Brittleness Index of High-Rank Coal Reservoir and Its Influencing Factors in Mabidong Block, Qinshui Basin, China

Table 4

Statistics of macerals of coal with different coal-body structures in the Mabidong block.

Coal-body structure	Coal seam	Vitrinite (%)	Inertinite (%)	Minerals (%)
Primary structure	No. 3	82.65	17.3	4.80
	No. 15	91.66	9.00	4.37
	Average	84.49	14.81	4.50
Cataclastic structure	No. 3	81.01	18.99	3.67
	No. 15	83.94	16.06	6.40
	Average	81.98	18.02	4.58
Granulate structure	No. 3	78.21	21.79	4.32
	No. 15	91.95	8.05	6.96
	Average	83.94	16.06	5.86