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The Iron Hill (Powderhorn) Carbonatite Complex, Gunnison County, Co—A Potential Source Of Several Uncommon Mineral Resources
By H. Lowers, B. Van Gosen
The Iron Hill (Powderhorn) carbonatite complex is a 31 km2 alkalic intrusion located about 35 km south-southwest of Gunnison, Colorado. The intrusion has been well studied and described because of its
Jan 1, 2007
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Our Government's Stifling Excesses
By R. E. Murray
"It is a gloomy moment in the history of our country. Not in the lifetime of most men has there been so much grave and deep apprehension; never has the future seemed so incalculable as at this time. T
Jan 1, 1980
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Laboratory Testing for Sulfide Flotation Process Development
"A carefully planned laboratory test program is the foundation for the successful development of a sulfide flotation process. In this paper, the development of a copper-molybdenum flotation process is
Jan 1, 2016
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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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Down-the-Hole Blasthole Drill Jumbos for Underground Stoping
By Bernard F. Anderson
INTRODUCTION In this chapter, the term "down-the-hole drill" (DTH drill) is used as a generic name that encompasses the various trade names and other references such as "downhole drill," "in-the-ho
Jan 1, 1982
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Ground Motion Characteristics in an Underground Burst-Prone Coal Mine
Coal bursts are one of the least understood yet the most critical hazards in underground coal mines. The ground motions induced by seismic events can trigger unstable failure of coal and rock mass and
Jan 7, 2020
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Large Underground Coal Mines Of The 1990?s
By David D. Eyer
Since the decade of the 1990s is nearly upon us, I have focused on what I see are the likely trends featured in new large underground coal mines 10 years from now. I do this from the vantage point of
Jan 1, 1988
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The Bypass Tunnel: Excavation, Interliner, and Lining - RETC2021
By George Schmitt, Ted Dowey, Grant Millener, Sean McAndrew, Eric Jordan
The Rondout-West Branch Bypass Tunnel is being built to bypass a substantial leak in New York City’s primary water supply tunnel. The 13,500 foot long tunnel travels 600 feet under the Hudson River th
Jun 13, 2021
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Fiber Width as a Determinant of Mesothelioma Induction and Threshold*Bolivian Crocidolite: Epidemiological Evidence from Bolivia*Mesothelioma Demography and Exposure Pathways
By R. Guardia, J. Hoskins, E. Claros, Y. Kamiya, R. Ramirez, J. Dalenz, P. Fernandez, E. Ilgren
Crocidolite is a well known causative agent for mesothelioma. Studies have shown that the pathogenicity of the fiber from different mines varies considerably and it has been postulated the parameter t
Jan 1, 2012
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Preprint - Washington, D.C. Impact On Mining In Alaska
By Ernest N. Wolff
You here are all familar with the myriad of new laws, some enacted and some pending, that affect the mining industry. These laws, for example those dealing with suspended matter, affect us in Alaska a
Jan 1, 1973
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Cyprus-Pima Pilot Plant Predictions Vs. Actual Plant Results
By Fred Pena
Cyprus Pima Mining Company is located in the Mineral Hill District of southern Arizona, approximately 22 miles south-southeast of Tucson. Cyprus Pima Mining Company is owned 50.01% by Cyprus Mines Cor
Jan 1, 1974
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Automatic Computation of TBM Face Pressure Using 3D Ground Model - RETC2021
By CK Tsang, Jack Muir, Dharman Gersch, Joshua Barry
Correct face pressure is critical to safe operation of a closed face TBM. If inadequate face pressure is applied, this will lead to excessive ground movement, and may result in collapse of the tunnel
Jun 13, 2021
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Risk Mitigation of Natural Gas in Louisville MSD’s Deep Bedrock, Ohio River Tunnel - RETC2023
By Jacob L. Mathis, Todd Tharpe, Jonathan Steflik, R. M. True
In June 2022, Louisville MSD completed a 6.5 km (4-mile), 6.1 m (20-foot) finisheddiameter CSO conveyance and storage tunnel system located along the Ohio River in downtown Louisville, Kentucky. Durin
Jun 13, 2023
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Project Management For Dummies, Or “How To Improve Your Project Success Ratio In the New Millenium”
By R. J. Hickson
From 1993 through 1999 Cyprus Amax Minerals Company successfully completed eight major construction projects around the world. Six greenfield mines were brought into production, an ongoing operation w
Jan 1, 2000
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Optimal Synthesis Of An Industrial Fluorspar Beneficiation Plant Using A Jumping Gene Adaptation Of Genetic Algorithm
By C. Guria
A modeling, simulation and optimization study of a complex industrial fluorspar beneficiation plant (Kadipani, Gujarat, India) with fourteen/ten flotation banks is carried out to find an optimum/near-
Jan 1, 2009
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Slurry Pumps For The Long Pipelines
By M. L. Rizzone
Since time immemorial, Mother Nature has been transporting slurries with both air and water serving as the carrier medium. Consider for example the formation of the continental shelves off our coast l
Jan 1, 1969
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Dentifying Opportunities To Reduce The Consumption Of Energy Across Mining And Mineral Processing Plants
By R. Steele
In addition to compliance with government emissions and reporting requirements, mining and mineral processing companies are increasing energy efficiency to reduce costs and become more competitive in
Jan 1, 2011
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Preliminary Report On The Geology And Gold Mineralization Of The South Pass Greenstone Belt, Wind River Mountains, Wyoming ? Introduction
By W. D. Hausel
Archean supracrustal rocks of the South Pass greenstone belt of western Wyoming have been the State's most prolific source of gold and iron ore. Actual gold production statistics are incomplete,
Jan 1, 1986
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Silica Control At Reserve Mining Company
By W. J. Nosek
Reserve Mining Company completed construction on a major process modification project in June of 1980. These modifications enabled Reserve to reduce and control its final iron ore pellet silica conten
Jan 1, 1983
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A Study Of Parameters Influencing Direct Coal Firing Of Grate-Kilns
By B. P. Faulkner
In 1974, Allis-Chalmers, in corporation with several iron ore operating companies, began to evaluate direct firing of coal in the GRATE-KILN System. Several coals were ground at the Allis-Chalmers Pro
Jan 1, 1977