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  • SME-ICGCM
    The Requirements of a Database to Store Geotechnical Data to Assist in Roof Support Design

    By Ross Seedaman

    The specification of roof support needs to consider rock strength, imposed ground stresses, and more importantly the bedding and joint structure of the immediate roof rocks. A database structure has b

    Jan 1, 2003

  • SME-ICGCM
    Implication of Highly Anisotropic Horizontal Stresses on Entry Stability at the West Elk Mine, Somerset, Colorado

    By J. F. T. Agapito

    Overcore measurements at the North Fork Valley (NFV) coal mines in western Colorado have shown that horizontal stresses are highly anisotropic. Measurements have been made in four mines at various dep

    Jan 1, 2005

  • SME-ICGCM
    Effect of High Horizontal Stress on Coal Mine Entry Intersection Stability

    By K. Hanna

    This manuscript describes an extensive ground control study at the Inland Steel No. 2 Mine near McLeansboro, IL, conducted by the U.S. Department of the Interior's Bureau of Mines (USEM) in coope

    Jan 1, 1986

  • 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
    The Importance of Underground Stone Mine Roof Geology

    By Frank Kendorski

    Several startup or longtime underground stone mines have experienced unanticipated roof control difficulties due to the variable geologic character of the roof strata. Careful mapping of roof conditio

    Jan 1, 2002

  • SME-ICGCM
    Bolting Practice In Longwall Gateroads At The Miike Colliery

    By Kikuo Matsui

    Standing supports such as steel arches or square work supports along with the necessary struts and lagging have been traditionally employed in the longwall gateroads of the Japanese underground coal m

    Jan 1, 1993

  • SME-ICGCM
    Analysis of Entry Stability Associated with Multi-seam Mining - A Case Study

    By Jisheng Han

    Interaction effect exists when two or more neighboring seams are mined. The mining activity in one seam causes stress redistribution and strata movement in both the roof and floor. When the thickness

    Jan 1, 2005

  • SME-ICGCM
    Investigation Of Subsidence Event Over Multiple Seam Mining Area (b421bdde-19e7-491b-bc6d-a4cce9ef42b4)

    By Kewal K. Kohli

    An investigation was performed to determine the sequence of events which caused the 1987 surface subsidence and related damage to several homes in Walker County, Alabama, USA (see Figure 1). Surface a

    Jan 1, 1992

  • SME-ICGCM
    Application Of Bolt Design Criteria At Galatia Mine

    By Tom Denton

    The bolt design criteria, since it was first published by Dr. John Stankus (Stankus, 1997), has been recognized as an important tool in ground control design. This concept is based on the Optimum Beam

    Jan 1, 2000

  • SME-ICGCM
    An Investigation into the Support Systems in South African Collieries

    By A. Wilkinson

    An investigation into the performance of support systems that are currently used in South African coal mines was conducted. Five most critical components of a support system have been identified. Thes

    Jan 1, 2005

  • SME-ICGCM
    An Investigation Of Longwall Pillar Stress History

    By M. G. Schuerger

    The United States Steel Mining Company, Inc., (USM) Lynch District, operated the No. 37 Mine in the Harlan coal seam, Harlan County, Kentucky, from 19'2 until its sale to Arch of Kentucky in 1984

    Jan 1, 1984

  • SME-ICGCM
    Operational Experience With FLEXIBOLT Systems In Australian Coal Mines

    Since the initial development and trials of FLEXIBOLT flexible roof bolts, further comparative testing and product development has been completed as part of the changeover to this roof support system

    Jan 1, 1994

  • SME-ICGCM
    Recent Developments in the Use of Seismic Tomography in Longwall Mines

    By Erik Westman

    Tomographic imaging, commonly known as a CAT-scan or CT-scan, is used in the medical field to generate a picture of the interior of a body. Current research is applying this method to bodies of rock s

    Jan 1, 2003

  • SME-ICGCM
    Floor Failure Induced By Lateral Stress Ahead Of Longwall Supports

    By J. A. Nemcik

    Although floor failure at longwall faces has been traditionally associated with a soft floor, in many csses floor buckling has been observed just ahead of the longwall supports, despite the floor bein

    Jan 1, 1995

  • SME-ICGCM
    Some Factors Influencing Stability Of Longwall Gateroad

    Excessive roadway closure in the gateroads impedes the passage of equipment, supplies, personnel and ventilation air in longwall panels. This pager describes several factors that influence the gat

    Jan 1, 1994

  • SME-ICGCM
    Rock Compaction Caused By Dewatering In Poorly- Consolidated Sandstones

    By Hamid R. Nikraz

    This paper reports the finding of a comprehensive investigation carried out to evaluate the compaction characteristics of saturated sandstone aquifers in the Collie Coal Basin under conditions anticip

    Jan 1, 1993

  • SME-ICGCM
    Cyprus Shoshone Tailgate Roof Control: Case Study

    By Andrew P. Schissler

    Cyprus Shoshone is an underground coal mine in southern Wyoming owned by Cyprus Coal Company, a subsidiary of Cyprus Minerals Company. To date, seven longwall panels have been extracted from the pitch

    Jan 1, 1993

  • SME-ICGCM
    The Structural Response Of A Steel Lattice Transmission Tower To Mining-Related Ground Movements

    By Robert W. Bruhn

    A 125 foot high steel lattice frame tower supporting a 500 kV EHV transmission line and located over the gateroads of a longwall mining operation was subjected to ground movements from the mining of a

    Jan 1, 1990

  • SME-ICGCM
    Eclipse Bolting System

    By Alan Campoli

    The Eclipse System was developed by Minova USA Inc. formerly Fosroc Inc. to improve the performance of 5/8-inch deformed rebar fully grouted into a one inch borehole. An 1/8-inch offset bolt head comb

    Jan 1, 2003

  • SME-ICGCM
    Effects of Longwall Mining on Streamflow in the Pittsburgh Seam Basin

    By Kenneth L. Johnson

    The effects of underground longwall coal mining on flow in perennial streams within the Pittsburgh seam basin were evaluated. Four streams above four different longwall mines were studied. Overburden

    Jan 1, 1997