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  • SME-ICGCM
    Pumpable Roof Supports: Developing Design Criteria by Measurement of the Ground Reaction Curve (8ba91e71-c09d-4bd5-afc0-848b526c152b)

    By Thomas Barczak

    Pumpable roof supports provide an alternative longwall tailgate roof support and have grown in usage during the past few years. Heintzmann Corporation has been installing pumpable roof supports at the

    Jan 1, 2003

  • SME-ICGCM
    Successful Application Of Hydraulic Fracturing To Control Windblast Hazard At Moonee Colliery, NSW, Australia

    By Ken Mills

    This paper describes the first successful use of hydraulic fracturing to induce caving events "on demand" in Australia. Moonee Colliery operate a longwall immediately below a thick conglomerate strata

    Jan 1, 2000

  • SME-ICGCM
    Use Of Polymer Grids For Longwall Shield Recovery

    By Brian E. Travis

    The recent development of polymer grids for the underground coal mining industry has created new alternatives for supplemental ground control practices. The grids utilize strong, lightweight polymers

    Jan 1, 1990

  • SME-ICGCM
    The Directional Drill Monitor For Long Hole Gas Drainage In Coal Mines (d6b87c76-5ad8-4cc5-b4ae-23b79c52c32b)

    By G. Skybey

    The Directional Drill Monitor (DDM) is an advanced instrument for real time in hole surveying. It was developed by Du Pont (Australia) to suit Australian gassy coal mining conditions. The instrumen

    Jan 1, 1992

  • SME-ICGCM
    Finite Element Modeling Of Subsidence Induced By Underground Coal Mining: The Influence Of Material Nonlinearity And Shearing Along Existing Planes Of Weakness

    By Daniel W. H. Su

    Surface subsidence induced by multiple-panel coal extraction was calculated with finite element stress analysis. The use of nonlinear material behavior and GAP elements, which provide a realistic repr

    Jan 1, 1990

  • SME-ICGCM
    Method Of Selecting Suitable Types Of Powered Supports At Longwall Faces

    By S. M. Hsiung

    A model (support selection model) for the selection of suitable types of powered supports under various geological conditions is proposed. This model is developed by evaluating the support, performanc

    Jan 1, 1988

  • SME-ICGCM
    Research on the Geological Dynamic Conditions and Forecast for Rock Bursts

    By Weihua Song, Hongwei Zhang, Feng Zhu, Sheng Li, Guoshui Tang

    "Rock burst is one of the most serious dynamic disasters in coal mining. Rock burst prevention involves two difficult tasks: systematically evaluating the occurrence conditions and effectively forecas

    Jan 1, 2015

  • SME-ICGCM
    Innovative Rock Reinforcement Hardware (a5497235-47bd-4c2e-8654-b4e79927169e)

    By D. F. Howarth

    Two innovative ground reinforcement products have been developed for use in the mining industry. One of these products is a high strength polyethylene (HOPE) bar for use as a rib bolt in underground c

    Jan 1, 1992

  • SME-ICGCM
    An Application Of Tree Classification Method In Analysis Of Longwall Shield Stability

    By Yong-Ming Jiang

    Longwall mining systems are extremely complex and expensive and require great caution for reliable and efficient operation. In many cases, ground control problems are the primary concern in longwall m

    Jan 1, 1993

  • SME-ICGCM
    Analysis And Field Testing Of Presupport Application In Coal Strata

    By J. D. Dizon

    Conventional strata control methods (i.e. roof bolts. cable trusses) are not always effective for ground control of very weak coal strata. An alternative method, termed presupport. is being investigat

    Jan 1, 1990

  • SME-ICGCM
    Manifestation Of Mine Pressure And Its Relations To Overlying Strata Movements

    By Z. C. Song

    [THIS PAPER WAS TRANSLATED FROM CHINESE TO ENGLISH BY S. S. PENG, WEST VIRGINIA UNIVERSITY] Immediately after coal extraction, the pressure that causes the movement of the surrounding strata is c

    Jan 1, 1982

  • SME-ICGCM
    The Development and Planning of Multiple Level Underground Limestone Mines

    By Bruce W. King, David A. Newman

    "Underground mines have always been an integral part of the limestone industry. However, beginning in the 1990s, the number of underground limestone mines has increased for many reasons including• Str

    Jan 1, 2016

  • SME-ICGCM
    The Use of NDT Methods to Determine the Condition of Rockbolt Support During the Recovery of a Previously Flooded Coal Mine Roadway at Thoresby Colliery

    By Brian Clifford

    Thoresby Colliery is in the process of recovering an old roadway that was flooded following the closure of an adjacent mine. The aim is to re-use the roadway as a gate road for a longwall retreat pane

    Jan 1, 2002

  • SME-ICGCM
    Yielding Cement Roof Supports for Longwall Mining

    By Alan A. Campoli

    Fosroc continues as a leader in the development of cementitious technology for the mining industry. The considerable expertise accumulated in the development of the Fm cement line has been employed in

    Jan 1, 1997

  • SME-ICGCM
    Theory and Technology of Mining Subsidence Control by Grouting the Overlying Strata Separations with Fine-Coal Ash

    By Yanfa Gao

    Abstract In order to control and reduce ground subsidence due to coal mining, and to protect building, railway and other surface construction, a new subsidence control method is proposed. Ground subsi

    Jan 1, 2002

  • SME-ICGCM
    Determination Of The Rock Strength From Portable Rock Tester

    By K. F. Unrug

    A new testing technique for the determination of the rock strength from portable rock tester is proposed. It is a quick and economical method that can determine the rock strength with reasonable accur

    Jan 1, 1990

  • SME-ICGCM
    Influence of joints on the elastic response of a LFUFL stope to FEM mining

    By W. G. Pariseau

    A new approach to the direct inclusion of the effects of joints and geologic structure in rock mechanics analyses is applied to an elastic analysis of stability of a Lucky Friday undercut and 4111 lon

    Jan 1, 1989

  • SME-ICGCM
    Prediction Of Rock Cutting Performance Using Fracture Mechanics Principles - A Review (0b1a12ed-9606-4d46-b68d-eea006d52e76)

    By Gexin Sun

    This paper overviews the recent research progress in predicting cutting performance using fracture mechanics principles. It is emphasised that rock fragmentation due to cutting is mainly a process of

    Jan 1, 1992

  • SME-ICGCM
    Assessment of the Dynamic Loads Effect on Underground Mines Supports

    By Kazem Oraee-Mirzamani

    Blasting operations generate seismic effects in underground mines. These effects apply additional dynamic loads on the support system, which should bear both static and dynamic loads. Static loads are

    Jan 1, 2011

  • SME-ICGCM
    Application of the Coal Mining Roof Rating System in South African Collieries

    This paper describes the experiences with the application of the Coal Mining Roof Rating (CMRR) System to South African strata conditions. Roof classification studies using the CMRR system were undert

    Jan 1, 2001