Engineering & Mining Journal

DEC 2018

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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10 E&MJ • DECEMBER 2018 www.e-mj.com COMPANY PROFILE-PAID ADVERTISEMENT Addressing Water and Site Challenges with Unparalleled Technical Services The world's constant demand for metals, minerals and aggregates is driving mining companies to optimize operations in both water- scarce and water-abundant regions. Complete site-wide water management strategies that improve mine safety, protect assets and improve ore recovery are critical for a successful mine. WSP's application of proprietary technologies and field tech- niques greatly increases our understanding of subsurface condi- tions, which allows us to develop innovative workflows to improve operational performance and safety. Groundwater Flow and Transport Modeling Mining operations face various challenges throughout the life of mine related to groundwater from pore pressure to plume moni- toring to planning for closure. Using cutting-edge modeling codes and visualization software, WSP develops robust models of existing and future hydrogeological conditions at mine sites for groundwa- ter management, including dewatering, pit slope stability and geo- technical analysis, and environmental applications such as impact assessments, fate and transport of contaminants of concern, point of compliance zones, pit lakes and mine closure studies. With a thorough understanding of site conditions, water quality and future water needs, mines are better equipped to address critical water management decisions resulting in safer operations, compliance with regulatory agencies and cost savings. In Situ Sensor Equipment Installation Monitoring groundwater pore pressures and slope stability at depth typically involves vibrating wire piezometers (VWP) and a time domain reflectometry cable (TDR), which are traditionally installed in a borehole using steel or PVC pipes as a guide. Because the pipes require assembly during the lowering pro- cess, accurately estimating installation hours is a challenge and project miscalculations can result in costly change orders for the operator. To address these challenges, WSP uses a continuous fiber- glass rod (FGR) in place of the steel or PVC pipes. This single unit of a specified length greatly simplifies installation while improving efficiency, quality and safety. This innovative meth- od reduces installation time by an average of 50 percent, and material costs by an average of 30 percent. Mining operations receive quicker installations with more reliable estimates and improved safety at depths over 2,000 feet. Heap Leach Optimization, Reactivation and Closure Heap leach operations are a critical part of ore processing at many mines, generating significant metals production. Optimizing metals recovery and leach efficiency, while minimizing expenditures and production/geotechnical risk, substantially impacts mining returns. WSP employs state-of-the-art in situ measurements coupled with patented heap leach systems and methods to characterize and monitor hydrogeology and geochemistry, including key hydrody- namic and metallurgical parameters, and disposition and move- ment of solutions in heaps, stockpiles and waste rock dumps. WSP uses this comprehensive characterization of inner compo- sition and hydro-dynamics to design and implement engineering and/or operational adaptations. Complementing this integrated 3d characterization, WSP specializes in pressurized injection leaching and engineered biological technologies for enhanced metals recov- ery in both oxide and sulfide ores, non-toxic bio-leaching, in situ bio-fracturing for enhanced recovery in refractory ores, accelerated detoxification of residual cyanide and nitrates, and immobilization/ bio-mineralization of mobile toxic metals. Benefits to Mining Operations WSP's mine water services offer significant benefits and value to mining operations for groundwater inflow control and heap leach optimization: • Well longevity and increased utilization • Optimization of drawdown • Access to hydraulic targets • Better dewatering result from fewer wells • CAPEX and OPEX upside • Dewatered conditions ahead of mining • Heap leach optimization, residual metals recovery and in situ bio-detoxification for accelerated closure WSP is uniquely positioned to design and implement mine dewatering and heap leach solutions that overcome existing challenges for mines worldwide. Find out what we can do for you. wsp.com/usa Open pit mine groundwater model. in situ heap characterization of permeability and gold to design injection leach system in old heap.

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