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  • SME-ICGCM
    Performance Characteristics for Large Sections of Welded Wire Screen With Multiple Pull Patterns

    By Timothy J. Matthews, Timothy J. Batchler, Ted M. Klemetti

    "From 2011–2016, there were 1,511 documented injuries, including 7 fatalities, from ground falls in underground coal mines in the United States. The majority of these ground-fall injuries were not cau

    Jan 1, 2018

  • SME-ICGCM
    Energy Concepts in the Analysis of Unstable Coal Pillar Failures

    By Eric C. Poeck, Ryan Garvey, Ugur Ozbay, Kun Zhang

    "A coal bump is characterized by the sudden failure of one or more pillars and an associated release of kinetic energy. Although the geologic conditions surrounding coal bumps are often similar, their

    Jan 1, 2015

  • SME-ICGCM
    Mechanism and Prediction of Ground Surface Subsidence Due to Multiple-Seam Longwall Mining

    By Gang Ren, Behrooz Ghabraie

    "Observational data suggest that the ground surface subsidence profile from multiple-seam longwall mining is rather different from that of single seam. Despite the increase of coal production from mul

    Jan 1, 2016

  • SME-ICGCM
    Structural Stability of U–Steel Frame and Its Control Technology

    By Xingkai Wang, Wenbing Xie

    "To control the large deformation of soft rock around the roadway subjected to high stress, it is important to improve the stability of support structure, in addition to increasing support strength. I

    Jan 1, 2015

  • SME-ICGCM
    Analysis of Roof and Pillar Failure Associated with Weak Floor at a Limestone Mine

    By Tim Miller, Michael M. Murphy, John L. Ellenberger, Gabriel S. Esterhuizen

    "A limestone mine in Ohio has had instability problems that have led to massive roof falls extending to the surface. This study focuses on the role that weak, moisture-sensitive floor has in the insta

    Jan 1, 2015

  • SME-ICGCM
    Evaluating Roof Control In Underground Coal Mines With The Coal Mine Roof Rating

    The U.S. Bureau of Mines (USBM) has developed the coal Mine Roof Rating (CMRR) to aid in ground control. This paper describes the application of the CMRR at four coal mines operated by a major U.S. co

    Jan 1, 1994

  • SME-ICGCM
    Stress Measurements for Safety Decisions in Longwall Coal (4b24fd83-539f-4e52-8928-06b50544afce)

    By Eric Zahl

    Researchers at the Spokane Research Laboratory of the National Institute for Occupational Safety and Health, Spokane, WA, have collaborated with three Western longwall coal mines in an ongoing effort

    Jan 1, 2002

  • SME-ICGCM
    Effect Of High-Extraction Coal Mining On Surface And Ground Waters

    By Francis S. Kendorski

    High-extraction mining of coal and other stratified minerals has a predictable effect on the surface and subsurface. Impacts on ground waters in overlying strata and on surface waters, that are associ

    Jan 1, 1993

  • SME-ICGCM
    Letter Of Nomination - 26th International Conference on Ground Control in Mining

    By Christopher Mark

    Dr. Christopher Mark serves as Team Leader of the Rock Mechanics Section in the Rock Safety Engineering Branch of the NIOSH - Pittsburgh Research Laboratory. In this position he leads a multi-discipl

    Jan 1, 2007

  • SME-ICGCM
    A New Approach To The Design Of Multi-Entry Developments For Retreat Longwall Mining (b0ac6f64-13ae-4c08-a631-b7e01a7e984e)

    By Frederick Carr

    1. The application of retreat longwall mining to the North American coal mining conditions is be¬coming more advantageous as more experience is gained. The productivity results being achieved and pote

    Jan 1, 1982

  • SME-ICGCM
    Measurements of Horizontal Shear Movements Ahead of Longwall Mining and Implications for Overburden Behaviour

    By Jesse Puller, Ken W. Mills, Owen Salisbury

    "An underground coal mine located in New South Wales has a target coal seam located 160-180 m deep directly below a 16-20 m thick conglomerate unit that has been associated with significant periodic w

    Jan 1, 2015

  • SME-ICGCM
    Strata Behavior Monitoring of the Sub-Inclination Fully Mechanized Top-Caving Face in Steeply Dipping Extra Thick Coal Seam

    By Dongfeng Yun, Zhu Liu, Wendong Cheng, Zhendong Fan, Dongfang Wang, Yuanhao Zhang

    "For the purpose of studying the strata behavior due to multislicing top coal caving longwall mining along-the-strike direction in steeply dipping extra thick coal seams, the shield support pressures

    Jan 1, 2016

  • SME-ICGCM
    Design And Experience Of Total Extraction Room And Pillar Operations Above Depleted Longwall Panels

    By Kenneth Rigsby

    Black Mountain Resources' Highlands Mine No. I is a full extraction room and pillar operation located in Harlan County, Kentucky. Black Mountain extracts the 0.9 to 1.1 meter (36- to 42-inch) thi

    Jan 1, 2003

  • SME-ICGCM
    Case Study Of Stability Investigations Related To Shallow Underground Mining Of Iron Ore In The United Kingdom

    By S. F. Smith

    Following a roof beam collapse on a major production district at the British Steel Corporation's Dragonby Iron Ore Mine, Scunthorpe, South Humberside, UK, rock mechanics investigations were under

    Jan 1, 1995

  • SME-ICGCM
    Effects Of Mining On Underground Infrastructures In The German Hard Coal Sector

    By Anton Sroka

    The German hard coal production predominantly derives from underground multiseam mining activities. Beside common surface damages, ?inner mine damages? on underground infrastructures (i.e. main roads,

    Jan 1, 1999

  • SME-ICGCM
    Full-Scale Performance Evaluation of Mobile Roof Supports

    By Thomas M. Barczak

    The performance characteristics of Mobile Roof Supports (MRS's) were evaluated through full-scale testing in the Strategic Structures Testing Laboratory at the National Institute for Occupationa

    Jan 1, 1997

  • SME-ICGCM
    A Study of the Performance of Glass Fibre Rock Reinforcement Components

    By Jonathan P. Furniss

    The paper describes a range of laboratory tests undertaken on full column resin anchored glass fibre rockbolt systems, to assess all aspects of their performance. Laboratory instrumentation has been d

    Jan 1, 1997

  • SME-ICGCM
    Development and Application of the TT Anti?Friction Washer for Use with Tensioned Roof Bolt Systems

    By Thomas A. Cook

    The effectiveness of tensioned roof bolt systems has been well researched and documented over the years (Stankus, 1990, 1991, 1997; Guo, 1997; Denton, 2000; Su, 2007). Higher and more consistent inst

    Jan 1, 2014

  • SME-ICGCM
    Optimization of Chain Pillars Design in Longwall Mining Method

    By Kazem Oraee, Mehran Gholincjad, Navid Hosseini

    "Chain coal pillars are pans of the structure of longwall mining system that play a significant role in the stability of the entries. With mechanization and developments in the various aspects of the

    Jan 1, 2010

  • SME-ICGCM
    A Case Study Of Grouted Roof Bolt Loading In A Two-Entry Gate Road

    By Stephen P. Signer

    A field test was conducted by the U.S. Bureau of Mines at the Cyprus Plateau Starpoint No. 2 Mine. near Price. UT. to study the support rock interaction mechanics. Twelve instrumented. fully grouted r

    Jan 1, 1990