The Asia Miner

JUL-SEP 2019

The ASIA Miner - Reporting Important Issues to Mining Companies in the Asia Pacific Region

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the asia miner • volume 16 • issue 3 50 PRODUCT NEWS Komatsu has released the P&H 77XR surface mining drill rigs, the first of a new line drills offering safer operaঞon, higher producঞvity and increased maintainability, as well as including semi-autonomous or fully autonomous capabiliঞes. Designed to work in a wide range of applicaঞons, from coal to hard rock mining, the 77XR has a bit loading of 77,000 lb (35,000 kg), and has been designed for maximum versaঞlity, including the ability to carry out rotary tricone drilling or DTH percussive hammer drilling, in single or mulঞ-pass operaঞons. According to Mark Petersen, Komatsu's Naঞonal Product Manager, Mining, the new rig incorporates a number of features that are unique to Komatsu P&H drills, including a new auto bit-changing system and a new boxer-style mast with P&H's exclusive rack-and-pinion pulldown. "Auto bit changing is a major step forward for surface mining rigs, and the 77XR is the first rig on the market to offer this. Quite a few manufacturers have tried to achieve this, and we are the first to come up with a soluঞon," says Mr Petersen. "Our new bit carousel system eliminates the need to change bits manually, speeding up the enঞre process and minimising the operator's handling of bits, reducing the risk of strain or injury. "It's a major safety and producঞvity advance, as it takes operators out of the line of fire, and it allows bit changes to be carried out within five minutes. "The 77XR's auto bit changing – in conjuncঞon with other automated features available, including auto rod changing, high-precision GPS hole-to-hole navigaঞon, auto drilling, auto levelling and auto mast raise – are key steps towards fully autonomous drill rig operaঞon," he said. "This makes a perfect fit with Komatsu's industry-leading commitment to autonomous and semi-automated operaঞons across its haul trucks, dozers and excavators." Mr Petersen said the new rig's rack-and-pinion pulldown has been a standard – and exclusive – feature on P&H drills for many years; the only difference to the rest of the P&H Drill product line is the introducঞon of the boxer style mast. "The combinaঞon of the boxer-style mast and rack-and- pinion pulldown give significant advantages in producঞvity, reliability, bit-loading performance and maintainability. The Komatsu boxer-style masts have only four weld joints running the length of the mast compared with the mulঞple weld-points of convenঞonal laমce-style masts, making it easier to idenঞfy any cracks or other issues, and simpler and quicker to repair. "Again, that strongly aligns with Komatsu's commitment to ensuring our products have a high degree of maintainability, minimising downঞme for service and repairs, and opঞmising availability and producঞvity." He said P&H's proven rack-and-pinion carriage system delivers the same amount of retract force as pulldown force, to assist operators in the toughest condiঞons. "Our opঞmised single rack design engages the pinion in tandem to improve reliability and maximise bit-loading performance." Other improvements on the 77XR include a new and improved lightweight rotary head, allowing the operator to raise and lower the mast with the carriage in the top posiঞon and the complete drill string aached. "This reduces non-producঞve pipe handling ঞme and streamlines the process of tramming between paerns," said Mr Petersen. "Our redesigned mast and carriage also enable effecঞve single and mulঞ-pass angled drilling." To further add to drilling safety and efficiencies, the 77XR can be fied with P&H's high-precision automaঞon soluঞon. "Our auto navigaঞon sensors create a three-dimensional grid that calculates size and distance for obstacle detecঞon and collision miঞgaঞon," said Mr Petersen. "Once over the hole locaঞon, the drill auto-iniঞates the drilling process and drills to the proper depth, the first ঞme every ঞme." Combined with a HawkEye camera system, the drill control system is alerted to any objects or hazards in the drill's path and can take appropriate acঞon. "Our P&H drill automaঞon system improves safety and removes variability, leading to increased uঞlisaঞon and, ulঞmately, higher drill performance." Petersen said the innovaঞons and advances on the new rig helped minimise non-drilling ঞme, translaঞng into up to 12 per cent more drilling, reducing maintenance costs by as much as 10 per cent and increasing producঞvity by up to 5 per cent. "With drilling and blasঞng at the heart of any surface mining process, the more quickly, precisely and efficiently a mine can execute its drill paerns, the more effecঞve the resulঞng blasts. "Our aim with the 77XR has been to beer protect mine workers and equipment, while further increasing mine producঞvity," he said. Brief specs of the P&H77XR are: Bit loading, 35,000 kg (77,000 lb); bit diameters, 200-270 mm; maximum drill depth, single pass, 16.3 m/mulঞ-pass, 85 m; rotary head power, 158 kW; torque, 14,900 Nm@100rpm; engine, Cummins QST30 rated at 783 kW (6.3 kV electric opঞon available). Komatsu's latest P&H surface drill offers safer operation, automation features

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