Effects of Cyclic Loading on the Pore Structure of Anthracite Coal

Table 3

Percentages of the pore volume at different loading frequencies.

Loading condition		Percentage of the pore volume (%)
Frequency (Hz)	Amplitude (MPa)	Micropores	Transition pores	Adsorption pores	Mesopores	Macropores	Seepage pores
4	12–18	18.31	5.41	23.72	41.57	34.72	76.28
7		14.00	9.27	23.27	39.88	36.85	76.73
10		14.91	11.76	26.67	37.20	36.13	73.33
—	15	16.70	17.15	33.85	47.66	18.49	66.15