Research Article
A New Method for Predicting Residual Strength of Rock in Water Diversion Tunnel Using Drilling Process Monitoring
Figure 6
The thrust force-torque force curves of slate, granite, red sandstone, and limestone.
| (a) |
| (b) |
| (c) |
| (d) |
| (a) |
| (b) |
| (c) |
| (d) |