Answer: STOPES

AnswerCrossword Clue
STOPESMining excavations.
STOPESMine shaft excavations.
STOPESMine excavations.
STOPESMining levels.
STOPESMine shafts
STOPESSteplike excavations
stopesto mine or work by stopes
stopesSTOPE, to excavate in layers
stopesany excavation made in a mine, esp. from a steeply inclined vein, to remove the ore that has been rendered accessible by the shafts and drifts