【摘要】 以分形理论为工具,系统研究了煤尘的分形特征,提出了客观定量表征煤尘粒度特征的指标——粒度分形维数D。研究表明,煤尘的粒度是分形的,粒度分形维数D客观定量表征了煤尘粒度分布的结构特征。粒度分形维数D与平均粒径Dav之间是负相关的关系,并且各粒级的频率分布对粒度分形维数影响较大,样品中细微颗粒占的比例越高,粒度分形维数越大,颗粒系统相对越复杂。更多还原

【Abstract】 In the paper,the authors studied the fractal characteristics of coal dusts systematically by means of fractal theory and put forward an objectively quantitative characterization for the particle sizes of coal dusts size fractal dimension D.The results show that the particle sizes of coal dusts are fractal,and the relationship between the size fractal dimension D and the average particle size Dav is negative correlation,and each size fraction frequency distribution has great impact on the fractal dimension of particle sizes.The more fine particles in the coal dust sample,the large the size fractal dimension is,and the more complex the coal dust system is.The fractal dimension D has objectively quantitatively characterized the structural characteristics of the particle size distribution of coal dusts.更多还原