A short story from the podcast with my granddad https://jeena.net/pods/6
As a German teenager (17), during the winter 1945, he got deported to the Lidievka colliery in Donetsk (now Ukraina) to drain it, because either the Germans or the Russians flooded it.
He had to work in the mine for 9 months. He had to shovel six wagons of mud per day and got 1kg corn bread and (thin) soup 3 times a day.
I founda picture of the colliery: https://www.viktormacha.com/nejnovejsi/lidievka-colliery-donetsk-donbas-1545.html