Pore Structure Characteristics and Evolution Law of Different-Rank Coal Samples

Table 1

Basic information and parameters of experimental coal samples.

Sample	Sampling location	(%)	(%)	(%)	(%)
Sample 1	Dananhu No. 1 mine, Hami mining area	8.02	15.36	42.35	0.43
Sample 2	Gengcun mine, Yima mining area	2.11	11.92	38.16	0.52
Sample 3	Pingdingshan No. 5 mine, Pingdingshan mining area	1.23	15.82	28.82	1.05
Sample 4	Zhujiao mine, Anyang mining area	1.62	11.85	22.16	1.30
Sample 5	Hebi No. 9 mine, Hebi mining area	1.37	12.86	12.93	1.76
Sample 6	Jiulishan mine, Jiaozuo mining area	2.32	12.92	7.68	2.55

Note: , , and are the moisture, ash, and volatile matter contents on the air-dried basis, respectively. is the maximum vitrinite reflectance.