Coal Age

DEC 2012

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mining tires continued to each phase of tire life, helping them save money and increase productivity." In addition to mining tires and the BTAG system, BMS offers a range of services, assisting with everything from strategic planning to technical support. It has seven repair centers located throughout North America. Mining Tires Have a Lot of Data to Share The Michelin Earthmover Management System (MEMS) provides mine operators with data about tire usage conditions. Temperature and pressure are constantly monitored to optimize driving and safety conditions, as well as tire performance. At MINExpo 2012, Michelin introduced an upgrade to this technology. Called MEMS Evolution 2, it is a more high-performance, connected, efficient version of the original system, according to Michelin. It uses a latest-generation TPMS sensor as well as new, improved system software. The new system reportedly has a user-friendly interface and uses wireless technology to provide direct access to data regardless of where the vehicle is located in the mine. If a temperature or pressure problem is detected on a haul truck tire, it sends a signal to the team that manages the haul trucks. The alert signal appears on the monitor in the mine management center and the driver is informed of the problem. Depending on the nature of the problem, a decision is made to stop the truck, change its speed or direct it to take another route to protect its tires. A new interface enables real-time tire monitoring for an entire vehicle fleet. It also records in real time all data from a haul truck. It provides mine operators with standard or personalized tire fleet analyses. MEMS Evolution 2 is in continuous contact with the mine's warehouse to manage inventory. Michelin introduced MEMS in 2007, six years after it developed the XDR 59/80 R, the mining industry's first 63-inch tire, which allowed today's ultra-class payloads of more than 360 tons. During MINExpo, Michelin introduced the XDR2, the second-generation of the tire, which integrates the most recent technological advances made by Michelin's research teams. The company deploys engineers and analysts to the mines to monitor tires fitted on mining equipment and to take measurements that will drive continuous improvement in its tire offerings. With this combination of expert teams and technical resources, Michelin believes it can more effectively meet the expectations of mining customers around the world. Clearly, mining operations need to become more productive. Today's equipment is extremely powerful. Tires need to support this trend, delivering greater reliability and robustness while making it possible to transport increasingly heavy loads. In addition, Michelin is focused on enhancing the environmental performance of its Earthmover tires, in particular by reducing the amount of raw materials integrated into its products. In short, the goal is to carry heavier loads with tires that contain fewer raw materials. The XDR2 makes haul trucks safer while enabling users to improve their productivity and optimize their environmental performance. The improved safety is due to three factors: 2 million hours of tests to ensure its reliability, MEMS, and the tire's enhanced resistance to cuts and scrapes, which reduce tire-damage incidents. Compared with the previous-generation tire, the XDR2 has a tread band that is up to 20% thicker and helps reduce operating costs by improving both longevity and durability. Similarly, the layer that separates the tread from that tire casing is 10% thicker, making it more robust and resistant to cuts and scrapes. The tread pattern has also been thoroughly reworked to improve efficiency. The center block is 13% wider while the tread was designed to be self-cleaning. This also helps the tire to cool faster, as the ventilation effect is 10% greater than its predecessor. In addition, the tread pattern changes with wear. Consequently, the XDR2 has a larger contact patch when the tire is 50% worn. C2 technology developed by Michelin makes tires stronger thanks to the use of thicker, corrosion-resistant cables. The technology reduces temperature buildup of the tread shoulder, thus maximizing the potential life of the tire without compromising operating speed or load carrying capacity. Overall, the new XDR2 is considerably more robust than the previous-generation XDR. The steel protective plies located between the casing and the tread are 60% stronger and feature a new corrosion-resistance treatment. Similarly, the sidewall rubber is twice as thick, providing enhanced resistance to cuts and scrapes. Together, these features deliver optimized endurance, which has been improved by 9% to 20% compared with the previous-generation XDR2. And, it's MEMS ready. Goodyear Gets Back in the Game Michelin unveiled MEMS Evolution 2 at MINExpo 2012. 46 www.coalage.com Goodyear unveiled a 63-inch tire, which is part of its RM (Rock Mining) line, at December 2012

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