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  • SME-ICGCM
    Design Considerations For Bump-Prone Longwall Mines

    Tailgate pillar and tailgate-face corner humps have been a major threat to longwall coal mines where hump-prone conditions exist. The yield pillar design concept, in which the longwall chain pillars a

    Jan 1, 1999

  • 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
    The Search For A Method To Provide Warning Of Coal And Gas Outbursts

    By Fred Leighton

    Outbursts, or the sudden and sometimes catastrophic expulsion of coal and gas into the working area of a coal mine, are a little understood and growing problem. The AE/MS (Acoustic Emission/Microseism

    Jan 1, 1982

  • SME-ICGCM
    Progress In The Knowledge Of Granite Cutting With Diamond Wire (bf80b832-f557-4b46-b5c9-31193e67bf2d)

    By A. Bortolussi

    The paper discusses the state of the progress reached in the development of the diamond wire tool for cutting hard rocks. To the advances of this relatively new technology a substantial contribution h

    Jan 1, 1992

  • SME-ICGCM
    Impact Of Horizontal Load On Shield Supports

    By Thomas M. Barczak

    A theoretical evaluation of the impact of horizontal load on shield support capacity is made from a static rigid body analysis of the shield structure. Parameters affecting horizontal support resistan

    Jan 1, 1984

  • SME-ICGCM
    Design, Construction And Performance Of A Single Pass Lining For Soft Ground Coal Mine Tunnel Entries

    By Donald P. Richards

    West Elk Coal Company operates its Mt. Gunnison No. I mine on the western slope of the Rocky Mountains in Western Colorado. The mine is located along the north fork of the Gunnisson River near Somerse

    Jan 1, 1984

  • SME-ICGCM
    Engineering Methods For The Design And Employment Of Wood Cribs

    By Thomas M. Barczak

    Wood cribs are used extensively to stabilize mine openings by providing resistance to deflections of the immediate roof and floor and by supporting the weight of unstable rock masses. While the unit c

    Jan 1, 1993

  • SME-ICGCM
    Subsidence Prediction Influence Assessment and Damage Control

    By Y. Luo

    An extensive subsidence research program conducted by the authors has greatly improved the accuracy and the capabilities of subsidence prediction under complicated mining and surface conditions. The t

    Jan 1, 1997

  • 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
    Determination Of Rock Strength Properties Using Geophysical And Ultrasonic Logging In Exploration Drill Holes

    By John Feddock

    This study deals with underground mines and ground control and the prediction of seats strength characteristics based upon ultrasonic logging. Exploration drill holes, both rotary and core holes are u

    Jan 1, 2003

  • SME-ICGCM
    Thrust Bolting: A New Innovation In Coal Mine Roof Support

    By Stephen C. Tadolini

    A new innovation in coal mine roof support has been developed by the Bureau of Mines at the Denver Research Center. The technique, called "Thrust Bolting,"1 converts a traditional passive roof support

    Jan 1, 1990

  • SME-ICGCM
    Mining Under Rivers In Fuxin Coal Mines

    By Liang Yin-Huai

    In Fuxin Coal Mines, there are more than 20 million tons of coal buried under seasonal streams. The coal seams are mostly shallow. We have mined more then 50 mining blocks distributed in 5 coal mines.

    Jan 1, 1990

  • SME-ICGCM
    Analysis of Geologic and Geotechnical Conditions and Their Effects on Longwall Mining to Optimize Mine Planning at Shoal Creek Mine

    By Yong-Ming Jiang

    In cooperation with Cyprus Twentymile Coal Co., researchers from the National Institute for Occupational Safety and Health (NIOSI-I), Spokane Research Laboratory, conducted a study at the Foidel Creek

    Jan 1, 1998

  • SME-ICGCM
    Monitoring and Prediction of Ground Movements Above Underground Mines in the Eastern United States

    By M. Karmis

    mining factors and representative ground movement parameters. Based on this analysis, the previously developed prediction methods were modified and tested for their applicability in the Appalachian co

    Jan 1, 1987

  • SME-ICGCM
    Design Procedure for Arch Canopies for Rehabilitation of High-Roof-Fall Areas

    By Richard A. Allwes

    A procedure is presented for the design of an arch canopy for the application of rehabilitating a high-roof-fall area. This procedure is specifically developed for evaluating an unbackfllled arch cano

    Jan 1, 1986

  • SME-ICGCM
    Effect Of Face Advance Rates On The Characteristics Of Subsidence Processes Associated With U.S. And German Longwall Mining Operations

    By Yi Luo

    Regulating the face advance rate in longwall mining operation can be an effective means to reduce the disturbance potential to surface structures associated with a longwall subsidence process. However

    Jan 1, 2001

  • SME-ICGCM
    The Massive Collapse Of Coal Pillars - Case Histories From The United States

    By Frank E. Chase

    A massive pillar collapse occurs when undersized pillars fail and rapidly shed their load to adjacent pillars which in turn fail. This chain reaction-like failure may involve hundreds, even thousands,

    Jan 1, 1994

  • SME-ICGCM
    Improved Design Of Coal Pillars For U.S. Mining Conditions

    By Z. T. Bieniawski

    This paper presents the results of a survey of room and pillar dimensions and design practice in U.S. coal mines aimed at improving the design procedures in room and pillar mining. A review is given o

    Jan 1, 1981

  • SME-ICGCM
    Evaluation Of Surface Subsidence Potential Along A Pipeline Due To Abandoned Coal Mine Works

    By Thomas L. Vandergrift

    With the inevitable expansion of homes, businesses, and infrastructure in coal mining regions, the potential for future subsidence above abandoned mines is of increasing concern. Of particular concern

    Jan 1, 2000

  • SME-ICGCM
    Empirical and analytical design of large openings at a proposed national underground science laboratory

    By Karl Jr. Zipf

    The famous Homestake gold mine in Lead, SD. closed recently alter 125 years of operation. However, the mine may receive a new lease on life as a National Underground Science Laboratory (NUSL) supporte

    Jan 1, 2002