Mechanical Properties and Failure Modes of Rock Specimens with Specific Joint Geometries in Triaxial Unloading Compressive Test

Figure 5

Relationship between deformation modulus and unloading percentage (joint orientation defined as β; joint connectivity rate defined as k): (a) β = 30°, k = 0.3; (b) β = 30°, k = 0.45; (c) β = 30°, k = 0.6; (d) β = 45°, k = 0.3; (e) β = 45°, k = 0.45; (f) β = 45°, k = 0.6; (g) β = 60°, k = 0.3; (h) β = 60°, k = 0.45; (i) β = 60°, k = 0.6.

(a)

(b)

(c)

(d)

(e)

(f)

(g)

(h)

(i)