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Application of the Terrestrial 3D Laser Scanning in Room and Pillar Trial at CSM Mine

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    0496339 - ÚGN 2019 RIV SG eng C - Conference Paper (international conference)
    Kukutsch, Radovan - Kajzar, Vlastimil - Waclawik, Petr - Němčík, J.
    Application of the Terrestrial 3D Laser Scanning in Room and Pillar Trial at CSM Mine.
    10th Asian Rock Mechanics Symposium - The ISRM International Symposium for 2018. Singapur: ISRM Singapur, 2018. ISBN 978-981-11-9003-2.
    [ARMS 10 - Asian Rock Mechanics Symposium - The ISRM International Symposium for 2018 /10./. Singapur (SG), 29.10.2018-03.11.2018]
    R&D Projects: GA MŠMT(CZ) LO1406
    Institutional support: RVO:68145535
    Keywords : 3D laser scanning * room and pillar * roadways deformation
    OECD category: Mechanical engineering

    3D laser scanning is a unique technology used for the description and subsequent modeling of real
    shape of spatially complex underground mining environment. Groundbreaking was its application in
    the pilot deployment of the Room and Pillar method at the CSM mine, where this method was used
    for the first time within the Upper Silesian Coal Basin, also known to have one of the most difficult
    mining and geomechanical conditions in the world. Very difficult mining conditions at depth over 800
    m warranted searching for complex geotechnical tool or method that would capture all changes
    without distortion. Despite some shortcomings, 3D laser scanning was selected, although there is still
    no suitable device for dusty and humid mining environment. During the pillar development phase,
    comprehensive geotechnical monitoring was undertaken including the frequent scanning of pillar
    movement using 3D laser scanning technology. Based on repeated time-separated measurements,
    spatio-temporal analyses of deformation changes during ongoing mining were carried out. These
    analyses captured dynamic changes in coal rib, roof and floor movements of designated roadways
    while developing the pillar panel. In addition, time dependent long term post-mining measurements
    quantified additional strata movements within the panel enabling assessment of the long term pillar
    and mine roadway stability. The time-lapse scanning indicated variable pillar rib movement with
    maximum measured displacements of 60 cm. The scans indicated that in most cases, the bottom of the
    seam displaced more than the top of the rib side due to low floor strength causing large floor heave of
    up to 100 cm. During the 3-year monitoring, more than 2 billion spatial points were captured that can
    be used for further analysis.
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    UGN_0496339.pdf32.8 MBAuthor’s postprintopen-access
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