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Seismic activity of hard coal longwall mining in protective shaft pillar near closed room and pillar panel

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    0546794 - ÚGN 2022 RIV GB eng C - Conference Paper (international conference)
    Koníček, Petr - Kajzar, Vlastimil - Schreiber, J.
    Seismic activity of hard coal longwall mining in protective shaft pillar near closed room and pillar panel.
    IOP Conference Series: Earth and Environmental Science. Vol. 833. Bristol: IOP Publishing Ltd., 2021, č. článku 012087. ISSN 1755-1307. E-ISSN 1755-1315.
    [EUROCK 2021 Conference on Rock Mechanics and Rock Engineering from Theory to Practice. Turin (IT), 20.09.2021-25.09.2021]
    Institutional support: RVO:68145535
    Keywords : seismic activity * hard coal * longwall mining * shaft pillar * room and pillar panel
    OECD category: Mining and mineral processing

    Monitoring of seismic activity during mining in the Upper Silesian Coal Basin is a part of rockburst prevention system. System is composed from two parts - seismological (SL) and seismoacoustic (SA) monitoring. Evaluation of data from both systems allows describing stress deformation process during mining and evaluation of rockburst mitigation techniques effectiveness. Described longwall was mining in a protective pillar after two trial room and pillar (R&P) testing panels were completed. Evaluation of seismic activity was carried out by special software tool which allows simulating daily advance of mining and registered seismic activity. Different mining stages were identified for evaluation of seismic activity (e.g. weekly and daily summary graph of seismic activity, Benioff graph, event rate graph, energy vs time graph etc.). Evaluation of seismic activity provides many interesting results, mainly in the area of longwall panel termination when one pillar of the R&P trial was impacted by the longwall. This work presents seismic activity analysis, detailed site conditions and implemented active rockburst measures and its effectiveness. Analysis of seismic activity allows to formulate conclusions for longwall mining operations and evaluation of seismic activity in unfavourable geomechanical conditions within the area of protective shaft pillar border
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    UGN_0546794.pdf61.4 MBPublisher’s postprintopen-access
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