著者

今泉 常正 彦坂 忠義

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.946, pp.349-353, 1967

著者

岡本 晴道 緒方 俊 川澄 良雄 山本 則雄 大田 一義 寺崎 秀敏

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.105, no.2, pp.150-153, 1989-02-25 (Released:2011-01-27)

参考文献数

6

著者

戸田 薫一

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.462-475, 1936

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This paper is a brief description of the present state of 3 collieries (Taihei, Taiei, and Siritori), which belong to Karafuto Mining Co., Ltd.

著者

小川 利男

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.261-263, 1967-02-25 (Released:2011-07-13)

参考文献数

1

著者

中村 謙吾 佐藤 海里 川辺 能成 桑谷 立 駒井 武

出版者

一般社団法人 資源・素材学会

雑誌

日本鑛業會誌 (ISSN:18816118)

巻号頁・発行日

vol.132, no.1, pp.22-30, 2016

被引用文献数

2

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It is important to understand the distribution mechanism of heavy metal elements in environmental systems, because the toxicities of various metals and metalloids significantly affect health risks. The heavy metals concentrations are controlled by a wide of variety environmental factors. This study aims to clarify main influence factors on the heavy metal distribution in sediment, soil, river in the Natori River, Sendai City. We firstly produced geochemical maps for heavy metal concentrations (As, Pb and Cr) of river sediment, neighboring soil (bulk component, soluble component in 1N HCl and in pure water) and river water. The heavy metals concentrations in river water increase from upper stream to down stream, whereas heavy metal concentrations in river sediments and soil vary little from upper stream to downstream. There are no anomalous distributions of heavy metals in the studied area, although many anthropogenic materials are found in sediment, soil and river water. The correspondence analysis was applied to investigate relationships of heavy-metal concentrations between sediment, soil and river water. The results indicate that the heavy metals (As, Pb Cr and Zn) in sediment, soil and river water are dominantly controlled by natural sedimentary processes, such as denudation and sedimentation. The proposed method could be further applied for other pollutants in various environment systems. From a viewpoint of risk assessment of heavy metals, it is suggested by the presence of closer relationship of heavy metals that contains the risk information of heavy metals.

著者

金子 正男

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.69, no.783, pp.321-340, 1953-09-25 (Released:2011-07-13)

参考文献数

12

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At the Kamioka Mine, the stoping method of main stopes, formerly shrinkage or cut and fill, has been gradually replaced by sub-level stoping method, using long blast holes (radial horizontal holes since 1946, or vertical downward holes). Long blast holes are about 10-15 m in depth and 46 mm' in diameter, blasted by milli-second delay electric detonators.This report describes mining and drilling method and its cost in following chapters:-(1) General geology(2) Process of the study(3) Method of drilling of long hole(4) Method of sub-level stoping(5) Conclusion

著者

下村 弥太郎 山口 梅太郎

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.81, no.921, pp.68-74, 1965-02-25 (Released:2011-07-13)

参考文献数

7

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Prilled ammonium nitrate manufactured in this country has been applicable for AN-FO blasting. This paper is the second report of fundamental studies on AN-FO blasting using the recently improved prilled AN. The studies were consisted of experimental AN-FO blasting tests in a mine formeasurements of the cap-sensitivity and the detonation valocity and laboratory tests of loading AN-FOto bore-holes by an ejector type AN-FO bore-hole charger.AN-FO tested was more cap-sensitive in comparison with the AN-FO reported in the first report. Two bound No.6 blasting caps had a possibility to ignite 94 a 6 AN-FO charge in a sealed steel stube. Detonation velocities of AN-FO measured by Dautorich method were from 2, 0000 to 3, 000m/s.By compressed air jet loading, AN prills were crushed and filled in a bore-hole at high density, 0.85-1.0, to the density of original AN-FO, 0.81.The diameter and the length of loading hose, namely hose resistance, is very much effective on the loading speed of the compressed air loading system of AN-FO. The diameter of borehole is a major affecting factor for the state of AN-FO loaded in a bore-hole such as the density. While, the loading air pressure and the distance between the top of loading hose and the face of charge in a bore-hole are minor factors for the state.Loading techniques of AN-FO by compressed air system is rather experimental and should be established by practical operation in each mine.

著者

佐々木 秀顕 岡部 徹

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.136, no.7, pp.77-87, 2020-07-31 (Released:2020-07-31)

参考文献数

174

被引用文献数

3

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Over the past years, the significance of recycling Cu and its accompanying metals has been increasing. However, the frequency of anode passivation increases during the electrorefining of copper when the copper anode contains a high concentration of impurities. When the amount of secondary materials (scraps) used is increased, the process of electrorefining is frequently troubled because e-waste contains elements that induce anode passivation. Therefore, the development of passivation-prevention technology for low-grade copper anode is essential. This article reviews previous research on the behavior of impurities in the Cu anode and their effects on passivation. The guiding principles for developing passivation-prevention technology are also outlined.

