deep mining

• shaftNarrow vertical passage
• excavationAct of unearthing
• undergroundBelow ground or countercultural
• oreMetal-bearing rock
• coalCombustible sedimentary rock

tunnel · drilling · extraction · seam · cavern · descent · pithead · darkness · minerals · geology · bedrock · subterranean · bore · ventilation · collapse · canary · headlamp · pickaxe

• mininggold, mines, gold mines, mine, coal
• extractionmining, excavation, distillation, filtration, extraction
• Coal Miningcoal mines, miners, coal seam, coal miners, underground mines
• hoistschain hoists, winches, winder, elevators, lifts