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

Table 4

Fitting equations at different pressure release rates.

Confining pressure unloading rate (MPa/s)	Number	Sample	Fitting equation	Correlation coefficient
0.003	1^#	Coal		0.93496
		Roof rock		0.90399
		Floor rock		0.94312
	2^#	Coal		0.92674
		Roof rock		0.91652
		Floor rock		0.93705
	3^#	Coal		0.94878
		Roof rock		0.93514
		Floor rock		0.94677
	4^#	Coal		0.92781
		Roof rock		0.92695
		Floor rock		0.91746
	5^#	Coal		0.91462
		Roof rock		0.90857
		Floor rock		0.91039
0.03	6^#	Coal		0.96174
		Roof rock		0.96367
		Floor rock		0.95806
	7^#	Coal		0.95763
		Roof rock		0.91875
		Floor rock		0.93548
	8^#	Coal		0.94097
		Roof rock		0.95875
		Floor rock		0.96864
	9^#	Coal		0.93254
		Roof rock		0.92175
		Floor rock		0.91867
	10^#	Coal		0.92671
		Roof rock		0.91538
		Floor rock		0.91274
0.05	11^#	Coal		0.93825
		Roof rock		0.9199
		Floor rock		0.95169
	12^#	Coal		0.94761
		Roof rock		0.92867
		Floor rock		0.94652
	13^#	Coal		0.95173
		Roof rock		0.93635
		Floor rock		0.94174
	14^#	Coal		0.93045
		Roof rock		0.92435
		Floor rock		0.92037
	15^#	Coal		0.92754
		Roof rock		0.91863
		Floor rock		0.91384