Research into the process of storage and recycling technogenic phosphogypsum placers

Moshynskyi, Viktor; Malanchuk, Zinovii; Tsymbaliuk, Valerii; Маланчук, Л. М.; Zhomyruk, Ruslan; Vasylchuk, Oleksandr

doi:10.33271/mining14.02.095

Cited by 29 publications

(32 citation statements)

References 39 publications

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“…The compacting stress V is the ratio of the total weight of overlying rocks (Р rock ) and the "floating" crown (Р cr ) to the total area of the "support" pillar cross section (S max ) [51][52][53][54] rock cr max max…”

Section: Resultsmentioning

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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Section: Resultsmentioning

confidence: 99%

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

et al. 2021

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“…At present, one of the most widely applied schemes consists in breaking ore by vertical blasthole rings on the vertical compensation space [4][5][6][7][8]. As a rule, it is used for ores with insufficient stability of horizontal, or even inclined, exposures of compensation rooms [1,47,49,50].…”

Section: Resultsmentioning

confidence: 99%

Technological measures to enhance efficiency of mining ore from stopes applying self-propelled equipment

Stupnik

Kalinichenko

et al. 2021

E3S Web Conf.

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The work analyzes current technologies of ore mining applying self-propelled equipment in underground conditions; studies practices of using the equipment in general and for broken ore transportation only; considers performance of mining enterprises in similar mining-geological and miningtechnical conditions; analyzes and generalizes causes of high ore loss and dilution rates in underground mining in Kryvyi Rih iron ore basin, thus revealing a problem of providing high efficiency and increased ore extraction with minimal quality deterioration. Marketable ore production is affected by decreased quality and high broken ore losses. Incomplete balance ore extraction when breaking and drawing ore from the stope results in deterioration of mining indices. Ore dilution with waste rocks leads to decreased ore content in the mined mass as compared with that in the ore massif. The research enables development and substantiation of the rational technology of ore drawing and transportation as well as designing a new structure of the loading face to ensure increase of the drawn ore quality indices.

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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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Research into the process of storage and recycling technogenic phosphogypsum placers

Cited by 29 publications

References 39 publications

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

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

Technological measures to enhance efficiency of mining ore from stopes applying self-propelled equipment

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

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