1.
coal mine, coal pit
An underground excavation for extracting coal.
炭鉱が閉山された。
The coal mine was closed.
炭鉱 refers to coal mines and the coal mining industry.
COMMON EXPRESSIONS:
HISTORICAL NOTE:
Japan had many coal mines, especially in Kyushu and Hokkaido, but most closed by the 1960s-70s as oil became the primary energy source.
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