Sandvik Mining has introduced the new Sandvik DD211 underground hard rock mining development drill for narrow-vein applications, featuring safety upgrades and more automation for increased production.

A single-boom electro-hydraulic drill rig, Sandvik DD211 is designed for development drilling, specifically in tight tunnels and curves with radii as little as 2.5m.

According to Sandvik Mining product manager, underground development drills Johannes Välivaara, Sandvik DD211 has been developed primarily for Latin America, North America and CIS markets and has the same key safety and productivity features as the rest of the company’s range of drill rigs.

"A major feature of this new rig is Sandvik electro-hydraulic controls, designed to enable accurate drilling performance in a wide range of rock conditions, ensuring efficient control across a variety of operations," Välivaara said.

"Drilling power is provided through our proven Sandvik RD314 rock drill, ensuring not only improved drilling performance and precision, but also reduced drill steel consumption."

Välivaara added that, as standard, the Sandvik DD211 is supplied with a Sandvik SB20 boom, providing maximum coverage up to 26m2. Optionally, it can be fitted with the innovative new Sandvik SB20NV boom, incorporating a CFX 6/12 telescopic feed, and designed for applications where high levels of maneuverability are required when drilling up-holes and cross-cuts in narrow space environments.

"The carrier has been designed for 2.5m by 2.5m tunnels, providing fast tramming and precise steering functions," Välivaara added.
"At the same time, its turning radius has been reduced to just 2.5m, enabling the rig to negotiate tight curves."

Drilling is controlled through Sandvik THC561 electro-hydraulic control, incorporating constant speed drilling controls, stop-and-return automatics and air-mist flushing with rock drill return.

"Sandvik DD211 incorporates the highest levels of safety, including a fully ROPS/FOPS-compliant canopy, upgraded braking systems, automatic fire suppression and indicator lights for both front and rear jacks."

"Operator comfort has been further improved through the use of a more ergonomically designed seat, including the ability to turn the seat for drilling, and low-effort joystick controls."