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Browsing by Subject "goafs"

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  • thumbnail.journal.alt
    Item type:Article, Access status: Open Access ,
    Profilaktyka tąpaniowa stosowana podczas eksploatacji rudy miedzi w warunkach skrępowanych na przykładzie rozcinki złoża w polu G O/ZG Polkowice-Sieroszowice
    (Wydawnictwa AGH, 2011) Matusz, Czesław; Kobziński, Jan; Tekieli, Grzegorz
    The G mining area of Polkowice-Sieroszowice mine is located in so called Polkowice-Wschodnie region, where after the shafts P-III, P-IV liquidation, were left for excavation reserves until now bound in created for them protective pillar. In the years 2007-2010 the excavated deposit was located within the G mining area. This mining area is marked with the III degree of seismic activity/rock burst hazard and the existing hazard is really high. In the final stage of this mining area excavation due to the occurred rock bursts and accidents, the mine was forced to excavate with the exploitation front moving towards the goaf area. Because of the very high rock bursts hazard some means were undertaken to decrease the hazard by using special and not used until now means of prevention. These were the simultaneously implemented: very thin technological pillars, deep breaking of the compact sandstones in the floors of the headings by blasting works, as well as locating ore (backfilling) in some of the excavation headings to limit the deformation over the mined out area. Thanks to the used means of prevention and current designing changes it was possible to do the panelling for the rest of the deposit in the G mining area.