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Outlook For Copper Prices – Up Or Down?
By John E. Tilton
During the past several years — much to the delight of producing firms and countries — copper prices have surged from under $1 to more than $3/lb. Anyone familiar with the industry also knows that si
Jan 1, 2006
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An Evaluation Of Microseismic Activity Associated With Major Roof Falls In A Limestone Mine: A Case Study
By T. Bajpayee, J. Ellenberger
Microseismic monitoring and evaluation is one aspect of the National Institute for Occupational Safety and Health (NIOSH) research program. Roof falls are often preceded by a period of elevated micro
Jan 1, 2007
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A Novel Approach To Flotation Cell Design
By P. Koh
A novel approach incorporating computational fluid dynamics (CFD) and flotation modelling has been used for investigating flotation cell designs. CFD modelling has increasingly been employed to enhanc
Jan 1, 2011
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U.S. Longwall Development Projected to Increase
By James F. Kvitkovich, George V. Weisdack
Editor’s note: This is the second part of a two-part series on longwall mining in the United States. Part one was published in the December 2005 issue of ME (pp. 21-26). It provided a history of lo
Jan 1, 2006
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Specifications For Initial Support In Rock Tunnels
By William F. Daly, William H. Hansmire
Installation of initial tunnel support is often the most uncertain element of work in the design of, and a contractor bidding on, construction of a rock tunnel. The risks the construction contractor a
Jan 1, 1985
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Communication : The missing link in the minerals industry
By Pat C. Hautala, J. R. Hoskins
This is a new era for the minerals industry. Never before has there been more need for effective communication. So said Robert Anderson, chairman and chief executive officer of Hanna Mining Co. He was
Jan 1, 1985
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One Mineralogist’s View of the PDAC Meeting
By Bruce Geller
Attending the Prospectors and Developers Association of Canada (PDAC) meeting and exhibit has become an annual tradition for many in the mining industry. Similar to last year’s synopsis, this report
Jan 1, 2003
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Theory And Practices Of Fully Mechanized Longwall Mining In Steeply Dipping Coal Seams
Mining steeply dipping coal seams is a difficult task in the mining industry. Prior to 1996, fully mechanized longwall mining methods along the seam strike direction were tried in China and other coun
Jan 1, 2012
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Coal (Coal production by coal-producing regions, 2001)
With the dawning of a new century came the beginning of a new era in the coal industry. Instead of the traditional practice of only buying and selling produced coal in the United States, a coal futur
Jan 1, 2002
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Pebble Project Moves Forward After Election Victory
In Alaska?s southwest corner, in the Bristol Bay region, 476 holes have been drilled to help define the size of the Pebble Project. The results indicate that the deposit holds close to 32 Mt (72 billi
Jan 1, 2009
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Sao Paulo Metro Project?Control Of Settlements In Variable Soil Conditions Through EPB Pressure And Bicomponent Backfill Grout
By Lorenzo Pellegrini
The respect of EPB reference pressure during TBM advance and hyperbaric activities, the complete and effective filling of the annular gap between tunnel lining extrados and the excavation section and
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Nitrogen Inertization At San Juan Coal Company’s Longwall Operation
By Jacques F. Abrahamse, Kevin A. Bahe, T. Arthur Palm, Gregory E. McCluskey, Stephen L. Bessinger
Introduction Basis For System San Juan Coal Company (SJCC) is a subsidiary of BHP Billiton. Until recently, BHP Billiton operated three surface mines in northwestern New Mexico: Navajo, San Juan,
Jan 1, 2005
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Investigations on the Charge Motion and Breakage Effect of the Magnetic Liner Mill Using DEM Mining, Metallurgy and Exploration (9cf37b4b-e4a2-4dea-af46-58cb4a935ca1)
By Jue Kou, Lei Yu, Bern Klein, Lusheng Zhou, Chunbao Sun, Genzhuang Li, Reem Roufail, Amit Kumar
Magnetic liners can improve the performance of ball mills by increasing grinding efficiency, extending service life, and reducing maintenance costs. Despite their importance, the fundamental understan
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Investigations on the Charge Motion and Breakage Effect of the Magnetic Liner Mill Using DEM
By Jue Kou, Lei Yu, Bern Klein, Lusheng Zhou, Chunbao Sun, Genzhuang Li, Reem Roufail, Amit Kumar
Magnetic liners can improve the performance of ball mills by increasing grinding efficiency, extending service life, and reducing maintenance costs. Despite their importance, the fundamental understan
Jun 12, 2019
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Investigations on the Charge Motion and Breakage Effect of the Magnetic Liner Mill Using DEM Mining, Metallurgy and Exploration
By Jue Kou, Lei Yu, Bern Klein, Lusheng Zhou, Chunbao Sun, Genzhuang Li, Reem Roufail, Amit Kumar
Magnetic liners can improve the performance of ball mills by increasing grinding efficiency, extending service life, and reducing maintenance costs. Despite their importance, the fundamental understan
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Building Human Resources Through Systematically Designed Instruction
By R. E. Mclvor
This is an update of an original dissertation on this topic by Lavallee, McIvor and Stolovitch (1992). A step-by-step, technical procedure used to measure and improve the performance of plant grinding
Jan 1, 2008
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Aquatic Life Criteria Are Protective Against Copper-Caused Impairment Of Olfaction In Salmonid Fishes
By J. S. Meyer
Although salmonid fishes (including Pacific salmon and trout) have only intermediate sensitivity to copper (Cu) for traditional toxicity endpoints (survival, growth, and reproduction) and thus do not
Feb 27, 2013
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Reducing Emissions Through The Use Of A Fuel Borne Combustion Catalyst
By R. Curtis
To achieve compliance with 2015 EPA Tier 4 Final regulations, which permit only around 10% of Tier 3 particulate matter (PM) and NOx emissions, a number of technologies are being implemented. Use of a
Feb 27, 2013
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The Design, Commissioning And Operation Of The Castle Valley Plant In Wellington, Ut
By P. J. Bethell
Background Increasingly complex geological conditions, with the presence of high ash binders in the mining horizon were encountered at the A.C. I. Dugout Mine near Price, Utah. This led to the prod
Jan 1, 2008
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A Visualization Technique to Predict Abnormal Channeling Phenomena in the Blast Furnace Operation Mining, Metallurgy and Exploration
By Jia-Shyan Shiau, Chung-Ken Ho
An uneven gas distribution through the burden layers inside a blast furnace (BF) results in abnormal gas resistance or pressure changes. Rapid variations in the abnormal gas resistance will lead to th