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  • SME-ICGCM
    The Use Of Rim- To Detect Geologic Anomalies In The Clarion Seam

    By M. Craig Miller

    As the trend continues in the U. S. toward inceased capital investment in longwall mining equipment and wider panels. the risk also increases for gotential financial and production loses due to undete

    Jan 1, 1990

  • SME-ICGCM
    The Response Of A High Order Stream To Shallow Cover Longwall Mining In The Northern Appalachian Coalfield

    By John A. Owsiany

    The effect of longwall mining on streams and shallow aquifers has been the subject of numerous research studies for more than twenty years. As a result of these studies, it has become common to consid

    Jan 1, 2001

  • SME-ICGCM
    Transitional Geology and Its Effects on Development and Longwall Mining in Pittsburgh Seam

    By Jun Lu, Mark Van Dyke, Daniel W. H. Su, Greg Hasenfus

    "This paper presents the geologic and ground control challenges that were encountered by CONSOL Energy’s mining operations in southwestern Pennsylvania. A sandstone-to-limestone geology transition was

    Jan 1, 2015

  • SME-ICGCM
    Direct Laboratory Tensile Testing Of Select Yielding Rock Bolt Systems

    By John D. VandeKraats

    Yielding rock bolt support systems have been developed to accommodate ground movement in shifting ground such as in coal operations; in creeping ground such as salt, trona, and potash; and in swelling

    Jan 1, 1996

  • SME-ICGCM
    Numerical simulation of coal pillar loading with the aid of a strain-softening finite difference model

    By A. T. Iannacchione

    Numerical simulation of coal pi1lar loading has traditionally been a difficult task due to the unique and highly variable properties of coal and the inability of numerical procedures to duplicate thes

    Jan 1, 1989

  • SME-ICGCM
    Letter Of Nomination - 26th International Conference on Ground Control in Mining

    By Christopher Mark

    Dr. Christopher Mark serves as Team Leader of the Rock Mechanics Section in the Rock Safety Engineering Branch of the NIOSH - Pittsburgh Research Laboratory. In this position he leads a multi-discipl

    Jan 1, 2007

  • SME-ICGCM
    An analysis of roof-pillar-weak floor interaction in partial extraction room-and-pillar mining

    By W. M. Pytel

    The applicability of the beam theory in analysis of roof- pillar-weak floor interaction in partial extraction room-and-pillar mining is presented. The mine structure is modeled as an equivalent multi-

    Jan 1, 1989

  • SME-ICGCM
    Support selection of mine roadways by means of a computer program

    By Erdal Ünal

    The computer program introduced in this paper is based on design guidelines developed for selection of support systems used in mine roadways. The support types considered include rock bolts as well as

    Jan 1, 1989

  • SME-ICGCM
    Design Methods To Control Violent Pillar Failures In Room-And-Pillar Mines (V. S. Bureau of Mines)

    By R. Karl Zipf

    The sudden, violent collapse of large areas of room-and-pillar mines poses a special hazard to miners and mine operators. This type of failure, termed a "Cascading Pillar Failure" (CPF), occurs when o

    Jan 1, 1996

  • SME-ICGCM
    Subsidence monitoring at a shallow partial extraction room-and-pillar mine in midwestem United State

    By Yoginder P. Chugh

    Subsidence may be observed above partial extraction shallow room-and-pillar mines where the coal seam(s) is associated with weak and thick claystone in the floor. This paper presents results of subsid

    Jan 1, 1989

  • SME-ICGCM
    Monitoring Mobile Roof Supports

    By Kenneth E. Hay

    Researchers from the U.S. Bureau of Mines conducted a field study to assess the safety of remotely controlled mobile roof supports (MRS) in a retreat pillar mining operation, Data were collected to pr

    Jan 1, 1995

  • SME-ICGCM
    Weightings And Water Inflows During Longwall Working

    By I. W. Farmer

    Weightings and water inflows into longwall workings often occur together, giving rise to discussions on their relative genesis. Case histories are introduced which indicate that most water inflows are

    Jan 1, 1996

  • SME-ICGCM
    Engineering Classification of Shales

    By Robert A. Siokler

    Approximately 75 percentage of the earth's land surface is comprised of shale or shale-like materials. Shale itself is composed of the residue from an almost infinite variety of weathered parent

    Jan 1, 1986

  • SME-ICGCM
    On Research Needs in Coal Mine Ground Control

    By Syd Peng

    "As the International Conference on Ground Control in Mining (ICGCM) enters its 35th year in 2015, it is time to look back and identify the areas that need to be emphasized and to look forward to see

    Jan 1, 2015

  • SME-ICGCM
    Analysis Of Multiple-Seam Interaction In A Bump-Prone Western Coal Mine Using MULSIM/PC

    By D. A. Donato

    It is often necessary for a mining company to extract coal from a seam underlying a previously mined coal seam. The impact of the overlying mine workings on the stress distribution within the underlyi

    Jan 1, 1996

  • SME-ICGCM
    Direct determination of failure surfaces in earth slopes

    By S. L. Huang

    The location and shape of potential failure surfaces in soil slopes were directly determined based on the stresses induced in the soil mass and the strength of the soil itself. Stress calculations wer

    Jan 1, 1989

  • SME-ICGCM
    Major Hazard Risk Assessment Applied To Pillar Recovery Operations (ad413764-c947-4465-9ec3-62ea91281168)

    By A. T. Iannacchione

    Recent fatal injuries occurring during pillar retreat coal mining call for better identification of the hazards and recognition of risks. Ground control hazards associated with room-and-pillar retrea

    Jan 1, 2009

  • SME-ICGCM
    Comparison Of Empirical, Analytical, And Numerical Methods Of Pillar Design And The Development Of A Site Specific Pillar Formula

    By Vincent A. Scovazzo

    Many accepted and useful methods have been developed and used for pillar design. Each method has its own particular strengths and weaknesses. Three methods addressed in this paper are; empirical, anal

    Jan 1, 1995

  • SME-ICGCM
    In-Situ Performance Analysis Of Immediate Forward Support (IFS) Systems In Thin-Medium Seam Sections In The United Kingdom

    By Paul N. Freeman

    This paper describes the in-situ performance of two IFS powered support installations at Betws and Penallta Collieries in the South Wales Coalfield, United Kingdom. Intensive monitoring of all powe

    Jan 1, 1992

  • SME-ICGCM
    Front abutment effects on supplemental support in predriven longwall equipment recovery rooms

    By Jeffrey M. Listak

    This report describes a study, conducted jointly by BethEnergy Mines Inc. and the Bureau of Mines, to assess the effects of longwall front abutment loading on various supplemental support materials u

    Jan 1, 1989