abandoned
black
cave
cavern
coal
copper
corridor
dark
death
deposit
dig
dirty
disaster
end
entrance
excavate
fear
geology
gold
horizontal
industrial
industry
inside
interior
iron
light
mantrip
metal
mine
miner
mineral
nobody
old
orebody
perspective
railway
rock
shaft
spooky
stone
train
tunnel
tunneling
underpass
way
work
worker