Bait fishing mine

Japanese: 餌釣鉱山 - えつりこうざん
Bait fishing mine

...In addition, there are also limitations due to the hill-climbing ability of shuttle cars, which are another transportation method, and the capacity of the hoists used to transport coal cars. The Etsuri Mine in Akita Prefecture is a mine of black ore deposits (a complex sulfide deposit of copper, lead, zinc, and iron, including gold and silver) that began production in 1980 and closed in 1991 after producing 1.2 million tons of ore. The deposit, which is 200 meters underground, was developed using a 1,800-meter-long, 10-degree inclined shaft. This shaft was dug using a combination of diesel-engine-driven jumbos, loaders, and trucks, but even after excavation, the shaft was not equipped with rails or conveyor belts for transporting ore cars, and the ore was transported by truck. ...

*Some of the terminology that refers to "bait fishing mines" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…また,別の運搬方式であるシャトルカーの登坂能力や炭車運搬の巻上機の能力によって制限を受けることもある。 秋田県の餌釣(えつり)鉱山は1980年に生産を開始し,91年に120万tの鉱石を産出して閉山した黒鉱鉱床(金・銀を含む銅・鉛・亜鉛・鉄の複雑硫化物鉱床)の鉱山であるが,地下200mにある鉱床を長さ1800m,傾斜10度の斜坑で開発した。この斜坑は,ディーゼルエンジンで駆動するジャンボー,積込機,トラックの組合せで掘り進められたが,掘削後も,この斜坑には鉱車運搬用のレールもベルトコンベヤも設備されず,鉱石はトラックで搬出された。…

※「餌釣鉱山」について言及している用語解説の一部を掲載しています。

出典|株式会社平凡社世界大百科事典 第2版について | 情報

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