Sandvik Construction is introducing what it says is a completely new tunneling jumbo, the DT912D, especially for limestone applications.
The DT912D - a high reach, single boom jumbo - is completely self-contained. It is powered with a fuel-efficient and environmentally friendly Tier 4 Final diesel engine and equipped with onboard compressor and water tank for air-mist flushing.
Sandvik says the state-of-the-art control system will bring increased productivity in both tunneling and underground mine pro
The DT912D, for limestone applications
The DT912D - a high reach, single boom jumbo - is completely self-contained. It is powered with a fuel-efficient and environmentally friendly Tier 4 Final diesel engine and equipped with onboard compressor and water tank for air-mist flushing.
Sandvik says the state-of-the-art control system will bring increased productivity in both tunneling and underground mine production.
The 24tonne jumbo is designed for fast and accurate drifting and production drilling of cross sections between 12-125m². It features a 25kW high-frequency RD525 rock drill and what Sandvik says is the most powerful engine ever installed on a diesel-hydraulic jumbo, the Cummins Tier 4 Final with 205kW.
As a standard, the jumbo has an electric controlled drilling system with added automatic functions, including one-hole automatics. There is an SB150 universal boom for large, optimally shaped coverage and full automatic parallelism. In addition to face drilling, the versatile boom can also be used for crosscutting, bolt-hole drilling and extension drilling.
An efficient 4m³ onboard compressor and an extra-large 1,000litre water tank for air-mist flushing allow the DT912D to operate independently from the tunnel or mine infrastructure and guarantee longer drilling period from one set up.
The DT912D offers rapid, safe and balanced tramming thanks to its powerful, four-wheel-drive centre articulated carrier.
Also, the ergonomic FOPS/ROPS-complied cabin keeps the noise level under 73dB (A) at all times. As an option the cabin is also available with a lifting system allowing even better visibility for tramming and drilling. This all makes the new jumbo an enjoyable workplace for the operator.
Sandvik offers several instrumentation packages from which customers can choose. The silver package is for drilling angles and depth monitoring, while the gold package offers semi-automatic drilling according to drill plan. The platinum package - the most comprehensive - has automatic boom movements and drilling cycle.
The gold and platinum packages are integrated with the Sandvik iSURE tunnel management tool for accurate drilling, charging and blasting plans. In addition, the iSURE provides useful data collection and analysis reports for improving the work cycle and process and can also be complemented with the new geoSURE rock mass analysis and visualisation system.
