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  • SME-ICGCM
    Numerical Modeling of the Pillar Confinement with Backfilling Material in Room?and?Pillar Coal Mining

    By Andre Zingano

    It is known that the backfilling confinement increases the pillar strength and also reduces the rib lateral displacement. With backfilling, it is possible to increase the room-and-pillar mining recove

    Jan 1, 2011

  • SME-ICGCM
    The Impact Of Variability In Coal Strength On Mine Planning And Design - A Case History

    By David A. Newman

    Strength and physical property testing of coal is conducted regularly by the Arch Mineral Corporation as part of reserve exploration. Pillar design and mine layout are the primary applications for the

    Jan 1, 1993

  • SME-ICGCM
    Analysis Of Longwell Shields And Their Interaction With Surrounding Strata In A Deep Coal Mine

    By Duk-Won Park

    A vast majority of the operating longwall sections use shield-type face supports to provide ground control in the United States. As a co-operative research program between the University of Alabama (U

    Jan 1, 1992

  • SME-ICGCM
    Resin Annulus Size Effects On Rebar Bolt Pull Strength And Resin Loss To Fractured Rock

    By Al Campoli

    One of the critical variables affecting resin bolt performance is the size of the resin annulus, defined as the difference between the hole and bolt radius. The vast majority of the millions of resin

    Jan 1, 1999

  • SME-ICGCM
    Roof Control and Roadway Support Design in the #9 Coal Seam, Wuhushan Coal Mine, China

    By Yundong Ma

    In this paper the dynamic process of rock deformation and failure in the roadways of the #9 coal seam, Wuhushan Coal Mine by was simulated using the software "Rock Failure Process Analysis System (REP

    Jan 1, 2005

  • SME-ICGCM
    Research on Mine Pessure Behaviors and Overlying Strata Movement Laws in Solid Backfill Mining Methods

    By Shengli Yang

    Solid backfill mining, as a green mining technology, has the advantages of a higher resource recovery, less damage to the environment and the ability to dispose of waste underground. It has been appli

    Jan 1, 2011

  • SME-ICGCM
    Research on the rational structure of tensible rockbolt and the effect of surrounding rock reinforcement

    By Chao-jiong Hou

    The necessity of using tensible rockbolt in the roadway with soft rock, high in-situ stresses, mining influence and other complex conditions was discussed, the structures of three kinds of tonsibte ro

    Jan 1, 1989

  • SME-ICGCM
    Influence Of Bolts On Discontinuities And Yielding Rock - Conceptual Developments (76baa342-4034-40cb-bc1f-e7c7c132e40f)

    By Buddhima Indraratna

    The paper highlights the conceptual developments in rock mechanics applied to quantify the effect of bolts in the stabilization of joints and yielding soft rocks.

    Jan 1, 1992

  • SME-ICGCM
    Development of a New Roof Bolt Technology to Improve Gate- Road Performance

    By Vince Caggiano

    The newly developed Hilti OneStep roof bolt combines the standard 5-step anchoring process (i.e. drilling, transfer of drill steel, insertion of resin, insertion of rod and tightening) into one easy o

    Jan 1, 2005

  • SME-ICGCM
    Field Measurements Of Overburden And Chain Pillar Response To Longwall Mining (22054dce-c5fa-459f-94f1-b6ef58bd87bf)

    By Daniel W. H. Su

    This paper presents the results of an extensive geomechanical testing and monitoring program conducted at a longwall panel. The field program included the monitoring of roof caving sequence and mechan

    Jan 1, 1987

  • SME-ICGCM
    A Comparison of Numerical Methods and Analytical Methods in Determination of Tunnel Walls Displacement ? A Case Study

    By Behdeen Oraee-Mirzamani

    Tunnel stability has an important role in the production process of an underground coal mine. There are various methods for analysing tunnel stability, such as numerical methods and analytical methods

    Jan 1, 2013

  • SME-ICGCM
    Stability Evaluation Of Alternative Designs Of Drift-And-Fill Stoping In Zhaoyuan Gold Mine, P. R. China

    By Xianming Zhou

    Mining economics is such that too conservative in safety will result in a considerable penalty in mining cost. However, initial planning and design of a mining project often must be done without compl

    Jan 1, 1989

  • SME-ICGCM
    Rock Fracture, Caving and Interaction of Face Supports Under Different Geological Environments. Experience from Australian Coal Mine

    By Winston Gale

    This paper is presents a summary of recent investigations into fracture and caving about longwall panels. The results of these investigations indicate that rock failure initiates well ahead of the lon

    Jan 1, 2004

  • SME-ICGCM
    Elasto-Plastic Finite Element Structural Stability Analysis Of Room And Pillar Mine Workings (1726bb0c-5e63-4f04-a636-538432c37ec9)

    By S. Bensehamdi

    An advanced elasto-plastic finite element model adopting a modified Von Mises yielding criterion was used to simulate progressive failure of the rock strata surrounding a room and pillar mine structur

    Jan 1, 1992

  • SME-ICGCM
    Studies on Distribution Pattern of and Methane Migration Mechanism in the Mining-Induced Fracture Zones in Overburden Strata

    By Shugang Li

    The layout and efficiency of the degasification system is heavily dependent on the distribution of and the methane migrating mechanism in the mining induced fractures in the overburden strata In this

    Jan 1, 2005

  • SME-ICGCM
    The NIOSH Shield Hydraulics Inspection and Evaluation of Leg Data (Shield) Computer Program (7f22bea3-620b-4bd0-a4b9-04ee2b01eea7)

    By Thomas Barczak

    Longwall shields provide essential ground control in Iongwall mining, yet a high percentage of shields are operating at less than peak capacity and many at well below the rated support capacity due to

    Jan 1, 2002

  • SME-ICGCM
    Research on the Characteristics of Mine Pressure and Overlying Strata Movement in Downward Mining Longwall Panels in Steeply Dipping Seams

    By Jingyi Cheng

    Many longwall panels in China are laid out along the dip direction such that the direction of longwall retreat mining is along the strike direction of coal seams. Downward mining longwall panels in st

    Jan 1, 2013

  • SME-ICGCM
    Finite Element Modeling Of Subsidence Induced By Underground Coal Mining: The Influence Of Material Nonlinearity And Shearing Along Existing Planes Of Weakness

    By Daniel W. H. Su

    Surface subsidence induced by multiple-panel coal extraction was calculated with finite element stress analysis. The use of nonlinear material behavior and GAP elements, which provide a realistic repr

    Jan 1, 1990

  • SME-ICGCM
    The Utilisation of Numerical Modelling to Predict Water and Gas Flows Around Longwall Panels; Two Case Studies from the UK Coal Mining Industry

    By D. J. Reddish

    This paper illustrates how numerical modelling has been utilised to predict water and gas pathways around active longwall panels using two case studies. This information has proved invaluable m the de

    Jan 1, 2003

  • SME-ICGCM
    Correlation Between The Effect Of Confining Pressure On Compressive Strength In Triaxial Tests And The Effect Of Diameter/Height Ratio On Compressive Strength In Unconfined Compression Tests

    By Venkata S. Vutukuri

    Compressive strength of cylindrical specimens of a model material and sandstone with various diameter/height (d/h) ratios was determined in unconfined compression tests. It was observed that the compr

    Jan 1, 1993