Variation Law of Infrared Radiation Temperature of Unloading Fracture of Composite Coal-Rock

Table 2

Linear fitting parameters between and stress at different pressure unloading rates.

Discharge confining pressure rate (MPa/s)	Sample	Correlation coefficient	Slope	Intercept
0.003	Coal	0.90224	0.04342	19.93063
	Roof rock	0.90156	0.03529	19.95223
	Floor rock	0.89696	0.03969	19.96863
0.03	Coal	0.93408	0.04243	19.85666
	Roof rock	0.9459	0.02726	20.07382
	Floor rock	0.9212	0.02439	20.19758