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

Figure 12

Photos of granite specimens’ facture under unloading confining pressure and triaxial compression. (a) Triaxial compression test. (b)  = 0.2 MPa/s. (c)  = 0.02 MPa/s. (d)  = 0.002 MPa/s.

(a)

(b)

(c)

(d)