Modern Mining July 2018

COVER STORY

Automated low-profile cable bolter launched by Sandvik

that no hands-on operator intervention is needed, leading to faster and more precise drill- ing, cable pushing and grouting – and a process that can be reliably repeated. Bolt lengths can also vary according to the strata of the rock and can range from 1,5 to 6 m. Technical cooperation The prototype machine – which was devel- oped in close collaboration with Two Rivers platinum mine in Steelpoort – was developed to specifically address productivity challenges faced by modern mines in South Africa and reduce the risks in the cable-bolting process. According to Sandvik Underground Drills Business Line Manager Saltiel Pule, the Sandvik DS221L is capable of rapidly installing pre-tensioned cable bolts. An onboard batch- ing plant and grouting system ensures bolts can be quickly grouted and protected from the elements. “These cable-bolting operations are tedious in low-profile mining, prone to accidents and slow,” he says. “Our system is pre-tensioned and ensures immediate permanent support.”

Sandvik Mining and Rock Technology continues to set the pace in un-

derground mining with the introduction of its rock-reinforcement cable bolter with automated one-hole drilling designed to dramatically improve safety and productivity.

T he unique Sandvik DS221L will significantly improve safety in mines by removing operators from the danger zone and providing im- mediate and active reinforcement on hanging walls when cable bolts are in- stalled. This means the rock is already secured when the cable bolt is attached and mining can safely continue underneath areas where the grouting – which protects the bolts from corro- sion – cures and hardens. The automated operation of the rig means

Saltiel Pule.

The Sandvik DS221L cable bolter was developed to address productivity chal- lenges faced by modern mines in South Africa.

18  MODERN MINING  July 2018