We present an account of the background, principles and requirements for the classification of Chinese coals. A great deal of experimental work has been carried out on a wide variety of rich coal resources in China. Studies have been conducted on classification parameters for coals with low,...

Optimal sections have been applied to the classification of bituminous coals according to the magnitudes of the parameters Vr and (G)R.I., which reflect metamorphism and caking properties of coal, respectively. The points at which the sections are divided and the number of groups are determined...