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  • SME-ICGCM
    The Duncan Method of Partial Pillar Extraction at Tasman Mine

    By Kent D. Mctyer

    Mining commenced at Tasman Mine in late 2006. The current method of mining is bord and pillar using continuous minerbolters and shuttle cars for first workings and secondary extraction using mobile ro

    Jan 1, 2011

  • SME-ICGCM
    Geotechnical Constraints On A 6 M Single Pass Longwall

    By Ross W. Seedsman

    The feasibility of 6 m high single pass longwalling has been studied using Newlands Mine as a case study An intensive geological investigation identified a range of hazards but a mine layout was possi

    Jan 1, 1992

  • 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
    Improving Roof Truss Performance

    By James Pile

    Since C.C. White introduced coalmine roof trusses in 1967. many different systems have evolved. Beginning in the mid 1990's, several types of bar/cable truss systems have been introduced. A new a

    Jan 1, 2004

  • SME-ICGCM
    Influence Of Support Capacity And Geometry On Tailgate Support

    By E. Hosca

    Alternative tailgate loading conditions due to conventional and conventional/yield pillar combinations were evaluated to define roof loading. In order to isolate different loading situations, the tail

    Jan 1, 1994

  • SME-ICGCM
    Recent Innovations for Slope Development

    By Tim Burgess

    Patton Mining, LLC and J.H. Fletcher Company recently collaborated and mechanized the sometimes hazardous, and always labor intensive, process of installing standing steel supports during the construc

    Jan 1, 2011

  • SME-ICGCM
    Three-Dimensional Analysis Of Mine Dump Point Stability

    By Radoslaw L. Michalowski

    The operation of mobile mining equipment near the crest of stockpiles and wastedumps often results in localized slope failures. The Bureau of Mines has developed a computer code based on a rigorous li

    Jan 1, 1990

  • SME-ICGCM
    Heat-Imaging Experimental Study Of Reducing Local Gas Accumulation By Rotary Radial Jet

    By S. Q. Yang

    Rotary radial jet improves greatly the pulsing velocity of airflow along each direction everywhere in the entry, intensifies transverse migration of air, eliminates effectively the local gas accumulat

    Jan 1, 2004

  • SME-ICGCM
    Determination Of Plate Size Effect On Ultimate Bearing Capacity Of Weak Floor In Underground Coal Mines Using A Boundary Integral Approach

    By Zhanjing Yu

    In this paper, an equation is developed to characterize the relationship between the UBC and plate size using a boundary integral approach. The equation was validated by the results from mo& than seve

    Jan 1, 1993

  • SME-ICGCM
    Chemical Destressing to Alleviate Rockbursts

    By S. P. Singh

    Destress blasting is commonly used in the mines to minimize the occurrence of rockbursts. The fracturing created by destressing in the vicinity of the face reduces the stress concentration by pushing

    Jan 1, 1987

  • SME-ICGCM
    Surface Flooding-Considerations For Mining Facilities Site Selection

    By Daniel S. Mazzei

    This paper will be a general discussion of surface flooding considerations as they affect mining facilities site selection, based primarily on experience with several such problems with which MSHA&apo

    Jan 1, 1982

  • SME-ICGCM
    Application Of Time Domain Reflectometry To Ground Control

    By Kevin M. Connor, O&apos

    An example application is presented in which Time Domain Reflectometry (TDR) was utilized to monitor roof strata movements during pillar extraction in a potash mine. The study was initiated when Weste

    Jan 1, 1990

  • SME-ICGCM
    Investigation Into Cutting Characteristics Of Indian Coal Seams (bf5c67f9-81c7-4039-8f47-cd39420e2b8e)

    By T. N. Singh

    With a view to producing increased target output every year, Indian coal mining industry is fast moving towards mechanisation but the present approach of mechanisation suffers from lack of standardisa

    Jan 1, 1992

  • SME-ICGCM
    Pillar Sizing

    By Marek J. Mrugala

    Coal strength based on scaled uniaxial compressive strength from the laboratory and back calculations from in-mine observations of pillar stability indicate that material strength scaling rules are op

    Jan 1, 1989

  • SME-ICGCM
    The Effects of Longwall Coal Mining on the Hydrogeology of Southwestern Pennsylvania

    By Megan N. Witkowski

    The purpose of this study is to investigate the susceptibility characteristics of domestic and agricultural water supplies that may be vulnerable to diminution or total loss of supply when active long

    Jan 1, 2011

  • SME-ICGCM
    Utilization of Ground-Penetrating Radar to Determine Roof Competency in Underground Limestone Mines

    By Tim Ross

    J. M. Huber Corporation's Quincey Mine. an underground limestone mine located near Quincy. Illinois, has operated successfully and safely for many years utilizing roof bolts on a very limited bas

    Jan 1, 2002

  • SME-ICGCM
    Comparison of Pillar Strengths Calculated Using Empirical Equations and Finite Elements

    By Aarao de Andrade Lima

    Mechanical properties typical of coal are used in the comparisons of pillar strengths based on finite elements and the empirical equations of Holland-Gaddy, Salamon-Munro, Obert¬Duvall, and Bieniawski

    Jan 1, 1997

  • SME-ICGCM
    Horizontal Stress Control In Underground Coal Mines (1dbd7295-90f8-4003-a003-9120dc19934c)

    By S. M. Matthews

    The magnitude and orientation of the in situ stressfield has been determined as a key factor in controlling the stability of openings for both coal mine development and extraction. Monitoring of roadw

    Jan 1, 1992

  • SME-ICGCM
    Crosshole Seismics: Applications In Mining

    By Richard E. Thill

    Two Cross-borehole systems were developed by the Bureau of Mines, one operating at a central frequency of 20 kHz for close-in spacing between boreholes (2-20m) and another operating at a dominant freq

    Jan 1, 1989

  • SME-ICGCM
    Investigation of Subsidence Over AML: A Case Study

    By P. M. Lin

    The problem of abandoned mine land (AML) subsidence is getting more severe because abandoned mine lands which used to be located in the remote areas have been gradually developed into suburbs or even

    Jan 1, 1987