Bangxin drilling rig
Hard Rock Drilling: Key Operation Specifications
Operation specifications ensure hard rock drilling bit performance effectively.
Granite drilling needs stable axial pressure. Avoid fluctuations to prevent uneven diamond stress.
Control drill lifting speed below 0.5m/s. Reduce impact on bottom-hole bits significantly.
Tips for hard rock drilling operations:
- Use “gradual pressure” for basalt. Start at 70% rated pressure, then increase steadily.
- Lower speed by 30% on lithology changes. Judge hardness via torque variations.
- Never dry drill without circulation. Keep bits cooled and lubricated always.
Trained operators monitor vibration/sound to detect bit issues promptly.