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Cyanide Leach Process Bans: The Technical Side
By C. A. Young
Cyanide is a fast-acting, highly toxic substance but, at the same time, is deemed essential for sustaining life as well as our standard of living. In this manuscript, the facts about cyanide are pres
Jan 1, 2001
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Excess Spoil Minimization And Fill Stability
By M. Superfesky, P. Michael
Introduction The US Office of Surface Mining (OSM) is proposing changes to the Code of Federal Regulations in the interest of minimizing the adverse effects of excess-spoil-fill construction on the
Jan 1, 2007
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An Update On “The Good, The Bad, And The Ugly” Silica--Revisited
By E. A. Metz
It has been approximately four years since IARC reclassified crystalline silica as a “Group One” substance. Since that time, crystalline silica has been considered a human carcinogen. Silicosis i
Jan 1, 2000
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Feasible Tunnel Construction Options For The Systems Conveyance And Operations Program Reach 3 Tunnel
By S. H. Jason Choi
The Systems Conveyance and Operations Program (SCOP) is being implemented to convey tertiary-treated effluent to Lake Mead near Las Vegas, Nevada. The Reach 3 Tunnel Project is part of SCOP. The tunne
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Conditions For Making Direct Reduced Iron, Transition Direct Reduced Iron And Pig Iron Nuggets In A Laboratory Furnace - Temperature-Time Transformations
By B. Anameric
The pig iron nugget process is gaining in importance as an alternative to the traditional blast furnace. Throughout the process, self-reducing?fluxing dried greenballs composed of iron ore concentrate
Jan 1, 2007
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Project Delivery Models and Risk Allocation for Whole Life Tunnel Management
By D. Caiden, C. S. Covil, P. J. Chamley
The paper describes the background to alternative delivery models, drawing on international experience, and introduces Project Alliancing/Contract Partnering, common risks and risk sharing on tunnel p
Jan 1, 2005
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The Kensico–City Tunnel for New York City Water Supply
By Robert J. F. Goodfellow, William A. T. Meakin, Kevin Clarke, Eric Cole
INTRODUCTION New York City Water Supply—Background and History Since the 1840s New York City has been developing the largest, and perhaps, the best urban water supply and distribution system in
Jan 1, 2005
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Water Resources Development In The Arid Andean Antiplano Southern Bolivia
By S. A. Osterberg, J. L. Breckenridge, R. S. Popielak
Multidisciplinary investigations were completed to prove the availability of water resources for the proposed San Cristóbal silver-lead-zinc mine in the arid Altiplano of Bolivia. Surface water resour
Jan 1, 2002
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Onsite Assembly And Hard Rock Tunneling At The Jinping-II Hydropower Station Tunnel Project
By Stephen M. Smading
The Jinping-II hydroelectric project in China features four parallel headrace tunnels approximately 18-km- (11-mile-) long. Two will be excavated by tunnel boring machines (TBM) and two by drill-and-b
Jan 1, 2009
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Selected Factors Affecting Longwall Mine Layouts In The Pittsburgh Coalbed Of Southwestern Pennsylvania
By A. Iannacchione
Longwall mining began within the Pittsburgh coalbed of Pennsylvania (PA) in the early 1970?s. Originally, longwall mine layouts were designed to fit within existing room-and-pillar operations, where
Feb 27, 2013
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Key Regulatory Issues Planned And Controlled Subsidence
By Gary E. Slagel
The year was 1974. The event - the United States Congress was embroiled over what issues should be included in the proposed national surface mining law. The question - what should be done with undergr
Jan 1, 1986
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Ion Exchange Resins Tailored For Effective Recovery And Separation Of Rhenium, Molybdenum And Tungsten - Introduction
By M. Mikhaylenko
Rhenium, molybdenum and tungsten are the elements demanded by high-end technologies. These metals are found in process solutions in forms of their oxyanions: ReO4-, MoO42- and WO42-. The later two
Jan 1, 2012
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Heartland Corridor Tunnels (203bfe6b-811f-4d1d-8e50-61c86efb90ba)
By Frank P. Frandina
The Heartland Corridor Clearance Improvement Project is part of a regional Public-Private initiative to allow double stack container trains a direct route from the Port of Norfolk through Virginia, We
Jan 1, 2008
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Nonfuel Minerals Projections – Why They Were Wrong
By Ira Sohn
This article revisits global projections made in 1981of eight metallic and fertilizer minerals for the year 2000. The objectives here are to quantify the differences between the projected and observe
Jan 1, 2005
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Mining on the Edge of the Murray Mine
By Sam Ash
The Murray Mine was one of the first mechanized cut-and-fill underground gold operations in northern Nevada. At the end of 2002, mine production began to decline. So the mine entered a phase of remnan
Jan 1, 2006
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Underground Mine Air and Strata Temperature Change Due to the Use of Refuge Alternatives Mining, Metallurgy and Exploration (90281dd3-2aab-47ab-9150-b1897bd40ef5)
By M. A. Reyes, L. Yan
Heat and humidity buildup withn refuge alternatives (RAs) may expose occupants to physiological hazards such as heat stress. The Mine Safety and Health Administration (MSHA) regulations require RAs in
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Application Of Modern Technology In Today’s Limestone Quarry Operation
By B. Moore, Y. J. Zhang
In today’s competitive dimensional stone business environment, use of available technology is critical to achieve and maintain a competitive advantage. Awareness of improvements in diamond cutting tec
Jan 1, 2004
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Exploration (2303cc71-ebf3-44eb-bd90-42769f9f3467)
By D. R. Wilburn
The worldwide budget for nonferrous, nonfuel mineral exploration was expected to increase by 58 percent in 2004 from the 2003 budget, according to Metals Economics Group (MEG) of Halifax, Nova Scotia.
Jan 1, 2005
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Ground-Penetrating Radar for Karst Detection in Underground Stone Mines Mining, Metallurgy and Exploration (af91ef88-58ad-45be-8f21-58666827bf43)
By Jonathan Baggett, Nino Ripepi, Amin Abbasi, Richard Bishop, Juan Monsalve, John Hole
This work focuses on the operational and safety issues associated with karst voids in large opening underground mines. Issues include water inrush, structural instability, and engineering uncertainty
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How To Ensure Seismic Requirements
By A. Fuerst
The recent seismic events have shown that earthquakes have an immense destructive power. Chile was hit in February 2010 with a seismic intensity of 8.8 on the Richter scale, and had loss of about 700
Jan 1, 2012