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  • SME-ICGCM
    Deformation Mechanism and Floor Heave Control Technology in Deep? Buried Full Seam Chamber

    By Xicai Gao

    With the intensification and expansion of deep coal mining, the surrounding rock stress environment becomes further deteriorated because of the complicated geological environment and powerful mining e

    Jan 1, 2013

  • SME-ICGCM
    Longwall Shield Recovery, Using Phenolic Foam Injection for Gob Control As An Alternative to Recovery Mesh

    By James D. Pile

    Following a methane ignition in the active panel of a longwall coal mine, the affected panel was successfully isolated from the rest of the mine. This allowed for the remainder of the mine to return t

    Jan 1, 2013

  • SME-ICGCM
    Microseismic Monitoring of Mountain Bumps and Bounces: A Case Study

    By J. L. Condon

    The Bureau of Mines, through in-house and contract research, monitored mountain bump-prone areas of the Olga #2 Mine, near Welch, WV, using microseismic techniques for 15 months during 1985 and 1986.

    Jan 1, 1987

  • SME-ICGCM
    Three Dimensional Modeling of a Surface Displacements As a Result of an Underground Longwall Panel Extraction

    By Anton Sroka, Antoni Tajdus, Axel Preusse, Krzysztof Tajdus

    "In Europe, the magnitude and range of mining deformation predicted on the surface have been, in most cases, determined using methods based on Gauss' influence function (e.g., Knothe's theory, Ruhrkoh

    Jan 1, 2010

  • SME-ICGCM
    Modern Shield Technology: Better Than Ever But Still Not Perfect

    By Thomas M. Barczak

    A survey of the longwall industry was conducted to examine the performance of modern shield technology. The results of this survey indicate that state-of-the-art shields perform better and last longer

    Jan 1, 1999

  • SME-ICGCM
    Development of An Enhanced Methodology for Ground Movement Predictions Due to Longwall Mining in the Illinois Basin

    By Zach G. Agioutantis

    The Illinois Basin has an extensive history with the use of mechanized longwall mining dating back to the early 1970?s. In recent times, technological advances have resulted in increased panel widths

    Jan 1, 2014

  • SME-ICGCM
    Innovative Ground Support System (23660f1b-763d-4a59-bd83-98b27cd5764f)

    By P. A. Gray

    Artificial ground support has developed into a relined science over the past 20 years. From reactive support systems such as timber props and steel supports, to active systems such as roof bolts and c

    Jan 1, 1992

  • SME-ICGCM
    Upwards Surface Movement above Deep Coal Mines after Closure and Flooding of Underground Workings

    By Pierre-Yves Declercq, Andre Vervoort

    "After the mass closures of entire coal mine districts in Europe at the end of the last century, a new phenomenon of surface movement was observed—an upward movement. Although most surface movement (i

    Jan 1, 2017

  • SME-ICGCM
    Whole-Mine Subsidence over Tabular Deposits and Related Seismicity

    By William G. Pariseau, Michael K. McCarter

    "The challenge of estimating mine-wide subsidence and linkages to seismicity over tabular deposits is addressed by a special finite element technique (dual node - dual mesh). Subsidence and mine-induc

    Jan 1, 2016

  • SME-ICGCM
    Support Strategy for Tailgates below Gob Edge Using Split-Level Longwall Panel Layout for Deep Inclined Coal Seams

    By Pengfei Wang, Guorui Feng

    With increase of cover depth, dynamic incidents, such as large gateroad convergences and coal bursts, are frequently encountered when mining deep longwall panels. It would be more adverse due to large

    Jan 1, 2018

  • SME-ICGCM
    Ground Control Monitoring of Retreat Room-and-Pillar Mine in Central Appalachia

    By William J. Conrad, Ryan J. Molka, Erik C. Westman

    "In order to study pillar and overburden response to retreat mining, a ground control program was conducted at a Central Appalachian mine. The program consisted of several monitoring methods including

    Jan 1, 2016

  • SME-ICGCM
    The Role Of Engineering And Geology In Analyzing Ground Control Conditions

    By David A. Newman

    Severe roof control problems have plagued a West Virginia underground mine since its initial development in the late 1970's. Adverse roof conditions in the Eastern portion of the reserve result f

    Jan 1, 1999

  • SME-ICGCM
    Research Progress on Fully Mechanized Mining Technology of Steeply Dipping Seams

    By Hongwei Wang, Hao Zhang, Panshi Xie, Xicai Gao, Youfu Zeng, Yongping Wu, Juan Dou

    "The reserves and production of steep coal seams account for approximately 15–20% of the total coal reserves in China and 5–10% of the total annual coal production. More than 50% of the coal is high-q

    Jan 1, 2017

  • SME-ICGCM
    Determination Of Classification Parameters For Clay - Bearing And Stratified Rock Mass

    By Erdal Unal

    In underground mining today, safety and economical aspects demand a better understanding of the rock-mass conditions, particularly for design of underground mine openings excavated in weak and stratif

    Jan 1, 1990

  • SME-ICGCM
    Prediction Of Subsurface Subsidence For Longwall Mining Operations

    By Yi Luo

    Subsurface strata movements and deformations associated with underground mining activities could cause problems to subsurface structures and water bodies. By incorporating the methods for surface subs

    Jan 1, 2000

  • SME-ICGCM
    Support Selection For The Multi-Lift Mining Method

    By Claude A. Goode

    Large quantities of high grade coal exist in thick seams in the United States. Many of these thick seams are too deep to be surface mined and do not lend themselves readily to underground extraction.

    Jan 1, 1981

  • SME-ICGCM
    Study of Energy Release Associated with Coal Burst Occurrence

    By Chengguo Zhang, Bruce Hebblewhite, Faham Tahmasebinia, lsmet Canbulat

    "Coal burst is a dynamic release of energy within the rock (or coal) mass leading to high velocity expulsion of the broken/ failed material into mine openings. This phenomenon has been recognised as o

    Jan 1, 2016

  • SME-ICGCM
    Rock Mass Classification As An Aid To Estimating The Strength Of Coal Pillars (77026f3a-8230-4eb0-afbc-609f7a2ad471)

    Coal mass strength properties must be estimated to obtain realistic estimates of coal pillar strength. The limitations of existing techniques for approximating these properties are discussed. The coal

    Jan 1, 1992

  • SME-ICGCM
    The Advance And Relieve Mining Method: A Horizontal Stress Control Technique

    By Frank E. Chase

    Sacrificial entries, roof slotting, and other tactics have been used to combat high horizontal stresses during roadway development in U.S. coal mines. In Australia, the "pillar extraction on the advan

    Jan 1, 1999

  • SME-ICGCM
    Evaluation Of Subsidence Parameters For Inclined Seams In UK Coalfields

    By X. L. Yao

    This paper analyses the effects of mining extraction geometry (width/depth ratio) and dip of seam on subsidence parameters based on a large Database, containing 120 longwall mining cases all within th

    Jan 1, 1990