著者

杉田 創 駒井 武 沖田 伸介 徳永 修三 松永 烈

出版者

一般社団法人 資源・素材学会

雑誌

資源と素材 (ISSN:09161740)

巻号頁・発行日

vol.121, no.9, pp.416-422, 2005 (Released:2007-02-24)

参考文献数

20

被引用文献数

3 3

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For the purpose of examining the adsorption behavior of fluorine on clay minerals, the adsorption equilibrium experiments on fluorine were carried out using several clay minerals. Then various analysis and considerations, as listed in the followings, were done on the basis of the experimental results.1) The adsorbed amount of fluorine per unit mass of clay mineral was ranged as Kaolinite >Saponite >Pyrophyllite, Dickite >Montmorillonite.2) When the mass ratio of clay mineral to liquid was constant, the ratio of adsorption equilibrium concentration of fluorine to initial one became small, as the initial concentration of fluorine was lower.3) It was clear that there was less correlation between the BET specific surface area of the clay minerals and the adsorbed amount of fluorine, because the BET specific surface area was ranged as Saponite > Montmorillonite(Mikawa) > Kaolinite > Montmorillonite(Tsukinuno)> Dickite > Pyrophyllite. 4) The cations such as the alkali metal (Na, K), alkaline earth metal (Ca, Mg), iron, silicon and aluminum, which are contained in the clay minerals, are major chemical components which may be bonded with fluorine. However the quantitative correlation between those each content in the clay minerals and the absorbed amount fluorine could not be recognized. 5) For each clay mineral, the fluorine adsorption data can be arranged clearly in every conditions for the mass ratio of clay mineral to liquid. It was clarified the adsorption isotherm of fluorine on the clay minerals were represented using Freundlich's adsorption equation. 6) The correlation equations which took the mass ratio of clay mineral to liquid into consideration were proposed on the adsorption coefficient and index in Freundlich's adsorption equation. Using both those equations and the values of adsorption parameters obtained in this study, it becomes possible to estimate the adsorbed amount of fluorine on the clay minerals and fluorine concentration in liquid phase.

著者

佐々木 高之助

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.52, no.615, pp.516-520, 1936-07-22 (Released:2011-07-13)

著者

坂市 太郎

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.34, no.403, pp.844-852, 1918-09-22 (Released:2011-07-13)

著者

守田 良太耶

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.52, no.615, pp.450-455, 1936-07-22 (Released:2011-07-13)

著者

野呂田 晋 岩崎 雄一 荻野 激

出版者

一般社団法人 資源・素材学会

雑誌

Journal of MMIJ (ISSN:18816118)

巻号頁・発行日

vol.139, no.4-8, pp.21-28, 2023-08-31 (Released:2023-08-18)

参考文献数

24

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We analyzed the temporal changes in water quality variables (pH and concentrations of Fe and As) of mine drainages and downstream rivers at the Shojin-gawa Mine in Hokkaido, Japan, based on water quality monitoring data from 1992 to 2020. We also examined the correlations between mine drainages and river waters for these three water quality variables. With some exceptions (e.g., increasing trends in pH for mine drainages in the Shojin-gawa pit area), we found no trend of improvement in the three water quality variables over the studied period in most of the mine drainages and river waters. In addition, water quality variables at the most downstream study site, Orito-gawa A (the target site for achieving environmental water quality standards), showed higher correlations (r > 0.5) with those at the most downstream site of the Amemasu River affected by mine drainages from the Amemasu-gawa pit area than those at the most downstream site of the Shojin River affected by mine drainages from the Shojin-gawa pit area. Fe and As concentrations at the most downstream site of the Amemasu River were largely influenced by mine drainages from the Amemasu-gawa pit area (i.e., Taisei and Chugiri pits). These results highlight the importance of monitoring water quality at the most downstream site of the Amemasu River to assess the influence of mine drainages on the changes in water quality at site Orito-gawa A. Additionally, we observed relatively high correlations between electric conductivity (EC) and concentrations of several elements at the most downstream site of the Amemasu River. Therefore, in-situ measurement of EC may be beneficial for performing screening-level assessments or low-cost monitoring of water quality when considering and implementing sustainable water quality monitoring methods over the long term.

