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  • SME-ICGCM
    Cross Well Acoustic Tomography To Locate Abandoned Underground Mines And Subsidence Failure

    By Linda K. Killoran

    The U.S. Bureau of Mines has developed a prototype cross well acoustic logging system and complementary tomographic image reconstruction software for the detection and delineation of abandoned undergr

    Jan 1, 1992

  • SME-ICGCM
    Stability Evaluation Of Alternative Designs Of Drift-And-Fill Stoping In Zhaoyuan Gold Mine, P. R. China

    By Xianming Zhou

    Mining economics is such that too conservative in safety will result in a considerable penalty in mining cost. However, initial planning and design of a mining project often must be done without compl

    Jan 1, 1989

  • SME-ICGCM
    Entry Design For Optimum Stability In A Multi-Seam Environment

    By Mohummad Akram

    Statistical analysis of multi-seam mining case studies demonstrated that geologic structure and lithological type and sequencing were predominant factors in entry failures. Finite element analysis was

    Jan 1, 1993

  • SME-ICGCM
    GIS Supported Evaluation of Surface Level Impacts Due to Abandoned Near?Surface Mine Locations

    By Alexander Kattner

    Surface fractures in urbanized areas show the risk potential of near-surface mining. This kind of mining subsidence damage occurs mainly in areas where hard coal was mined near the surface with very l

    Jan 1, 2011

  • SME-ICGCM
    An Investigation of the Causes of Cutter Roof Failure in a Central Pennsylvania Coal Mine: A Case Study

    By John L. Hill

    Cutter roof failure is a specific type of ground control problem which frequently results in massive roof failure. It is a cannon occurrence in coal mines of the Northern Appalachian Coal Sasin, causi

    Jan 1, 1984

  • SME-ICGCM
    Integrity Factor Approach to Assess the Stability of Room-and-Pillar Mines

    By Kanaan Hanna

    The integrity factor approach was developed by the Bureau of nines to assess the stability of mine pillars and has been applied primarily to longwall chain pillars. Recently this approach was applied

    Jan 1, 1988

  • SME-ICGCM
    Microcirculation Theory Analysis Of Spontaneous Combustion Of Loosing Coal In The Top-Coal Caving Region Of Entry

    By Q. F. Wang

    Spontaneous combustion hazard of loose coal in the top-coal caving region of entry affects the safety of the entry and top- caving longwall face seriously. In this paper, by combining on- site tempera

    Jan 1, 2004

  • SME-ICGCM
    Long-term Subsidence Over Longwall Chain Pillar Systems and Its Effects on Surface Structures

    By Yi You

    A research has been conducted to study the long-term subsidence and its possible effects on surface structures In this research, the surface movements in areas when potential for developing long-term

    Jan 1, 1997

  • SME-ICGCM
    Some Structural Aspects Of Designing The Shield Supports

    By S. S. Peng

    This paper presents a convenient way for the preliminary design of the shield supports. The locus equations which are applicable for all kids of shield supports are derived. These equations facilitate

    Jan 1, 1982

  • SME-ICGCM
    Entry Stability Monitoring & Analysis For Longwall & Continuous Mining Systems

    By Wm. Mark Hart

    Under a specific geological condition, roof supporting method, and pillar-entry system, an entry convergence concept may be the most effective means that can be used to effectively indicate the longwa

    Jan 1, 1995

  • SME-ICGCM
    Effect of the Approaching Longwall Faces on Barrier and Entry Stability

    By Klaus-Dieter Beck

    RAG American Coal Holding, Inc. affiliates operate two longwall mines in the Pittsburg seam in Pennsylvania, the Cumberland mine and the Emerald mine. A unique situation in longwall operation occurred

    Jan 1, 2004

  • SME-ICGCM
    Ground Control Techniques Utilizing Polymer Grid Structures (6a308b5b-e28a-436d-9aed-f102a6943d1b)

    By Brian E. Travis

    Lightweight polymer grids have recently been introduced to the mining industry. They are currently being used for roof and rib control, longwall shield recovery, safety guarding or barricade, highwall

    Jan 1, 1992

  • SME-ICGCM
    Delineation Of Abandoned Workings With An In-Seam Seismic Method

    By I. Geldmacher

    In-Seam Seismic (ISS) methods have been used extensively worldwide for the past 10 years to assist mine planning, espe¬cially longwall mining in coal seams. The technique is only starting to gain wide

    Jan 1, 1990

  • SME-ICGCM
    Development Of A Resin Point Anchor

    By Richard R. Wilding

    The United States Coal Mining Indus- try had the opportunity to greatly improve their roof control techniques during the nineteen seventies by the use of fully grouted resin roof bolts. This new tool

    Jan 1, 1981

  • SME-ICGCM
    Drivage System In Retreat Longwall Gateroad

    By Kikuo Matsui

    In a difficult economic environment, the coal mines in Japan have been making extensive efforts in order to survive by rationalizing the mining operations. Introduction of a new longwall mining system

    Jan 1, 1995

  • SME-ICGCM
    Seepage and Reinforcement Behavior of Grouting Into Slaking-Prone Mine Tunnel Floor

    By Hideki Shimada

    In underground coal mines, grouting method is employed in order to reinforce the floor and to control the movement of groundwater into the roadway. However, the seepage and the reinforcement behavior

    Jan 1, 2002

  • SME-ICGCM
    Portal Stability In Rock

    By G. K. Rogers

    Portals, which are the surface entrances to underground excavations, are frequently overlooked and often difficult areas In terms of ground control. Failures commonly occur In the typically high angle

    Jan 1, 1988

  • SME-ICGCM
    Optimisation Of Reinforcement Design Of Coal Mine Roadways (ef04df4d-16ce-4e1d-9fd1-73fd46706558)

    By Winton J. Gale

    The design of the reinforcement systems required to stabilise mine roadways has developed through the application of field measurement techniques. These techniques have allowed the level of security o

    Jan 1, 1992

  • SME-ICGCM
    A Simple Finite Element Model For Predicting The Behaviour Of Hydraulically Powered Coalmine Supports

    By Brian G. D. Smart

    A scheme is presented whereby the complexities of design and operation of a hydraulically powered coalmine support are modelled using the finite element method. This enables predictions to be made of

    Jan 1, 1992

  • SME-ICGCM
    Rock Mechanics Study Of Lateral Destressing For The Advance-And-Relieve Mining Method (2bf3b56c-1393-4658-a2e4-6e9ace0d24dd)

    By Hamid Maleki

    The advance-and-relieve method benefits from lateral destressing associated with mining in laminated rocks and a high horizontal stress regime. This stress control method is based on measurements show

    Jan 1, 2003