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Browsing by Subject "surface mining"

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  • thumbnail.journal.alt
    Item type:Article, Access status: Open Access ,
    Badania elektromechanicznych zespołów napędowych zwałowarki ZGOT
    (Wydawnictwa AGH, 2009) Anuszczyk, Jan; Jabłoński, Mariusz
    Paper presents the results of laboratory and industrial testing of the caterpillar drives of the loading feeder of the spreader ZGOT-15400.120 working in the strip pit Szczerców of the KWB »Bełchatów« Mine. The electromagnetic and electromechanical transient states in the drive systems have been analysed. A new conception of sensorless steering algorithm modification in the CUVC bord controlling of converter has been introdused. After proposed solution the decrease of motors torque oscilations and mechanical vibrations in the low frequencies range of converter work was obtained.
  • thumbnail.journal.alt
    Item type:Article, Access status: Open Access ,
    Ochrona środowiska wodnego w Nadreńskim Zagłębiu Węgla Brunatnego
    (Wydawnictwa AGH, 2010) Chodak, Marcin; Polak, Krzysztof
    The lignite deposits in the Lower Rhine Basin have advantageous geological conditions but are often located in the vicinity of ecologically valuable areas. In this work we present the examples of activities aimed at minimization of lignite extraction influences on surface waters and wetlands. The presented examples indicate that it is possible to entirely exclude negative effects of open-cast lignite extraction on the surface waters and wetlands.
  • thumbnail.journal.alt
    Item type:Article, Access status: Open Access ,
    Optymalizacja szerokości pasów ochronnych przy odkrywkowej eksploatacji kopalin pospolitych
    (Wydawnictwa AGH, 2009) Batog, Andrzej; Hawrysz, Maciej
    The paper presents the examples of protection area width optimization for the open pit mines for some engineering structures situated in contiguity of the open pit. The possibility of deposit exploitation from the part of protective pillars of power lines and aerial masts was demonstrated. The slope stability during exploitation and at final stage of open pit will be retained. The presented problem is particularly essential for the sand and gravel pits, which deposits are becoming exhausted.