Profiling in Tough Tunnel Projects: Drum Cutter Advantage

The most critical stage in tunneling is smoothing the surface (profiling) after excavation. If tunnel walls are irregular, the cost of concrete required for lining skyrockets.

1. Why Drum Cutter?

Hydraulic breakers cause irregular breakages (Overbreak) on tunnel walls. Drum Cutters, however:

• Precise Profiling: Shaves the wall to provide millimeter-level smoothness.
• Low Vibration: Reduces the risk of tunnel roof collapse.

2. Axial (Vertical) Cutters

For narrow drainage channels or ventilation shafts inside the tunnel, Vertical (Axial) Cutters offer high maneuverability in tight spaces.

Frequently Asked Questions (FAQ)

Q: Does the drum cutter work in hard rock?
A: Drum cutters are very efficient up to 80-100 MPa hardness. In very hard granite (120 MPa+), pick costs increase. In such cases, it is recommended for profiling after blasting.

Q: Is there a dust suppression system?
A: Yes, HKM drum cutters feature integrated water spray nozzles. This system suppresses dust and prevents the picks from overheating.