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Abstract
The particle size distribution of coal gangue was obtained from a sieving experiment and the representative grading calculated using the statistical values of coarse grain content. A fractal method was proposed and fractal dimension D deduced based on the accumulated mass distribution function. The results indicate that when the value of D is between 1.89 and 2.63, coal gangues are well graded. The use of a fractal method can help to avoid errors associated with calculating grading parameters (Cu and Cc) in traditional theory, and the fractal dimension D can also be used to evaluate the compactability of coal gangues and other bulk materials.
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