Research Article
The Effects of Confining Stress on Rock Fragmentation by TBM Disc Cutters
Table 3
The numerical results under the minimum confining stress of 5MPa.
| | The confining stress levels | The crack initiation force (KN) | The maximum crack angle (0) |
| | 5/5 | 31 | 55 |
| | 5/10 | 40.8 | 45 |
| | 5/15 | 48.8 | 40 |
| | 5/20 | 59 | 38 |
| | 5/25 | 64.4 | 37 |
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