UNDERGROUND LOAD & HAUL
At 18.5 t payload, the R2900 XE’ s 1.3-t higher payload than the R2900G results in faster load cycle times and provides a threeto four-pass match to the 63-t Cat AD63 underground mining truck. Productivity for the R2900 XE averages in excess of 20 % higher compared with its predecessor, according to the company.
The new Cat underground LHD model comes from the factory equipped ready for a broader range of Cat MineStar solutions than the R2900G. Mine sites can now choose from a range of technologies like Detect for underground, Fleet for underground, Health and Command for underground that enable remote operation ranging from line-of-sight to full autonomy. Additionally, new Autodig technology optimises loading by automating parts of the digging cycle.
Field follow data from a six-month trial showed a 34 % average fuel consumption reduction with the R2900 XE compared with the R2900G, primarily due to its SR electric drive system and hydraulic piston pumps. The R2900 XE also offered 54.9 % lower CO emissions at high idle, while NOx emissions were 34 % and 42.1 % lower at idle and high idle, respectively, Caterpillar says.
At another Australian underground mine, Caterpillar evaluated the performance of the R2900 XE against the Cat R3000H and, even with a smaller bucket and rated payload, the R2900 XE outperformed the larger loader in terms of productivity thanks in part to the R2900 XE filling its bucket 15 % faster.
As part of Caterpillar’ s ongoing continuous product improvement program, based on voice of customer feedback, today’ s Cat R2900 XE design features several updates, including:
• A new counterweight configuration that improves loader stability for machines operating in countries with‘ lighter’ emission regulations. The counterweight compensates for the extra mass provided by engine aftertreatment;
• New front and rear axle speed sensor design for improved reliability;
• A new engine enclosure grouping plus new end frame group with improved rear left- and right-hand-side wear bars to improve machine durability;
• New lift cylinders with improved guarding for in-cylinder sensing;
• Updated grouping of tilt lever lubrication lines for better protection of these lines from falling debris damage;
• New frame handrails and platform design for improved operating longevity;
• The addition of hydraulic service loading arm lock-out pins for improved servicing;
• Updates to the steering system to help prevent component failures and extend system longevity;
• New joystick locations and upgraded seat quality to help improve operator comfort and ergonomics; and
• Updated software improves certain machine features and functions, including traction control, auto retarder, payload systems and more.
The Paus PFL: Reliability and performance
The Paus PFL LHD series has quite a legacy behind it too and is engineered to meet the demanding requirements of underground mining operations.
This legacy is characterised by“ outstanding” reliability and performance, according to the company, with the loaders standing out in the industry, Paus says. They are also available with diesel or electric drive, plus feature radio remote control for enhanced operational safety.
“ At Paus, safety, user comfort, efficiency and durability are foundational principles reflected in every aspect of our LHD-series design,” the company explains.“ Over five decades of expertise in underground mining and tunnelling have been channelled into these compact, high-performance machines, ensuring optimal productivity.”
Paus says it sets industry standards in safety with an innovative driver’ s cabin that