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  • SME-ICGCM
    Stability Of Interpanel-Pillar And Deformation Of Gateroad Due To Longwall Mining

    Retreat longwall method with re-use of gateroad has been traditionally employed in Japan, mainly because of the advantage of higher recovery. But the Miike Colliery has newly introduced the interpanel

    Jan 1, 1990

  • SME-ICGCM
    Subsurface Fracture Development Due To Longwall Mining And Its Interpretation Using Image Processing Techniques (736b40e1-a21a-40c0-a678-75088df69d02)

    By Gexin Sun

    This paper presents the physical modelling results of subsurface fracture development associated with longwall mining operations and an application of image processing techniques to interpretion of th

    Jan 1, 1992

  • SME-ICGCM
    Protecting Underground Coal Miners From Rib Falls

    By Michael Gauna

    In 2010, the number of fatal rib falls in U.S. underground coal mines exceeded fatal roof falls for the first time ever. While recent trends have seen roof fall fatalities reduced by about 62% since t

    Jan 1, 2011

  • SME-ICGCM
    Mapping Hazards With Microseismic Technology To Anticipate Roof Falls - A Case Study (ac4523c6-7bdb-4660-a1cb-20433a65c0ed)

    By Anthony Iannacchione

    As the amount of new fractured surfaces or "damaged rock layers" within roof rock increases, the stability of the rock mass decreases. While direct measurements of this phenomenon are not easily made,

    Jan 1, 2004

  • SME-ICGCM
    Comparison of Acoustic Emission and Stress Measurement Results to Evaluate the Application of the Kaiser Effect for Stress Determination in Underground Mines

    By Lorraine Kent

    Comparison of in-situ stress overcore measurement results with those determined from laboratory evaluation of Acoustic Emission (AE) testing on oriented sub-core samples has been carried out for a var

    Jan 1, 2002

  • SME-ICGCM
    Design And Planning Of Lower Seam Longwall Gateroads

    Case study data were analyzed to develop and quantify empirical stress transfer relationships between seams for both longwall and room and pillar mines. Layering in the innerburden and the distance be

    Jan 1, 1995

  • SME-ICGCM
    Modern Geotechnical Exploration And Mine Design

    By Patrick S. Artrip

    A deep mining operation in the Lower Kelly (Imboden) seam in Wise County, Virginia experienced severe ground control conditions in its attempt to develop reserves situated under increasingly higher co

    Jan 1, 1993

  • SME-ICGCM
    A Model Of Shield-Strata Interaction And Its Implications For Active Shield Setting Requirements

    By Thomas M. Baraak

    This paper evaluates factors which influence longwall support and strata interaction. The longwall system is composed of an immediate and main roof structure and three supporting foundations: 1) longw

    Jan 1, 1990

  • SME-ICGCM
    International Experience with Longwall Mining into Pre-driven Rooms (7f55d3bb-2127-4b96-860d-e3684bbd8397)

    By David Oyler

    Unusual circumstances may require that a longwall retreat into or through a previously driven room. The operation can be completed successfully, but there have been a number of spectacular failures wh

    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
    Roof Bolting Application In Longwall Mining In Indonesia And Japan

    By Herryal Anwar

    The application of roof bolting technology to control the stability of roadways in coal mining within weak strata or under high ground pressure has improved progressively. One of several factors that

    Jan 1, 1999

  • SME-ICGCM
    Development of A Yielding Steel Post

    By John P. Dunford

    Ground support continues to be the most important safety consideration in underground mining. The Bureau of Mines has developed a yielding steel post with a capacity of 45 tons and b c1osure allowance

    Jan 1, 1986

  • SME-ICGCM
    The Implementation of Rock Mechanics Into a Multiple Level Limestone Mine

    By David A. Newman

    In the 1950s, an underground limestone mine in the Camp Nelson Formation was developed from an outcrop exposure. The Camp Nelson Limestone met the requirements for DOT stone and aggregate. The mine

    Jan 1, 2014

  • SME-ICGCM
    Three-Dimensional Simulations Of The Roof Behavior In Coal Room And Pillar Panels

    By Andre Vervoort

    The roof in coal room and pillar panels is normally stratified and can be thought of as beams or plates supported by the pillar sides in the roadways and by pillar corners in the intersections Undergr

    Jan 1, 2000

  • 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
    Prediction of Inter-Strata Movements Above Longwall Faces (bade68bf-520f-401d-9d3a-43ba4395e61a)

    By Neil Styler

    This paper presents an analysis of measurements of inter-burden de- formations above six longwall faces. An attempt is made to demonstrate some correlation between the movements at the various sites,

    Jan 1, 1984

  • SME-ICGCM
    Determining Horizontal Stress Direction Using The Stress Mapping Technique

    By T. P. Mucho

    Mine roof failure due to excessive horizontal stress has been recognized as a major cause of hazardous roof conditions in some mines. Stress measurements gathered by the U.S. Bureau of Mines (USBM) at

    Jan 1, 1994

  • SME-ICGCM
    Staubbekampfung An Schildausbau In Bruchbaustreben (Combating Dust On Shield Supports On Longwall Mining)

    By Wilfried Ufer

    [1. Einführung in die Problematik 1.1 Die Bedeutung des Schildausbaus Seit fast 30 Jahren ist die Konkurrenzsituation auf dem Primärenergiemarkt der Bundesrepublik Deutschland durch einen von Erdöl

    Jan 1, 1984

  • SME-ICGCM
    Rock Mechanics and the Analysis of Underground Mine Stability Adjacent to Coal Refuse Impoundments

    By David Newman

    Coal refuse impoundments and underground mines are frequently sited in close vertical and horizontal proximity in the valleys of the Southern Appalachian coalfield. The steep V-shaped valleys provide

    Jan 1, 2003

  • 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