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  • SME-ICGCM
    Surface Subsidence. in Longwall Mining--A Case Stud

    By R. D. Yancich

    A case study of longwall mining surface subsidence was performed at a mine in Southwestern Pennsylvania. The mine operated in the Pittsburgh coal seam which averaged 70-72 inches with 6-8 inches draw

    Jan 1, 1984

  • SME-ICGCM
    Subsidence Misconceptions And Myths

    By Richard E. Gray

    Subsidence due to coal mining is poorly understood by non-specialists. This has led to numerous misconceptions and myths based on limited observations and lack of knowledge. The three most common are:

    Jan 1, 1996

  • SME-ICGCM
    Comparison of the Performance of Active and Passive Roof Bolts in An Illinois Basin Coal Mine

    By Anil K. Ray

    This paper discusses in situ studies conducted at an Illinois Basin room-and-pillar coal mine to evaluate the performances of three different types of bolts under similar geologic conditions. The bolt

    Jan 1, 2012

  • SME-ICGCM
    Advancements in the Use of High-Modulus Polymer Mining Grids to Speed Longwall Recovery

    By Thomas A. Bailey

    Since the advent of longwall mining, various methods and materials have been used during relocation to control the intrusion of the gob in the shield/panline area. (figure 1) Controlling this gob is c

    Jan 1, 2006

  • SME-ICGCM
    Electrical Measurements of Coal Measure Rocks for Electromagnetic Applications in Mining Industry

    By Nikolay Boykov

    Subsurface imaging technologies are part of the electromagnetic (EM) geophysical methods. EM technologies such as radio imaging method (RIM), ground penetrating radar (GPR), and drill string radar (DS

    Jan 1, 2006

  • SME-ICGCM
    Innovation in Rock Mechanics: Iced Tailings As Structural Backfill for the Citronen Mine, Ironbark Zinc Ltd., Greenland

    By Andrew P. Schissler

    The Citronen Zinc-Lead Project is one of the world?s largest undeveloped zinc-lead resources, containing more than 13 billion pounds of zinc and lead metal. The project is located in northern Greenlan

    Jan 1, 2012

  • SME-ICGCM
    Characteristics of Coal Bursts in the North Fork Valley of the Gunnison River Valley, Colorado

    By Christopher Mark

    A coal burst is defined as the sudden, violent ejection of coal or rock into a mine opening. Coal mines in the North Fork Valley (NFV) of Colorado?s Gunnison River have a long history of coal bursts i

    Jan 1, 2012

  • SME-ICGCM
    Seismic Studies Over Active Longwall Mines

    By Thomas H. Wilson

    Common offset and refraction seismic data have been collected over four longwall panels at two different locations within West Virginia. Surveys prior, during and after mining were made in both areas.

    Jan 1, 1988

  • SME-ICGCM
    Cost Preventive System To Control Unstable Roof In Main Line Haulage Entries

    By John Popovich

    The MICON RokLok binder system including component and consolidation processes and safety and its first aide are described. The implementation procedures and selection of injection parameters are disc

    Jan 1, 2001

  • SME-ICGCM
    Behavior of Welded Wire Mesh Used for Skin Control in Underground Coal Mines

    By Murali M. Gadde

    Welded wire mesh is the most commonly used skin control technique in the United States underground coal mines. Currently, selection of the mesh is based on trial and error rather than any rigorous des

    Jan 1, 2006

  • SME-ICGCM
    The Design And Selection Of Powered Supports For Application In 4.5 Metre Extraction At Daw Mill Colliery

    By Clive Chadbourne

    Investigations of world wide coal face strata control practice, the study of theoretical calculations and detailed engineering analysis have been combined to design and select a powered roof support s

    Jan 1, 1994

  • SME-ICGCM
    Relationship between the clay fabric of roof shales and roof collapse in mines of the Herrin cod, southern Illinois

    By Theresa M. Bodus

    The strength of roof shales is, in part, a function of the preferred orientation of clay minerals within them. Therefore, analysis of clay fabric under both air-dried and hydrated conditions should be

    Jan 1, 1989

  • SME-ICGCM
    The Extraction of Main Heading Pillars with a Longwall at Nre Wongawilli Colliery

    By Ry Stone

    To maintain longwall continuity, NRE Wongawilli Colliery extracted the approximately 20-year-old Thompson Mains and in doing so, 20 roadways were holed into during longwall retreat. The orientation of

    Jan 1, 2012

  • SME-ICGCM
    Nonlinear Approach For Determining Design Criteria For Yield Pillar Performance

    By W. Smith

    The U.S. Bureau of Mines (USBM) is using laboratory and computer-based techniques to investigate the post- failure behavior of yielding pillars and pillar reinforcement techniques to control entry def

    Jan 1, 1995

  • SME-ICGCM
    Pillar Design Issues For Underground Stone Mines (5c6602ba-4b85-4ec3-ad15-c1c321c1afcd)

    By A. T. Iannacchione

    Underground stone mining represents an emerging sector for the U.S. mining industry. As this expansion takes mines under deeper cover and as more efficient mining methods are utilized, adequate stone

    Jan 1, 1999

  • SME-ICGCM
    Think Like a Roof Bolt ? Then Make It Scream ?

    By Greg Smith

    This paper documents the use of bench testing equipment developed to enhance the understanding of, and improve upon, common roof bolt support systems. Most roof bolt systems consist of components that

    Jan 1, 2012

  • SME-ICGCM
    Roadway Strata Management in the New South Wales Underground Coal Mining Industry

    By Rob Thomas

    Strata management is a critical and now necessary requirement in the New South Wales underground coal mining industry. As a formal and structured process, strata management allows ground supp

    Jan 1, 2007

  • SME-ICGCM
    Optimizing Pillar Design In A Multi-Seam Environment

    By R. Kanniganti

    The primary problems of pillar design in seams subject to interaction are due not only to difficulties in predicting loading, but also to the often unsymmetrical nature of the stress fields. The effec

    Jan 1, 1995

  • SME-ICGCM
    Beyond Coalbrook: Critical Review of Coal Strata Control Developments in South Africa

    By J. Nielen van der Merwe

    Rock engineering research and technology development in South Africa only received serious attention in reaction to the Coalbrook disaster in 1960. At the time, a number of gaps in knowledge of rock r

    Jan 1, 2006

  • SME-ICGCM
    Three-Seam Interaction: A Case Study

    By N. P. Kripakov

    Results of a complex three-seam interaction analysis in a western U.S. coal mine are presented. The physical situation simulated by the models represents the development of a set of entries underneath

    Jan 1, 1996