日本鑛業會誌
Online ISSN : 2185-6729
Print ISSN : 0369-4194
ISSN-L : 0369-4194
68 巻, 767 号
選択された号の論文の6件中1~6を表示しています
  • 鈴木 光
    1952 年 68 巻 767 号 p. 197-200
    発行日: 1952/05/25
    公開日: 2011/07/13
    ジャーナル フリー
    Author manufactured trially a portable recording wire-rope tester, It's wiring diagram is shown in the fig. 1, in which G is recording galvanometer having 0.2 sec, period and 10-8A current sensitivity. Using this tester, we tested the Tagawa shaft winding rope, the Yotsuyama Koepe winding rope and the Hashima shaft winding rope, Shaft winding arrangements are shown in the fig. 3, and the tested rope data are shown in the table I and the fig. 4. Recording data of the detected ropes are shown in the fig. 5.
  • 圧着力によるピストンの運動の比較
    前野 良久
    1952 年 68 巻 767 号 p. 201-205
    発行日: 1952/05/25
    公開日: 2011/07/13
    ジャーナル フリー
    This paper deals with the results of the investigator's own experiment made on the piston stroke of CA-7 type coal pick which is variated by the initial pressure of the spring of the testing machine, that is to say, initial force.
    The investigator has made a study of the variation between the two initial forces, one is just zero and the other 34 killogramme. A comparison is made between these two, one is by the compressed air pressure, the other by the number of strokes, length of clearance, forward velocity, backward velocity, and shock velocity.
  • 平松 良雄, 中村 一郎, 矢野 壽文
    1952 年 68 巻 767 号 p. 207-213
    発行日: 1952/05/25
    公開日: 2011/07/13
    ジャーナル フリー
    The effect of the natural ventilation of mines was studied thermo-dynamically and a term, natural ventilation head (NVH), was proposed, which is given by-∅ vdp along a cycle of air current composed of underground air current and atmosphere. The natural ventilation pressure (NVP) is able to be defined in several ways, i.e.by-∅ydz, or by NVH multiplied by air density. The former was denoted NVPγz the latter NVPm or NVPex, according to the air density. Another kind of NVP, NVPapp was proposed, that is obtainable by a graphical determenation. The relation among these was discussed. The method of direct experimental determination of NVP was also studied. The theory above mentioned was proved by experiments carried out at Hashima Coal Mine.
  • 熔融鉛中の硫黄の水素による還元について
    須藤 欽吾
    1952 年 68 巻 767 号 p. 215-218
    発行日: 1952/05/25
    公開日: 2011/07/13
    ジャーナル フリー
    With a view of detecmining the thermodynamical properties of sulphur dissolved in molten lead, the reduction equilibrium of sulphur in liquid lead by hydrogen gas was studied at temperatures between 824°and 968°C.
    It was found that the molten lead containing sulphur is regarded as an ideal solution in the range of conditions investigated. Experimentally derived equations relating to the reduction equilibrium are as follows:
    S(in liq. Pb)+H2=H2S;K=PH2S/PH2·(%S) =Kp/(%S),
    log K=-1, 398/T-0.504, ΔF°=6, 353+2.305T.
    Combining the equations with the published ones with respect to the equilibrium constant of the formation reaction of hydrogen sulphide, the approximate equations expressed as a function of temperature for the dissociation pressure of sulphur dissolving in molten lead in the temperature range above described may be represented by the following equations:
    2 S(in liq. Pb)=S2; K´=PS2/(%S) 2,
    log K´=-12, 164/T+4.092,
    ΔF°=55, 640-18.717T.
    Furthermore combining the values observed with the equilibrium constants of dissociation of hydrogen sulphide calculated from the exact formula as a function of temperature the values of log K´ at experimental temperatures were computed and compared with those from the above equations and then it was found that both values at each temperature agree with each other.
  • アンチモニー, モリブデン鉱
    瀬戸 英太郎
    1952 年 68 巻 767 号 p. 219-221
    発行日: 1952/05/25
    公開日: 2011/07/13
    ジャーナル フリー
  • 1952 年 68 巻 767 号 p. 223-230
    発行日: 1952/05/25
    公開日: 2011/07/13
    ジャーナル フリー
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