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  • SME
    The application of vertically-mounted jet fans in ventilation shafts for a rail overbuild

    By R. E. Ray

    Compared to conventional fully ducted axial and centrifugal fan systems, jet fans can offer a number of advantages for control of smoke during fire emergencies and dilution of diesel engine exhaust pr

    Jan 1, 2009

  • SME
    Los Angeles Metro Gold Line Eastside Extension—Tunnel Construction Case History

    By Christophe Bragard, Brett Robinson

    This paper reflects the challenges encountered during the construction of the light rail tunnels under Boyle Heights, in Los Angeles, California. Equipped with two state-of-the-art EPB TBMs, the c

    Jan 1, 2007

  • SME
    A Bubble Coalescence Study Using Sound - Preprint 09-076

    By W. Kracht

    Frothers are surfactants used in floatation to aid generation of small bubbles. Studying events at the moment of bubble creation is a challenge because of the short time frame. This presentation intro

    Jan 1, 2009

  • SME
    Recent Advances In Coal Spiral Development – Preprint 97-82

    By W. S. Weldon, R. M. G. Machunter

    The use of spiral separators for the beneficiation of fine coal typically in the size range - 2+0.lmm is now well established process technology. Developments during the mid 1980's resulted in th

    Feb 24, 1997

  • SME
    International Standards in Public Participation in Financing Oil and Gas Pipelines: The Transparency of Risk Management Measures and Emergency Response Plans

    By E. Nickel

    "Bi- and multilateral banks as well as export credit agencies in the OECD countries, but also numerous commercial banks, last year committed themselves to compliance with the World Bank’s standards. T

    Jan 1, 2005

  • SME
    Keys To Selecting An Expert Electric Motor Shop

    By Fredrick Fränding

    In mining and quarrying operations, electric motors can fail for a variety of reasons. Some failures are directly linked to demanding production requirements and contaminant-laden environments and, co

    Jan 1, 2009

  • SME
    Planning Of Ventilation And Air-Conditioning In Hot And Deep Mines

    By Mehmet Guney

    Acceptable working environments in production areas and service openings of Mindola Mine on the Zambian Copperbelt are currently maintained with an air volume of 1000 cu m/s and 5500 kW of installed

    Jan 1, 1982

  • SME
    Development Of An On-Line Coal Washability Analysis System Using X-Ray Computed Tomography

    By G. T. Adel, J. D. Miller, C. L. Lin

    Washability analysis determines the maximum separation efficiency that can be achieved in the operation of coal preparation plants. Unfortunately, there are no on-line techniques for determining this

    Jan 1, 2000

  • SME
    OCHRE ? A Natural Iron Oxide In The Colored Pigment Market

    By S. D. Bearden

    Color enhances expression and communication in all physical objects experienced in life. Pigments provide color and in some applications have a specific additional function. Natural iron oxides are wi

    Feb 27, 2013

  • SME
    Developing Trees Tolerant to Degraded Mine Soils in an Underground Greenhouse Mining, Metallurgy and Exploration

    By Michael Kukay, Paul Conrad, Cosmas Opoku-Ware

    This project is exploring the potential for developing trees tolerable to degraded un-reclaimed mine site soils and tailings as a solution to re-establishing long-term tree growth on those sites. The

  • SME
    LiDAR Mapping of Ground Damage in a Heading Reorientation Case Study

    The Subtropolis mine is a room-and-pillar mine extracting the Vanport Limestone near Petersburg, Ohio. In February 2018, mine management began implementing a heading reorientation to better control th

    Jan 7, 2020

  • SME
    Mining Development In The Context Of Regional Development

    By K. Oraee

    A comprehensive, harmonic and sustainable development has always been a real concern of state policy makers. To reach such development, regional planning is an approach which is widely applied. Th

    Jan 1, 2012

  • SME
    Quantifying Relationships Between Subsidence and Longwall Face Advance Using DInSAR

    Surface subsidence that results from longwall mining can be large magnitude and can affect significant areas. Conventional methods for subsidence monitoring include leveling, global positioning system

    Jan 7, 2020

  • SME
    An Analysis Of Subsidence Movements Associated With An Abandoned Shallow Room-And-Pillar Coal Mine

    By Yoginder P.

    ACKNOWLEDGEMENTS Authors sincerely appreciate the interest, cooperation and technical support of the coal company management and staff in conducting the study. Without their assistance this study

    Jan 1, 1986

  • SME
    Application of Ground Freezing for Underground Construction

    By Helmut Hass, Michael S. Shultz

    For many tunneling, deep shaft and deep excavation projects ground freezing is one of the best if not the only technique available to create a watertight and load bearing temporary support system in s

    Jan 1, 2005

  • SME
    Use of the Field-Based Silica Monitoring Technique in a Coal Mine: A Case Study Mining, Metallurgy and Exploration (73df3ae5-6ddf-4125-a270-9ce737fe4b48)

    By James J. Meadows, Jason D. Pampena, Emanuele G. Cauda, Lauren G. Chubb

    Exposure to respirable crystalline silica (RCS) can cause serious and irreparable negative health effects, including silicosis and lung cancer. Workers in coal mines have the potential of being expose

  • SME
    Missouri-Rolla’s Online Program Gains Popularity

    By Tad S. Golosinski, R. Larry Grayson

    Online education is not new. During the last decade, it has reached the stage where many universities offer a variety of courses, degrees and programs without any associated residency requirements.

    Jan 1, 2002

  • 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
    Seismic Design Measures for the Retrofit of the Claremont Tunnel

    By Bill Cain, David F. Tsztoo, R. John Caulfield, D. Scott Kieffer

    In 1994, the East Bay Municipal Utility District (EBMUD) commenced a system-wide Seismic Improvement Program to protect their facilities from catastrophic damage. A primary focus of this program has b

    Jan 1, 2005

  • SME
    How to Size Smooth Roll Crushers

    By Adam Zanker

    Smooth roll crushers are widely used as secondary crushers, operating most effectively when set for size reductions in a ratio between 3 or 4 to I. The feed supplied to these units varies from 13 to

    Jan 6, 1980