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Mineralogical And Microscopic Evaluation Of Coarse Taconite Tailings From Minnesota Taconite Operations
By Lawrence M. Zanko
Eighteen coarse taconite tailings samples were collected in 2000-2001 from five western Mesabi Range taconite (iron ore) operations located in northern Minnesota, i.e., EVTAC, Hibbing Taconite (Hibtac
Jan 1, 2007
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Investigation of the Rockburst Mechanism of Driving Roadways in Close-Distance Coal Seam Mining Using Numerical - Mining, Metallurgy & Exploration (2021) Modeling Method
By Stanisław Prusek, CHONG WEI, Huawei Xu, Jun Wang, Andrzej Walentek, Artur Dyczko, Derek B. Apel
The excavation-induced stresses transferred from the panels or pillars in upper coal seams play a key role in the occurrence of rockbursts in driving roadways during close-distance coal seam mining, w
Aug 26, 2021
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Regulatory Toxicology And Pharmacology - Introduction - International Symposium On The Health Hazard Evaluation Of Fibrous Particles Associated With Taconite And The Adjacent Duluth Complex
This international symposium was convened to assess the current state of knowledge concerning the health hazards that might be associated with the ingestion and inhalation of fibrous particles produc
Jan 1, 2008
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Heap Leaching Discussed at Roundtable
By Kerry Lahti, Bryan Ulrich
On Feb. 11, 2005, more than 20 mining professionals gathered in Elko, NV for a day-long round-table discussion on heap leaching. Attendees included project managers, operators and environmental profe
Jan 1, 2005
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Tough Times Not Enough To Deter More Than 2,200 From Northwest Mining Meeting
Amid some of the worst economic conditions that the mining industry has been faced with in more than a decade, the mood among the large crowd at the 114th Annual Northwest Mining Association?s annual
Jan 1, 2009
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A Forward Look into the U.S. Rare Earths Industry; How Potential Mines Can Connect to the Global Ree Market
"Mining used to be a business primarily focused on the technical aspects of getting valuable ore out of the ground and extracting the minerals efficiently. Without denying the importance of these skil
Jan 1, 2018
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Significant Developments In Dry Rare-Earth Magnetic Separation - Preprint 09-004
By M. Dobbins
The advent of the more efficient and effective rare-earth roll (RER) separator in the early 1980?s began a new era of dry magnetic separation. The RER units quickly became the separator of choice with
Jan 1, 2009
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South Cobb Tunnel - Cobb County?s Solution To Meeting Future Waste Water Capacity
By Wojciech Klecan
Cobb County, located on the northwest side of Atlanta, GA, is continually growing and, like many other metropolitan areas, it needs to increase the capacity of its waste water system to meet future de
Jan 1, 2009
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Development Of A Methodology That Integrates Environmental And Social Variables In The Investment Decision Process For Mining Projects
By J. A. Botín
In modern mining, the core of mine planning and design is the block model, a simplified representation wherein the ore deposit is divided in a number of virtual rock cubes, each characterized by techn
Feb 27, 2013
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Energy Fuels Prepared To Ride Uranium?s Resurgence
The two candidates in the upcoming presidential election in the United States each say that they have their own solution to the nation?s energy problems - solutions that will increase the amount of en
Jan 1, 2008
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Does sustainable mining have any meaning?
Sustainable development is at odds with reality in the minerals industry. Increasing world population and aspirations are leading to increased energy and mineral consumption. Non-renewable fossil fuel
Jan 1, 2011
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Geotechnical Investigations for Tunneling in Glacial Soils
By David Chapman, Glen Frank
Due to the transport mechanics of the depositional environment, glacial soils display a very wide range of grain sizes and behavior. Several nonstandard drilling, sampling, and analytical techniques a
Jan 1, 2001
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Tunneling Toronto Canada 1970
By G. F. Jenkins, P. S. Hobden
Toronto as a geographical area provides an exceptionally wide variety of subsoil stratiphication. Tunneling consequently required a very wide range of adaptabilities to meet its changing conditions. T
Jan 1, 1997
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Rock Cutting By Jets: A Promising Method Of Oil Well Drilling ? Introduction
By R. Feenstra
In the course of time, an increasing number of investigations on jet cutting all kinds of material, such as rocks1, 2, 3, metals4, 5, and wood6 have been reported to serve various applications. This p
Jan 1, 1974
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Role Of Gas Pressure In Underground Coal Mine Bursts And Bump
Face and pillar bursts, bumps and bounces are violent failures that occur in underground coal mines in response to a complicated interplay of face and pillar geometry, seam depth, coal properties and
Feb 27, 2013
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The Candelaria Concentrator Expansion Project
By D. L. Ogonowski, J. O. Marsden
The Candelaria copper-gold mine is located approximately 25 km south and east of Copiapo in Region III, Chile. The original concentrator was designed to treat 28,000 t/d (30,800 stpd) of chalcopyrite
Jan 1, 1999
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Phelps Dodge, Caterpillar Use Technology to Lower Costs
By Steve Kral
For the past several years, copper producers have faced a tough business climate. Nagging low prices forced many them to reduce their production and make other drastic cutbacks just to breakeven. An
Jan 1, 2004
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Cost value of High-angle conveying – 2011
By Joseph A. Dos Santos
"The subject of this writing was first published in 1998 with the emphasis on the hardware cost comparison. Other costs, such as the required land area and spatial volume, were mentioned but not empha
Sep 1, 2016
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Geochemistry of ilmenite and applications to ilmenite provenance and Ti-mineral exploration
By Antonio Pineda, Roger K. McLimans, Felicity E. Lloyd
lmenite is a primary ore feed to the DuPont chloride process for the manufacture of titanium diox-ide pigment. We seek to determine ilmenite geochemistry as a function of original source and as-certai
Jan 1, 2005
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Leica Dozer 2000 At The San Miguel Lignite Mine: The Uses Of GPS Grade Control In Surface Mining
By M. Heger
February 2, 1999 marks a milestone in earth-moving technology at the San Miguel Lignite Mine. It was on that date that The North American Coal Corporation (NAC) took delivery of three Leica Dozer 200
Jan 1, 2002