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  • SME-ICGCM
    Global Trends in Coal Mine Horizontal Stress Measurements

    By Christopher Mark

    Knowledge of in situ stresses is fundamental to many studies in earth sciences, and coal mine ground control is no exception. During the past 20 years, it has become clear that horizontal stress is

    Jan 1, 2008

  • SME-ICGCM
    On Rock Failure Criteria for Coal Measure Rocks

    By Murali Gadde

    Design of underground excavations in coal mines involves two major tasks: estimation of stresses and determination of rock mass strength. Owing to the complicated nature of rock mass, progress in its

    Jan 1, 2007

  • SME-ICGCM
    Fully-Grouted, High-Strength, Mechanical Shell Tensioned Bolt Improves Pittsburgh Seam Primary Roof Support

    By Daniel Su

    Approximately 90% of the primary roof bolts used in CONSOL?s Pittsburgh seam coal mines is 2-piece, 8-foot long, 7/8? (or ¾?), high-strength, resin assisted, mechanical shell tensioned bolt. The remai

    Jan 1, 2007

  • SME-ICGCM
    Monitoring Indices For The Support And Surrounding Strata System On A Longwall Face (d3af3b40-bd2b-43ab-adc6-f4c445bf5433)

    By Ming-Gao Qian

    How to monitor and control the support and surrounding strata system on a longwall face effectively is one of the major research problems in ground control. Based on observations on movements of the s

    Jan 1, 1992

  • SME-ICGCM
    Computer Modeling Of Rock Mass Geomechanic State In Longwall Design

    By V. D. Jalevsky

    A new methodology of an experimental-analytical approach has been developed. It is used in building an information geomechanic monitoring system for the modeling of geomechanic processes during coal s

    Jan 1, 1996

  • SME-ICGCM
    Pillar Optimization For Initial Design And Retreat Recovery

    By Charles Steed

    The design of pillars in room and pillar operations is always a compromise between factor of safety and ore recovery. In actively mined and accessed areas the stability of pillars must be sufficient t

    Jan 1, 2003

  • SME-ICGCM
    Development of Mains in Challenging Ground Conditions

    By Kot F. v. Unrug

    The present combination of coal market prices and reserves, situated in the Central Appalachian Coal Field, is such that mining of smaller coal reserve blocks has become economically attractive. In

    Jan 1, 2006

  • SME-ICGCM
    Application Of Computer Programs For Rock Pressure Control

    By V. M. Shick

    For practical purposes of the use of information resources in the field of geomechanics and mine surveying with accepted mining technology in mines, the authors have developed the packaged software pr

    Jan 1, 1996

  • SME-ICGCM
    Seismic Studies Over Active Longwall Mines

    By Thomas H. Wilson

    Common offset and refraction seismic data have been collected over four longwall panels at two different locations within West Virginia. Surveys prior, during and after mining were made in both areas.

    Jan 1, 1988

  • SME-ICGCM
    Roof Bolter Rocker Pad Deflector Systems (6ff5d1f9-2211-4169-8a90-2ad9493ee24a)

    By Arnold Hammons

    Automated temporary roof support (ATRS) systems have been incorporated into roof bolters since the 1970?s. During roof bolting, many injuries have occurred from large pieces of draw rock falling inby

    Jan 1, 2009

  • SME-ICGCM
    New Type of Load Cell for Monitoring of Roof Bolt Tension

    By K. Unkug

    It is commonly accepted that the tension of roof bolts can be used as a measure of the effectiveness of roof support performance in coal bearing strata. The conceptual base for the assumption orig

    Jan 1, 1986

  • SME-ICGCM
    Field Test Results On Dyna-Rok And Dyna-Rok Plus Anchors

    By James J. Scott

    Research and development has been carried out on the patented Dynamic Rock Anchor, tradenamed DYNA-ROK and DYNA-ROK PLUS Anchors, which are manufactured and marketed by Ingersoll-Rand Company. This pa

    Jan 1, 1990

  • SME-ICGCM
    Monitoring Subsidence Over Submarine Coal Mines In The Sydney Coalfield By Bathymetric Methods

    By David Forrester

    Subsidence beneath the land surface has traditionally been monitored using the most accurate surveying methods of the day. Over the several hundred years of subsidence investigation, these techniques

    Jan 1, 1996

  • SME-ICGCM
    Surface Subsidence. in Longwall Mining--A Case Stud

    By R. D. Yancich

    A case study of longwall mining surface subsidence was performed at a mine in Southwestern Pennsylvania. The mine operated in the Pittsburgh coal seam which averaged 70-72 inches with 6-8 inches draw

    Jan 1, 1984

  • SME-ICGCM
    Longwall Mining in Illinois: A Controversy over Planned Subsidence of Flat Farmland

    By Daniel Barkley

    Underground coal mining in Illinois has a lengthy history dating back to the early 1800?s. High extraction underground mining has played a significant role in production through out this time. Mode

    Jan 1, 2007

  • SME-ICGCM
    Physical Simulation of Overburden Movement and Stability of Aquiclude in Shallow Seam Mining

    By Qingxiang Huang

    Shallow seam coal field has the largest coal reserve in China. Mining in shallow depth causes serious problems. One of them is subsurface dewatering. In this paper, the physical simulating model was p

    Jan 1, 2006

  • SME-ICGCM
    Calcium Aluminate Kiders in Hard Rock and Coal Mining

    By Bernard Woolley

    The history of the use of calcium aluminates in mining is discussed including a review of very rapid hardening concretes, anchoring using cement capsules and pumped ground control systems. Specific re

    Jan 1, 1997

  • SME-ICGCM
    Effects of Rock/Coal Interface Property on Coal Pillar Strength

    By Jun Lu

    There are many factors affecting the strength of pillar, including width-to-height (W/H) ratio, mechanical properties of coal and surrounding rocks, property of partings in the coal, and the interface

    Jan 1, 2008

  • SME-ICGCM
    Ropes mine crown pillar rock mechanics

    By W. G. Pariseau

    A crown pillar cave occurred at the Ropes Mine in December, 1987, that resulted in closure of the mine. Production was resumed soon afterwards with the formulation of a rock mechanics plan designed to

    Jan 1, 1989

  • SME-ICGCM
    Cavability Investigation Of A Stratabound Copper Deposit, Tong Kuang Yu Mine, Shanxi Province, China

    By W. C. Lacy

    Stratabound copper ore bodies in thick Proterozoic metamorphosed sedimentary and volcanic rocks at the Tong Kuang Yu Mine in southern Shanxi Province of China were considered as possibly being amenabl

    Jan 1, 1989