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  • SME-ICGCM
    Multiple Seam Mining Interactions: Case Histories from the Harris No. 1 Mine (b50cab1b-ba36-4377-a652-1d452c62f433)

    By Frank E. Chase

    The Harris No. 1 Mine, located in Boone County, WV, has been longwalling the Eagle Coalbed for over 30 years. Harris has experienced numerous interactions associated with the extensive room-and-pillar

    Jan 1, 2005

  • SME-ICGCM
    Geologic Conditions Affecting Mineability in the Jane Mine.

    By Stephen J. Harven

    Geologic conditions in eight northern operating sections of Jane Mine, Keystone Coal Mining Complex. Armstrong County, Pennsylvania are defined by utilizing drillhole data and underground geologic map

    Jan 1, 1987

  • SME-ICGCM
    Application Of Short-Term Time-Dependent Plate Loading Tests For Estimation Of In-Situ Elastic And Viscous Parameters Of Weak Floor Strata

    By Gang Chen

    This paper explores the possibility of using short-term time-dependent plate loading tests to estimate the elastic and viscoelastic parameters of the weak floor strata typically associated with coal s

    Jan 1, 1990

  • SME-ICGCM
    Catastrophic Collapse Of Highwall Web Pillars And Preventative Design Measures

    By Karl Zipf

    In highwall mining, once a sufficient number of web pillars are developed, they can fail catastrophically in a domino-type failure, posing a safety hazard to highwall miners and sterilizing mineable r

    Jan 1, 1999

  • SME-ICGCM
    In-Situ Tests and Numerical Simulation about the Effect of Annulus Thickness on the Resin Mixture for Fully Grouted Resin Bolt

    By Andre Zingano

    The objective of this paper is to study the effect of annulus thickness on the quality of resin mixture for fully grouted resin bolt. Pullout and mixture tests were made in underground coal mines for

    Jan 1, 2008

  • SME-ICGCM
    Coal Pillar Life Prediction in the Vaal Basin, South Africa

    By J. Nielen van der Merwe

    This investigation was done to develop a method to predict the lie of coal pillars. It has long since been known that coal pillars deteriorate over time, but there was no method to quantify the deteri

    Jan 1, 1998

  • SME-ICGCM
    A Study On Stress Distribution And Reasonable Size Of Coal Pillar In A Coal Face

    By H. C. Li

    Mechanical models are established in accordance with the degree of mining on both sides of the coal pillar, and formulae were derived which calculated the superposition stress distribution and the wid

    Jan 1, 1992

  • SME-ICGCM
    Continuous Improvement In Cuttable Coal Rib Support In Australian Coal Mines

    By Ghassan Skybey

    Australian coal mines uses state of the art technology in coal rib reinforcement. This paper highlights the development over the past 15 years in coal rib support technology, along with the advantages

    Jan 1, 1995

  • SME-ICGCM
    A Roof Quality Index For Stone Mines Using Borescope Logging

    By John Ellenberger

    The National Institute for Occupational Safety and Health (NIOSH) has collected pillar and span data at 34 stone mines in 10 states to develop pillar and roof span design guidelines for underground st

    Jan 1, 2009

  • SME-ICGCM
    Load Capacity and Stiffness Characteristics of Screen Materials Used for Surface Control in Underground Coal Mines (10e0c7b9-c7f2-4fd8-a923-cd572692ebf6)

    By Dennis R. Dolinar

    Screen material in the form of welded wire mesh and geogrids are used in underground coal mines to prevent the fall of small pieces of rock from the roof between roof bolts. Further, if the screen is

    Jan 1, 2006

  • SME-ICGCM
    The Evolution of Intelligent Coal Pillar Design: 1981-2006 (550072c4-5cb4-4845-a20b-da35141e93d6)

    By Christopher Mark

    The first International Conference on Ground Control in Mining opened with the topic of pillar design. Two classic papers were presented, one by Bieniwski and the other by Wilson. Unfortunately, the

    Jan 1, 2006

  • SME-ICGCM
    Development of Low Profile Remote Roof Bolting Module

    By Bill Kyslinger

    In underground mining, machine design is predominantly dictated by mine conditions and individual customer desires. In partnership with Boart Longyear Poland and KGHM, J. H. Fletcher & Company was ta

    Jan 1, 2006

  • SME-ICGCM
    Control of Hard-to-Collapse Massive Roofs in Longwall Faces Using a Hydraulic Fracturing Technique

    By Hideki Shimando

    Periodic weighting and windblast which are caused by the dynamic effects of overburden in a longwall panel significantly affect longwall mining This study describes past experience with wind blast

    Jan 1, 1998

  • SME-ICGCM
    Why Uniaxial Compressive Strength and Young?s Modulus Are Potentially Poor Indicators of Roadway Roof Stability ? Except in the Tailgate

    By Russell Frith

    For many years, underground rock mechanics and in particular, roadway/tunnel roof stability has been underpinned by the often unchallenged assumption that roof strength (as defined by the UCS) and sti

    Jan 1, 2006

  • SME-ICGCM
    Design and Performance of a Longwall Coal Mine Water-Barrier Pillar

    By Francis Kendorski

    The Skyline #3 Mine of Canyon Fuel Company in Utah was planning longwall mine development adjacent to and downdip of older mine workings known to be flooded. Barrier pillar geometries and widths were

    Jan 1, 2007

  • SME-ICGCM
    Potential Of A Void Diffusion Model To Predict Longwall Subsidence In The Illinois Coal Basin

    In this paper, the authors attempt to apply a simplified non-homogeneous void diffusion model (NHVDM) to predict surface subsidence for longwall mining in Illinois. A generalized error function subsid

    Jan 1, 1990

  • SME-ICGCM
    Roof Screening for Underground Coal Mines: Recent Developments (45f180e8-0601-41d7-bc8b-2e9de87bd46d)

    By Craig Compton

    Falls of small pieces of rock from between roof bolts continue to cause fatalities and to injure hundreds of coal miners each year. Roof screen is the most effective way to prevent these incidents,

    Jan 1, 2007

  • SME-ICGCM
    Applied Geomechanics for Support Design in German Deep Coal Mines

    By Holger Witthaus

    Beside the traditional geomechanical evaluation methods the geotechnical parameters are recognized as important facts of the planning work for multiple seam mining. Standards for applied monitoring an

    Jan 1, 2006

  • SME-ICGCM
    Introduction of Long, High Capacity, Highly Tensioned, Post- Grouted Cable Bolts at BHP Billiton?s San Juan Mine,

    By James Pile

    Long, high capacity, highly tensioned, cable bolts (strand bolts), stiff enough to be installed with resin like a solid bolt, yet flexible enough to be used in any lengths, have been widely used in

    Jan 1, 2007

  • SME-ICGCM
    A First Step in Developing Standing Roof Support Design Criteria Based on Ground Reaction Data for Pittsburgh Seam Longwall Tailgate Support

    By Thomas Barczak

    Roof support systems are designed for roof control to prevent unplanned falls. It sounds logical and has been the conventional thinking in support design since supports were first installed. In orde

    Jan 1, 2008