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Mixed Potential Oscillations In The Dissolution Of Galena In Ferric Sulfate Solution
By Li Zhou
The kinetics of the dissolution of galena was studied by monitoring the mixed potential of a galena electrode in ferric sulfate solutions. The results show that the mixed potential of the galena elect
Jan 1, 2008
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Leaching Of Nickel And Cobalt From Acid Mine Drainage Sludge
By S. P. Fleming
An acid mine drainage sludge containing 0.26% nickel, 0.21 % cobalt and 4.5% manganese was leached in a one-liter reactor with sulfuric acid in the absence and presence of sodium sulfite. The effects
Jan 1, 1992
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New Design Of High Quality Cast Iron Tubbings For Tunnels And Shafts
By Joachim Klein, Frank Reimann
Nodular-graphite cast iron (GGG) is a material similar to steel, and one which exhibits excellent properties, in particular for components exposed to pressure. GGG cast iron has been used in many case
Jan 1, 1987
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Environmental Issues And Research Associated With MTR Mining In West Virginia
By S. S. Peng, C. T. Holland
Mountain Top Removal (MTR) mining started in West Virginia nearly thirty years ago. This surface mining method can extract multiple coal seams as thin as a few inches thick with total recovery and min
Jan 1, 2000
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Recent Productivity Improvements In The Surface Coal Mining Industry In South Africa - Introduction
By R. W. Chadwick
Coal was discovered in South Africa in the mid 1830's. The earliest exploitation of modern times was probably in Natal where, in a letter dated 20 August 1842, a Captain Smith mentions that a wag
Jan 1, 1982
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Roof And Rib Hazard Assessment For Underground Stone Mines – Preprint 97-113
By L. J. Prosser, A. T. Iannacchione
Unfortunately from 1991 through 1995, 44 miners were fatally injured in the stone industry. Of these 12 occurred at underground mines from a total work force of less than 2,000 miners. Nine of these 1
Feb 24, 1997
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Heartland Corridor Tunnels
By Frank P. Frandina, Michael J. Loehr, Paul E. Gabryszak
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, 2007
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Increased value of refined high sulfur coal
By P. R. Dugan
Sulfur removal from high sulfur coal has several objectives including: a) reduction of the atmospheric load that contributes to the problem of acid precipitation; b) reduction of ash, which contribute
Jan 1, 1988
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Coal Division - Refuse Disposal From Goal Operations ? The Art Of Using Vacuum Disc Filters To Close Plant Water Circuits ? Introduction
By D. M. Carris
Since the Buffalo Creek incident in February, 1972, Federal and state environmental agencies have had the pressure on the coal industry in the Appalachian area to close the coal processing plant water
Jan 1, 1979
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You Can?t Mine Here
By Edward H. Peplow
Mr. Chairman; honored guests; ladies and gentlemen: The subject assigned me today by your committee, according to the program, is "the mineral industry and the public land law I have preferred to
Jan 1, 1967
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Tunneling at Hollywood Reservoir
By D. Olsen, S. Cole, J. Strid, G. Colzani
This paper focuses on the underground tunnel work at the Hollywood Water Quality Improvement Project (HWQIP) in Los Angeles, CA. The HWQIP is being constructed to provide a water distribution system t
Jan 1, 2001
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Using Passive Treatment Systems For Mine Closure A Good Approach Or A Risky Alternative
By J. Wagner, P. Eger, G. Melchert
In 1991, LTV Steel Mining Company decided to close an open pit taconite mine in northeastern Minnesota, using a passive treatment approach consisting of limiting infiltration into the stockpiles and w
Jan 1, 1999
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Evaluation of Post-blast Re-entry Times Based on Gas Monitoring of Return Air Mining, Metallurgy and Exploration
By L. Yuan, J. H. Rowland, D. Bahrami, R. Thomas
Blasting is the main method of production in many non-coal underground mining operations and produces multiple toxic gases as a result. The Mine Safety and Health Administration (MSHA) requires mine o
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Stability Prediction And Performance Of Highwall Steepening In Weak Rock
By D. R. Brox, J. Levell
The Montana Tunnels Mine was mined out to a depth of 900 feet at the end of 1999. The first signs of instability were recognized in 1996 along the upper slope area of the northwest sector when the pit
Jan 1, 2001
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Analysis Of Steel Props Under Different Loading Scenarios - SME Annual Conference 2023
By D. McElhinney, K. Mohamed, T. Batchler, T. Matthews
Steel props are a type of standing support utilized in coal mines to support mine roof. In addition to the vertical roof loading, sometimes the steel props are subjected to lateral loading of spalled
Feb 1, 2023
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Ergonomic Interventions At Vulcan Materials Company (7e1e12a8-2c8d-42fd-aede-72f57e60f631)
By J. Torma-Krajewski, C. Hipes
Many mining companies apply ergonomic principles, but it is done either informally and/or reactively. Examples of an informal approach include replacing worn equipment, such as seats, with models tha
Jan 1, 2007
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Rich Hill, Arizona: Historic Gold District, Modern Gold Rush
By Erik Melchiorre, M. Katherine Crombie, Dante Lauretta, Chris Gholson
Rich Hill, also known as Weaver District No. 2, is among the most productive placer gold locations in Arizona. Located near Congress, AZ (Fig. 1), this district hosted major placer rushes in the 1860
Jan 1, 2003
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Cost Effective Tunnel Development In Slovakia
By John Chadwick
In the drive for faster development advance rates, railbound systems can be advantageous, in the right application. Skanska BS, the contractor to mine-owner VSK Mining, is driving an adit access deep
Jan 1, 2009
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2009 Permeation Test Results For Grouts Made With Ultrafine Cements
By Raymond W. Henn
The 30th annual short course ?Grouting Fundamentals and Current Practice? was held at the Colorado School of Mines, June 22-26, 2009. The field demonstration portion of the course was conducted June 2
Jan 1, 2009
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Copper Losses In Sulfide Concentrate Smelting Slag Are Dependent On Slag Composition
By ?. ?ivkovic
The silicate slag and copper matte that are the byproducts of smelting copper in a reverberatory furnace contain SiO2, FeO, Fe3O4, CaO and Al2O3, and Cu, Fe and S, respectively. These components influ
Jan 1, 2010