Ikeshima Coal Mine - Ikeshimatanko

Japanese: 池島炭鉱 - いけしまたんこう

A coal mine operated by Matsushima Coal Mine, located on Ikeshima Island in Nagasaki City, Nagasaki Prefecture. Offshore drilling began in 1948 and confirmed the presence of coal seams. Development began in October 1951, coal was deposited in September 1955, and coal was produced in 1959. In 1974, operations began in the Hikishima area, 3km west of Ikeshima. This area became the main area. The coal seams that are being worked on are the Bantaka layer, the upper and lower layers of 18 layers, and the 4-shaku layer. The coal reserves amount to 2.3 billion tons, and all of the coal is weakly caking coal (→ caking coal), with a calorific value of 7500 cal/kg. The entire mining area is under the seabed, 650m below sea level. As it is an isolated island, it has its own power generation facility and a seawater desalination facility that uses the waste heat from the power generation facility. It closed in November 2001.

Source: Encyclopaedia Britannica Concise Encyclopedia About Encyclopaedia Britannica Concise Encyclopedia Information

Japanese:

長崎県長崎市に属する池島にある松島炭鉱経営の炭鉱。 1948年から海上ボーリングを開始して炭層を確認し，1951年 10月開発開始，1955年9月着炭，1959年から出炭。 1974年から池島西方 3kmの蟇島 (ひきしま) 区域で操業を開始。この区域が主力となる。炭層は盤高層，18層の上層と下層，4尺層が稼行対象で，埋蔵炭量 23億t，炭質はいずれも弱粘結炭 (→粘結炭 ) ，発熱量 7500cal/kg。採掘区域はすべて海底下で，海面からの深さ 650m。離島であるため自家発電設備，その廃熱を利用した海水淡水化設備を有した。 2001年 11月閉山。

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