FILED - 11 June 2018, North Rhine-Westphalia, Bottrop: Miners work at Prosper Haniel colliery at a depth of 1250 metres on an underground seam before coal. Prosper Haniel colliery is the last active coal mine in the Ruhr area. Ruhrkohle AG (RAG) closes the mine at the end of 2018. (Analogue photography due to safety regulations in hard coal mining) (to dpa story: "Schicht im Revier: Steinkohlefцrderung geht nach 150 Jahre zu Ende") Photo: Oliver Berg/dpa