Numerical Simulation of Split-Hopkinson Pressure Bar Tests for the Combined Coal-Rock by Using the Holmquist–Johnson–Cook Model and Case Analysis of Outburst

Figure 11

The process of the coal seam of the tunnel exposing: (a) t = 2.8 (μs) (pressure: Min=-4e-05, at elem. #25761; Max=0.00815452, at elem. #32265); (b) t = 14.8 (μs) (pressure: Min=-4e-05, at elem. #25765; Max=0.000868713, at elem. #29220); (c) t = 38.8 (μs) (pressure: Min=-4e-05, at elem. #24173; Max=0.000207775, at elem. #25776); (d) t = 56.9 (μs) (pressure: Min=-4e-05, at elem. #23472; Max=0.000219299, at elem. #25776); (e) t = 116.8 (μs) (pressure: Min=-4e-05, at elem. #24387; Max=0.000138914, at elem. #25768); (f) t = 218.9 (μs) (pressure: Min=-4e-05, at elem. #24171; Max=0.000118043, at elem. #25768).

(a)

(b)

(c)

(d)

(e)

(f)