著者

上村 敏夫

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.80, no.913, pp.584-590, 1964-07-25 (Released:2011-07-13)

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Due io it's natural conditions the original exploiting features in Akabira Coal Mine were as follows.1. Combination of shaft and belt conveyor.2. Expansion of adjacent area by means of blind inclined shaft system.3. Origination of special car-coupler which can be used for both shaft and inclined shaft.Besides, many preceding technical rationalization and adoption of the new calculating method of stondard amount of labour. Now, we have fully acomplished the rationalization of operation. The present capacity of productioin is 2, 000, 000 tons/year and it's efficiency is 60 tons/head/month.

著者

清水 賀之 畠山 信夫 花村 英悟 渡部 一雄 横山 由香 益山 忠

出版者

一般社団法人 資源・素材学会

雑誌

Journal of MMIJ (ISSN:18816118)

巻号頁・発行日

vol.135, no.7, pp.52-62, 2019-07-31 (Released:2019-07-05)

参考文献数

17

被引用文献数

1

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Flow characteristics of slurry with rare-earth rich mud are investigated to examine lifting systems for mining rare-earth elements from deep seabed. Twelve samples, extracted from different locations and depths from seabed around the Minamitorishima with several concentration of rare-earth elements are mixed up with sea water to make slurry with specified volume concentration of mud 1.0% to 10.0%. Cone-plate type rotary viscometers are used to examine relations between shear stress and shear rate of slurry in each volume concentration of mud. As a result, it was found that shape of graph; the shear stress in the vertical axis and the shear rate in the horizontal axis was concave down and increasing during whole range of the shear rate. The shear stress increased gradually as the shear rate increased in case of low volume concentration of mud up to 3.0%. On the other hand, the shear stress changed significantly at small shear rate, and then gradually increased, then lineally in the end in case of larger volume concentration. In addition, similar characteristics under the same volume concentration, even though tested samples were extracted from different locations, depths and concentration of rare-earth elements. Further, three types of fluid model; the Power low model, the Bingham-Papanastasiou model and the Herchel-Bulkley-Papanastasiou model were fitted on the data using the least square techniques, then compared with each other. The last two models, i.e., the Bingham-Papanastasiou model and the Herchel-Bulkley-Papanastasiou model corrects deviations from the data when using “original” the Bingham model and the Herchel-Bulkley model, especially in the range of small shear rate under high volume concentration of mud. The Herchel-Bulkley-Papanastasiou model was the most appropriate model within the three models. Furthermore, correlation equations for parameters of the HerchelBulkley-Papanastasiou model were derived related to volume concentration of mud.

著者

西松 裕一

出版者

一般社団法人 資源・素材学会

雑誌

Journal of MMIJ (ISSN:18816118)

巻号頁・発行日

vol.133, no.2, pp.34-44, 2017-02-01 (Released:2017-02-28)

参考文献数

5

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This is an essay on the methodology and practical process of the research work in the field of engineering science. In this paper, firstly the philosophy and concept of scientific research is discussed. Secondly, the author describes the present procedure of the publishing of research papers in the journal of some academic or professional societies, as well as the review system which is indispensable for certification of the academic quality of research papers. Thirdly, some processes of study and academic training from the graduate student up to the professional researcher are concretely explained.Furthermore, the author indicates the important role of technical abilities of each researcher, which include mathematical analysis and designing of experimental equipments applied for the research works.Next, the author describes the practical process of research works, which starts from the search and decision of research theme, through the evaluation of its expected contributions as well as possibility of success, the theoretical analysis and/or experimental work on the decided research theme, and the examination of test results or the verification of test run of theoretical analysis, attains to the publishing of results of the research work.Finally, the process and measure of evaluation of the quality of research papers are discussed from academic and industrial points of view, and some features of the excellent research paper are described.

