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Mechanical Properties of RockBy Frank G. Horino, V. E. Hooker
INTRODUCTION The determination and use of mechanical properties of rock in engineering and rock mechanics are rapidly developing. Many of these properties are determined on intact rock specimens; t
Jan 1, 1982
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Mathematical Modelling Of Oxygen Transfer In A Stirred Tank BioreactorBy Lynton Gormely
Oxygen transfer in a stirred tank bioreactor has been modelled mathematically to determine the trends in transfer efficiency (kg transferred per kWh) with transfer rate, tank depth, superficial veloci
Jan 1, 1990
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Mine subsidence effects on a pressurized natural gas pipelineBy C. K. Blair, V. J. Hucka, E. P. Kimball
In central Utah, a coal mining operation is taking place under an 0.5-m (20-in.) pressurized natural gas pipeline. The room-and-pillar method with pillar extraction is being used to extract the coal f
Jan 1, 1987
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Designing for Process Control at Mingo LoganBy Bruce Hern
The last 10 years have seen a dramatic increase in the requirements for product coal quality control. This has led to electric utility sulfur scrubbing, metallurgical blast furnace optimization and co
Jan 1, 1994
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Planning Methane Control In Underground Coal MinesBy P. C. Thakur
Methane has been a hazard since the beginning of coal mining and has influenced, more or less, every aspect of coal mine design. It is receiving increased attention lately because the rate of methane
Jan 1, 1977
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Mine Escapeway Multiuser Training With Desktop Virtual RealityBy Timothy J. Orr, Jami M. Girard
A NIOSH study on occupational deaths between 1980 and 1989 indicated that in the United States, mining had the highest average annual fatality rate (3 1.9 per 100,000 workers) of any other major indus
Jan 1, 2002
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Ore Grading At The Iron Ore Company Of CanadaBy D. J. Shalanski
In 1962 a computerized data processing system was first installed and programmed for the grading of direct-shipping iron ore from the Sept-Iles terminal of the Iron Ore Company of Canada. Over the yea
Jan 1, 1975
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Western Canadian Coals To Eastern Markets: To And Through Thunder Bay TerminalBy Marcel Michaud
Over the past five years, the two-fold growth in Canada's coal industry "Figure, 1" results primarily from the coking coal market to Japan and, to a lesser degree, by the increasing use of sub-bi
Jan 1, 1975
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Development Of Inter-Laboratory Quantitation Estimate For Free Cyanide In Metallurgical Processing Cyanide Detoxified Reverse Osmosis EffluentBy C. H. Bucknam
Metallurgical processing of gold ores in positive water balance environments has been facing decreasing discharge concentrations in permits and additional requirements to pass acute toxicity testing b
Jan 1, 2012
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Controlling crosscut damage in response to excessive levels of horizontal stress: Case study at the Subtropolis Mine, Petersburg, OHBy Anthony Iannacchione, Tim Miller, Nicole Evanek
The Subtropolis Mine is a room-and-pillar mine extracting the Vanport Limestone near Petersburg, OH. In February 2018, mine management began implementing a new mine layout to better control the negati
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Development Of Sulfuric Acid-Oxygen Leaching For In-Situ Extraction Of Copper From ChalcopyriteBy D. K. Dysinger
The U.S. Bureau of Mines investigated leaching of chalcopyrite with sulfuric acid-oxygen under conditions anticipated during in situ leaching. A central composite experimental design was chosen to s
Jan 1, 1993
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Laboratory Extraction Of Copper From Chalcocite By Roasting, Reduction And SmeltingBy M. M. Fine
Development of a process for winning copper from pelletized chalcocite concentrate without matte smelting and converting is underway at the Twin Cities Metallurgy Research Center, Bureau of Mines. The
Jan 1, 1970
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Settlements Due to Blasting VibrationsBy Werner Bilfinger, Claudio Nahas, Marcelo Waimberg
"INTRODUCTION The so called Porto Maravilha Project consists of the re-urbanization of a 500 ha area in the Rio de Janeiro port region. Several changes in local infrastructure are being implemented, i
Jan 1, 2016
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Identification Of A Barrier Layer Formed On Apatite During H2SO4-Methanol LeachingBy G. M. Wilemon, Swanton. R. G.
The Bureau of Mines is investigating the leaching of phosphate values from Florida phosphatic clay wastes using sulfuric acid (H2SO4) as the leaching agent and methanol as the solvent. Acid-alcohol le
Jan 1, 1992
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Effect Of An Unsaturated Setting On The Hydrology Of In Situ Copper LeachingBy Michael J. Friedel
The permeability and flow capacity in unsaturated media is investigated by the Bureau of Mines for application to in situ copper leach mining at the Cyprus Casa Grande mine site. Moisture retention pr
Jan 1, 1991
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The Channel Tunnel Current Status Of The French Tunnel WorkBy Ph. Vandebrouck
SUMMARY In August 1986, TRANSMANCHE LINK, a joint venture comprising the 10 companies who initially promoted the project, signed a contract with EUROTUNNEL for the design, construction and commis
Jan 1, 1989
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Amoco DevelopsThompson Creek Molybdenum MineBy William A. Gibson, Kenneth P. Neumann
In 1967, development of the Cyprus Thompson Creek molybdenum deposit began near Challis, ID. The first mining claims were staked on an intrusive rock out-crop. Exploration continued for 14 years. In 1
Jan 1, 1984
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The Control Strategy Of Zinc Flotation At The Pyhäsalmi Mine ? IntroductionBy Jorma Miettunen
The Plant. The annual production of the Pyhasalmi mine is 900 000 tons of copper- zinc-pyrite ore containing approximately 0.7 % Cu, 2.5 % Zn and 30 % S. During 1976...1981 altered surface ore, 850 00
Jan 1, 1982
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Mine-Wide Monitoring System Selection Process: Avoiding The PitfallsBy L. J. Blatnica
Throughout the 1980's the tem Mine-Wide Monitoring System has had various meanings for manufacturers of these systems and underground mine operators alike. System suppliers had visions of grand
Jan 1, 1990
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Occurrence and Recovery of Gold from Volcanogenic Base Metal DepositsBy William Petruk
Volcanogenic base metal ores contain about 0.5 to 7 g/T Au, commonly as an intermetallic compound with Ag and/or Hg, and to a small extent • "invisible gold" in pyrite and arsenopyrite. The Au-bearin
Jan 1, 1990