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  • SME
    CERN’s LHC Project–Large Caverns in Soft Rock at the Edge of Feasibility

    By 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

  • SME
    Room-and-Pillar Method of Open- Stope Mining - Study of Interrelationships and Constraints in Underground Coal Mining by Room-and-Pillar Methods

    By 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

  • SME
    The Effect Of Weathering On Particle Shape Of Quest A Mine Material ? Preprint 09-018

    By 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

  • SME
    The Market For Metallurgical Bauxite

    By 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

  • SME
    A Step Change in Dragline Performance is Possible Safer. Greener. Lower Operating Cost

    By 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

  • SME
    Critical Surface Tensions Of Wetting Of Low Surface Energy Minerals And Their Separations By Gamma Flotation: Realgar, Talc, Stibnite And Sulfur

    By 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

  • SME
    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

  • SME
    Proportional Hazards Model: A Useful Tool For The Analysis Of A Mining System

    By 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

  • SME
    Thiobacillus ferrooxidans Interaction with Sulfide Minerals and Selective Chalcopyrite Flotation from Pyrite

    By 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

  • SME
    "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

  • SME
    Evaluation of roof bolter canopy air curtain effects on airflow and dust dispersion in an entry using blowing curtain ventilation

    By 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

  • SME
    A tough new world; Mineral processing in the 2010s

    By 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

  • SME
    Evolution Of Geotechnical Properties In Hydrothermal Sulfide Mounds: A Maturation Threshold

    By 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

  • SME
    Dead Burning Magnesium And Aluminum Minerals In A Nichols Shaft Kiln To Produce Refractory Grain Material

    By 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

  • SME
    Waste Water Treatment Plant for Sewage Water in the Sharrcem Plant

    By 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

  • SME
    Controlled Blasting Methods for Excavation of Rock and Concrete in Critical Locations of Tunnels and Shafts

    By 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

  • SME
    An Overview Of The U.S. Bureau Of Mines Developments In Automated Coal Mine Roof Bolting Modules

    By 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

  • SME
    Ground Flow Through Loosened Rock Due to Preceding Mining and Resulting Dangers and Rehabilitation in Uranium Mining

    By 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

  • SME
    The Impact Of High-Cost Canadian Sulfur Production On Sulfur Trade

    By 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

  • SME
    Coal Quality Impacts On Power Plant Operations With Gillette Area Coal

    By 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