mine shaft

abandoned adit architecture black blue building buttress coal coalmine colliery copper decay derelict dig dirt disused elevator energy engineer engineering entrance excavate extracting extractive frame gear geology gold head headframe headgear heritage historical history hoist industrial industry job lift machine machinery manufacturing metal mill mine miner mineral miners montana old ore pickaxe pioneer pit pithead plant poland power profession reclaim redundant regeneration reinforce retro ruin safety shaft silesia silver skill sky steel tower traditional underground vintage wheel work