Browsing by Author "Milkowski, Donat"

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Access status: Open Access ,
Zabezpieczenie i monitoring osuwisk powstałych na Zboczu Północnym wyrobiska odkrywkowego BOT KWB Turów SA
(2008) Milkowski, Donat; Górecka, Anna; Wójcicka-Milewska, Małgorzata
The open pit mine Turów excavates brown coal in a very difficult geological and geotechnical conditions. The most hazardous events for the mine, there are landslides of the slopes and dumps. In years 1993-2007, four landslide arised on North Slope of the mine. This paper describes methods of prevention of slopes destabilization, to allows safe work of excavators and conveyors in the close to the landslides areas. The surface displacements were measured by GPS, deep-seated displacements were measured by inclinometer probe. Geostatic sounding were also performed at regular intervals. Frequency of measurements increased, when excavation was close to the hazardous area. The results of geotechnical analyses, geostatic calculations, sizes and velocities of displacements on the landslides areas are shown in this paper.
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.