著者

高 秀君 大久保 誠介 福井 勝則 金田 博彰

出版者

一般社団法人 資源・素材学会

雑誌

資源と素材 (ISSN:09161740)

巻号頁・発行日

vol.122, no.1, pp.26-34, 2006 (Released:2007-02-24)

参考文献数

20

被引用文献数

1 1

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For flood prevention, power generation and conveyance, the world's largest Three Gorges Dam was begun to construct in 1993. However, the problem of landslide around the Three Gorges reservoir has not been solved completely so far. Although a lot of geological investigations have been carried out in the field, the role of rock mechanical characteristics in the failure of rock slope has not been cleared thoroughly.In order to study the geological setting and the mechanical characteristic of the landslide area around the Three Gorges reservoir, field investigation and laboratory work including microscope observation, X-ray powder diffraction analysis and uniaxial compressive tests have been carried out. Rock specimens such as two muddy sandstones, a red mudstone, a limestone and a sandstone were collected and examined.The main mineral composition of examined rock specimens except for limestone is quartz. Under the air-dried condition, sandstone is the strongest and weathered muddy sandstone is the weakest. It is interesting to note that calcium contents (carbonate observed) in unweathered muddy sandstone are significantly decreased in weathered one. The decrease in strength for the weathered rock may arise from the dissolution of calcium. For all sample rocks, uniaxial compressive strength shows remarkable decrease under the water-saturated condition. It may be attributed to high content of clay minerals.Complete stress-strain curves were obtained. For all sample rocks, stress increased almost linearly with strain up to the peak strength and then dropped rapidly indicating brittle feature. Weakening under water-saturated condition and high degree of brittleness indicate that very careful and sophisticated measure is necessary to prevent landslide in the area.

著者

小槻 勉

出版者

一般社団法人 資源・素材学会

雑誌

資源と素材 (ISSN:09161740)

巻号頁・発行日

vol.117, no.6, pp.479-483, 2001 (Released:2006-01-08)

参考文献数

23

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History of lithium batteries is briefly described with emphasis on how they have been growing, why some of them have been ruined, and which scientific field has been triggered. Some background for lithium-ion batteries is given and the state-of-art science and technology are highlighted. A series of trials on the research of lithium insertion materials for advanced lithium-ion batteries is also discussed in terms of materials science.

著者

西島 直己

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.58, no.684, pp.274-275, 1942-04-22 (Released:2011-07-13)

著者

今井 正修 四谷 禎三

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.71, no.806, pp.405-410, 1955-08-25 (Released:2011-07-13)

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Heiwa No.2 Coal Mine was opened in 1947, and begun to operate in August 1954, and now it's production is about 600 t per day of high calorie caking coal. The new epuipments were adopted to this mine, especially the incline haulage by skip-cars is mechanically and electrically going into effect for the consequence of following.1. The Tandem Winding mashines of 2 motors system are equipped with no mechanical connection between 2 drums.2. The railway is a single track, and 2 skip-cars are drived alternately on this railway.3. The measuring conveyor system is used for the loading to the skip-car.4. The heavy type skip-tippler is equipped at slope in 20 degree.5. Winding mashine, loading mashine, skip-cars and skip-tippler are drived all together with automatic control.

著者

重光 俊彦

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.82, no.941, pp.751-754, 1966-09-25 (Released:2011-07-13)

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At Chikubetsu Coal Mine, we have begun excavation of prospecting mine road about 1, 700 meters long, using Russian PK-3 heading machine since February, 1966.There are some difficulties in working, e. g. maintenance of PK-3's loop-feeder and transporting debris cars, we could perform heading of mine road in coal seam 20 meters per day.

