The effect of sample particle size on the results of the plastometric index
Through the experimental study of the change rule of the plastic layer index of coal samples less than 1.4 mm,less than 1.5 mm and less than 1.6 mm,it is found that the maximum thickness of the plastic layer Y value of coal samples less than 1.4 mm is less than 1.5 mm,and the maximum thickness of the plastic layer layer Y value of coal samples less than 1.5 mm is less than 1.6 mm.The final shrinkage X value of coal samples less than 1.5 mm and less than 1.4 mm has no significant difference and is greater than that of coal samples less than 1.6 mm.The results show that the particle size distribution of the coal samples less than 1.5 mm basically follows the Rosion--Ramler(R-R)distribution and Gates-Gaudin-Shuzman(GGS)distribution,and the characteristic parameters of the two distributions can be used to characterize the particle size characteristics of the coal samples less than 1.5 mm.The establishment of a mathematical model for the determination of coal samples with coal plastic layer index of less than 1.5 mm is helpful to improve the preparation quality of coal plastic layer index samples and improve the precision of the measurement method of plastic layer index.
sample particle sizeplastometric indicesmaximum thickness of plastic layertesting results
万方数据
维普
