Tendencies of coal industry development in Ukraine

Snihur, V.; Pavlohradvuhillia”, Pjsc “Dtek; Malashkevych, Dmytro; Vvedenska, Tetiana

doi:10.15407/mining10.02.001

Cited by 18 publications

(14 citation statements)

References 5 publications

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“…Despite the significant coal reserves, their extraction over time becomes more labour-consuming and cost-intensive, due to the complex mining and geological conditions of their occurrence [2,3]. These are, first of all, insignificant thickness of seams, low stability of the host rocks, considerable depth of the seams bedding, gas content, watercut and other factors [4,5]. The coal mined in such conditions becomes uncompetitive as its production cost may exceed its selling price [6].…”

Section: Introductionmentioning

confidence: 99%

Predicting the producing well stability in the place of its curving at the underground coal seams gasification

et al. 2019

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The relevant issues have been studied of ensuring the stability of producing wells in the place of their curving when uncovering the mining extracted area for the underground gas generator operation. It is emphasized that the design planning of efficient operation of underground gas generators in downhole gasification technology is impossible without consideration of the stress state of the rock massif, which can lead to a danger of the wellbore cutting and emergency shutdown of the technological system operation. The parameters of geomechanical models have been developed and substantiated for the study of the stress state of the “rock massif – producing well” system under the conditions of the Lviv-Volyn coal basin. A computer simulation has been performed of change in the stress state of a laminal massif around a well with a curvature radius in the range of 5 – 25 m with the use of the finite element method. The exponential function has been revealed of the tensile stresses value in the roof of the seam from the angle of the producing well entry into the coal seam. It is recommended the rational angle of a well entry into the coal seam, which is in the range of 21 – 28 degrees, and an appropriate curvature radius will be 5 – 10 m.

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Section: Introductionmentioning

confidence: 99%

Predicting the producing well stability in the place of its curving at the underground coal seams gasification

et al. 2019

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“…Today, in Ukraine, a signi cant amount (~ 50%) of minerals is mined by the underground method, of which almost 90% is extracted from solid coal minerals and about 60% -ore minerals. However, over the last decade, about 60% coal mines in the country were closed because of the exhaustion of industrial reserves (Snihur et al, 2016;Petlovanyi et al, 2018). In order to increase pro tability and reduce the number of closed extraction enterprises, it is possible to introduce additional development technology that will allow for the transformation of substandard reserves into industrial ones.…”

Section: Introductionmentioning

confidence: 99%

Some Aspects of the Compatibility of Mineral Mining Technologies

Dychkovskyi

Vladyko

Maltsev

et al. 2018

MGPB

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Sometimes in mining, it is necessary to combine di erent extracting technologies within one enterprise. So, in this paper, the analysis of scienti c and technical mining operations with combined technologies is carried out, and the search for structure and their operation in the mining enterprise is performed. The processes and technological parameters of mineral extraction by two fundamentally di erent technologies are investigated in detail. Due to the introduction of additional technologies, it is possible to involve sub-standard reserves in the production process, and an algorithm for determining the technological parameters is developed. This algorithm consists of criteria that make it possible to nd compatibility in the work of one or more development technologies while maintaining an e ective level of extraction. To do this, all processes at the enterprise are grouped: by degree of exploration, feasibility and economic e ciency. For each of them, certain coe cients were determined on the example of the operation of two speci c combined technologies: the extraction of uranium ores and coal. For each group of criteria, certain coe cients are identi ed that allow assessing the feasibility of applying technology in their area. Their product is a general coe cient of compatibility, which shows the feasibility of introducing additional technology at the enterprise with the feasibility study. It de nes the amount of funds invested in the development of an enterprise to achieve e cient mineral extraction with combined technologies within one enterprise. This point can be used to predict the grade variability of stockpiles from the origin source and the methodology allows characterizing the iron grades within stockpiles without any extra sampling.

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“…Problems arising from the restructuring of the coal sector, areas for further reforms and state support of the coal industry are reflected in the scientific works by famous Ukrainian scientists, in particular: M. Barabash and Yu. Cherednichenko [1], N. Zhy kalyak and V. Lukinova [2], V. Krasnyk [3], V. Sni hur, D. Ma lash kevych, T. Vvedenska [4], and others.…”

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confidence: 99%

“…As a way forward to growth of the coal industry, N. Zhy kaliak and V. Lukinov determine a sustainable system of fuel and energy resources of Ukraine for the period until 2030 taking into account the improvement of public rental policy, a balanced GDP growth, stimulation of technical and technological innovations, improving energy efficiency in industry and social sphere [2]. Snihur V., Malashkevych D. and Vvedenska Т. explo red the modern state of the coal mining industry, identified the root causes of low profitability of coal mining in the country and presented the perspectives of its development up to 2020 [4].…”

mentioning

confidence: 99%

“…According to N. Volynets, Chairman of the Independent trade Union of miners of Ukraine: "the price should be fair ... and taking into account the contributions to state enterpris-es-intermediaries, state coal mines get paid peanuts, and cannot even cover the cost" [10]. Other researchers have noted that in Ukraine coal is sold under direct contracts with the mining companies and consumers or with the state enterprise "Coal of Ukraine" as a wholesale market operator [4].…”

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confidence: 99%

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State support as a tool for development of enterprises of coal industry: current situation and problems

Лаговська¹,

Назаренко²,

Супрунова³

et al. 2018

SBNMU

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Purpose. To explore problems and prospects of Ukraine's coal industry functioning in crisis with the use of instruments of state support.methodology. There were used methods of analysis (analysis of policy documents and state financing), synthesis (systematic study of the influence of legal regulation and state funding on state operation of coal mines), monographs (the review of scientific views on problems of development of coal industry), research (identifying areas of use and the efficiency of budget expenditures) and the experiment (corrected the calculation of the amount of public funding, costs and losses of the coal industry).findings. Government support is the main form of supporting the operation of the coal industry. Analysis of policy documents and resolutions of the Cabinet of Ministers of Ukraine showed their declarative nature and lack of a systematic approach to reforming the coal industry. In terms of anti-terrorist operations, the loss of coal mining and the growth of accounts payable, finding an effective owner is a possible solution to this problem.Originality. System study of State support of development of coal industry in terms of the directions of use of budget funds and the elements was conducted. Pricing and the effect on profitability of coal enterprises were investigated. The adjustment of the volume of public funding due to changes in exchange rate of the hryvnia to the American dollar was carried out.Practical value. The research results can be used to improve the mechanism of the State support of enterprises of coal industry.

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Tendencies of coal industry development in Ukraine

Cited by 18 publications

References 5 publications

Predicting the producing well stability in the place of its curving at the underground coal seams gasification

Predicting the producing well stability in the place of its curving at the underground coal seams gasification

Some Aspects of the Compatibility of Mineral Mining Technologies

State support as a tool for development of enterprises of coal industry: current situation and problems

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