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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MAY 2017 • E&MJ; 1 www.e-mj.com MAY 2017 • VOL 218 • NUMBER 5 FEATURES Budgets Trimmed, with Closer Focus Has exploration spending bottomed out? Which companies are most optimistic? Will grassroots project spending pick up? .......................... 30 Design Considerations for Ground Support in Nevada's Weak Rock A new analysis demonstrates how the use of bolts, mesh and shotcrete infl uence the safety factor for ground support programs ............................... 36 Leach Operators Get a Lift from Tech Improvements The pursuit of higher metal recovery enters the digital age — where even time-tested, conventional leach-optimization techniques stand to benefi t from emerging automation and analysis capabilities .................................... 40 LEADING DEVELOPMENTS Barrick Sells 50% Interest in Veladero to Shandong Gold for $960 Million .......4 Freeport's Q1 Copper Output Drops ...................................................................4 Cliffs' Goncalves Expects 2017 to be Phenomenal ............................................5 Newmont Expands Production at Ahafo in Ghana..............................................5 MAC, PDAC Applaud Canada's 2017 Budget .....................................................6 AROUND THE WORLD U.S. & Canada: PSC: Rocanville Ramp-up Well Underway .................................8 Latin America: Leagold Acquires Los Filos Gold Mine from Goldcorp ............. 14 Australia/Oceania: Rio Tinto Deals with Bad Weather .................................... 18 Africa: Ivanhoe Starts Work on Shaft 2 at Platreef ......................................... 20 Asia: Vedanta Completes Cairn Merger .......................................................... 24 Europe: Boliden: Mine Production Attains Record Level ................................. 25 Exploration Roundup: Cartier Resources Drilling 50,000-m Across Four Gold Projects in Quebec .......................................................................... 26 This month, E&MJ; reviews some of the heap leaching techniques mines employ to recover metal. On the cover, the world's largest MSC stacks ore at the Cananea mine in northern Mexico. (Photo: FLSmidth) DEPARTMENTS Calendar ...................................................... 25 Classifi ed Advertisements ............................ 54 Equipment Gallery ........................................ 50 From the Editor................................................2 Markets ........................................................ 56 Operating Strategies .................................... 44 People .......................................................... 12 Processing Solutions .................................... 48 Suppliers Report........................................... 46 This Month in Coal ....................................... 27 Exploration....30 Ground Support....36 Heap Leach....40