著者

山口 梅太郎 下谷 高灑 下村 彌太郎 安藤 行郎

出版者

一般社団法人 資源・素材学会

雑誌

日本鉱業会誌 (ISSN:03694194)

巻号頁・発行日

vol.97, no.1125, pp.1157-1162, 1981-11-25 (Released:2011-07-13)

参考文献数

4

被引用文献数

3 2

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This is the report of the landslide happened on 20th of September, 1973 at the Kagemori limestone quarry, Saitama prefecture. The slide started at about July of 1972 and it took over one year to final slide from the first finding of the crack on the slope. This report includes the record of the displacement of crack opening observed at thecrack on the failure slope and the analitical discussion on the slide.

著者

金子 勝比古 村田 健司 柴 拓海 大見 美智人

出版者

一般社団法人 資源・素材学会

雑誌

日本鉱業会誌 (ISSN:03694194)

巻号頁・発行日

vol.103, no.1187, pp.9-15, 1987-01-25 (Released:2011-07-13)

参考文献数

12

被引用文献数

2

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To discuss the validity of theoretical expressions, shown in eq.(1), for rock deformability obtained in the 1st report, a series of experimental studies on the elastic moduli of rock is performed.To evaluate the theoretical expressions requires the knowledge of the crack density Φ, the intrinsic elastic moduli E and ν, the frictional coefficient μ on the crack surface, and the state coefficient q. q proposed in the 1st report is the ratio of the crack density of open cracks to that of total cracks.Four kinds of granite specimens with different crack concentration were employed in experiments. Modal analysis, hydrostatic compression test, and observation of cracks on the polished surface of specimens were carried out. By analyzing these results, the crack density and the intrinsic elastic moduli of the specimen were evaluated and the theoretical values of effective elastic moduli were calculated in two cases, that q=1.0 and q=0.0, by using eq.(1). q=1.0 corresponds to the case that all pre-existing cracks are open and q=0.0 corresponds to the case of closed cracks. The former condition gives the minimum values of the elastic moduli and the latter one gives the maximum values.The tangential elastic moduli of the specimen were measured as a function of the applied stress by uniaxial compression test. The maximum. and minimum values of elastic moduli obtained experimentaly were comnared with the thenretiral vallieq Reasonable agreement was obtained (shown in Table 3 and Table 4).It is concluded that the theory proposed has a promise to estimate rock deformability quantitatively.

著者

阿部 顕

出版者

一般社団法人 資源・素材学会

雑誌

日本鑛業會誌 (ISSN:03694194)

巻号頁・発行日

vol.83, no.956, pp.1660-1664, 1967

著者

阿部 顕

出版者

一般社団法人 資源・素材学会

雑誌

日本鉱業会誌 (ISSN:03694194)

巻号頁・発行日

vol.83, no.956, pp.1660-1664, 1967-12-25 (Released:2011-07-13)

著者

家守 伸正 青野 貞二 黒川 晴正 伴野 睦雄

出版者

一般社団法人 資源・素材学会

雑誌

日本鉱業会誌 (ISSN:03694194)

巻号頁・発行日

vol.103, no.1191, pp.315-323, 1987-05-25 (Released:2011-07-13)

参考文献数

15

被引用文献数

3 1

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Two adjustable parameters, namely the oxygen efficiency and the “imperfect combustion ratio” of the furnace charge, were introduced into an equilibrium calculation program developed by Goto. In order to calculate the weights of matte and slag more accurately, all the other elements which are not incorporated in Goto's program were treated as one component. The overall pyrometallurgical reaction in a copper flash smelting furnace was analyzed by the modified program.The results obtained are summarized as follows:(1) The important elemental compositions calculated for matte, slag and gas phases were in good agreement with the values of chemical analyses by setting the oxygen efficiency so that the experimental and calculated matte grades are equal.(2) In the case of the magnetite content of the slag, however, the analyzed values were much larger than the calculated ones. The re-evaluation of the activity coefficient of magnetite in slag brought a relatively good agreement although the analyzed values were still larger by about 3% than the calulated ones.(3) The measured oxygen pressures were 2 times as high as the calculated ones, and this result shows the same trend as the magnetite content of the slag. These results may imply that the magnetite and hematite which are contained in the furnace charge and/or formed in the upper zone of the reaction shaft are absorbed by the slag to a greater extent than the equilibrium content.(4) If the performance of the concentrate-burner is not adequate, the calculated temperature will be higher than the measured one. This temperature difference was explained to some extent by evaluating the “imperfect combustion ratio” of the furnace charge.

