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  • SME-ICGCM
    A Novel Ground Control Program at Plateau Mining Company

    By Hamid Maleki

    A novel ground control program has been developed at Plateau Mining Company through five years of geotechnical investigations. The study was initiated to determine the causes for roof stability proble

    Jan 1, 1987

  • SME-ICGCM
    Some Technical Considerations When Mining Under Bodies Of Water

    By John W. Fredland

    Conducting mining operations under a body of Water can create hazardous conditions for miners. The potential for a sudden inrush must be considered and abnormal ground control conditions can be encoun

    Jan 1, 1982

  • SME-ICGCM
    Analysis Of Practical Ground Control Issues In Highwall Mining

    By R. Karl Zipf

    Highwall mining is an important coal mining method. Upwards of 60 highwall miners are presently in operation, and they may account for approximately 4% of total U.S. coal production. A review of the M

    Jan 1, 2004

  • SME-ICGCM
    Re-Use of Rectangular Bolted Roadways in a Cover Depth > 1000 M

    By Klaus Opolony

    The German coal industry operates a multi-seam extraction system, with average working depths currently around 1,000 meters. The gate roads serving the longwalls are often used for a second time - a p

    Jan 1, 2002

  • SME-ICGCM
    Vertical Stress Redistribution Around A Retreating Longwall Face End

    By D. A. Payne

    Large excavations, such as Iongwall panels, result in extensive vertical stress redistribution in the surrounding strata. The large abutment stresses developed may produce damage to pre-existing or pl

    Jan 1, 1995

  • SME-ICGCM
    Numerical Modeling Of Longwalls In Deep Coal Mines

    By Salah Badr

    Longwall mine layouts with their entries, chain pillars, face support systems, advancing mining faces and compacting gobs represent a geomechanically complex mining operation. Geomechanical aspects ar

    Jan 1, 2003

  • SME-ICGCM
    Extraction Ratio In Thin Seams Assuring No Surface Subsidence

    By Kot F. v. Unrug

    The depletion of thicker coal reserves has resulted in the thinner seams being economically attractive. Surface protection against subsidence limits the extraction ratio to 50% for the room and pillar

    Jan 1, 2001

  • SME-ICGCM
    Tailgate Support Evaluation at Plateau Mining Company

    By H. N. Maleki

    This paper presents a field evaluation of six tailgate secondary support systems, with the objective of optimizing support efficiency for maintaining open gate roads. Support systems consisted of a co

    Jan 1, 1986

  • SME-ICGCM
    GIS Supported Evaluation of Surface Level Impacts Due to Abandoned Near?Surface Mine Locations

    By Alexander Kattner

    Surface fractures in urbanized areas show the risk potential of near-surface mining. This kind of mining subsidence damage occurs mainly in areas where hard coal was mined near the surface with very l

    Jan 1, 2011

  • SME-ICGCM
    Study of Ground Movement Over a Longwall Mine

    By A. W. Khair

    This paper presents an analysis of ground movements recorded from longwall operations in the Northern Appalachian region in West Virginia. The site chosen for the investigation was selected due to var

    Jan 1, 1987

  • SME-ICGCM
    Mathematical Modeling Of Strong Roof Beds In Longwall Mining

    By Xiaolin Wu

    Most coal bump occurrences in the U.S. are directly related to mining operations under strong roofs. An understanding of the behavior of bridging or cantilevering strong roofs over working longwall fa

    Jan 1, 1993

  • SME-ICGCM
    Overcoring Techniques to Assess in Situ Corrosion of Galvanised Friction Bolts

    The effects of corrosion upon the load bearing capacity and ultimate tensile strength of galvanised friction bolts were determined. Corrosion rates were measured by overcoring of the reinforcement ele

    Jan 1, 2005

  • SME-ICGCM
    Analysis Of Cable Bolt Performance Using Numerical Modeling

    By M. Bouteldja

    A finite element modelling approach is developed for the evaluation of the mechanical performance of cable bolts supports in underground mine structures. The modelling approach permits the simulation

    Jan 1, 1999

  • SME-ICGCM
    Changes In Seismic Measurements With Blast Induced Fracturing: A Field Experiment

    By Clifford J. Roblee

    In this paper, various seismic indicators are evaluated for ability to discern fractures induced into a rock mass by blasting. This is accomplished by presenting results from in situ crosshole seismic

    Jan 1, 1989

  • SME-ICGCM
    Assessment of the Dynamic Loads Effect on Underground Mines Supports

    By Kazem Oraee-Mirzamani

    Blasting operations generate seismic effects in underground mines. These effects apply additional dynamic loads on the support system, which should bear both static and dynamic loads. Static loads are

    Jan 1, 2011

  • SME-ICGCM
    Field Testing of a Real Time Roof Mapping Drilling Display System in a Limestone Mine

    By Craig Collins

    The objective was to develop a Real Time Drilling Display System for Rotary Roof Bolting using Analyzing Software to display mapped holes as they are being drilled in real time. The Analyzing Softw

    Jan 1, 2004

  • SME-ICGCM
    The Slope Stability Assessment in the Wall Overlooking the Sungun Copper Concentrator Plan

    By S. Mehrdad Heidari

    The concentrator plant is located near a very high (105m), large (- 500m) and steep (a, > 45' ) wall. Geologically, the wall was composed of very complicated formations and broad range of soils a

    Jan 1, 2005

  • SME-ICGCM
    Management of the Dynamic Phenomena of Rock Pressure in Underground Mines

    By Vladimir I. Klishin

    Complex method of ruling of rock pressure is considered in conditions of rapid roof subsidence. The purpose of this method is elaboration of emergency devices into hydraulic props. Also method of unlo

    Jan 1, 1997

  • SME-ICGCM
    Effect Of Longwall Mining Subsidence On The Stability Of Surface Slopes

    By John J. Bowders

    The stability of surface slopes undergoing subsidence due to longwall mining was investigated to examine the effect the subsidence had on the stability of the slopes. Stability analyses were performed

    Jan 1, 1988

  • SME-ICGCM
    Prediction Of Rock Cutting Performance Using Fracture Mechanics Principles - A Review (0b1a12ed-9606-4d46-b68d-eea006d52e76)

    By Gexin Sun

    This paper overviews the recent research progress in predicting cutting performance using fracture mechanics principles. It is emphasised that rock fragmentation due to cutting is mainly a process of

    Jan 1, 1992