Ecological and technological aspects of iron-ore underground mining

Khomenko, Oleh; Kononenko, Maksym; Myronova, Inna

doi:10.15407/mining11.02.059

Cited by 24 publications

(20 citation statements)

References 10 publications

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“…The authors in the works [26 -31] propose to improve the process of the mined ore mass beneficiation by automating the process and taking into account the physical-chemical properties of minerals. This significantly increases the useful component content in the mined ore mass, however, the cost price of marketable products increases, production volumes decrease, and the ecological situation in the region worsens, which requires certain costs for its remediation [32,33]. Therefore, it is expedient to reduce the ore dilution directly in the block.…”

Section: Introductionmentioning

confidence: 99%

Mining of rich iron ore deposits of complex structure under the conditions of rock pressure development

et al. 2020

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The purpose of research is to increase the ore mass extraction ratio when mining rich iron ores by changing the shape of the stope chamber, as well as to substantiate its stable parameters under the conditions of the rock pressure manifestation. Used in mines existing methodologies for determining the structural elements of mining system are based on calculated equivalent spans of outcropping the stope chambers, which have a rectangular or tent shape. For the first time using the ANSYS software package, it has been determined that the formation of a compensation chamber of quasi-parabolic shape can significantly reduce the stresses concentration around the stope block. Thus, the formation of a stope chamber of a quasi-parabolic shape makes it possible to reduce vertical stresses as compared to horizontal ones without increasing horizontal pressure. When mining the extraction block, it is proposed to form the stope chamber of a quasi-parabolic shape with geometric parameters that directly depend on the parameters of the deposit, the depth of mining, and the direction of main stresses action. Dependences have been determined of the stresses value on the depth of mining and the physical properties of rocks, as well as on the length along the strike of the ore deposit. Thus, depending on the mining depth and length along the strike, rock pressure on the stope chamber of a quasi-parabolic shape decreases under non-uniform loading. The formation of a stope chamber of a quasi-parabolic shape will increase by 1.2 – 1.5 times the volume of pure ore that is recovered from the block.

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Section: Introductionmentioning

confidence: 99%

Mining of rich iron ore deposits of complex structure under the conditions of rock pressure development

et al. 2020

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“…As a result of the executed research in 2016 by means of the physical-and-chemical analysis and biological assessment of atmospheric air condition, decreasing in concentration of harmful substances which are emitted in atmospheric air during drilling-and-blasting operations after application of emulsion explosives [24] is established. Since 2010 for mine workings drivage on PJSC "ZZhRK" mines, emulsion explosives of Ukrainit-PM-2B in number of about 5 % of the total annual amount [25] is applied.…”

Section: I N I N Gmentioning

confidence: 99%

Increasing ecological safety during underground mining of iron-ore deposits

Khomenko¹,

Kononenko²,

Myronova³

et al. 2018

SBNMU

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Purpose. To create the technology increasing the level of ecological safety of underground mining of iron ores by means of decreasing the number of harmful substances released into the atmosphere.methodology. Laboratory and industrial research studies of the condition of the atmospheric air around mine arrangement were conducted by means of a physical-and-chemical method and biological testing. The standard method for calculation of their concentration in the atmosphere was used for determination of features of harmful substance dispersion.findings. Regularities of ground concentration of total influence of harmful substances changing with taking into account a specific consumption of explosives and distance from an emission source are revealed. The dependence of conditional indicator of damageability of bioindicators changing with increase in distance from a source of emission and specific consumption of explosives is established. The method for calculation of ecological assessment of atmospheric air condition around an emission source is developed.originality. Dependence of influence of ground concentration of harmful substances on damageability of bioindicators at the cellular and organismal levels is established, which allows estimating an ecological state of atmospheric air on industrial territories.Practical value. Regularities of inluence of ground concentration of total impact of harmful substances on a condition of indicator systems are determined that allows estimating the state of the environment and increasing reliability of local environmental monitoring around an iron-ore mine. The technology of drilling-and-blasting operations conducting in which emulsion explosives are used during mining of iron ores by means of the chamber mining methods, which allows decreasing the hazard index of harmful substances influence on the atmosphere, is developed and implemented.

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“…Обсяг капітальних вкладень на гірничі роботи у відсотках росте із збільшен-ням потужності шахт, також необхідно враховувати ризики пов'язані із забрудненням навколишнього середовища. [29,30,31].…”

Section: рисунок 3 приріст потужності шахт від обсягу інвестиційunclassified

State support of stability in Coal-Donbas regions

Mamaikin¹,

Pochepov²,

Fomychova³

et al. 2016

Fiziko-tehničeskie problemy gornogo proizvodstva

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Purpose. To develop a new approach to feasibility assessment mechanism of supporting production facilities of loss-making mines in Donetsk and Dnipropetrovsk regions. Methods. To solve the objective set, a complex approach was used including assessment of enterprise investment attractiveness, determination of production potential, definition of the ability to switch to a break-even mode. The process for planning ways to save the industrial potential of coal-mining regions may be considered as the reflection of multidimensional space (initial and design values) into the one-dimensional (amount of investment money). Findings. It has been established that on the stage of building a model for managing mine unprofitability decrease processes, it is necessary to overview 8-10 factorial features, which may determine the formation of economic potential, taking into consideration peculiarities of remaining deposit bedding and their quality, as integral assessment of mine potential in terms of (state and non-state) investment perception. The objective set comes down to selection of the minimum number of factors, which would the most adequately reflect the mine internal potential expressed by economic value addedas a consequence of interaction of factors of coal mine economic activities in specific mining, geological and technological conditions. Originality. The academic novelty is that as a complex component of the state of the loss-making mine, it is reasonable to use an indicator of economic reliability, which synthesizes the capacity of links, economic level of technical and economic indicators and the amount of remaining deposits. The latter determine the residual life of the mine, physical content of the proposed indicators is not identical, and it Физико-технические проблемы горного производства 2020, вып. 22 153 is this fact, which allows for their joint use to obtain a more complete estimate than when using any single indicator. Practical implications. Practical significance includes actual assessment of the state of Donbass coal enterprises and determination of marginal break-even indicators, which allowed for the formation of recommendations for attracting financial resources.

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Ecological and technological aspects of iron-ore underground mining

Cited by 24 publications

References 10 publications

Mining of rich iron ore deposits of complex structure under the conditions of rock pressure development

Mining of rich iron ore deposits of complex structure under the conditions of rock pressure development

Increasing ecological safety during underground mining of iron-ore deposits

State support of stability in Coal-Donbas regions

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