入にゅう坑こう

noun, noun or participle which takes 'suru', intransitive verb

entering a mine; going into a pit

Technical term used in mining contexts; refers to entering a drift, shaft, or pit. Often used as a noun or with する.

• 作さ業ぎょう員いんが入にゅう坑こうする前まえに安あん全ぜん確かく認にんを行おこなった。

  Safety checks were carried out before the workers entered the mine.

• 入にゅう坑こう時じ間