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  • SME-ICGCM
    Considerations Of Gas Outbursts In Using Dome Salt Mines For Storage Of Oil And Nuclear Waste

    By M. Ashraf Mahtab

    A feature of interest in stability of excavations in domal salt is the phenomenon of gas outbursts which has occurred in five of the six mines in Louisiana salt domes. Gas outbursts are sudden errupti

    Jan 1, 1981

  • SME-ICGCM
    Mathematical Modeling Of Strong Roof Beds In Longwall Mining

    By Xiaolin Wu

    Most coal bump occurrences in the U.S. are directly related to mining operations under strong roofs. An understanding of the behavior of bridging or cantilevering strong roofs over working longwall fa

    Jan 1, 1993

  • SME-ICGCM
    Laboratory Testing of Rib Straps

    By E. Bane Kroeger

    Rib failure is a hazard that has resulted in many injuries and fatalities in underground coal mines, especially in soft coal seams. Conventional rib control methods including rib boarding, shotcreting

    Jan 1, 2004

  • 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
    Effects of Bolt Spacing, Bolt Length, and Roof Span on Bolt Loading in a Trona Mine

    By Steve P. Signer

    Researchers from the Spokane Research Laboratory of the National Institute for Occupational Safety and Health installed 39 instrumented, fully grouted bolts at six test sites in a trona mine retreat p

    Jan 1, 2001

  • SME-ICGCM
    Determination of Effective Column Lengths for Resin-Grouted Roof Bolts

    By W. A. Cincilla

    The use of resin-grouted rock anchors continues to gain popularity in underground wall mines in the United States. It is estimated that during 1985, more than 30% and as many as 35% of all roof bolts

    Jan 1, 1986

  • SME-ICGCM
    Massive Pillar Failure--Two Case Studies

    By David H. Tang

    Similar massive pillar failures were observed in two underground coal mines with different configurations of mine workings and overburden depths. Finite element models were used to analyze the causes

    Jan 1, 1984

  • SME-ICGCM
    Geotechnical Planning and Development of the BHP Minerals San Juan Pilot Mine, Waterflow, NM

    By P. E. Christensen

    Due to ever-increasing stripping ratios associated with the No. 8 Seam at the San Juan Mine surface operation, BHP Minerals decided to implement longwall mining for the extraction of the substantial f

    Jan 1, 1998

  • SME-ICGCM
    Mining-Induced Stress Measurement With Hydraulic Borerole Pressure Cells

    By Paul A. Lu

    This paper proposes an unconventional, simple, and practical method of measuring mining-induced around stresses with hydraulic borehole pressure cells. The method is a direct ground stress measuring t

    Jan 1, 1984

  • SME-ICGCM
    Determination And IT-Supported Evaluation Of Rock Mechanical Parameters And Their Utilization During Application Of Roof Bolting Techniques

    By Nikolaos Polysos

    For the planning and driving of gateroads supported by roof bolts a practical concept has been developed in order to determine the geological and rock mechanical parameters derived from exploration dr

    Jan 1, 2001

  • SME-ICGCM
    Overview of Safety Considerations with Highwall Mining Operations

    By George Gardner

    The rapid growth of highwall mining in the Appalachian coalfields has resulted in unique safety concerns. Due to the concentration of activity at the base of the highwall and the potentially destabili

    Jan 1, 2002

  • SME-ICGCM
    Longwall Stability Analysis Of A Deep, Bump-Prone Western Coal Mine-Case Study

    By Lance R. Barron

    The U.S. Bureau of Mines, in cooperation with a central Utah coal .mine operator, began a study in July 1988 into longwall gateroad designs applicable to deep, bump- prone mine conditions. Prior to th

    Jan 1, 1990

  • 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
    Prevention. Control and Management of Coal and Gas Outbursts

    By Lu Jiam Zhang

    Coal and gas outburst is one of the serious natural disasters in the coal mines of China. Since 1950, more than 10,000 coal or gas outbursts have occurred in more than 200 underground coal mines of di

    Jan 1, 1987

  • SME-ICGCM
    Influence Of The Sloping Of Ground Surfaces On Mine Subsidence (165d3ebb-e4c1-4bc8-a5e4-409b4e24155c)

    By D. M. Shu

    A two-dimensional finite element modelling technique is applied to predict the subsidence movements on a sloping ground surface above a completely mined panel. The modelling is carried out for the sur

    Jan 1, 1992

  • SME-ICGCM
    How to Design an Efficient Roof Bolting Plan Based on Simple In-Mine Measurements

    By C. J. H. Brest van Kempen

    The techniques developed should provide a useful tool, not only during the initial formulation of a suitable bolting plan for a new section, but also for periodic check¬ing on the utilization factor

    Jan 1, 1986

  • SME-ICGCM
    Shear Bond Stresses Along Cable Bolts

    By Hani S. Mitri

    The behaviour of grouted cable bolts used for rock reinforcement as a means of ground control in hard rock mining is investigated. The study utilizes an analytical model which is based on the variatio

    Jan 1, 1990

  • SME-ICGCM
    Behavioral Aspects of Roof/Rib Injuries--Implications for Training Utilizing Stereoscopic Photography

    By Edward A. Barrett

    A significant number of injuries resulting from fa118 of roof and rib may be avoided by modifying the reactive behavior of miners as they encounter potentially hazardous ground conditions. In 1984-85,

    Jan 1, 1986

  • SME-ICGCM
    Assessment Of Applicability Of Strength Criteria For Rock And Rock Mass To Coal Pillars

    The applicability of four empirical strength criteria for rock masses, namely, Hoek and Brown, Bieniawski - Yudhbir et al., Rarnamurthy - Arora and Johnston - Sheorey et al. has been tested against th

    Jan 1, 1992

  • SME-ICGCM
    The Strong Outbursts of Coal and Gas in Coal Mines in China

    By S. N. Zhow

    China has at least 200 collieries suffering from the problem of instantaneous outbursts of coal and gas. The strong outbursts often occurred in active tectonic lanes and areas of high stress concentra

    Jan 1, 1987