Numerical Analyses on Deformation and Failure Characteristics of Surrounding Rock of Gob-Side Entry Retention by Roof Cutting

Figure 16

Fracture development in surrounding rock (the pink line represents the open cracks and the blue line stands for the slip cracks): (a) group (a), (b) group (b), (c) group (c), and (d) group (d).

(a)

(b)

(c)

(d)