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  • SME-ICGCM
    Development Of A Subsidence Database And Determination Of Subsidence Parameters

    By Syd S. Peng

    A total of 209 cases of subsidence data over longwall panels in 16 US coal seems have been collected and built into a subsidence database. The database is developed under MS Windows environment. It us

    Jan 1, 1995

  • SME-ICGCM
    Research, Development, And Use Of Steel-Fiber-Reinforced Concrete Cribbing For Mine Roof Support

    By Dale A. Didcoct

    Through the combined efforts of the C. S. Bureau of Mines, the coal industry, and Burrell Construction and Supply Company, New Kensington, PA, a steel fiber reinforced concrete crib block to improve c

    Jan 1, 1982

  • SME-ICGCM
    Applications Of Cement Grouting Method For Controlling Weak Strata

    By Herryal Z. Anwar

    In recent years, many both mining and civil engineering projects are developed in the area which may be categorized unstable, such as fractured and jointed rocks or "water sensitive rocks". For exampl

    Jan 1, 2000

  • SME-ICGCM
    Roof Bolt Bond Tester; A Device For Nondestructive Testing Of Grouted Bolts

    By Raymond M. Stateham

    The Bureau of Mines has developed a portable, lightweight device for determining the integrity of resin-grouted roof bolts. The instrument functions by sending a known pulse of ulstrasonic energy into

    Jan 1, 1982

  • SME-ICGCM
    Influence Of Partings In A Coal Seam On Long Term Pillar Stability

    By K. Biswas

    So far, all pillar design methods or approaches consider the coal seam as a uniform structure From some mine visits in northern Appalachian Region. it is found that some coal seams have binder or part

    Jan 1, 1995

  • SME-ICGCM
    Underground High Resolution Seismic Method As A Low Cost Alternative For Mapping Sandstone Replacement Channels In Coal Mines

    By Rene Rodriguez

    Sandstone paleo-channels encountered during coal mining operation can significantly slow down the advance in mining, and often completely shut-down coal mine production, with consequent extensive econ

    Jan 1, 1994

  • SME-ICGCM
    Gob Canopy Roof Support for Difficult Natural Conditions

    By Jay Hilary Kelley

    This paper proposes a modification of longwall roof support to meet new difficult mining conditions that are anticipated in the future. A gob canopy is a movable appendage attached on the rear of a lo

    Jan 1, 1997

  • SME-ICGCM
    Ground Deformation In The Case Of Underground Mining Of Thick And Dip Coal Seams In The Jiu Valley Basin

    By Gheorghe Oncioiu

    The phenomena developed on the influence of thick coal seam no.3 mining, by horizontal slices and rocks caving roof control, in the Jiu Valley coal basin, are very complex. By analyzing the influence

    Jan 1, 1999

  • SME-ICGCM
    Systems Used In Coal Mining Development In Long Tendon Reinforcement

    By Brian Clifford

    A wide range of different cablebolt systems are available and in use in hard rock and coal mines around the world. The birdcaged cablebolt was initially used in UK coal mines in conjunction with ro

    Jan 1, 2001

  • SME-ICGCM
    Field Test with Strain-gauged Friction Bolts at the Gold Hunter Mine, Mullan, Idaho, USA (f62ddf9f-aabd-4681-8d92-4a50602e035c)

    By Jeffrey Johnson

    To measure the loading behavior of friction bolts, researchers at the Spokane Research Laboratory of the National Institute for Occupational Safety and Health (NIOSH) installed strain gauges on the in

    Jan 1, 2003

  • SME-ICGCM
    Remote Control Roof Bolting

    By Cosmo P. Fazio

    Remote control roof bolting is approaching reality with the continued improvement of a number of components and subsystems being developed by The Bendix Corporation under sponsorship of the U.S. Burea

    Jan 1, 1982

  • SME-ICGCM
    Development and Application of Impact-Resistant Lagging for Steel Sets Installed at Underground Roof Fall Areas

    By Kevin Jinrong Ma

    Underground mines often experience roof falls in entries, crosscuts, and intersections of active mining sections, main travel ways, and belt entries. Roof fall heights greater than 20 ft (6 m) make re

    Jan 1, 2011

  • SME-ICGCM
    Geotechnical Investigation For A Single Entry Design For Longwall Mining

    By Madan M. Singh

    Currently longwall coal mining operations require at least 3 entries on both the headgate and tailgate ends because of ventilation and safety requirements. Driving of entries, however, is a slow and c

    Jan 1, 1982

  • SME-ICGCM
    Case Study of Conditions Observed During the Removal of a Highly Fractured Roof Beam in Bedded Halite

    By Liane J. Terrill

    A 9O) ft (275 meter) section of a highly fractured beam of halite was mined from the roof of a supported thirteen year old drift at the Waste Isolation Pilot Plant (WIPP). The operation was conducted

    Jan 1, 1997

  • SME-ICGCM
    A Comparison Of Overburden Response Due To Longwall Mining

    By David K. Ingram

    The objective of this U.S. Bureau of Mines (USBM) investigation was to characterize overburden response due to longwall mining. Subsurface strata and surface deformations were monitored at two sites i

    Jan 1, 1994

  • SME-ICGCM
    Analyses of Valley Fill Slope Stability - Three Case Studies

    By Shiva P. B. Kolli

    Surface mining of multiple scams by mountaintop mining methodology is complex in the Appalachian region of West Virginia. Excess spoil from the removal of overburden and interburden is disposed in the

    Jan 1, 2001

  • SME-ICGCM
    Development Cooperation Between Operator And Manufacturer - Point Anchor Resin Bolts

    By C. C. White

    Much benefit can be achieved by a mining company and a manufacturer if both parties can communicate effectively with each other and assist in product development; mutually beneficial ideas and product

    Jan 1, 1982

  • SME-ICGCM
    Seismic Events Due To Underground Mining Activities

    By R. Fritschen

    In order to investigate locations, source parameters, and source mechanisms of mining induced seismic events, a local network of seismic stations was installed at a coal mine in the eastern part of th

    Jan 1, 1999

  • SME-ICGCM
    Application Of Mechanical And Groundwater-Flow Models To Predict The Hydrogeologic Effects Of Longwall Subsidence - A Case Study

    By Danny J. Van Roosendaal

    An investigation was undertaken to determine hydrogeological effects of subsidence over a longwall coal mine in the Illinois Basin. At this mine, approximately 200 ft of bedrock overburden is overlain

    Jan 1, 1995

  • SME-ICGCM
    Current Trends In Roof Truss Hardware

    By C. P. Mangelsdorf

    The success of the Birmingham roof truss (Figure 1) in supporting some difficult roof conditions, particularly in the Illinois coal basin, has given impetus to the development of a number of alternate

    Jan 1, 1982