Simulation of the Uniaxial Mechanical Properties and Crack Evolution of Coal Pillar-Artificial Dam in Abandoned Mines

Figure 15

Crack evolution curves. (a) Single body artificial dam, (b) single body coal pillar, (c) 50° combined body, (d) 60° combined body, (e) 70° combined body, (f) 80° combined body, and (g) 90° combined body.

(a)

(b)

(c)

(d)

(e)

(f)

(g)