Barminco has taken delivery of the world’s first mobile raise boring machine with back reaming capability, adding the feature onto Sandvik’s Rhino 100 Mobile Raise Boring machine.
The underground mining services provider has been using Sandvik’s Rhino 100 machine for 18 months in Ghana and three months in Australia, however, the introduction of module enabling back reaming capability has never been seen before.
Sandvik’s Rhino 100 is a full mechanised and self-contained electro-hydraulic mobile raise borer designed for slot raising in underground mining.
Up until now, a back-reaming module had not been used anywhere in the world on this rig.
Barminco general manager of mining Mick Radi said the new module, which had already been deployed at AngloGold Ashanti’s Sunrise Dam mine in Western Australia, enables safe, efficient upward and downward drilling.
“We are thrilled Barminco is offering a world first for our clients. The new plug and play back reaming module gives us the capability to quickly change from an uphole slotting machine to a conventional back reaming raise bore machine,” Radi said.
“Fast set up times and high drilling productivity is helping us to derisk our clients production plans and increase the certainty of meeting targets.”
Barminco has already been successful using the Rhino100 at its client’s sites in the Goldfields region and said it plans to keep the machine in this region where there is demand.
AngloGold Ashanti mining manager Bryan Watson said the module was already making a significant difference on site.
“This new piece of equipment saves us time, is safer, and will assist us achieving production targets at Sunrise Dam,” he said.
“We appreciate Barminco’s approach to working with us as a client to help us achieve more efficiencies on site.”
The down drilling module drills a pilot hole at 279 millimetres, up to a depth of 200 metres.
This can then be reamed to a diameter of 660 millimetres or back reamed to a diameter of 1.06 metres.
Back reaming can be achieved to a depth of 100 metres with hole angles at a maximum of 15 degrees dump, and 30 degrees to either side from vertical.
The setup time for the machine is two hours, compared with a three to four day set up for a conventional raise boring machine.