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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FEBRUARY 2018 • E&MJ; 1 www.e-mj.com FEBRUARY 2018 • VOL 219 • NUMBER 2 FEATURES Prospectors and Developers Beware After reviewing a century of Canadian mining in his new book, Teck Chair Norman Keevil tells E&MJ; two lawsuits shed light on the legal implications of seemingly mundane exploration contract negotiations .......... 24 A Simple Spin on Classification In use as an essential classification and dewatering tool for the best part of 90 years, today hydrocyclones play a key role in maintaining concentrator flow. E&MJ; looks at the technology fundamentals and how equipment optimization is still in progress. ............................................ 28 Strategizing to Cut Wear Costs and Problems Check out these new products, systems and tips to handle critical anti-wear applications ................................................................................... 34 Mine Worker Fatigue and Circadian Rhythms How biological clocks respond to light and darkness ..................................... 38 Mining for America Becomes Local Politics State bill to end moratorium on sulfide mining prompts effort to clone development-thwarting ordinances ...................................................... 42 LEADING DEVELOPMENTS Rio Tinto's Autonomous Haulage Achieves 1 Billion Tons ...................................4 Leagold Makes Offer for Brio Gold .....................................................................4 Centerra Completes AuRico Acquisition ............................................................4 Nutrien Emerges From Agrium, PotashCorp Merger ...........................................5 Oyu Tolgoi Finishes Sinking of Shaft 2...............................................................5 AROUND THE WORLD U.S. & Canada: Pretium Plans Major Mine Production Increase at Brucejack .... 6 Latin America: Construction Advances at Cerro Moro .................................... 12 Australia/Oceania: St. Barbara Drills Deep for Gwalia Gold .......................... 14 Africa: Perseus Starts Up Sissingué............................................................... 16 Asia: KAZ Minerals Building Second Concentrator at Aktogay ........................ 18 Exploration Roundup: Polyus Drilling 180,000 m at the Sukhoi Log Deposit ...20 In addition to reports related to exploration and mineral processing, this month's E&MJ; also covers the venti- lation challenges faced by deep mines (See Operating Strategies, p. 46). On the cover, a jumbo drill is lowered from a platform to the shaft bottom at the Oyu Tolgoi mine in Mongolia. (Photo: Turquoise Hill) DEPARTMENTS Calendar ...................................................... 23 Classifi ed Advertisements ............................ 54 Equipment Gallery ........................................ 52 From the Editor................................................2 Markets ........................................................ 56 Operating Strategies .................................... 46 People .......................................................... 10 Processing Solutions .................................... 50 Suppliers Report........................................... 48 This Month in Coal ....................................... 22 Hydrocyclones....28 Wear Protection....34 Processing Solutions....50