Comprehensive Fractal Description of Porosity of Coal of Different Ranks

Table 3

Experimental results of specific surface areas of coal samples obtained by mercury intrusion methods.

Sample number	Specific surface area of pore (m²/g)					Specific surface area ratio of pore (%)
	𝑆1	𝑆2	𝑆3	𝑆4	𝑆𝑡	𝑆1/𝑆𝑡	𝑆2/𝑆𝑡	𝑆3/𝑆𝑡	𝑆4/𝑆𝑡
Number 1	0.004	0.095	2.074	4.986	7.159	0.06	1.33	28.97	69.65
Number 2	0.009	0.081	1.751	4.651	6.493	0.14	1.25	26.97	71.64
Number 3	0.005	0.039	2.103	5.124	7.271	0.07	0.54	28.92	70.47
Number 4	0.001	0.017	1.628	4.631	6.277	0.02	0.27	25.94	73.78

Note: the aperture structure classification is the same as that of Table 2.