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  • SME-ICGCM
    Stability Control of Clusters of Deep Openings Around Shaft Bottom and Theory of Rock Deformation

    By Yanfa Gao

    Clusters of underground openings were developed around the shaft bottom of Tangshan Mine. They were deep and located in soft rock strata. After development, those openings have been subjected to consi

    Jan 1, 2002

  • SME-ICGCM
    Study Of The Impact Of Mining Under Massive Roof At Datong Coal Mines, China (7e96e5f6-0b09-4bad-866d-2ffcd02d33be)

    By Song Yong Jin

    The Jurassic coals at Datong are characterised by their strong, massive sandstone and conglomerate roofs which fail suddenly over large areas, crushing pillars and creating destructive windblasts, col

    Jan 1, 1992

  • SME-ICGCM
    Laboratory Testing of Rib Straps

    By E. Bane Kroeger

    Rib failure is a hazard that has resulted in many injuries and fatalities in underground coal mines, especially in soft coal seams. Conventional rib control methods including rib boarding, shotcreting

    Jan 1, 2004

  • SME-ICGCM
    Stress Analysis and Support Design for Longwall Mine-Through Entries (A Case Study)

    By Keith Heasley

    An eastern longwall mine was required to mine through a set of three entries located midway down the length of a panel. Of course, the mine desired to design a successful support system for the mine-t

    Jan 1, 2003

  • SME-ICGCM
    Mechanisms of Chimney Subsidence Over Abandoned Coal Mines

    By Mario G. Karfakis

    Mining related subsidence is a major concern over abandoned shallow coal mines. Many of the subsidence prone areas are presently used or will be used in the future for residential housing development.

    Jan 1, 1987

  • SME-ICGCM
    The Strong Outbursts of Coal and Gas in Coal Mines in China

    By S. N. Zhow

    China has at least 200 collieries suffering from the problem of instantaneous outbursts of coal and gas. The strong outbursts often occurred in active tectonic lanes and areas of high stress concentra

    Jan 1, 1987

  • SME-ICGCM
    Behavioral Aspects of Roof/Rib Injuries--Implications for Training Utilizing Stereoscopic Photography

    By Edward A. Barrett

    A significant number of injuries resulting from fa118 of roof and rib may be avoided by modifying the reactive behavior of miners as they encounter potentially hazardous ground conditions. In 1984-85,

    Jan 1, 1986

  • SME-ICGCM
    Controlled Thrust And Torque Placement Of Mechanical Anchor Bolts And Their Relationship To Improved Roof Control

    By Anil Mahyera

    Under contract to the Bureau of Mines, a roofbolting machine has been developed which will: control torque on the bolthead to within 4 percent of a set point, control thrust to a low level (150 lbf),

    Jan 1, 1981

  • SME-ICGCM
    Determination of Effective Column Lengths for Resin-Grouted Roof Bolts

    By W. A. Cincilla

    The use of resin-grouted rock anchors continues to gain popularity in underground wall mines in the United States. It is estimated that during 1985, more than 30% and as many as 35% of all roof bolts

    Jan 1, 1986

  • SME-ICGCM
    Comparative Analysis Of Longwall Gateroad Designs In Four Deep, Bump-Prone Western U.S. Coal Mines

    By Matthew J. DeMarco

    Research personnel at the U.S. Bureau of Mines have conducted longwall gate stability studies at four western U.S. mines attempting to employ yield pillars for improved ground conditions. Located in t

    Jan 1, 1993

  • SME-ICGCM
    Effect of High Horizontal Stress on Coal Mine Entry Intersection Stability

    By K. Hanna

    This manuscript describes an extensive ground control study at the Inland Steel No. 2 Mine near McLeansboro, IL, conducted by the U.S. Department of the Interior's Bureau of Mines (USEM) in coope

    Jan 1, 1986

  • SME-ICGCM
    Applications Of Reflection Seismics To Mapping Coal Seam Structure And Discontinuities

    By T. L. Dobecki

    As a means of demonstrating the effectiveness of reflection seismology in determining continuity of coal seams, three U. S. field projects are reviewed. The three projects involve coals of varied thic

    Jan 1, 1981

  • SME-ICGCM
    Floor Heave in Shallow Room-and-Pillar Mining

    By André Zingano

    This paper analyses possible causes for floor heaving in room-and-pillar coal mining. The coal mines are in the southern part of Brazil, where the Barro Branco Coal Seam varies in depth from 20m to 40

    Jan 1, 2002

  • SME-ICGCM
    Longwall Stability Analysis Of A Deep, Bump-Prone Western Coal Mine-Case Study

    By Lance R. Barron

    The U.S. Bureau of Mines, in cooperation with a central Utah coal .mine operator, began a study in July 1988 into longwall gateroad designs applicable to deep, bump- prone mine conditions. Prior to th

    Jan 1, 1990

  • SME-ICGCM
    The Influence Of Stream Valleys On Coal Mine Ground Control

    By John L. Hill

    Over 50 mines of the Appalachian and Illinois Basins are presently experiencing poor ground conditions believed to be caused by overlying stream valleys. The Bureau of Mines is conducting research int

    Jan 1, 1988

  • SME-ICGCM
    An Approach To Identifying Geological Properties From Roof Bolter Drilling Parameters

    By Gerald I. Finfinger

    Identifying the properties of overlying rocks in underground mining operations is important to ensure the appropriate roof support design is used to maintain stability of the mine entries. Recently J.

    Jan 1, 2000

  • SME-ICGCM
    Research on the Geological Dynamic Conditions and Forecast for Rock Bursts

    By Weihua Song, Hongwei Zhang, Feng Zhu, Sheng Li, Guoshui Tang

    "Rock burst is one of the most serious dynamic disasters in coal mining. Rock burst prevention involves two difficult tasks: systematically evaluating the occurrence conditions and effectively forecas

    Jan 1, 2015

  • SME-ICGCM
    How to Design an Efficient Roof Bolting Plan Based on Simple In-Mine Measurements

    By C. J. H. Brest van Kempen

    The techniques developed should provide a useful tool, not only during the initial formulation of a suitable bolting plan for a new section, but also for periodic check¬ing on the utilization factor

    Jan 1, 1986

  • 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
    Application of Regional Subspace Detection to Identify Mining Related Seismicity

    By Keith D. Koper, Kris L. Pankow, Derrick J. A. Chambers, Michael K. McCarter

    "In a mining environment, high quality seismic event catalogs are often useful in interpreting local stress states and identifying areas with elevated ground control risk. Installation, operation, and

    Jan 1, 2015