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  • SME-ICGCM
    Application Of Polyurethane Injection For Rehabilitation Of The Maingate Of A Deep Single Entry Longwall Mine

    By Kevin MacPherson

    After 34km of roof bolted drivage the first fall of ground occurred at the Phalen Colliery in the maingate of the 8th East longwall panel. The fall occurred over the stage loader as the wall approache

    Jan 1, 1999

  • SME-ICGCM
    The Impact Of Variability In Coal Strength On Mine Planning And Design - A Case History

    By David A. Newman

    Strength and physical property testing of coal is conducted regularly by the Arch Mineral Corporation as part of reserve exploration. Pillar design and mine layout are the primary applications for the

    Jan 1, 1993

  • 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
    International Conference On Ground Control In Mining Design Of Three-Entry System For Super Longwall Panels

    By J. D. Cole

    In order to reduce the number of longwall face moves and to increase the rate of gateroad construction, super longwall panels, 1000 feet wide and 12000 to 14000 feet long, are planned for Wolf Creek C

    Jan 1, 1990

  • SME-ICGCM
    Analysis of Panel Stability for Post-Mining Slurry Injection

    By Tim Ross

    Slurry injection into mined-out panels is an attractive alternative for disposal of coal preparation plant fines. however, in areas where surface subsidence cannot be tolerated, either by law or neces

    Jan 1, 1998

  • SME-ICGCM
    Geotechnical Mine Design Of The Foidel Creek Mine

    By H. N. Maleki

    The results of five years of geotechnical investigations are presented to develop productive and stable longwall layouts for the Foidel Creek Mine. The program was initiated during the pre-mining stag

    Jan 1, 1988

  • SME-ICGCM
    Rehabilitation of Underground Surge Bunker Following Massive Rib Wall Failure

    By Rob Robinson

    Following a massive rib wall failure along the reclaim belt of the large underground surge bunker at CONSOL?s Bailey Mine, a multifaceted, cleanup and rehabilitation effort was initiated to rapidly st

    Jan 1, 2007

  • SME-ICGCM
    Changes In Seismic Measurements With Blast Induced Fracturing: A Field Experiment

    By Clifford J. Roblee

    In this paper, various seismic indicators are evaluated for ability to discern fractures induced into a rock mass by blasting. This is accomplished by presenting results from in situ crosshole seismic

    Jan 1, 1989

  • SME-ICGCM
    Expanded Cement: New Solutions for Age-Old Problems

    By John K. Wood

    The development of an expanded cement product represents a major advance in the technology of roof control systems. Such a product is gaining recognition as a valuable tool in today's cost- consc

    Jan 1, 1986

  • SME-ICGCM
    Management of the Dynamic Phenomena of Rock Pressure in Underground Mines

    By Vladimir I. Klishin

    Complex method of ruling of rock pressure is considered in conditions of rapid roof subsidence. The purpose of this method is elaboration of emergency devices into hydraulic props. Also method of unlo

    Jan 1, 1997

  • SME-ICGCM
    Mine Panel Collapse - Two Case Studies

    By Hanjie Chen

    A mine panel collapse may occur when pillar sizes are too small or the surrounding rock strata (roof or floor) yields. After a small pillar fails, its loading is rapidly transferred to adjacent pillar

    Jan 1, 1999

  • 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
    Effects Of Surface Topography On The Stability Of Coal Mine Openings

    By Gregory M. Molinda

    An investigation was conducted to determine the nature and frequency of coal mine roof failure beneath valleys. A mechanism for this failure, and suggestions for controlling this problem are presented

    Jan 1, 1990

  • SME-ICGCM
    Coping With High Lateral Stresses In An Underground Illinois Coal Mine (Inland Steel Coal Capany, Mine #2)

    By C. Tom Blevins

    The purpose of this paper is to discuss production and roof control problems associated with directional lateral stresses in an in situ stress field and the approach that Inland Steel Coal Company mad

    Jan 1, 1982

  • SME-ICGCM
    Determination of the Optimum Crown Pillar Thickness between Open Pit and Block Caving

    By Kourosh Shahriar, Kazem Oraee, Ezzeddin Bakhtavar

    "In this paper, a relationship between dependant parameters and the crown pillar thickness is first introduced. This relationship defines geotechnical problems caused by thin pillars and economic cons

    Jan 1, 2010

  • SME-ICGCM
    Determination Of Limitation Of Roof Layer Separation (LRLS) In Entry Roof

    By Wenjun Ju

    It's very important to determine the limitation of bed separation in entry roof in order to predict roofs stability and take some necessary precautions. Based on numerical modeling and monitoring

    Jan 1, 2001

  • SME-ICGCM
    Stepwise Support Technology For Extremely Soft Rock Roadway And Its Engineering Application

    By Xinchuan Xia

    Based on the stepwise strain features and the strength reduction law of the surrounding rock in extremely softrock roadway, this paper proposes a dynamic supporting principle. A new kind of stepwise r

    Jan 1, 2000

  • SME-ICGCM
    The Rheological Fracture Properties And Outburst Mechanism Of Coal Containing Gas (d683aa0b-ccc6-4082-b59a-667b798b544c)

    The properties of coal or rock containing gas are very important both for studying coal and methane outburst mechanism and for controlling underground rock in mining. The theological fracture properti

    Jan 1, 1992

  • SME-ICGCM
    Prediction of Roof Fall Rate in Coal Mines Using Fuzzy Logic

    By Ebrahim Ghasemi

    Roof fall risk is a common problem in coal mines, and it is generally unpredictable due to variability in geological and mining parameters. In this study, a new fuzzy logic model was developed to pred

    Jan 1, 2011

  • SME-ICGCM
    Roof Instability of Longwall Face at Ikeshima Colliery

    By Kikro Matsui

    Longwall mining 1s more productive in comparison to other methods but requires particular conditions for its effective use This paper relates to longwall roof instability at Ikeshima Colliery In order

    Jan 1, 1997