Journal of the Mining Institute of Japan
Online ISSN : 2185-6729
Print ISSN : 0369-4194
ISSN-L : 0369-4194
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Volume 67, Issue 758
Displaying 1-7 of 7 articles from this issue
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  • All-round Prospectings for Ore Deposits
    Surveys at the Kune Copper Mine
    Hideki IMAI, Kenjiro KIMURA, Yataro SHIMOMURA, Shigeru NISHIO, Takato ...
    1951 Volume 67 Issue 758 Pages 297-302
    Published: August 25, 1951
    Released on J-STAGE: July 13, 2011
    DOIhttps://doi.org/10.11508/shigentosozai1885.67.297
    JOURNAL FREE ACCESS
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    This paper presents the results and analysis of field works of all-round prospectings for magnetite-bearing cupriferous pyrite deposits in Tempaku area at the Kune copper mine, Shizuoka Prefecture.
    The Tempaku deposits occur along sheared zones of meta-diabase intruded into graphite schist.
    Geological work, geochemical prospecting, magnetic survey and electric exploration were conducted simultaneously in the field. The results of a number of these surveys are described and are correlated vs, ith plans of mine exploration and development. For best results, all available geological and geochemical data were considered when interpreting the magnetic and electric anomalies obtained.
    All-round prospectings showed that the Tempaku deposits were considered as a northern extension of the Nago deposits and several promising are zones have been revealed for future exploration. Structural and petrographic evidence suggests that a post-ore fault with northwestern strike is assumed at a northern end of the Tempaku old workings.
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  • Stress Distribution Around a Circular Tunnel due to Geothermal Effect
    Jiro AWAZU
    1951 Volume 67 Issue 758 Pages 303-310
    Published: August 25, 1951
    Released on J-STAGE: July 13, 2011
    DOIhttps://doi.org/10.11508/shigentosozai1885.67.303
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    Of late years, a vast amount of work about earth-pressure due to gravitation as two dimensional problem of elasticity has been done by authorities in the theory and experiments which makes us gradually clear how stress around various tunnels and at faces is distributing.
    However, earth-pressure occurs not only by gravity but also by heat of strata. Notwithstanding its importance, none has get touched upon the latter.
    In this paper, auther has solued the problem of earth-pressure around a circular tunnel caused by heat of strata and found that geothermal effeet has a great deal of influence on earth-pressure in deep mines as same as gravity.
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  • Temperature Change of Mine Air Currents
    Yoshio HIRAMATSU
    1951 Volume 67 Issue 758 Pages 401-405
    Published: August 25, 1951
    Released on J-STAGE: July 13, 2011
    DOIhttps://doi.org/10.11508/shigentosozai1885.67.401
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    The temperature change of mine air currents caused by the variation of height, velocity and humidity or by frictional resistance and heat exchange along the walls was studied and formulas (10)&(15) were presented. In particular the influence of humidity was discussed. For example of application of the, formulas, the temperature change in shafts was also. discussed, with some results of measurement for reference.
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  • Fundamental Researches on Smelting of Sulphide Ores (7 th Report)
    On the Equilibrium in the Reduction of Copper Sulphide in Liquid Copper by Hyrogen
    Kingo SUDO
    1951 Volume 67 Issue 758 Pages 407-412
    Published: August 25, 1951
    Released on J-STAGE: July 13, 2011
    DOIhttps://doi.org/10.11508/shigentosozai1885.67.407
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    With a view of acquiring a basis for the thermodynamic treatment of reactions' involving sulphur in molten copper, the equilibrium in the reduction of copper sulphide in liquid copper by hydrogen gas has been studied with the aid of a flow method.
    The effect of temperature upon the equilibrium constant and the free-energy change in the reaction within the 1115-11245°C has been determined. The experimental results are summarized by the equations.
    Cu2S(in Liq. Cu)+H2=2Cu(1)+H2S;
    _??_
    ΔF°=15552+0.110T
    By combining the equations here determined witn the known data of hydrogen sulphide, the following equations have been obtained with regard to the dissociation pressure of Copper sulphide dissolved in liquid copper.
    2Cu2S(in liq. Cu)=4Cu(1)+S2/
    _??_
    ΔF°=74035-23.11T
    On the basis of the results here obtained, the data described in the 6 th report and the constitutionary diagram Cu-Cu2S, theoretical considerations as to the equilibium relations between copper, sulphur and hydrogen at high temperature have been carried out and the composite diagrams of Cu-S-H and Cu-S have deen determined
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  • [title in Japanese]
    [in Japanese], [in Japanese]
    1951 Volume 67 Issue 758 Pages 413-418
    Published: August 25, 1951
    Released on J-STAGE: July 13, 2011
    DOIhttps://doi.org/10.11508/shigentosozai1885.67.413
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  • [title in Japanese]
    [in Japanese]
    1951 Volume 67 Issue 758 Pages 419-424
    Published: August 25, 1951
    Released on J-STAGE: July 13, 2011
    DOIhttps://doi.org/10.11508/shigentosozai1885.67.419
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  • [title in Japanese]
    1951 Volume 67 Issue 758 Pages 425-432
    Published: August 25, 1951
    Released on J-STAGE: July 13, 2011
    DOIhttps://doi.org/10.11508/shigentosozai1885.67.425
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