Permeability of Sand-Based Cemented Backfill under Different Stress Conditions: Effects of Confining and Axial Pressures

Figure 12

SEM patterns of the SBCB under different axial pressures.

(a) 2.5 MPa

(b) 3.5 MPa

(c) 4.5 MPa

(d) 5.5 MPa