Modeling Rock Fracture Propagation and Water Inrush Mechanisms in Underground Coal Mine

Figure 12

Modelled fracture initiation, propagation, and coalescence in the coal pillar and rock mass surrounding the roadway cavern: (a) cycle 9, (b) cycle 12, (c) cycle 14, and (d) cycle 24.

(a)

(b)

(c)

(d)