Investigation of Anisotropic Behavior and Statistical Evolution of Acoustic Emission Energy during the Deformation of Layered Sandstone

Figure 4

Failure modes of selected samples after uniaxial compression: (a) A-1; (b) A-2; (c) A-3; (d) B-1; (e) B-2; (f) B-3; (g) C-1; (h) C-2; (i) C-3. The dotted line represents the approximate position of the main fracture surface of specimens.

(a)

(b)

(c)

(d)

(e)

(f)

(g)

(h)

(i)