坑

within a pit or (mine) shaft

tunnel

closure of a mine

mine accident

entrance into drift or pit

out of the pit

mine timbers

gold mine

shaft (e.g. in a mine)

winze (mining)

miner

opening of mine

underground mining

drift (mining)

coal miner

silver mine

pilot tunnel

adit

drift (mining)

mine-pit bottom

test pit

salt mine

underground coal mine

shaft

inclined shaft

pithead

pit (esp. of a mine)

burning books on the Chinese classics and burying Confucian scholars alive (Qin dynasty thought suppression campaign)

burying Confucian scholars alive