Browsing by Subject "overburden dump"

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Access status: Open Access ,
Model przepływu wód podziemnych dla zwałowiska nadkładu z odkrywkowej kopalni węgla brunatnego
(2008) Wiencław, Edward; Marek, Zbigniew; Kaczarewski, Tadeusz; Koda, Eugeniusz
The paper presents the example of numerical modelling of groundwater flow during dewatering of excavation in the lignite open pit mine. Sufficient cubic capacity for overburden soils is necessary to continue operation of the lignite mine in Turów site. The FEMWATER model of the overburden bank from the lignite open pit mine consists computer solution of groundwater flow for the design of the overburden heap in this site. The basis of numerical solution was the problem of groundwater flow described by Richard's equation, using 3-D finite elements method. The main, sophisticated purpose of the modelling carried out, taking into consideration this model, was the prediction of underflooding of the overburden bank and its surroundings. Modelling test results of the groundwater flow will be applied for extension of dewatering system and the design of monitoring system of potential threat of the overburden bank stability, constructed in the close vicinity of protected objects. The main objects which need special protection during overburden bank construction and dewatering are: the bank of Nysa Łużycka River, international road and industrial infrastructure around TURÓW lignite open mine. The modelling results also will be applied in designing of adequate technical safety solutions to protect these objects.
Access status: Open Access ,
Osiadanie gruntów zwałowanych w poeksploatacyjnym wyrobisku odkrywkowym w wyniku odbudowy zwierciadła wody gruntowej
(Wydawnictwa AGH, 2008) Woźniak, Henryk; Borecka, Aleksandra ; Kaczmarczyk, Robert
Common remediation method of inactive open pits is a partial or complete infilling with dump soil derived from removed overburden. A problems which rises during such remediation is a significant settlement of soils caused by its high compressibility. Recognition of compressibility and settlement enables the proper design of both required and final depths of the fill and allows to balance the required and existing volumes of dumped material. Authors proposed a calculation method for settlement of dumped fill deposited in an inactive open pit, which includes self-weight settlement and collapse settlement caused by recovery of groundwater table. The proposed calculation is based upon solution given by Nwabuokei & Lovell (1985) for settlement of fills composed of compacted soil. Examples of calculations are presented in which both the compressibility and collapse potential parameters were determined from authors' own studies.