Table 6 Experimental parameters with different impact velocities on brittle surface.
Case | Brittle material | Working pressure P (MPa) | Incident velocity vjet (m/s) | Sand ratio ζ (%) | Traverse speed vtran (mm/min) | Stand-off distance H (mm) |
|---|---|---|---|---|---|---|
1 | Red sandstone | 100 | 313 | 30 | 1500 | 2 |
2 | Red sandstone | 120 | 343 | 30 | 1500 | 2 |
3 | Red sandstone | 140 | 370 | 30 | 1500 | 2 |
4 | Granite | 100 | 313 | 30 | 1500 | 2 |
5 | Granite | 120 | 343 | 30 | 1500 | 2 |
6 | Granite | 140 | 370 | 30 | 1500 | 2 |
