Mechanical Characteristics and Failure Characteristics of Jointed Rock under Axial Unloading and Radial Unloading

Table 1

Test project of cracked specimens under different axial unloading and radial unloading paths.

Unloading conditions	Cracked inclination angle (°)	Initial axial pressure (MPa)	Initial confining pressure (MPa)	Confining pressure unloading rate (MPa/s)	Axial pressure unloading rate (mm/min)
Axial unloading and radial unloading path	0	60	15	0.5	0.1
	30	60	15	0.5	0.1
	45	60	15	0.5	0.1
	60	60	15	0.5	0.1
	90	60	15	0.5	0.1
	45	60	15	0.1	0.1
	45	60	15	1.0	0.1
	45	60	10	0.5	0.1
	45	60	8	0.5	0.1