tunnel; (mining) gallery; level; shaft; pit
abandoned mine; disused mine
coal mine; (coal) pit; colliery; coal-mine shaft
shaft (e.g. in a mine); pit
within a pit or (mine) shaft
entrance into drift or pit
burning books on the Chinese classics and burying Confucian scholars alive
burying Confucian scholars alive
winze (mining); well (oil, gas)