著者

志津利 泱

出版者

一般社団法人 資源・素材学会

雑誌

日本鑛業會誌 (ISSN:03694194)

巻号頁・発行日

vol.96, no.1112, pp.731-734, 1980

著者

音藤 実雄

出版者

一般社団法人 資源・素材学会

雑誌

日本鉱業会誌 (ISSN:03694194)

巻号頁・発行日

vol.77, no.878, pp.546-560, 1961-08-25 (Released:2011-07-13)

参考文献数

17

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Our Sorachi Mine situated in the northern part of the Ishikari Coal-Field in Hokkaido was opened for mining in 1890. Since then, we applied many systems of mine opening...such as drift from outcrop, the gallery entry, the shallow shaft, the steep shaft, and the incline method, Up to 1957, both three inclines let out only 800-900 tons per day, and then the coal reserves available, had only three years in a life of exploitation.The output production plan was decided in the maximan of 1600tons per day withoutincreasing the capacity of the washing plant and the National Railway. Due to the housing and water ways problems, it was impossible to increase the number of workers.In order to double the output total, it was either to increase the output per man shift at the face. cut (1), or decrease the number of indirect workers and transfer them to the face cut (2). In these two ways, the latter was decided by the reason that geological conditions were too complex and difficult to adapt the first way.Then a plan with a capital investment of 1600 millions yens was carried out. A speedy opening by a new field was struggled by means of:(1) Reconstruction of mine structure (Horizontal mining system)(2) Adoption of permanent spports(3) Synchronized rationalization of transportation (by automation and remote control)(4) As well as modernization and intensification of pitmouth equipment installations In three years time, from May 15, 1957 to. May 13, 1960 and with 390, 000 workers, the construction works were completed according to a plans.As a result, the output per day was increased from 839 tons average in 1959 to 1154 tons in January 1961, just 8 months after the completion. And the output per man-month was increased from 18.4 tons to 28.6 tons.And the man-powers per 100 tons of output in the face working was reduced to 38. 0 M. S, . in the indirect working 23.9 M.S.and in the under ground working 61.9 M. S. after all. While, the man-powers in the surface working was reduced to 17.4 M. S. These productivities of labour are already near the levels in the Wester Europe.

出版者

一般社団法人 資源・素材学会

雑誌

日本鉱業会誌 (ISSN:03694194)

巻号頁・発行日

vol.74, no.843, pp.plate1-plate16, 1958-09-25 (Released:2011-07-13)

著者

神野 孝行 中尾 強 西田 米治

出版者

一般社団法人 資源・素材学会

雑誌

日本鉱業会誌 (ISSN:03694194)

巻号頁・発行日

vol.86, no.985, pp.245-249, 1970-05-01 (Released:2011-07-13)

参考文献数

18

出版者

一般社団法人 資源・素材学会

雑誌

日本鉱業会誌 (ISSN:03694194)

巻号頁・発行日

vol.83, no.956, pp.1902, 1967-12-25 (Released:2011-07-13)

著者

ぐろすうゑのる きるばーと、ゑつち

出版者

一般社団法人 資源・素材学会

雑誌

日本鑛業會誌 (ISSN:03694194)

巻号頁・発行日

vol.21, no.244, pp.500-516, 1905

著者

井澤 一郎 氏家 英明

出版者

一般社団法人 資源・素材学会

雑誌

日本鉱業会誌 (ISSN:03694194)

巻号頁・発行日

vol.100, no.1160, pp.944-948, 1984-10-25 (Released:2011-07-13)

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Nakatatsu Mine, which is located nearly in the central part of Honshu Island of Japan, is a lead and zinc mine, where pyrometasomatic lead and zinc deposits in skarn masses have been mined.The annual output of crude are in this mine is 410, 000 tons with the average grade of 25 grams per ton silver, 0.38 percent lead and 5.38 percent zinc respectively.The lead and zinc concentrates prepared here are processed at the smelting and refining plants of Mitsui Mining & Smelting Co. Ltd. In 1973, a trackless mining system was introduced into Nakatatsu Mine and to secure more increase in are production, various improvements for the mining facilities such as streamlining its transportation network and various large-sized rock drilling machines were also carried out.Basing on such improved technologies, a mechanized cut and fill method was employed and as a result, the total efficiency per man-month has risen to 227 tons in 1982 from 189 tons in 1973.

