Engineering & Mining Journal

JUN 2013

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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NEWS-CONTINUED (Africa Regional News - from p. 32) Analyzing RC drilling chips at Husab. The engineering, procurement and construction management (EPCM) contract for the Husab project is held by a joint venture of AMEC and Tenova Bateman. Bulk earthworks have commenced, construction of the temporary road to the Husab mine is well under way, Nampower has approved a guaranteed power supply of 50 MW for the mine, and COMPANY PROFILE- PAID ADVERTISEMENT Carlson Mining Software: Built to Meet the Industry's Needs Carlson Geology, Carlson Underground Mining, and Carlson Surface Mining modules from Carlson Mining are easy-to-learn, affordable, and feature fast-paced technological development driven by clients' needs. This explains why Carlson Software is the largest provider of software for mines in the United States and is expanding to serve companies in Russia, India, South America, Europe, Australia and more. Whether the application is permitting, geologic mapping, underground mining, surface mining, reserves studies, reclamation or machine control, Carlson provides uniquely powerful automation combined with its trademark ease-of-use. Over 25 years of development, Carlson has moved from focusing on mapping and permitting tools, to introducing the concept of lisp programming inside AutoCAD to enter the "takeup" notes of the underground surveyors. This progression has led to a comprehensive set of mine mapping tools, including projections, symbol placement and mine quantity calculations. Carlson Mining 2014, which will be released in June 2014, offers dozens of improvements to the feature-rich software, including: • Parent/Child Strata Splits—Improved reporting in Surface Mine Reserves to automatically report quantities as parent strata for areas without children strata. • Surface Mine Reserves—Improved speed to run more than three times faster with an option added to process with low precision on grid cell subdivision for running another two times faster for quick, rough calculations. 52 E&MJ • JUNE 2013 • Underground Solids—New set of commands for underground cavities to model, draw, label and get quantities. Other recent enhancements to the software have included expanding 3-D abilities within bench pit design, added methods to assign block sequence by rules with added real-time display of selected quantities and qualities in scheduling selection; augmentation of the haul truck cycle analysis routines, enhanced visual feedback in the underground timing sequencing, and increased ability to produce customized, more professional reports. In addition, Carlson machine control software, Carlson Grade, TruckPro, and Fleet Manager Office, allows mine management to increase productivity, accurately track materials, and enhance safety on the site. For reclamation needs, Carlson's unique Natural Regrade program enables mining operations to not only meet, but also exceed environmental standards. Natural Regrade with GeoFluv creates a landscape that harmonizes with natural forces and does not require expensive longterm maintenance and repair. Carlson Natural Regrade and the full range of Carlson products have been endorsed by the U.S. Office of Surface Mining TIPS program. Carlson Mining 102 West 2nd Street • Maysville, KY 41056 mining@carlsonsw.com • 606-564-5028 www.carlsonsw.com/mining the first water from a temporary pipeline has been delivered from the Rössing reservoir into a newly-built pond at the Husab mine. Current scheduling calls for Husab project completion in October 2015. Asanko Reports Robust Economics for Esaase Asanko Gold in mid-May reported the results of a positive pre-feasibility study (PFS) for its flagship Esaase gold project in Ghana. The PFS considers an open-pit operation producing an average of 200,000 oz/y of gold over a mine life of more than 10 years. Based on the robust economics outlined in the PFS, Asanko has initiated a definitive feasibility study of the project and is targeting completion of the study in the fourth quarter of 2013. Asanko is a Canadian junior company headquartered in Vancouver. The company was formerly known as Keegan Resources but changed its name to Asanko Gold on March 1, to reflect the region in Ghana where it operates. The Esaase project is located about 200 km northwest of Accra, Ghana's capital, and 35 km southwest of Kumasi, the regional capital. The Esaase PFS includes a detailed life-of-mine plan based on measured and indicated resources of 4.41 million oz of gold grading 1.45 g/mt at a 0.6 g/mt cutoff. These resources include 2.37 million oz of proven and probable reserves at an average grade of 1.41 g/mt. The PFS is based on contract truckand-shovel mining. The mining fleet would include four 18-m3 Cat 6030 excavators and 28 100-mt Cat 777G trucks, plus auxiliary equipment. The plant flowsheet includes conventional crushing, grinding, and gravity recovery, followed by flotation, with the flotation concentrate being reground and then leached in a standard carbon-inleach circuit using AARL (Anglo American Research Laboratories) elution technology. Installation capital for the Esaase project is estimated at $286.4 million, including all associated infrastructure and a 10% contingency. Life-of-mine cash operating costs are estimated at $736/oz, and life-of-mine all-in sustaining cash costs after taxes are estimated at $990/oz. The Esaase permitting process is well-advanced, and Asanko anticipates that it will be completed before the end of 2013. www.e-mj.com

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