The Top Hammer XL, released by Sandvik Mining and Rock Solutions, is a drilling innovation that challenges traditional down-the-hole (DTH) drilling on surface mines and large quarries. It offers a faster, fuel efficient and cost-effective method to drill holes from 140mm to 178mm in diameter – considerably expanding the hole size range of previous top hammer drills.
The system comprises the new Pantera DP1600i drill rig, the new RD1840C rock drill and new LT90 rock tools. According to Chris van Tonder, product master at Sandvik Mining and Rock Solutions, these three components – the rig, rock drill and tools – have been redesigned and mutually optimised to work together seamlessly for exceptional drilling results.
“The proven carrier provides a solid base for the powerful rock drill, which generates an optimum pulse for the effective tooling system. This, in turn, transfers the high-energy shock wave to the rock, with minimum losses,” he explains.
The performance of the Sandvik Top Hammer XL system has been proven in several field tests, where it has drilled over 100 000m in challenging rock conditions. The results showed a 50% reduction in fuel consumption, 25% lower total drilling costs and a 15% increase in productivity compared with the DTH drilling method.
The Pantera DP1600i is the newest member of the Pantera DPi series family of intelligent top hammer drill rigs, achieving high penetration rates and offering advanced automation options for databased fleet management and optimised drilling performance. It is designed for large hole size drilling and brings its practical intelligence and support for higher-level automation solutions.
With its 49kW of drilling power, the new RD1840C rock drill is also built for large hole drilling, boasting a robust design and well-balanced long piston percussion package for demanding conditions. Its new layout of pressure accumulators maximises efficiency and minimises hose vibrations. The Sandvik RockPulse tool stress monitoring system will be available as an additional option on the drill later in 2021.
Developed to match the other components in the Top Hammer XL system, the LT90 rock tools consist of a shank adapter, MF tube rods and drill bits, offering the best possible drilling dynamics and rock breaking efficiency. The tools increase productivity, improve hole straightness, and provide great coupling characteristics and a long service life.