Engineering & Mining Journal

JUL 2017

Engineering and Mining Journal - Whether the market is copper, gold, nickel, iron ore, lead/zinc, PGM, diamonds or other commodities, E&MJ takes the lead in projecting trends, following development and reporting on the most efficient operating pr

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ROCK BOLTING JULY 2017 • E&MJ; 53 www.e-mj.com www.koeppern.de Köppern roller presses have been proven successful throughout the world in plants specializing in the cost‑saving high pressure comminution of various ores like iron, copper, gold, diamond, molybdenum and lithium ore. The Köppern Hybridur® tires feature an extremely wear‑resistant surface that provides enhanced roller protection when grinding abrasive ores. Köppern – Quality made in Germany. » State of the art HPGRs and wear protection » Process technology know‑how » High plant availability » Low maintenance cost Pilot HPGR testing capabilities in Australia, Canada, Germany and Russia For further information please contact sales@koeppern.de Grind down your maintenance costs Stankus believe these two new rock bolts, the MPA with J-Lok P resin injection and the corrosion-resistant Python M3 with PyFlexU2 coating, will be game changers for deep hard- rock mining operations. Implementing the Systems The miners would use the PythinM3s in the ground that doesn't squeeze. In the deeper parts of the mine, where the ground squeezes, the miners would use the MPA with pumpable J-Lok P system. There are currently two versions of the J-Lok P system, a skid-mounted unit that can be dragged around the mine or a modular unit that can be mounted on the bolting machines. Traditionally, miners would shove a resin cartridge in the hole, which exposes them to risks. Now the bolting machine operator would have a carousel on the rig that is loaded with six or eight bolts with sacrificial bits. Sitting safely inside the cab using PLC controls, the operator drills the hole, pushes a button to switch off the bolt and attach the resin nozzle, and then he pushes another button that injects a preprogrammed amount of resin for the length of the bolt and the hole diameter. "We took the unit to Canada first and tested it," Stankus said. "We brought it back to the plant in Pennsylvania and mod- ified it. Now we are testing it in western U.S., with demonstra- tions requested at several hard rock mines in Canada." Jennmar's engineers developed this system in house. Stankus compared the first prototype that was trialed in Canada to the Model T. With the help of Royal Hydraulic, they streamlined the system, which was then tested in Nevada. Jennmar knows their strengths, which is using steel underground for roof sup - port, not hydraulics. So, they partnered with Royal Hydraulic, which a well-known and respected Pennsylvania supplier famil- iar with the mining business, albeit mostly on the coal-side of the business. Jennmar has now signed a long-term agreement with Royal Hydraulic to supply pumps to support the mines in North America. This could be one the biggest developments for the mining industry in modern times, a fully automated bolting system for hard-rock miners pursuing deeper and deeper deposits. Editor's note: Patents applied for J-Lok P, MPA, PythonM3 and PyFlexU2. Jennmar develop a new resin, which is less abrasive for the cylinders and pump.

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