日本鉱業会誌

上北鉱山における露天掘

橋口吉之

1960 年 76 巻 868 号 p. 663-665
発行日: 1960/10/25
公開日: 2011/07/13

DOIhttps://doi.org/10.2473/shigentosozai1953.76.868_663

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Tne limonite doposits in Kamikita mine are consists of two types of ores, one may be regards oxidation of black-ore; the other may be secondary precipitated from ground water pass through the black-ore bodies.
Open pit mining was open in 1956 and about 150, 000 tons of are were produced.
By the reasons of heavy snow falls and cold weather in winter, anual operating times are only 5 months.(from June to Oct.) On 1959 some mechanization, such as power-shovel, bulldozers, and dump-trucks, were introduced into mining. After then mining expense is cutting downward.

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花岡鉱山堤沢鉱床の露天採掘

成田重雄, 橋本七郎

1960 年 76 巻 868 号 p. 666-671
発行日: 1960/10/25
公開日: 2011/07/13

DOIhttps://doi.org/10.2473/shigentosozai1953.76.868_666

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In this paper, the outline of open cut mining and mechanization in the Tsutsumizawa ore-deposits, Hanaoka mine is described.

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釜石鉱山佐比内地区の露天採掘

和田成人

1960 年 76 巻 868 号 p. 672-678
発行日: 1960/10/25
公開日: 2011/07/13

DOIhttps://doi.org/10.2473/shigentosozai1953.76.868_672

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One reserves at outcrop of this deposit were estimated previously at 3 million tons, but chance of its development was not given for its low grade. To work on this development, we adopted a high efficiency method of open pit mining, as its production cost is lower than in underground mining. We began the development work in April 1957, and finished it in August 1959. By our plan, production is 1, 000t per day of 23% Fe ore, covering 10 years, and stripping ratio is 0.7. Main, equipment to maintain this production is comprised of 2 power shovels, 6 dump trucks, 3 bulldozers, 1-motor-grader and 9 heavy drifters. Number of miners is only 39.

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天狗岱鉱山段丘砂鉄層の採掘と選鉱

関亨

1960 年 76 巻 868 号 p. 679-689
発行日: 1960/10/25
公開日: 2011/07/13

DOIhttps://doi.org/10.2473/shigentosozai1953.76.868_679

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To speaking generally, the present condition of iron sand industry in Japan, the beach sand.deposit are almost worked out and the residual mine life are poor. So that it became that they could F not but develop the underground deposit in large scale.
For most of mine lots that belong to Tohoku Satestu Kogyo Co. bear these underground deposit, that we have mined those deposit since a few years, pushed the rationalization by mechanizing the mining and ore dressing, and we have reduced the production cost so much.
This theory discribes about the situation. of mining and ore dressing method in “Tengutai” such as a terrace deposit, and some studies about reformation and object in future.

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スリメダン鉱山における露天採掘

奈良勲

1960 年 76 巻 868 号 p. 690-694
発行日: 1960/10/25
公開日: 2011/07/13

DOIhttps://doi.org/10.2473/shigentosozai1953.76.868_690

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Sri Medan iron Mine is situated in Johore State, Malaya. This mine is discovered by Mr. K. Ishihara in 1919 and out put amounted to about 10 million tons during the years from 1919 to 1941.
On account of the World War II, the mine was closed in 1941. However, its bauxite ore was mined on a small scale by the Japanese Army.
In 1952, the mine was reopened, and since then, its products have been sold to the Japanese Mills.
The deposits are composed of primary and secondary ore made up chiefly of hematite.
Owing to the under mentioned conditions, the opeu pit mining method has to be adopted,
(a) Lack of skillful mining laboures.
(b) The mechanization is easy and high efficiency can be expected.
(c) High extraction of ore can be expected.

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