Experimental Study on the Fractal Features and Permeability Characteristics of Low Metamorphic Coal Pore Structure under Thermal Damage

Table 1

Industrial analysis and elemental analysis of the coal samples.

Coal type	Number	Industrial analysis				Ro,max/%
		%	%	%	%
Noncaking coal	XG	1.86	16.51	26.76	54.87	0.59
Long-flame coal	HS	8.54	15.22	35.59	40.65	0.55
Coal type	Number	Elemental analysis
		C%	H%	O%	N%	S%; 1.23; 0.96
Noncaking coal	XG	66.81	3.67	9.32	0.58
Long-flame coal	HS	67.75	5.41	17.38	1.42

: air-dried moisture; : air-dried ash; : air-dried volatile matter; : air-dried fixed carbon; Ro,max: vitrinite reflectance.