日本鉱業会誌

爆破に伴う土地の振動について

伊藤一郎, 村田勉, 清水達英

1953 年 69 巻 782 号 p. 285-289
発行日: 1953/08/25
公開日: 2011/07/13

DOIhttps://doi.org/10.2473/shigentosozai1953.69.782_285

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In this paper the authors reported the results of an experimental research on the ground vibrations caused by blasting operation.
The results obtained can be summarized as follows: The relationship between seismic ground amplitude and quantity of explosive fired can be shown by the simple power relationship as previously shown by some other investigators.
The ground amplitude does not seem to decrease linearly with the distance travelled, but at the stations nearer to shot point the relationship between the ground amplitude and the distance travelled seems to take more complicated form.
Within the scope of this experiment the amplitude seems to increase with the static and dynamic powers of explosives used.

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微小なる粒子の浮游度 (II)

粒子の大きさと浮游度

向井滋

1953 年 69 巻 782 号 p. 291-295
発行日: 1953/08/25
公開日: 2011/07/13

DOIhttps://doi.org/10.2473/shigentosozai1953.69.782_291

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To make the relation between the fineness of particles and their floatability clear, the experiments have been made by means of the flotation testings and the sizing analyses of the products, carried out with the determination of the particle sizes by micro-photographs.
As₂S₃, Sb₂S₃, galena from Kamioka. mine, zincblende from Kamioka mine, pyrite fromVVakamatsushimand coal from Shime mine have been used in the experiments as test samples.
From the results of experiments, the relations between the fineness of particles and their floatability are clearly recognized as follows:
The floatabilities of particles are nearly the maximum in the fineness of +15μ decreased a little in the fineness of 15 or 10μ decreased distinctly in the fineness of 5-4μ and become extremely low in the fineness of 0.5μ.

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硫化ニッケル-硫化銅-硫化鉄3元系平衡状態図に関する研究 (第1報)

各2元系平衡状態図について

久島亥三雄, 浅野楢一郎

1953 年 69 巻 782 号 p. 297-300
発行日: 1953/08/25
公開日: 2011/07/13

DOIhttps://doi.org/10.2473/shigentosozai1953.69.782_297

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The mattes is nickel metallurgy are composed of nickel, copper, and iron sulfides. We studied the equilibrium diagram of three binary systems, nickel sulfide-copper sulfide; nikel sulfideiron sulfide, copper sulfide-iron sulfide, by means of differential thermal analysis and microscopic examinations.

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昭和28年上期 (1月～6月) の石炭鉱山におけるガス爆発について

通商産業省鉱山保安局

1953 年 69 巻 782 号 p. 301-303
発行日: 1953/08/25
公開日: 2011/07/13

DOIhttps://doi.org/10.2473/shigentosozai1953.69.782_301

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土呂久鉱山のゲルマニウムについて

池田錦七

1953 年 69 巻 782 号 p. 303-305
発行日: 1953/08/25
公開日: 2011/07/13

DOIhttps://doi.org/10.2473/shigentosozai1953.69.782_303

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摘録

1953 年 69 巻 782 号 p. 307-317
発行日: 1953/08/25
公開日: 2011/07/13

DOIhttps://doi.org/10.2473/shigentosozai1953.69.782_307

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