Jōyō kanji, Taught in junior high
JLPT level: N1
2040 of 2500 most used kanji in newspapers
Stroke count: 7
Meaning: pit, hole
Kunyomi:
Onyomi: コウ
Composition: 土 亢
Radical: 土
Meaning: earth
坑 (コウ) pit (esp. of a mine)
坑口 (コウコウ) pithead, minehead
廃坑 (ハイコウ) closure of a mine, abandoned mine, disused mine
開坑 (カイコウ) opening of mine