Horizontal Raise Boring
Mechanised excavation for horizontal or near-horizontal access.
Rock Boring
With more than 40 years of experience, Master Drilling operates the world's largest raise-boring fleet across demanding mining, civil and energy projects.
What is Raise Boring?
Raise boring creates a vertical or inclined excavation between two levels. A pilot hole is drilled to an underground tunnel before a reamer head is attached and pulled back toward the rig.
The method removes cuttings by gravity and limits the need for people inside the excavation, but still depends on skilled operators, reliable down-hole equipment and powerful rigs.
Rock Boring capabilities
Box Hole Boring
Compact equipment for box holes and slot raises in constrained workings.
Vertical Raise Boring
Large-diameter raises for ventilation, access and material movement.
Directional Drilling
Steered pilot-hole delivery for projects with exacting alignment needs.
Built for work below the surface
Mining
Ventilation shafts, ore passes, service raises and underground access.
Civil
Metro, rail, flood-water, waste and other underground infrastructure.
Energy
Hydroelectric, pumped-storage and specialised underground energy access.
Raise Boring in operation
Videos
Frequently asked questions
How has raise boring evolved?
The fundamental method remains recognizable, while larger and more accurate machines, improved cutters and continuous operational data have expanded the depth and diameter of feasible projects.
How does cutting technology respond to different rock?
Cutter selection, loading, rotation and support plans are adapted to the strength, abrasiveness and structure of the formation identified for each project.
Why does operator experience matter?
Experienced operators interpret machine response and changing ground conditions early, supporting safety, equipment life and excavation accuracy.
Can raise boring be automated further?
Data logging, remote support and automated control continue to improve, while accountable people remain essential for planning and changing field conditions.
Discuss your Raise Boring project with us