Results of Research into the Content of Rare Earth Materials in Man-Made Phosphogypsum Deposits

Malanchuk, Zinovii; Moshynskyi, Viktor; Malanchuk, Yevhenii; Корнієнко, В. І.; Koziar, Mykola

doi:10.4028/www.scientific.net/kem.844.77

Cited by 24 publications

(18 citation statements)

References 25 publications

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“…Significant achievements [3][4][5][6][7][8][9][10][11][12][13][14][15][16] in the theory of designing the boundaries of opencast mining belong to M.I. Goberman, W.W. Rzhevsky, V.S.…”

Section: Object and Methods Of Researchmentioning

confidence: 99%

Improving the methods for determining the promising boundaries of iron ore open pits

Lutsenko

Hryhoriev

Peregudov³

et al. 2021

E3S Web Conf.

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The article considers the determination of the final contours of the open pits. One of the problems of development of iron ore deposits at the present stage of development of opencast mining is described, which consists in the fact that in most open pits their working contours on the surface have reached final position. In these conditions, it is necessary to reevaluate the capabilities of the raw material base for further operation of mining enterprises. The analysis of scientific achievements in the decision of the final definition of the open pits` contours is executed. The well-known principle of determining the boundaries of opencast mining, the principle of which is to determine the boundaries based on a comparison of the allowable cost of ore production with the expected for the designed open pit. On the example of the open pits, which reflect the characteristic features of the development of steep-dipping deposits of Ukraine, the influence of current overburden ratio of the existing open pits on the economic overburden ratio, which serves as the main criterion in determining the boundaries of opencast mining for the designed open pits. A method for determining the boundaries of the open pits has been developed, which provides for the use of the economic overburden ratio of opening as a value not constant but variable over time, and one that depends on the change of current coefficients of opening in open pits-competitors. As a result, the theory in the field of determining the final contours of the open pits is improved. The new method differs from the known ones by taking into account the change in the economic overburden ratio over time, as well as determining the impact of technological indicators of open pits - competitors on the final depth of the designed open pit.

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“…Significant achievements [3][4][5][6][7][8][9][10][11][12][13][14][15][16] in the theory of designing the boundaries of opencast mining belong to M.I. Goberman, W.W. Rzhevsky, V.S.…”

Section: Object and Methods Of Researchmentioning

confidence: 99%

Improving the methods for determining the promising boundaries of iron ore open pits

Lutsenko

Hryhoriev

Peregudov³

et al. 2021

E3S Web Conf.

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“…Moreover, social aspects of functioning of the urbanized territories, within which minerals are mined, should also be involved [5,6]. Practically any human activity results in the emission of greenhouse gases [7,8], accumulation of wastes on the daily surface as result of mining activity [9][10][11][12]. Great attention is paid to the utilization of carbon dioxide [13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Gas hydrates technologies in the joint concept of geoenergy usage

et al. 2021

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The paper represents the analysis, which has helped to establish the usage of gas hydrate technologies in the methane conversion. This gas could be obtained in different ways. Possibilities and sources for the gas obtaining have been demonstrated. Use of other environmentally friendly sources to support operation in such systems in terms of joint energy complex has been considered. The necessary kinetic connections to provide operational sustainability of all the constituents have been given. The approach helps evaluate quantitatively the priority of its physicochemical transformations to obtain gas hydrates artificially. It is possible to transport methane at considerable distances when it is solidified. Actually, in this case there is no necessity to build costly compressor stations and pipelines for its transportation to consumers. The approach is extremely important for mining regions as it helps prolong the operating period and working out of the abandoned and off-balance coal reserves. In this case, it is proposed to apply special gasification technologies tending to maximum methane recovery. The proposed solutions give the possibility to define the trends of our further research. They will be highlighted in the following authors’ studies.

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“…Most of underground mines prefer stoping with pillar caving. Yet, in complicated mining and geological conditions rock pressure contributes to growth of workings maintenance costs and deterioration of extraction indices [9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Enhancement of the technology of mining steep ore bodies applying the “floating” crown

et al. 2021

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When mining ore bodies in Kryvyi Rih iron ore basin, underground mines apply open stoping or bulk caving systems in proportion of 55% to 45%. Most of underground mines prefer stoping with pillar caving. Yet, rock pressure contributes to growth of costs for workings maintenance and deterioration of extraction indices. Rock mass extraction indices can be enhanced by application of a protectve structure in the upper part of the block that will enable additional decrease in load on the draw level. There are a great many of methods for determining parameters of constructive elements of the protective structure that help keep its integrity for the whole period of block mining. The article suggests methods for determining parameters of the protective structure when mining steep ore bodies. The research conducted demonstrates that with the inclined protective structure, increase of unit load on it from 200 to 1200t/m2 leads to decrease of its thickness from 6.3-20.9m to 5.5-18.4m and increase of the crown length from 40m to 60m. The developed block caving system with application of the protective structure when mining steep ore bodies enables overall decrease of ore dilution in the block by 3%, increase of iron content in the mined ore by 1.3% without significant mining costs growth and decrease of loads on the workings of the receiving level.

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Results of Research into the Content of Rare Earth Materials in Man-Made Phosphogypsum Deposits

Cited by 24 publications

References 25 publications

Improving the methods for determining the promising boundaries of iron ore open pits

Improving the methods for determining the promising boundaries of iron ore open pits

Gas hydrates technologies in the joint concept of geoenergy usage

Enhancement of the technology of mining steep ore bodies applying the “floating” crown

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