Micropore Structure and Fractal Characteristics of Low-Permeability Coal Seams

Table 4

Maximum and minimum pore radius and volume/area fractal dimension for the B-1 to B-6 coal samples.

Coal sample	Maximum/minimum pore diameter (nm)	Maximum/minimum pore ratio	Volume fractal dimension		Area fractal dimension
B-1	193.31/3.7	52.24595	2.25	0.99872	1.46	0.72425
B-2	179.56/8.86	20.26637	2.21	0.99987	1.22	0.75084
B-3	97.71/3.25	30.06461	2.91	0.99895	1.79	0.59082
B-4	133.19/3.01	44.24917	2.28	0.99909	1.55	0.77354
B-5	152.66/2.64	57.82576	2.08	0.9994	1.297	0.75619
B-6	111.49/3.56	31.31742	2.57	0.99976	1.41	0.72505