Investigations of Coal-Rock Parting-Coal Structure (CRCS) Slip and Instability by Excavation

Figure 12

. Simulations of the roof caving process: (a) 30 m, (b) 40 m, (c) 50 m, (d) 60 m, (e) 70 m, and (f) 80 m.

(a)

(b)

(c)

(d)

(e)

(f)