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  • SME
    An Approach to the Classification of Weak Rock for Tunnel Projects

    By Steve Klein

    Weak rock is an important consideration in tunnel design and construction due to the difficult ground conditions that are often encountered. Nevertheless, when conditions are favorable high advance ra

    Jan 1, 2001

  • SME
    Effects Of Obstructions, Sample Size And Sample Rate On Ultrasonic Anemometer Measurements Underground

    By A. L. Martikainen

    In fluctuating airflow, continuous air velocity recording is the most reliable method of air velocity measurement. It allows for fast recognition of changes and the calculation of long-term averages.

    Jan 1, 2011

  • SME
    A Commercial Coal-Oil-Water Mixture Processing Facility

    By D. C. Fuller

    CoaLiquid, Inc. (CLI) has been in the coal- oil-mixture (COM) business for over five (5) years. The initial pilot processing facility was replaced by a 2000 barrel per day commercial production facili

    Jan 1, 1982

  • SME
    Field-Scale Investigation Of Pulverized Coal Mill Power Consumption

    Twenty field-scale tests were conducted in a 28 MW pulverized coal power plant in Healy, Alaska, to examine mill power consumption in relation to coal grind size. The intent in this field-scale study

    Jan 1, 2008

  • SME
    Chemical Demineralization Of Three Different Graphite Ores From Turkey

    By Ö. Kaya

    The removal of gangue minerals from three different graphite ores (Inebolu, Akdag?madeni and Çoraklidere) from Turkey by acid leaching was studied. Acid leaching experiments were applied to the flotat

    Jan 1, 2009

  • SME
    Annual Review 1992 – Exploration 1992

    Worldwide minerals exploration slipped in 1992 from 1991 levels. Although industrial production figures showed the US economy emerging from recession in early 1992, it was not until February 1993 that

    Jan 1, 1993

  • SME
    Screen Bowl Centrifuge: A High-Efficiency Particle Size Separator

    By M. K. Mohanty

    Over the years, screen bowl centrifuges have been widely used for dewatering fine coal in coal preparation plants in the United States and elsewhere. Its popularity is attributed to its relatively low

    Jan 1, 2008

  • SME
    Ten years of conducting level 1 simulated emergency exercises in Queensland?s underground coal mines

    The inquiry into the explosion at the Moura No. 2 Mine in August 1994 recommended -?Emergency procedures should be exercised at each mine on a systematic basis, the minimum requirement being on an ann

    Jan 1, 2009

  • SME
    Reclamation At The Santa Fe/Calvada Mine Breaks New Ground

    By Leslie Burnside

    Homestake Mining Co. set out to complete final reclamation at a former open-pit gold mine in west central Nevada. The goal was to exceed regulatory standards by satisfying the company's own high

    Jan 1, 1999

  • SME
    Old insurance policies : An often unrecognized source of pollution liability insurance

    By Walter R. Curtner

    Many, if not most, of today's pollution liability claims are related to events ("occurrences") that happened in the past. This fact creates an opportunity to obtain a large amount of insurance co

    Jan 10, 1987

  • SME
    The Effect Of Dissolved Ionic Species On Flotation Of Phosphate Ore

    By V. P. Mehrotra

    The effect of dissolved ions present in plant water on the flotation of phosphate ore from central Florida was investigated. Of the three most abundant ions, namely Ca++, Mg++ and SO4--, calcium ions

    Jan 1, 1986

  • SME
    Comparison Of Flue Gas Desulfurization For Eastern Versus Western U. S. Coals

    By E. A. Sondreal

    Requirements of flue gas desulfurization (FGD) for Eastern and Western U.S. coals will not be the same because of differences in coal sulfur content, ash analysis, and beating value. The effects of th

    Jan 1, 1974

  • SME
    Stress Relief To Control Coal Bursts

    By K. Y. Haramy

    Deep coal mines with strong roof and floor rock frequently encounter face and rib bursts. The burst problem is becoming more severe as mining depth increases, prompting efforts to relieve high stress

    Jan 1, 1987

  • SME
    Computational Fluid Dynamics Modeling Of Spontaneous Heating In Longwall Gob Areas (SME Annual Meeting Feb. 25-Feb. 28, 2007, Denver, CO )

    By L. Yuan, A. Smith

    In order to provide insights for the optimization of ventilation systems for U. S. underground coal mines facing both methane control and spontaneous combustion issues, a computational fluid dynamics

    Jan 1, 2007

  • SME
    Assessing the contribution of underground in-situ coal gasification (UICG) within a sustainable development framework

    By Z. Hyder, M. Karmis

    Underground or In-situ Coal Gasification (UCG or UICG), though not a new concept, is now attracting considerable global attention as a viable process to provide a "clean" and economic fuel from coal.

    Jan 1, 2011

  • SME
    Lake Dorothy Hydroelectric Project Lake Tap And Tunnel, Juneau, AK

    By Jason Morrison

    The Norwegian Lake Tap Method was successfully used to tap into the side of Lake Dorothy 36.5 m (120') below the lake surface. The lake tap allows water to flowinto an access tunnel from the lake

  • SME
    Pipe Conveyor And Belt: Belt Construction, Low Rolling Resistance And Dynamic Analysis

    New developments in the pipe conveyor and belt are advanced to address the growth in the capacity, length and complexity of pipe conveyor systems. Improved belt construction can offer better stability

    Jan 1, 2012

  • SME
    Control of Ground Movements Due to Tunneling with an Earth Pressure Balance TBM

    By Sakai Kunito, Nigel B. Sugden

    If an Earth Pressure Balance (EPB) TBM is operated effectively tunneling can be carried out producing negligible ground movements. Using the methods given in this paper face losses of the order of 0.5

    Jan 1, 2001

  • SME
    Geologic Investigation Of The Muskeg River Mine, Ft. McMurray, Alberta

    By M. Fustic, A. H. Paul

    The geology of the Muskeg River Oil Sands Mine is described to demonstrate how geologic modeling aided in resource evaluation and material characterization during the feasibility and construction stag

    Jan 1, 2002

  • SME
    Planning and Design of the A3 Hindhead Tunnel, Surrey, United Kingdom

    By Tom Ireland, Tony Rock

    The proposed 1.83km long twin bore A3 Hindhead road tunnel planned for contruction in 2008 is being delivered under a Highways Agency Early Contractor Involvement (ECI) contract. The proposed cons

    Jan 1, 2007