Coal Mine, Coal Pit
noun
Charcoal mineral has been found! Time to dig a coal mine or coal pit to retrieve it!
たんこう
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.
うーん。この炭鉱が閉山するってのは、本当に残念ですね。
Well, it is really disappointing that this coal mine is going to be closed.