Hybrid Finite-Discrete Element Modelling of Excavation Damaged Zone Formation Process Induced by Blasts in a Deep Tunnel

Figure 4

Rock sample for the UCS test and BTS test: (a) rock specimen for the UCS test; (b) rock specimen for the BTS test; (c) rock specimen under the BTS test; (d) rock specimen under the UCS test.

(a)

(b)

(c)

(d)