Экспериментальное и теоретическое исследование разрушения углей и расчет выхода пылевых частиц. I. исследование иерархии масштабов разрушения

Using the fractal analysis of optical images of coal fracture surfaces the characteristic fracture scales for different coal ranks were recognized in the range 1-1 000 μm. The fracture scales revealed fit quite well the universal geomaterial divisibility series that means the each next block in the hierarchy scales is approximately 3 times larger than the previous one. Deviations of the measurement results from the value of 3 could be explained by the influence of block shape.