Báňsko-technologické aspekty uzavírání dolu Rožná I se zaměřením na problematiku důlních vod

Abstract

This doctoral thesis addresses the issue of underground mine closure and contributes some aspects to this broad topic. In experimental research on the backfilling of the main mine workings, the compressive loads on the critical nodes at the contact of the workings with the horizontal workings and the effect of horizontal pressure on the supporting dam structure are investigated. During backfilling, it is necessary to consider the possibility of controlling the subsequent flooding of the mine and leaving objects that can allow various hydrogeochemical measurements. In particular, the water pit is considered the main mine workings for monitoring the mine flooding. Therefore, the possibilities of monitoring qualitative and quantitative parameters of mine water during mine flooding are addressed in the thesis, followed by the design of this monitoring on the case site of Rožná I Mine. After the flooding of the deposit, it is necessary to continuously remove insoluble substances and heavy metal elements from these mine waters. These waters can then be discharged into the local watercourse. The author proposes a way to prevent the discharge of cleaned mine water into the watercourse without any use and suggests using the thermal parameters of these waters for central district heating. The technological process of decontamination will include the discharge of cleaned water to the central boiler plant in Dolní Rožínka. Three variants of the central district heating are proposed, two of which have heat pumps located in the central boiler plant, from where the heat is transferred to the end-users in the adjacent housing estate. The third option considers the installation of individual heat pumps at the foot of the customer premises sized for the required demand. These technical options are complemented by an economic and investment model, thus suggesting a realistic possibility to apply one of these options.