不同冲击形式下煤样产尘粒径分布规律研究  

Research on Dust Size Distribution of Coal Impacted with Different Forms

作　　者：郑钢镖[1] 康天合[1] 尹志宏[1] 张弛明[2] 段军 

机构地区：[1]太原理工大学采矿工艺研究所,山西太原030024 [2]山西兰花科技创业股份有限公司,山西晋城048000 [3]内蒙古伊泰集团煤炭股份有限公司,内蒙古东胜017000

出　　处：《采矿与安全工程学报》2007年第1期96-100,共5页Journal of Mining & Safety Engineering

摘　　要：对不同冲击形式下煤样冲击产尘粒径分布规律进行试验研究,运用Rosin-Rammler分布函数进行分析.研究表明,在双对数lnd-ln{-ln[1-F(d)]}坐标系下,粉尘粒径分布的回归曲线均为一条直线,并且线性回归良好.随着冲击次数的增加,回归直线的斜率即破碎性指标n,中位径d50均在不断减小,破碎程度指标λ总体趋势变大。并求得各个不同冲击次数下产尘粒径分布的具体函数表达式,使得对粒径分布规律有了一个量化的认识,从而为指导实际生产降尘、除尘提供了理论上的依据.The size distribution of coal dust formed by different impacting forms was tested and analyzed using the Rosin-Rammler distribution function. The results show that in the lnd-ln{- ln[1-F（d）]} double-logarithmic coordinate system, each of the regression curves of the particle size distribution is a straight line and the linear regression is very good. With the increase of impact times, both the slope of the line （ or the fragmentation index n） and the median-particle-size d50 decrease, but the index of fragmentized degree2 increases. Some specific expressions of particle size distribution under different impacting times are found, making it possible for us to have a quantitative understanding of the particle size distribution rule of coal dust, which have provided a theoretical foundation for dust-reduction and dust removal.

关 键 词：粒径分布 Rosin-Rammler分布函数 破碎性指标 中位径 破碎程度指标 

分 类 号：TD714.3[矿业工程—矿井通风与安全]