Atlas Copco launches direct-controlled tunnel rig

  • 28-Dec-2010 05:00 EST
Boomer XL3 D.jpg

Atlas Copco's Boomer XL3 D is a three-boom pilot-hydraulic controlled tunnelling rig with high reach console, BUT 35 booms, and COP 1638, COP 1838, or COP 2238 rock drills.

During the design of its Boomer XL3 D face drilling rig, Atlas Copco says that "great emphasis" was placed on the interaction between operator and machine, particularly for users who prefer a traditional direct control system (DCS). The Boomer's DCS pilot-hydraulic controlled drilling system incorporates RPCF (rotation pressure controlled feed), an anti-jamming function.

A fortuitous benefit of the improved control system is that it contributes to a more quiet cab due to a reduction in the amount of high-pressure hoses near the operator.

The control system’s hydraulics allows for improved precision and simplicity and, together with the new ergonomic control panels, both safety and productivity improvements. Easily accessed service points contribute to the ergonomic design.

The four-wheel-drive rig has a FOPS-certified canopy, which can also be fitted with a vertical lift of 1100 mm (43 in) for improved visibility over the working area. An optional cabin offers what the company describes as a higher degree of operator comfort, with a noise level inside the cabin below 80 dB(A), an air-conditioning unit, and a CD player.

The Boomer XL3 D is equipped with a Deutz six-cylinder Tier 3 engine rated at 173 kW (235 hp) at 2300 rpm. Both the rear and front axles are provided by Dana. Its BUT 35 heavy-duty hydraulic boom features a double tripod suspension for accurate parallel holding in all directions.

For increased productivity and precision, the rig can be fitted with the optional Feed Angle Measurement (FAM) 3. The system helps the operator to drill precisely according to plan, resulting in considerably less over- and underbreak and gives longer rounds.

A wide range of drills for different rock conditions can be fitted to the rig, including the COP 1638, COP 1838, and the more powerful COP 2238. The drills feature dual-damping technology for optimal use of impact power. According to the company, the damping system ensures that the drill bit is pressed into continuous contact with the rock, while efficiently absorbing reflected shock waves from each impact on the rock.

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