Backfilling of shafts XII and 2 on the grounds of the Zollverein World Heritage Site in Essen/Germany began in spring 2023. The shaft work is now being completed (Figure 1). In consultation with authorities, politicians and scientists, RAG Aktiengesellschaft, Essen, has developed a concept for the long-term optimisation of mine water management in the Ruhr area. To this end, water ...
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