Engineering & Mining Journal

DEC 2012

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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GROUND CONTROL Training is clearly critical here, and DSI pointed out that it purposely hires experienced mining professionals to aid its customer base with ground-control installation training issues. Its engineering and R&D; staff work closely with its customers to design products and systems that are 'miner-friendly' for installation and usage, the company added. For Spray On Plastics, Macpherson considered that finding good installers was unlikely to be a challenge, outside of simply finding good miners. "We provide training and on-site technical support, as well as highly experienced contract workers where companies don't feel they have the workforce to apply the material themselves," he said. "We also rent and lease equipment for single projects so that mines do not have to troubleshoot or maintain it on their own." COMPANY PROFILE- PAID ADVERTISEMENT GIW Industries, Inc. Over the last century GIW Industries, Inc. has made its way to the forefront of the slurry pump industry. The company, located in Grovetown, Georgia, USA, has successfully solved its customers' pumping problems by acquiring an unparalleled understanding of slurry pumps and systems and advancing slurry technology— one problem at a time. This translates into pumps that last longer, reduce operating costs and improve production. Pumps Built on True Application Testing GIW knows that wear life is the most critical factor in the design of a slurry pump. With over 40 technical papers and over 30 years of research, GIW leads the world in wear modeling technology. Rock Solid Solutions Recently, GIW introduced its new Mill Duty Xtra Heavy (MDX) slurry pump. The MDX is GIW's newest strategically developed product to satisfy customer demand in the hard rock industry. Developed to increase productivity and decrease costs, all MDX pumps are designed to match the life cycle of mill circuit operations. GIW uses system modeling tools to identify the duty conditions and to select the best solution for each pumping application. The Company As a part of KSB's worldwide pump and valve group, GIW offers single-source solutions for both water and slurry pump problems for customers from the Ukraine to Chile to China. Together both companies have over 150 years of experience in pumps and hydraulics. For complicated slurry transport applications, there's no substitute for that kind of rock solid experience. For more information please visit www.giwindustries.com or +1-706-863-1011 http://www.facebook.com/GIWPumps. 52 E&MJ; • DECEMBER 2012 Comparing Coatings and Costs With TSL technology being developed as an alternative, or add-on, to shotcreting, E&MJ; asked the three companies involved in this area for some ideas on how the costs and long-term durability of the two systems compare. "The costs and long-term durability of the two technologies are not really comparable, as membranes are complementary to sprayed concrete," said Mahoney from BASF Australia. "There is a big difference in performance between these two systems. Sprayed concrete is predominately used for structural ground support and in some cases just to seal rock from weathering, whereas sprayable membranes are not to be used for structural support. Instead, their principal purpose is for sealing rock against weathering or for surface support to bind together scatty ground to reduce the incidence of small rocks from falling out. Due to the speed of application for membranes, this can make them very costeffective against sprayed concrete when used for the correct purpose." "Applied costs are similar between 4 in. of plain shotcrete and 4 mm of RockWeb, but the peripheral costs make RockWeb attractive," stated Macpherson. "Application times and logistical costs are reduced dramatically. RockWeb reduces conveyance volumes by 25 times when compared to dry shotcrete, freeing up valuable cage time. Post-application ventilation times are also reduced." He went on to point out that when applied to the intrados of shotcrete liners, RockWeb can increase the flexural strength of the shotcrete by up to 15%. "The application of the high-tensile layer to the inside spreads tension away from the shotcrete and helps to delay breakage, he added. "When breakage occurs, the residual strength of the shotcrete is improved dramatically as the joints open less, and less material falls out. It is the best choice for protecting shotcrete in large infrastructure areas and high-backs like crushers, internal shafts or shops where small shotcrete ejections can cause serious bodily harm." Harker agreed: "Shotcrete has a proven track record in underground environments and civil works, so its durability is well-understood. Any future TSL system will be tested to ensure comparative durability in any of these www.e-mj.com

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