Research Article
Research on the Hard-Rock Breaking Mechanism of Hydraulic Drilling Impact Tunneling
Figure 4
Comparison of different FE models.
| (a) dr = 20 mm, di = 200 mm |
| (b) dr = 20 mm, di = 250 mm |
| (c) dr = 20 mm, di = 150 mm |
| (d) dr = 35 mm, di = 200 mm |
| (e) dr = 50 mm, di = 200 mm |