Numerical Study of Damage to Rock Surrounding an Underground Coal Roadway Excavation

Figure 14

Evolution of damage and microcracks within the coal roadway-surrounding rock at simulation time-steps. (a) 500, (b) 1000, (c) 1300, (d) 1500, (e) 1800, (f) 2000, (g) 2500, (h) 3000, and (i) 5000.

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