What does 炭鉱 mean?
炭鉱 is a Japanese noun meaning “coal mine, coal pit” in English. It is written as 炭鉱 in kanji, たんこう in hiragana, and tankou in romaji. This word is part of JLPT N2 vocabulary.
Example sentence
あの支部は炭鉱労働組合に属している。
That branch is affiliated to the miners' union.