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RUC Cementation Mining Contractors is able to supply a range of Raise Boring equipment, with the expertise and experience to tackle any project, anywhere in the world.

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Robbins 53R

Raise Boring

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Fleet > Raisebore > Robbins 71R

The Robbins 71R is a rugged, extremely compact, powerful raise drill. It provides exceptional reaming capability while leaving more working room in a small station.

Robbins 71RE

Specifications


Raise Diameter 1.1m - 2.4m
Raise Length 300 meters
Pilot Hole Diameter 12¼" Tri-cone bit size
Drive Single speed, constant power, induction motor
Drive Type Electric Drive
Drive Speeds 30 rpm
Ream Speeds 8 rpm
Pilot Thrust 168 ton
Reaming Pull 344 ton at 27.5 MPA
Weight 12,000 kg
Transport Means Sled (self erecting)
Vertical Drilling 3.5m (retracted) / 5.5m (extended)
Dip Angle Limit Vertical to 60º from horizontal.
Power Requirements 350kVA, 415 Volts, 3 phase, 50Hz
Water Consumption 56 litres per second at ~690 Kpa. Water is recycled through settling sumps.