著者

岸本 義明

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.85, no.974, pp.401-409, 1969-06-25 (Released:2011-07-13)

参考文献数

3

被引用文献数

1 1

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After a year's investigation at Taiheiyo Kushiro colliery of a high-output, high-productivity, low-cost mining system, we started operating a so-called SD face in April of 1967. This system uses shield supports and a drum cutter to obtain a high production from a short face with rapid advance.We encountered many difficulties mainly because of unfavorable roof conditions. However, we have now overcomed them and have achieved a cost reduction of 1, 500 Japanese yen per ton of coal in the panel.SD face No.14 is being operated at present under extremely stable conditions, giving the following results: face length, 50 meters; output, 1, 800 to 2, 000 tons per day; rate of face advance, 10 to 15 meters per day; OMS, 50 to 60 tons.

著者

山下 博之

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.88, no.1012, pp.367-368, 1972-06-25 (Released:2011-07-13)

著者

有馬 孝彦 佐々木 亮介 Carlito Baltazar TABELIN 田本 修一 山本 隆広 Tangviroon PAWIT 五十嵐 敏文

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.136, no.6, pp.64-76, 2020-06-30 (Released:2020-06-30)

参考文献数

21

被引用文献数

1

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Rocks generated from tunnel construction projects for roads and railways throughout Japan have often leached out hazardous trace elements, such as arsenic (As) and selenium (Se). In nature, the oxyanionic species of As and Se have a variety of chemical species, so speciation is one of the crucial factors in their migration through natural geologic media. In this study, column experiments consisting of four types of crushed rock samples containing As and Se, and a river sediment (RS) as an adsorbent obtained near the tunnel construction site were conducted to evaluate the leaching and adsorption behavior of arsenite (As (III) ), arsenate (As (V) ), selenite (Se (IV) ), and selenate (Se (VI) ). The results showed that the dominant speciation of As and Se in the effluent from the rock layer was As (V) and Se (VI), and that the addition of a bottom RS adsorption layer or the mixing of RS with the rock layer decreased the leaching concentrations of As (III), As (V), Se (IV), and Se (VI). Cumulative leachability (CL) for each speciation through the column experiments was calculated to evaluate the amounts of As and Se retained in RS. The calculated CL showed that the bottom RS layer or mixing of RS with the rock reduced the CL of As (III), As (V), Se (IV), and Se (IV) ranging from 60 to 89%, 73 to 89%, 9 to 75%, and 36 to 60%, respectively; however, mixing of RS with the rock layer was ineffective in decreasing CL of Se (VI). The reduction of CL may be due to adsorption and/or coprecipitation by iron and/or aluminum oxides contained in RS. These results indicated that utilization of RS for the bottom adsorption layer was effective in reducing As and Se concentrations irrespective of their speciation, although that of mixed with rock layer was effective only in reducing As concentrations irrespective of their speciation.

著者

岡本 泰彦 川畑 雅樹 正代 知幸 辻本 康平

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.136, no.6, pp.52-63, 2020-06-30 (Released:2020-06-30)

参考文献数

7

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Ube Industries' Isa Cement Factory introduced a rock cutting machine“2500SM”capable of continuous excavation by rotating a drum equipped with a cemented carbide bit from the viewpoint of effective recovery limestoneresources. Because it can excavate with low vibration and low noise, it can reduce the distance from the surrounding private houses that have been secured in consideration of the effect of blasting, and in order not to loosen the excavated surface, the bench angle of the excavated surface is steeply inclined and berm is minimized. It was because it was judged that the minable amount could be expanded by minimizing the berm. In the early stages of the introduction, cutting bits were broken unexpectedly, and the frequency of replacement increased, resulting in a decrease in mining efficiency. In addition, the excavation slope using a rock cutting machine“2500SM” has a smoother surface and no large cracks. In addition, in the evaluation using methods of elastic wave exploration, ground penetrating radar and infrared camera, the slope of excavation is compared with that by blasting. It was confirmed that the soundness was high. The effects of cutting bit improvements was evaluated, the expected excavation area, the soundness and safety of the rock slope, and the expansion of the minable amount that were expected when the rock cutting machine “2500SM” was introduced. In this paper,we repot the evaluation results.

著者

鈴木 忠 井清 武弘

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.106, no.3, pp.139-143, 1990-03-25 (Released:2011-01-27)

参考文献数

5

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For the purpose of more effective underground communication, UHF radio wave propagation along underground gallery was discussed both experimentally and theoretically. From the experimental results, it became clear that the higher frequency bands, i. e. more than 500 MHz, were favorable for underground use by the reason of the lower propagation loss. To establish the propagation model of UHF radio wave theoretically, both the simple geometrical image source method and the characteristic equation method were discussed to allow for gallery conditions such as timbering methods, cross sectional area and others. Reasonably good agreements were observed between experimental results and theoretical calculation which is based on the simple geometrical image source method.

