Paper Title
Current Issues of The Rozna I Mine Dewatering Due to Its Flooding Process, Czech Republic
Abstract
This paper describes the current non mining state of the uranium mine Rozna I in the central part of the Czech Republic. The
focus is the conception of dewatering 1 200 m deep mine by main pumping stations which are inset with centrifugal pumps
and leveling sumps. Mine water is pumped by multi-staged pumping system through discharge lines towards the surface,
where the water is further decontaminated. Cascade pumping system is fully automated thanks to programmable automatic
machines by the company Siemens with subsequent visualization at the central control center at Rozna I. Current state will
be changed depending on reconfiguration of the mine due to partial flooding of the mine. Partial flooding will be done from
12th to 24th level. Second part of this paper describes technical and conceptual proposal for a change of the pumping system
and a new way of pumping. Reusing of the pumping units, automatic machines and other appliances from the dismantled
main pumping stations is considered. A new submersible pumping station was devised for the R7S shaft, which will be
critical for keeping the mine water in the retention space below level 12. Described issues are bound by corresponding
legislative of the Czech Republic. To conclude, a situation, which will occur as soon as the mine is fully flooded and the
mine complex is completely abandoned, is contemplated.
Keywords - Mine Water; Dewatering; Pumping; Flooding; Rozna; Uranium Mine