Dynamika vývoje chemismu důlních vod na ložisku Rožná

Abstract

The master thesis looks into the issue of the mine water chemistry development of the Rožná uranium deposit. Uranium mining at the Rožná I mine was terminated in 2017, and thus knowledge of the mine water chemical development is important in solving the question of future management of mine water at the moment of termination of mine water pumping. Characteristic rocks of the deposit and selected secondary minerals that may contribute to the final chemistry of mine water were described. This thesis adresses mine waters of dual nature. The first type of mine water was being taken from underground drill holes at designated sampling points since 2015. The second type is mixed mine water taken from rill marks at designated sampling points of individual floors since 1993. Mine water was processed using geochemical modeling in PHREEQc and The Geochemist´s Workbench programs with tabular and graphical outputs. Important in thesis were the calculations of saturation indices, in order to interpret the possibility of precipitation or dissolution of certain types of minerals. These minerals may subsequently participate in the modification and mine water chemistry development at the Rožná deposit.