著者

山田 復之助

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.53, no.625, pp.318-324, 1937-05-22 (Released:2011-07-13)

著者

朝比奈 敬三

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.76, no.865, pp.444-452, 1960-07-25 (Released:2011-07-13)

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Chikubetu coal mine situated in Hokkaido, their area are about 3, 000 hectares, estimated available reserves about 43, 000, 000t, in which about 2, 900, 000t mined out.The largest difficulty we met on the rationalization process was how to deal with the mudstone, which we found under side of coal seam. This mudstone containes a lot of bentonite and very brittle.At the same time, it absorbs water very easily and increases itself.Therefore, it was very difficult to maintain the gallery, which was excarvated in this rock seam. As the first adequate measure for that, we excarvated the transportation gallery in the other harder floor rock, and we adopted the so called“Pocket mining system”.As above mentioned, our suitable measure for the brittle and absorbable mudstone rock seam led us to The mechanization in face and rationalization of the transportation system, and we could get the large output of coal in face.Well, we will describe this rationalization process in more detail as follows ; after we succeeded the“Kappe mining system”, we excarvated the great transportation cross cut as the first step to rationalization of Transportation system.(“Kappe mining system”is a mining system, in which we use the Kappe-iron beam, iron prop and armed conveyer)Then, as the second step, we tried to concentrate the coal face, rationalize the incline belt shaft and armed conveyer gate road. After that, we adopted the so called“slicing mining system”as we see it today.The great effects of rationalization were increase of output per man shift, and decrease of mining cost.The output per man shift became 7 times larger than before, total coal output 10 times, mining cost became 13 times.Without adaptation of any new machine and special mining method, we got these good effects by only effective using of our machines and installations.Now we think, our rationalization process till now was the only first step. And we must try to develop the new mining technic as the second step of our rationalization.We believe that, on the base of our above mentioned rationalization, we can develop the new mining Technic in our coal mine, for instance, adaptation of hydraulic prop, hyaraulic transportation of coal, new Technic of shaft sinking etc.Well, we got also good results of safety in coal mine, and this owed to the improvement of our technic and rationalization, we think.We mentioned above only the rationalization of technic, but we must stress here finally the adequateness of our labour management was the important element to the good reconstraction of our coal mine, which was ever facining a terrible crisis.

著者

藤原 滋郎 佐藤 久三夫

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.1853-1857, 1967-12-25 (Released:2011-07-13)

著者

貞清 新一

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.1665-1666, 1967-12-25 (Released:2011-07-13)

著者

山谷 金治

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.100, no.1160, pp.978-980, 1984-10-25 (Released:2011-07-13)

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Tsukinuno mine is located in the central part of Yamagata prefecture.Annual production of the mine is 100, 000tons of bentonite are which consists of Na-montmorillonite accompanying with a little amount of quartz, feldsper and calcite and mining methods are shrinkage stoping and sublevel stoping.This paper describes on the following points(1) Geology and mineral deposits(2) Opening(3) Mining methods(4) Others 1) transportation, 2) ventilation, 3) drainage, 4) lighting, 5) mine safety

著者

杉山 爲吉

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.61, no.717-718, pp.26-40, 1945-02-20 (Released:2011-07-13)

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浮鑛油の不足對策として, 筆著は杉根株より得られる杉根油に着目し, 之が研究を試みた。杉根油は杉根株を水蒸氣蒸溜により作りしものにして, 之と同油を硫酸處理せし碗酸塵理油との二者につき, その有する起泡力, 浮鑛力を既に優秀なる浮鑛油として使用され來り, ヤーマーFパイン油並に最近浮鑛油として登場せる, シトロネラ油更にシダーウッド油 (西洋杉油) に對し比較檢討したところ, 前二者共にヤーマーFパイン油に對しては, 起泡力は劣るも浮鑛力に於ては, 杉根硫酸處理油は之を凌ぎ杉根原油は多少劣りたるのみにて, 何れも優秀なる成績を示し, シトロネラ油, シダーウッド油に對しては起泡力も浮鑛力も遙に凌駕した。顧ふに杉は本邦到る處に豊富に産するものにして, その需要を充分に満し得るものといへよう。されば杉根油が如何なる成分より成り, その有する起泡力, 浮鑛力が何の成分に基因するものなるや, 等については更に詳細なる研究に〓つとしても, 浮鑛油不足の現勢下、杉根油の優秀なる浮鑛力の確認は, その及ぼすところ大なるものありと考へ, 拙速なる原稿ではあるが, 玄に不取敢發表した次第である。

著者

鶴岡 競

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.1227-1229, 1967-11-25 (Released:2011-07-13)