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61R Raisebore from RUC Cementation Mining Contractors
RUC Cementation Mining Contractors has modified their fleet of Robbins 61R Raisebores to create a 'low profile' rig. This allows the Robbins 61R to operate in more confined spaces, where height restrictions prevent other equipment from operating.
Specifications:
Raise Diameter: Up to 2.1 meter nominal diameter
Raise Length: 100 meters
Pilot Hole Diameter: 11" Tri-cone bit size
Drive Type: Hydraulic Drive
Drive Speeds: 0-24 rpm
Ream Speeds: 0-6 rpm
Pilot Thrust: 109 tonnes at 24 MPA
Reaming Pull: 230 tonnes at 27.5 MPA
Vertical Drilling: 3m (retracted) / 4.5m (extended)
Dip Angle Limit: Vertical to 45º Flatter angles to 30º from horizontal with special supports
Power Requirements: 170 KVA, 1000 Volt, 3 phase, 50 cycle
Water Consumption: 52 litres per second at 100 PSI (approx). Water is recycled through settling sumps
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