Hmm. Looked at my Mapillary surveys in 2016 and 2018 - nothing mine related there even before the Lidl was built:
https://www.mapillary.com/app/?pKey=191457449359770

Replaced historic=monument with man_made=mineshaft as the other memorials in the area are pretty obvious (pit tubs, wheels, etc).
https://www.openstreetmap.org/node/6552332485/
Thanks, and Happy Mapping,

James