Research Article
Prediction Model of Drilling Performance for Percussive Rock Drilling Tool
Table 4
Results of button impact tests.
| | Test no. | Vrock (mm3) | Arock (mm2) | r (mm) | h (mm) |
| 1
2
3
4
5
Average | 524.6
503.5
503.8
391.2
528.7
490.4 | 380.3
357.0
317.4
236.4
354.2
329.1 | 11.0
10.7
10.1
8.7
10.6
10.2 | 2.7
2.8
3.1
3.2
2.9
2.9 |
|
|
