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

Figure 9

Experimental results of samples 1^#, 6^#, and 11^# . Among them, (a) is the -- experimental curve of sample 1^# when the unloading confining pressure rate is 0.003 MPa/s; (b) is the -- experimental curve of sample 6^# when the unloading confining pressure rate is 0.03 MPa/s; (c) is the -- experimental curve of sample 11^# when the unloading confining pressure rate is 0.05 MPa/s.

(a)

(b)

(c)