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

Figure 14

Failure forms of cracked specimens under axial unloading and radial unloading conditions. (a) Effect of crack inclination angle: 0°, 30°, 45°, 60°, 90°, from left to right. (b) Effect of confining pressure unloading rate: 0.1 MPa/s, 0.5 MPa/s, 1.0 MPa/s, from left to right. (c) Effect of initial confining pressure: 8 MPa, 10 MPa, 15 MPa, from left to right.

(a)

(b)

(c)