Simulation and Experimental Study on the Discontinuous Dynamic Impact on Unidirectional Confined Coal-Rock Damage

Figure 17

Crack propagation on coal surface. (a) q = 0 MPa. (b) q = 1.127 MPa. (c) q = 3.38 MPa. (d) q = 3.943 MPa. (e) q = 4.506 MPa.

(a)

(b)

(c)

(d)

(e)