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  • SME-ICGCM
    Numerical Modeling as a Tool to Predict Pillar Condition and Assist in Mining Sequencing

    By P. Palmer

    Using 3D numerical modeling as a tool to predict rock behavior during mining extraction is still an uncommon practice at many underground operations. This paper will discuss how 3D numerical models we

    Jan 1, 2005

  • SME-ICGCM
    BHP Billiton Underground Ground Control Fatal Risk Control Protocol ? Development and Application

    By Dan Payne

    Roof falls and other ground control incidents make up a significant portion of fatal accidents in underground mines. BHP Billiton has undergone a review of all fatalities in their operations and divid

    Jan 1, 2006

  • SME-ICGCM
    Roadway Supporting Technology Applied to Very Soft Coal Seam at Yanlong Mining Area in China

    By Sheng Zhang

    The compressive strength of coal in Yanlong mine area of China is less than 3 MPa. Basically, it is powdery. The roof and floor rocks are mudstone. Therefore this coal seam is a typical ?three soft? c

    Jan 1, 2013

  • SME-ICGCM
    Impacts of Longwall Mining on Hydrology, Soil Moisture, and Tree Health in Belmont County, Ohio

    By David Bartsch

    The Ohio Valley Coal Company (Ohio Valley) has operated the Powhatan No. 6 Mine in Belmont County, Ohio since 1972. Ohio University owns a 455-acre research farm over a portion of the Ohio Valley rese

    Jan 1, 2005

  • SME-ICGCM
    Analysis of Coal Pillar Stability (ACPS): A New Generation of Pillar Design Software

    By Zach Agioutantis, Christopher Mark

    "Thirty years ago, the Analysis of Longwall Pillar Stability (ALPS) inaugurated a new era in coal pillar design. ALPS was the first empirical pillar design technique to consider the abutment loads tha

    Jan 1, 2018

  • SME-ICGCM
    Determination of Load Transfer Characteristics of Gloved Resin Bolts from Laboratory and In Situ Field Testing

    By Dion Pastars

    Resin based grouts are the main form of rock bolt anchorage in the underground coal industry in Australia and New Zealand. To be effective, the system requires the mixing of the catalyst and mastic co

    Jan 1, 2005

  • SME-ICGCM
    Development of the Laboratory Short Encapsulation Pull Test for a Revised British Standard on Rock Reinforcement Components Used in Coal Mining

    By D. Bigby

    The current British Standard on rock reinforcement components used in coal mining (BS7861:1996) employs the axial double embedment tensile PET) test to determine the main system load transfer performa

    Jan 1, 2005

  • SME-ICGCM
    Modeling the Arc-effect of a Coal Mine Roof

    By André C. Zingano

    The domino effect in a violent pillar collapse occurs due to the redistribution of stress in the remaining pillars near the collapse, and this stress transfer occurs in the immediate and main roofs. T

    Jan 1, 2005

  • SME-ICGCM
    An Alternative To A Manual Torque Check On Roof Bolts

    By Joseph A. Cybulski

    In response to the mining of reserves with increasingly adverse round conditions and the roof support recommendations of current rock mechanics theories, roof support systems have continued to improve

    Jan 1, 1990

  • SME-ICGCM
    Preventing Roof Fall Accidents - An Operation's Approach

    By Joe Zelanko

    In order to prevent roof fall accidents and injuries, U.S. underground coal mine operators must develop and implement effective roof control strategies. Various tools are available to assist engineers

    Jan 1, 2011

  • SME-ICGCM
    Stability Analyses and Remediation of Two Mined?Out Coal Seams Adjacent to a Building

    By Gennaro G. Marino

    As part of the development of a shopping center in West Virginia, a significant bench had to be cut into a mountainside that was over 700 ft. high. As a result, a steeply stepped, over 400-ft.- high w

    Jan 1, 2013

  • SME-ICGCM
    Test Method for Assessing Water Degradation Potential of Coal Measure Rocks for Analyses of Floor, Roof, and Ribs

    By G. J. Hasenfus

    There are no known published methods of estimating the degradation of coal measure rocks by water that are simple and efficient, yet still provide a quantitative, meaningful value for assessing the st

    Jan 1, 2005

  • SME-ICGCM
    Development of CAN Manipulator

    By Brian E. Perrine

    Underground mining requires a variety of specialized equipment. With ever-changing mining conditions and methods, some mines have had to resort to purchasing existing industrial equipment and adapting

    Jan 1, 2013

  • SME-ICGCM
    Geotechnical Strata Characterisation Using Geophysical Borehole Logs

    By Terry Medhurst

    Geophysical logging is routinely undertaken as part of most Australian coal mining exploration programs. Typically, the main application is the determination of coal seam depth and the qualitative est

    Jan 1, 2005

  • SME-ICGCM
    A Method for Quantitative Void/Fracture Detection and Estimation of Rock Strength for Underground Mine Roof

    By Syd Peng

    In designing a proper roof support system, one must know the features of roof geology in advance of mining. The drilling parameters obtained during normal roof bolt installation cycle can provide a l

    Jan 1, 2005

  • SME-ICGCM
    Definition of Ultra-close Multiple-seams and its Ground Pressure Behavior

    By Baisheng Zhang

    The definition of Ultra-close multiple seams as defined by the floor disturbance depth, h, due to mining in the upper seam is proposed: it refers to those coal seams that are spaced very closely, i.e.

    Jan 1, 2005

  • SME-ICGCM
    Development of a Laboratory Facility for Testing Shear Performance of Installed Rock Reinforcement Tendons

    By L. Mahony

    This paper describes the design, construction and commissioning testing program for a laboratory facility at the School of Mining Engineering, UNSW, Australia, aimed at evaluating reinforcement tendon

    Jan 1, 2005

  • SME-ICGCM
    Stability Mapping System

    By Quanxi Wang

    This paper presents a new stability mapping system which tightly integrates structural and geologic mapping with geo- mechanical stress analysis for use in support design and mine plan- ning. The stru

    Jan 1, 2005

  • SME-ICGCM
    Improved Pull out Strength of Fully Grouted Roof Bolts through Hole Geometry Modification

    By Luis Giraldo

    Rock bolt installation characteristics near roof falls have been identified as contributing to failure. One documented and regularly occurring failure mechanism is loss of anchorage between the grout

    Jan 1, 2005

  • SME-ICGCM
    Analysis of Entry Stability Associated with Multi-seam Mining - A Case Study

    By Jisheng Han

    Interaction effect exists when two or more neighboring seams are mined. The mining activity in one seam causes stress redistribution and strata movement in both the roof and floor. When the thickness

    Jan 1, 2005