Laboratory Study on Changes in Gas Desorption Properties of Anthracite after Cyclic Loading

Table 2

Loading conditions for cyclic loading tests.

Test number	Test condition		Loading time (h)
	Loading frequency (Hz)	Amplitude of loading pressure (MPa)
1	10	12–18	6
2	7
3	4
4	7	10–20
5		14–16
6	—	15
7	—	—	—

Notes: Group Nos. 1–5 are the test groups that change the frequency or amplitude alone; group No. 6 is the control group with a constant frequency and amplitude; group No. 7 represents the blank control group without cyclic fatigue loading.