：[1]辽宁工程技术大学安全科学与工程学院,阜新123000 [2]矿山热动力灾害与防治教育部重点实验室,阜新123000

出　　处：《世界科技研究与发展》2015年第5期514-518,共5页World Sci-Tech R&D

摘　　要：对露天煤堆表面煤尘颗粒进行受力分析,然后结合力矩平衡原理,建立煤尘冲击起动模型,验证了煤尘颗粒的起动风速与粒径、含水率、煤堆安息角等参数间存在的多维函数关系。在此基础上,通过理论计算和静态试验,进一步研究了煤尘扩散规律及影响因素,并提出了相应的抑制起动的措施,为煤场周边大气污染评价和治理提供科学依据。The stress of dust particles in the open coal field is analyzed,and then combined with the principle of moment balance,shocking starter model of coal dust is established. The multidimensional function relationship of threshold velocity with particle size,moisture content,angle of repose of coals and other parameters is verified. And at the base of which,the diffusion law and influencing factors is further studied through theoretical calculations and static exeperiments,proposing corresponding measures to suppress the start of coal dust to provide a scientific basis for the assessment and management of the coal field surrounding atmospheric pollution.

关 键 词：煤尘颗粒 受力分析 冲击起动模型 扩散规律 

分 类 号：TD714.4[矿业工程—矿井通风与安全]