Sandvik reveals DT912D tunnelling jumbo drill
Swedish mining equipment giant Sandvik has revealed the DT912D tunnelling jumbo drill, which the company says is designed for fast and accurate drifting and drilling of 12 to 125 square-metre cross sections.
The D912D is billed by Sandvik as a ‘self-contained, air-mist flushing, diesel-hydraulic, high-reach, single-boom jumbo’.
The big drill weighs in at 24 tonnes and is powered by a 205kW Cummins Tier 4 Final diesel engine.
The DT912D contains a 25kW high-frequency Sandvik RD5256 rock drill and an SB150 universal boom for optimal coverage. In addition to face drilling, the DT912D can also be used for crosscutting, bolt-hole drilling and extension drilling.
Three levels of drilling automation are available for the DT912D: the silver package automates drilling angles and monitors drill depths; the gold package offers semi-automatic drilling according to a plan; and the platinum package offers a fully automatic boom movements and drilling cycle.
Both the gold and platinum packages make use of Sandvik’s iSURE geospatial tunnel management tool. In addition to measuring tunnel dimensions, the iSURE system can also collect data and produce analysis reports to improve work cycle processes.
The DT912D’s 4-cubic-metre onboard compressor and 1000-litre water tank for air-mist flushing allow the drill to operate independent of the mine infrastructure. This gives operators greater flexibility in the tasks that can be performed and makes the total cycle time more efficient.
The fully ROPS/FOPS operator’s cabin on the DT912D has been ergonomically designed and insulated against noise and vibration. Sandvik says noise levels inside the cab are under 73dB (A) at all times.
The cab itself can be raised or lowered to increase visibility for drilling and tramming. Tramming the DT912D around site is handled by the unit’s 4WD centre articulated carrier.
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