Research Article
Prediction Model of Drilling Performance for Percussive Rock Drilling Tool
Table 2
Parameters of the button impact tests.
| | 
 |  | Description | Value |  | 
 |  | Button diameter Button height
 Button material
 Feed force of actual vehicle
 Feed force of a single button
 Drop height
 Rock specimen
 Rock size
 | 18.0 mm 22.0 mm
 Tungsten carbide
 43.4 kN
 2.9 kN
 1.5 m
 Hwangdeung granite
 300 mm (L) × 300 mm (W) × 600 mm (H)
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