Analysis of the planned post-mining landscape of MiBRAG's open-cast mines with regard to a possible environmental impact of alteration processes in mixed dumps

摘要

In recent years increasing knowledge has been gained with regard to hydro- and geochemical alteration processes in overburden dumps and their impact on groundwater quality in lignite mining and reclamation operations associated with post-mining landscapes in Germany. The questions of how alteration processes affect the environment and which opportunities exist to actively influence the dumping process in order to counteract any possible negative impact of the alteration processes,have been investigated at the MIBRAG mines. Investigations focus on the impact caused by oxidation of sulfur containing minerals. The following analysis of the situation at United Schleenhain mine reflects the work reached so far for MiBRAG's mines and presents a future outlook. The evaluation methodology presented in this paper can also be applied to the Profen mine.