Browsing by Subject "brown coal mining"

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Access status: Open Access ,
Wpływ głębokiej eksploatacji węgla brunatnego na zmiany środowiska wodnego w rejonie Kopalni »Bełchatów«
(2007) Motyka, Jacek; Czop, Mariusz; Jończyk, Waldemar; Stachowicz, Zbigniew; Jończyk, Ilona; Martyniak, Renata
Brown coal exploration in the Bełchtów open-pit is connected with intensive and deep drainage of the groundwater from Quaternary, Tertiary and also Cretaceous-Jurassic aquifers. Drainage of the high permeable aquifers has led to the formation of the extensive zone of the hydrodynamical changes of water environment. Bełchatów open-pit cone of depression has an a area of about 450 $km^{2}$. Within central part of this cone in the vicinity of the Bełchatów open-pit, groundwater table was highly lowered, on the order of tens metres. The next influence of the mining activity in Bełchatów open-pit is connected with changes in surface water budget, mainly in decreasing in groundwater recharge of the cachtments. Drainage of the groundwater is a reason for formation of the anthropogenic, modern vadose zone with availability of the oxygen. Groundwater quality deterioration within cone of depression is connected with geochemical processes of the sulphide minerals oxidation, buffering of the acid mine drainage and formation of the highly soluble secondary sulphate minerals and also occurrence of the Na-CI groundwater in the »Dębina« salt dome area. Monitoring system of the water environment in the vicinity of Bełchatów open-pit gave the possibility for observation of the water environment and also for planning of the remediation scenarios.