著者

兵庫 信一郎 外尾 善次郎

出版者

一般社団法人 資源・素材学会

雑誌

日本鉱業会誌 (ISSN:03694194)

巻号頁・発行日

vol.86, no.993, pp.895-899, 1970-12-25 (Released:2011-07-13)

参考文献数

6

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The slicing mining method in coal mine is one of the most concentrated and rationalized coal mining method, and it has not only many advantages but also disadvantages.As well known, it is very difficult to use the self-advancing support in this method. We introduced several selfadvancing supports which are now used in USSR and discussed its application in our coal mines. If we can use the mechanical supports in slicing method, the mining productivity will be increased much more.

著者

米谷 博行 飯島 庸三 嶋田 高能 成沢 正

出版者

一般社団法人 資源・素材学会

雑誌

日本鉱業会誌 (ISSN:03694194)

巻号頁・発行日

vol.83, no.946, pp.294-298, 1967-02-25 (Released:2011-07-13)

著者

遠藤 龍次

出版者

一般社団法人 資源・素材学会

雑誌

日本鑛業會誌 (ISSN:03694194)

巻号頁・発行日

vol.27, no.313, pp.211-219_1, 1911-03-31 (Released:2011-07-13)

著者

房村 信雄 今井 直哉

出版者

一般社団法人 資源・素材学会

雑誌

日本鑛業會誌 (ISSN:03694194)

巻号頁・発行日

vol.67, no.758, pp.413-418, 1951-08-25 (Released:2011-07-13)

著者

三沢 清扶 高橋 昭教

出版者

一般社団法人 資源・素材学会

雑誌

日本鉱業会誌 (ISSN:03694194)

巻号頁・発行日

vol.83, no.955, pp.1343-1345, 1967-11-25 (Released:2011-07-13)

著者

矢嶋 澄策

出版者

一般社団法人 資源・素材学会

雑誌

日本鑛業會誌 (ISSN:03694194)

巻号頁・発行日

vol.68, no.770, pp.341-346, 1952-08-25 (Released:2011-07-13)

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In this paper, the writer first makes a historical research of mercury mining in Japan.Japan had stbstantial mercury production as early as 7th century, but since then the production showed downward trend and become none in and after 16th century, chiefly due to the lack of geological knowledge and mining engineering. Sine the beginning of this century, a number of new mercury mines were discovered, which brought forth a few tons of mercury only. But the discovery of the Itomuka mine in 1936 changed the whole feature. During the Pacific War, the mercury production in Japan showed peak production of 245 metric tons in 1944, 80 percent of which from the Itomuka mine. But the end of war cut the production sharply again, the Itomuka mine operating only.However, according to the writer's study, it is possible to vaise the production again.The writer states his geological and mineralogical study on the structures and origins of Japan-ese mercury mines, suggests advisable principles for prospection and illustrates profitable methods of mining, dressing and smelting for smaller mines from his 15 years study and experience at Itomuka mine. Then the writer con ludes that Japanese mercury mines, maney but comparably small and low-graded, will be able to meet domestic requirement not in the long future, if they are operated after study of special treatment.

著者

鈴木 廉生

出版者

一般社団法人 資源・素材学会

雑誌

日本鉱業会誌 (ISSN:03694194)

巻号頁・発行日

vol.96, no.1112, pp.709-711, 1980-10-25 (Released:2011-07-13)

著者

古賀 義彰

出版者

一般社団法人 資源・素材学会

雑誌

日本鉱業会誌 (ISSN:03694194)

巻号頁・発行日

vol.85, no.976, pp.581-583, 1969-08-25 (Released:2011-07-13)