Forwarding anonymous report from #Mapy.cz user, please verify:

Zeche Zollverein 4/5/11 (pit 4/5/11) and Schacht 4/5/11 (well 4/5/11) no longer exist here (mining discontinued in 1967). The only existing building of Zeche Zollverein in this area is the Triple Z building. 

https://www.openstreetmap.org/way/23032938
https://www.openstreetmap.org/way/433077429
https://www.openstreetmap.org/way/433077431
https://www.openstreetmap.org/node/3682041741