采掘

cǎijué

采掘 — cǎijué

to excavate; to extract (ore)
他们开始在矿区大规模采掘铁矿。 tāmen kāishǐ zài kuàngqū dàguīmó cǎijué tiěkuàng — They began large-scale excavations to extract iron ore in the mining area.