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

Figure 18

Simulation results of fracture development in surrounding rock for coal side support (the pink line represents the open cracks and the blue line stands for the slip cracks): (a) without lag, (b) with a 10000-step lag, (c) with a 20000-step lag, and (d) with a 30000-step lag.

(a)

(b)

(c)

(d)