Three-boom drill debuts

SANDVIK has just launched its new three-boom DD530 development/construction drill to the Australian market.

Sandvik has just launched its new three-boom DD530 development/construction drill to the Australian market.

Designed for use in rapid decline development in hard-rock mining, as well as in civil construction tunnelling operations, and suitable for drilling 12-75 sq m cross sections, it is Sandvik’s first new generation three-boom jumbo in Australia.

According to Peter Bates, Sandvik Mining and Construction Australia’s product line manager for underground drills, the DD530 represents a substantial advance in hard-rock tunnelling productivity.

“It’s a combination of our TCAD system, which ensures very accurate drilling precisely as per planners’ design specifications, with the three booms, which give up to 50% higher production than two-boom jumbos, make it a highly productive, accurate drill rig.

“Our TCAD system, which has been considered as proven technology in Europe for several years now, but which has only gained acceptance in Australia in the past couple of years, is a major contributor to increased productivity and drilling accuracy on Sandvik drills,” he said.

This system means the tunnel planners or design team can provide their computer-designed optimum drill patterns to the operator on a USB memory stick. This is plugged into the TCAD, and indicates to the operator precisely where to drill via an in-cab on-screen display.

“This means far more accurate drilling — typically to within 200 mm for mining tunnels and within 100 mm for civil applications — and there’s no need to mark up the drilling points on the rock face, substantially speeding up productivity,” said Bates.

With mines demanding ever-tighter tolerances on tunnel excavations, to reduce overbreak and the need to rebuild over-excavated sections — often at penalty rates — drilling accuracy is becoming more critical, he said.

Associated with TCAD is Sandvik’s TLOG logging system, which logs all drilling activity back to the memory stick, and allows the mine planners or tunnel designers to check that the required drill patterns have been drilled.

The DD530’s three drills use high-frequency HFX5T rock drills powered by 75 kW power packs delivering up to 25 kW of rock drill power at 86 Hz.

The unit has been designed with all daily maintenance points at ground level, for ease of access, and increased safety.

Other design elements incorporated into the drill include Sandvik’s NFP1000 Foam Fire Suppression system.

The carrier is powered by a Mercedes OM904LA Tier 3-compliant engine rated at 110 kW. Fully electronically controlled, it is more fuel-efficient and burns fuel more cleanly, minimising emissions.

This higher power engine — up from 66 kW on previous versions of this jumbo — allows faster tramming speeds of up to 16 km/h on level ground and 4.7 km/h on 14% inclines.

The first DD530 in Australia is on the East Coast for potential upcoming tunnel construction work in Sydney and Brisbane.

“We are getting a number of customers coming to have a look at it, and see if it will suit their future applications,” he said.

“We also see applications for this unit for rapid decline development in underground mining projects in around Australia.”

Peter Bates

Product Line Manager, Underground Drills

Sandvik Mining and Construction Australia

0417 772 108

peter.bates@sandvik.com

Sandvik Mining and Construction Australia

07 3637 7400

info.smc-au@sandvik.com

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