Influence of Confining Pressure Unloading Rate on the Strength Characteristics and Fracture Process of Granite Using Lab Tests

Table 1

Initial unloading state of rock sample.

Confining pressure unloading rate (MPa/s)	Initial confining pressure/MPa	Initial axial pressure/kN
0.2	5	369.98
	10	414.02
	20	529.96
0.02	5	370.04
	10	414.96
	20	529.84
0.002	5	369.98
	10	414.96
	20	529.96