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CERN’s LHC Project–Large Caverns in Soft Rock at the Edge of FeasibilityBy Hans-Christian Kurzweil, Klaus Mussger
CERN, the European Laboratory for Particle Physics, are upgrading their existing particle accelerator for the next generation of experiments and have three major packages of underground construction w
Jan 1, 2003
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Room-and-Pillar Method of Open- Stope Mining - Study of Interrelationships and Constraints in Underground Coal Mining by Room-and-Pillar MethodsBy Stanley C. Suboleski, C. B. Manula
INTRODUCTION In any mining operation all possible steps should be taken to increase efficiency. One area for improvement is mine planning and design, particularly in the area of equipment selection
Jan 1, 1982
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The Effect Of Weathering On Particle Shape Of Quest A Mine Material ? Preprint 09-018By S. Nunoo
The shape of particles has a significant effect on the shear strength and deformational characteristics of granular materials. Weathering can change the grain shapes. For example, more weathered sands
Jan 1, 2009
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The Market For Metallurgical BauxiteBy Frederick W. Bauer
The potential worldwide "market" for metallurgical bauxite is about 94 million MT. The high degree of concentration of the alumina sector, combined with the high percentage of long-term contractual re
Jan 1, 1984
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A Step Change in Dragline Performance is Possible Safer. Greener. Lower Operating CostBy R. Adsero
"In view of the decade long decline in worldwide mine equipment productivity and with heavy economic pressures and survival at risk, improvements for those remaining in the game are essential. The lat
Jan 1, 2016
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Critical Surface Tensions Of Wetting Of Low Surface Energy Minerals And Their Separations By Gamma Flotation: Realgar, Talc, Stibnite And SulfurBy M. Yekeler
The critical surface tension of wetting values (Ye) of realgar (AsS), talc [Mg3si401o (OH) 2]' stibnite (Sb2S3), and sulfur (S) were determined by flotation in the absence of conventional flotati
Jan 1, 1994
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Performance Of Conical And Cylindrical Separatory Vessels In Dynamic Dense Medium Separation Processes (95cf2754-0470-4d8f-9ac3-692a943f1881)By G. Ferrara
To obtain a reliable comparison between conical and cylindrical separatory vessels used in dynamic dense medium separation systems, the following studies were made: (1) study of the swirling flow in c
Jan 1, 1998
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Proportional Hazards Model: A Useful Tool For The Analysis Of A Mining SystemBy Dhananjay Kumar
In past, no serious attempts have been made to study the effects of operating environments on performance characteristics of a mining system. In this paper, proportional hazards model (PHM) analysis t
Jan 1, 1992
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Thiobacillus ferrooxidans Interaction with Sulfide Minerals and Selective Chalcopyrite Flotation from PyriteBy P. K. Sharma
The acidophilic and chemolithotrophic Thiobacillus ferrooxidans bacteria grown in the presence of soluble ferrous ions and solid substrates (sulfur, pyrite and chalcopyrite) as their energy source hav
Jan 1, 1999
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"Investment For Progress"By L. C. Raymond
Good afternoon. I have entitled my talk "Investment for Progress," implying thereby a spark of friendly competition by private enterprise with such government-inspired foreign aid and investment progr
Jan 1, 1964
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Evaluation of roof bolter canopy air curtain effects on airflow and dust dispersion in an entry using blowing curtain ventilationBy W. R. SHAHAN, W. R. Reed, J. P. Rider
Roof bolter operators may be exposed to high respirable dust concentrations on continuous miner sections with blowing face ventilation when bolting is performed downwind of the continuous miner. One s
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A tough new world; Mineral processing in the 2010sBy Chee Theng
"What do you think are the most important topics in mineral processing today? It is a question that begs to be asked when more than 100 of some of the best and brightest in Colorado mineral processing
Jun 1, 2016
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Evolution Of Geotechnical Properties In Hydrothermal Sulfide Mounds: A Maturation ThresholdBy B. Waquet
The genesis of a hydrothermal subsea mound, by chimney debris heaping and mineralizing fluid circulating upward, induces a vertical maturation gradient. Connected porosity is easy to measure and, afte
Jan 1, 2011
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Dead Burning Magnesium And Aluminum Minerals In A Nichols Shaft Kiln To Produce Refractory Grain MaterialBy J. T. Graves
Bauxite, dolomite, and magnesite are natural occurring minerals that are used extensively in the manufacture of refractory products. In addition, magnesia produced from seawater or brine finds its way
Jan 1, 1982
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Waste Water Treatment Plant for Sewage Water in the Sharrcem PlantBy John Mastoris, Shkurta Gashi, Kostis Dragasakis, Kostas Kouklidis, Halil Berisha
Water is increasingly recognized as a critical issue for sustainable development, becoming as important as carbon to corporate responsibility and reputation. Although the cement industry’s overall ‘wa
Jan 1, 2017
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Controlled Blasting Methods for Excavation of Rock and Concrete in Critical Locations of Tunnels and ShaftsBy Gordon F. Revey
In underground construction and mining work, situations occasionally occur where hard rock or concrete must be excavated at locations near critical structures or utilities. Fearing damage from blastin
Jan 1, 2001
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An Overview Of The U.S. Bureau Of Mines Developments In Automated Coal Mine Roof Bolting ModulesBy J. E. Bevan
Once mining compromises the stability of a rock mass, the dangerous task of roof bolting begins. Many attempts have been made to automate this process, but there are still many refinements that need t
Jan 1, 1994
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Ground Flow Through Loosened Rock Due to Preceding Mining and Resulting Dangers and Rehabilitation in Uranium MiningBy Rolf Pollak, Jan Tegtrneier, Gerhard Keller, Horst Gerhardt, Wolfgang Müller, Dieter Tetzner
INTRODUCTION Under certain geological and mining conditions mining near the surface results in an intensive destruction of the overlying rock strata. If the system of mine openings remains filled
Jan 1, 1997
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The Impact Of High-Cost Canadian Sulfur Production On Sulfur TradeBy N. Edmonson
A review of the evolution of the North American sulfur market's structure serves to dramatize the kinds of changes that the market is undergoing at the present time. In 1970, the U.S. accounted f
Jan 1, 1996
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Coal Quality Impacts On Power Plant Operations With Gillette Area CoalBy J. E. deMasi
Over the past 12 years, Exxon Coal U.S.A., Inc. has shipped over 150 million tons of coal from two mines, Rawhide and Caballo, located in the Gillette, Wyoming, area. These mines are operated by The C
Jan 1, 1989