著者

原田 種臣 泉川 千秋

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.88, no.1014, pp.455-463, 1972-08-25 (Released:2011-07-13)

参考文献数

76

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In order to establish a basic information for various trials concerned with utilization of pyrite, the elemental properties of this mineral are reviewed.In an initial chapter, general characteristics of pyrites are outlined. Subsequently, the results of studies having been carried out hitherto, by many investigators, are summarized with respect to the following subjects in relation to the imperfection of the crystals.1) Chemical composition, 2) Minor elements, 3) Crystallographic property (Lattice constant), 4) Electrical property, 5) Optical property, and6) Oxidation property.

著者

畠山 信夫 清水 賀之 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.136, no.5, pp.40-51, 2020-05-31 (Released:2020-05-29)

参考文献数

11

被引用文献数

1

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The mud flow between the borehole and the drill pipe in well drilling can be regarded as the flow of nonNewtonian fluids through a concentric annulus. In recent years, the Herschel-Bulkley rheological model is recommended as a general fluid model of drilling mud because it encompasses the power law model and the Bingham plastic model. Also, in the field of well drilling, the flow through a concentric annulus is conventionally approximated by the flow between two parallel plates. However, its applicability does not seem to be examined because it is not easy to perform analysis of non-Newtonian fluid flow through a concentric annulus. For studies on laminar flow of viscoplastic fluids (fluids with yield stress) through concentric annuli, there are researches on Bingham fluid by Fredrickson & Bird and on Herschel-Bulkley fluid by Hanks. Since the equation of motion in viscoplastic fluid flow through a concentric annulus cannot be analytically solved in all of them, in their researches numerical calculations are presented by charts. However, it is not simple as a method to estimate the frictional pressure loss, because multiple charts are related. In this research, based on the results of previous authors' research7, 8), we investigate a method that can easily calculate the average wall shear-stress in laminar flows of viscoplastic fluids through concentric annuli. That is, using the results of circular pipe and parallel-plate, an approximate expression of viscosity factor in viscoplastic fluid flow through concentric annuli is derived and the error of the average wall shear-stress represented by the approximate equation is evaluated. Furthermore, a simpler approximate formula which can be calculated directly without numerical calculation is derived and its error is also evaluated. In addition, error assessment is performed to confirm the applicability of approximation by the flow in the parallel-plate for the flow in a concentric annulus, which has been conventionally done in the field of well drilling.

著者

伊藤 豊 竹内 誠人 見上 柊人 川村 洋平

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.136, no.5, pp.33-39, 2020-05-31 (Released:2020-05-27)

参考文献数

34

被引用文献数

1

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Productivity, safety and its improvement is also an integral part of a good mining operation. In recent times, due to constraints on time and cost, it has become increasingly harder to conduct training and safety inductions at mine sites. For the purpose of overcoming these limitations, the use of virtual reality (VR) is proposed for mining education and training. VR has already been introduced in the education and training of miners overseas, and quantitative studies on the effects of using VR for miner's education and training have been made. However, Japan has only one such application of VR for mining education, namely, “Virtual Mining Practice System” which was produced by Akita University, and there are relatively few cases where VR has been introduced in the Japanese mining industry. Furthermore, there has been no quantitative study to date on the effects of education using VR for mining education. Therefore, the objective of this study is to investigate the effects of a class that utilizes a VR application developed for mining education (Mining VR), as well as evaluate its learning outcomes. In this study, a method called randomized controlled trial (RCT) is used for evaluating Mining VR's effectiveness. Study participants are divided two groups randomly where one class makes use of Mining VR and another class using other non-VR material. After the classes are completed, a test is conducted and the average results of each group are compared by T-test. The results of this experiment showed that there were no statistically significant differences in skill of “understanding” and “knowledge retention” comparing two groups. On the other hand, results suggested that Mining VR has improved students'“ motivation” for class when using Mining VR.

著者

七沢 淳 武田 邦彦

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.113, no.12, pp.1049-1054, 1997-12-25 (Released:2011-01-27)

参考文献数

15

被引用文献数

1 1

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The separation unit, separation factor, total flow in separation system, energy requirement, and second wastes by separation for recycling system have been studied theoretically. Theoretical equationsof separation unit, and height of separation unit were introduced and it was pointed that the total flow in the separation unit was proportional inversely to the separation factor by two powers and the amount of the second waste materials is proportional to the factor. The second waste materials and the energy consumption should be considered in the aspect of the environmental assessment. The physical term and the social term have to be divided for the recycling separation more definitely than for the ordinal separation process.

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.30, no.355, pp.786-814, 1914-09-22 (Released:2011-07-13)

著者

上野 景明

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.32, no.375, pp.665-670, 1916-05-22 (Released:2011-07-13)

著者

上野 景明

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.32, no.376, pp.790-801, 1916-06-22 (Released:2011-07-13)