Repository logo

Browsing by Subject "mining bumps"

Filter results by typing the first few letters
Now showing 1 - 1 of 1
  • thumbnail.journal.alt
    Item type:Article, Access status: Open Access ,
    Badania sejsmiczne dla oceny zagrożenia tąpaniami w nieodprężonym filarze w partii południowej w KWK »Mysłowice-Wesoła« - Ruch »Mysłowice«
    (Wydawnictwa AGH, 2011) Wojtynek, Józef; Szuścik, Jacek; Kowalczyk, Zbigniew; Ptak, Mariusz; Frej, Adam
    The results of seismic investigation performed in the area of pillar in coal mine »Mysłowice–Wesoła« Part »Mysłowice« are presented. Pillar region is a zone of high seismic activity. Seismic activity is caused by former and present coal seams exploitation. The seismic hazard were diagnosed by geophysical research of the geotechnical properties of the coal seam and sandstone in the coal seam roof. Geotomography was performed cross the galleries in the same coal seam in horizontal plane and cross seams in vertical plane, exploring sandstone between coal seam no 418 and 501/1. Based on results of measurement, ability of roof rocks to generate rock bumps and stress condition in coal seam were recognized as well as seismic hazard. To prevent seismic bumps the controlled explosion were carried out in boreholes drilled in coal seam and in layer of sandstone in the vicinity of major transport galleries crossing the pillar. Repeated seismic measurements were used to assess the effectiveness of prevention and assessment of the state of stress in coal seam after prevention also to current seismic risk assessment. It was found the effectiveness of the prevention and reduction of seismic hazard.