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  • SME-ICGCM
    Load Transfer Distance Calibration of a Coal Panel Scale Model: a Case Study

    By Mark K. Larson

    Calibration of LaModel for deep coal mines begins with adjustment of overburden stiffness for load transfer distance. This calibration determines whether mining induced stresses are concentrated in th

    Jan 1, 2012

  • SME-ICGCM
    Requirements and Performance of Pumpable Cribs in Longwall Tailgate Entries and Bleeders

    By Peter Zhang

    Pumpable cribs are being increasingly used in longwall tailgate entries and bleeders for roof support under abutment pressure. Their high peak capacity and confinement-controlled yield characteristics

    Jan 1, 2012

  • SME-ICGCM
    Advanced Prediction Methods for Roadway Behaviour by Combining Numerical Simulation, Physical Modelling and In-Situ Monitoring

    By Andreas Hucke

    For the roadway design in the German hard coal mining industry, an advanced combined planning system has been applied during the past 20 years. The German mining industry is working with single entry

    Jan 1, 2006

  • SME-ICGCM
    Electrical Measurements of Coal Measure Rocks for Electromagnetic Applications in Mining Industry

    By Nikolay Boykov

    Subsurface imaging technologies are part of the electromagnetic (EM) geophysical methods. EM technologies such as radio imaging method (RIM), ground penetrating radar (GPR), and drill string radar (DS

    Jan 1, 2006

  • SME-ICGCM
    Recent Trends of Coal and Gas Outburst Accidents in China

    By Ming Ju Liu

    China has been suffering from the most serious coal and gas outburst accidents. The situation has become worse than ever with the mining of deeper coal seams at higher production rates in a more compl

    Jan 1, 2008

  • SME-ICGCM
    Five Stress Factors Conducive To Bumps In Utah, USA, Coal Mines

    By Joe F. T. Agapito

    High stresses and adverse geology in deep coal mines in the state of Utah, USA, have caused numerous bumps. The larger bumps have been associated with seismic events with Richter magnitudes of 3.6 and

    Jan 1, 2000

  • SME-ICGCM
    Behavior of Welded Wire Mesh Used for Skin Control in Underground Coal Mines

    By Murali M. Gadde

    Welded wire mesh is the most commonly used skin control technique in the United States underground coal mines. Currently, selection of the mesh is based on trial and error rather than any rigorous des

    Jan 1, 2006

  • SME-ICGCM
    Post?Collapse Seismicity of the Crandall Canyon Mine Using Double Difference Relocations

    By Tex M. Kubacki

    In 2007, the University of Utah Seismograph Stations (UUSS) temporarily expanded its seismic monitoring network in Emery County, Utah, in response to the August 6 Crandall Canyon mine collapse that tr

    Jan 1, 2012

  • SME-ICGCM
    Detection of Abandoned Mines and Air Passages/Burning Centers of Mine Fires by Combined Electromagnetic Method

    By Shu Yan

    The high resolution resistivity method (HRRM) is developed specifically for detecting underground cavities and tunnels. HRRM has a special feature in that it can recognize and cancel static shift, whi

    Jan 1, 2005

  • SME-ICGCM
    Destressing Practice In Rockburst-Prone Ground

    By J. Willan

    This paper addresses the problem of designing a destress blasting procedure to reduce the incidence of rockbursting in hard rock mines. A review is made of the developed theory and practice of destres

    Jan 1, 1984

  • SME-ICGCM
    Recent Developments in Pre-driven Recovery Road Design

    By Rob Thomas

    Pre-driven recovery roads are used to speed up the longwall recovery process by reducing bolt-up requirements and by improving ground conditions on the face during the removal of the powered supports.

    Jan 1, 2008

  • SME-ICGCM
    Comparison of the Performance of Active and Passive Roof Bolts in An Illinois Basin Coal Mine

    By Anil K. Ray

    This paper discusses in situ studies conducted at an Illinois Basin room-and-pillar coal mine to evaluate the performances of three different types of bolts under similar geologic conditions. The bolt

    Jan 1, 2012

  • SME-ICGCM
    Catastrophic Failures of Underground Evaporite Mines

    By Jeff Whyatt

    Deformation of underground salt, trona and potash mines is generally time dependent, providing for gradual adjustment of strata to mining induced stresses. Time dependence can allow for higher extract

    Jan 1, 2008

  • SME-ICGCM
    Innovation in Rock Mechanics: Iced Tailings As Structural Backfill for the Citronen Mine, Ironbark Zinc Ltd., Greenland

    By Andrew P. Schissler

    The Citronen Zinc-Lead Project is one of the world?s largest undeveloped zinc-lead resources, containing more than 13 billion pounds of zinc and lead metal. The project is located in northern Greenlan

    Jan 1, 2012

  • SME-ICGCM
    Load Capacity and Bond Behavior of Resin Grouted Rock Bolts

    By Nic Slatalla

    Resin anchored rock bolts are an effective tool to control the deformation of an underground opening because they combine high support capacity with fast installation. However, there are still numerou

    Jan 1, 2006

  • SME-ICGCM
    Gate Entry Design For Longwalls Using The Coal Mine Roof Rating

    By Chris Mark

    Successful longwall mining requires a stable tailgate entry. Gate entry performance is influenced by a number of geotechnical and design factors, including: - Pillar size and pillar loading; - Ro

    Jan 1, 1993

  • SME-ICGCM
    Overburden Subsidence Characteristics When Mining in Weak Rocks and Subject to Special Mining Conditions

    By Wenquan Zhang

    Based on the mining and geological conditions of Wadong Mine, Longkou City, Shandong Province, China, a viscoelastic model with proper creep parameters was established. The 3-D ANSYS was used to simul

    Jan 1, 2006

  • SME-ICGCM
    A Practical Solution to Highwall Mining Coal Reserves Sterilized by Auger Mining

    By Michael Amick

    Over the last few years as the coal industry has seen an increase in the price of coal, a renewed interest in the additional mining of pre-law highwall sites has occurred. Much premium coal and pro

    Jan 1, 2007

  • SME-ICGCM
    Roadway Strata Management in the New South Wales Underground Coal Mining Industry

    By Rob Thomas

    Strata management is a critical and now necessary requirement in the New South Wales underground coal mining industry. As a formal and structured process, strata management allows ground supp

    Jan 1, 2007

  • SME-ICGCM
    Planning And Design For Barrier Pillar Recovery Three Case Histories

    By David A. Newman

    Barrier pillars created during mine development provide additional reserves during mine closure and can be the sole access to reserves previously abandoned because of mining height or out of seam dilu

    Jan 1, 1995