Browsing by Subject "dumping"

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Access status: Open Access ,
Wpływ kształtu zwałowiska zewnętrznego na koszty transportu zwałowanego urobku
(Wydawnictwa AGH, 2011) Zajączkowski, Maciej
Influence of the shape of external dump on the transportation costs was analyzed in the article. In order to do this, three shapes of external dump were defined with the same volume and height, general slope gradient and the location of the transportation ramp. In all three cases the position of center of gravity was determined depending on the received shape of the basis of the dump. Knowing the distance from the center of gravity to the beginning of the transportation ramp, the average road of transportation on the dump was estimated and the elementary energy demand to transporting fixed volume of the overburden. These values make estimation of the transportation costs of the dumping masses possible and show the most profitable shape of external dump considering these costs.
Access status: Open Access ,
Zagadnienia ochrony i dostępu do zasobów węgla brunatnego w złożu Turów w aspekcie zdarzeń powodziowych zaistniałych w sierpniu 2010
(Wydawnictwa AGH, 2011) Sondaj, Leszek; Milkowski, Donat; Wojciechowski, Michał
On the 7th August 2010 there occur torrential rain in Izera Mountains on the territory of Czech Republic and Poland. In these Mountains begins every rivers surrounding mine »Turów«, among other things Nysa Łużycka, Miedzianka and Witka. Great amount of water flowing from the North sides of mountains to cause flash flood. In time of 24 hours to flow down 150 billion litre of water. Such amount of water, cause natural disaster in Bogatynia, Porajów and Sieniawka, destroyed urban infrastructure and tens historic buildings. On the pillar of East side of mine, water broke through the embankments and rush in open pit mine Turów. Additionally significant increase and brimming over caused the violent rainfall of settlings basin on pumping stations, overflow of waters from ditches and their violent flow into the bottom of the excavation causing breaking main draughts belt conveyors and communications. The mine had to stop coal mining. Water to flood open-pit bottom and two working levels and ducked one level dump. On the West side of mine, water from flooding Nysa tried to destroy west embankments. Water broke through the dam (5 millions $m^{3}$) on the Witka River and caused destroy an only access road between Bogatynia (Żytawa Basin ) and the rest of Poland. This report describes the rescue action, liquidation of ravages, recovering flooding coal seams and other protection actions against the flood.