Zobrazeno 1 - 10
of 61
pro vyhledávání: '"Roman Dychkovskyi"'
Publikováno v:
Energies, Vol 17, Iss 10, p 2289 (2024)
The novelty of the paper is the analysis of the possibilities of reducing the operating costs of a mine water pumping station in an abandoned coal mine. To meet the energy needs of the pumping station and reduce the carbon footprint, “green” ener
Externí odkaz:
https://doaj.org/article/0ea7c6167efc40919fe6321940de4dae
Autor:
Maksym Kononenko, Oleh Khomenko, Ihor Kovalenko, Andrii Kosenko, Roman Zahorodnii, Roman Dychkovskyi
Publikováno v:
Rudarsko-geološko-naftni Zbornik, Vol 38, Iss 3, Pp 19-28 (2023)
Experimental methods for determining a performance index of explosives are analysed: the methods of a ballistic pendulum, ballistic mortar, a lead block, and according to the volume of soil explosion funnel. It is defined that the determination of a
Externí odkaz:
https://doaj.org/article/8cd65ca2b3b14df89a41581f3ba7585e
Autor:
Oleh Khomenko, Dmytro Rudakov, Tsandgjav Lkhagva, Dariusz Sala, Valentyn Buketov, Roman Dychkovskyi
Publikováno v:
Rudarsko-geološko-naftni Zbornik, Vol 38, Iss 5, Pp 49-60 (2023)
This paper summarizes the results of evaluating uranium in-situ leaching (ISL) parameters for hydrogenous deposits in eastern Mongolia. This method, also known as in-situ recovery (ISR) or solution mining was proposed for mining used to extract urani
Externí odkaz:
https://doaj.org/article/dff9abf436fc4929b2559c84b5dd670c
Autor:
Oleksandr Vladyko, Dmytro Maltsev, Dariusz Sala, Dariusz Cichoń, Valentyn Buketov, Roman Dychkovskyi
Publikováno v:
Rudarsko-geološko-naftni Zbornik, Vol 37, Iss 5, Pp 169-180 (2022)
The use of similarity theorems for simulation of the technological process of mineral extraction is considered. The list of parameters that significantly influence the process of underground leaching of minerals is defined. Using these parameters and
Externí odkaz:
https://doaj.org/article/ba892e995ed248629d92ff1d07150811
Autor:
Vasyl Lozynskyi, Volodymyr Falshtynskyi, Pavlo Saik, Roman Dychkovskyi, Bakhyt Zhautikov, Edgar Cabana
Publikováno v:
Rudarsko-geološko-naftni Zbornik, Vol 37, Iss 5, Pp 61-74 (2022)
Underground coal gasification is an alternative method for mining coal from thin and ultra-thin seams, which enables conversion of solid fossil fuels into combustible gases at the site of coal occurrence. At the same time, in the case when the coal s
Externí odkaz:
https://doaj.org/article/40dc9f187c704443993e2a00aa534487
Publikováno v:
International Journal of Mining Science and Technology, Vol 30, Iss 2, Pp 265-269 (2020)
The purpose of this study was to develop a physico-mathematical model and technique for estimation of chemical bond stability depending on electric field intensity of an external point charge. A hypothesis for a possible physico-chemical mechanism of
Externí odkaz:
https://doaj.org/article/546713c626d64c13bd2b86fabd9437a2
Autor:
Oleksandr Haidai, Vladyslav Ruskykh, Nataliia Ulanova, Vira Prykhodko, Edgar Cáceres Cabana, Roman Dychkovskyi, Natalia Howaniec, Adam Smolinski
Publikováno v:
Energies, Vol 15, Iss 13, p 4653 (2022)
Ukrainian electricity production sector is in a critical situation. It is necessary to increase the coal production to ensure the continuity of electricity production. In this paper, an analysis of coal mining in western Donbas, Ukraine, was presente
Externí odkaz:
https://doaj.org/article/eac10c9f61bd4636be716af22ac42cc1
Autor:
Valeriy Nikolsky, Roman Dychkovskyi, Edgar Cáceres Cabana, Natalia Howaniec, Bartłomiej Jura, Katarzyna Widera, Adam Smoliński
Publikováno v:
Energies, Vol 15, Iss 4, p 1431 (2022)
The paper presents the results of analytical and experimental studies of the hydrodynamics of the translational−rotational motion of incompressible gas flow within a working space of a variable-geometry vortex heat generator. The terminal velocity
Externí odkaz:
https://doaj.org/article/43d9d75b28314aafae587fc30e262e53
Publikováno v:
Rudarsko-geološko-naftni Zbornik, Vol 33, Iss 4, Pp 73-82 (2018)
Sometimes in mining it is necessary to combine different extracting technologies within one enterprise. So, in the paper the analysis of scientific and technical mining operations with combined technologies is carried out, the search for structure an
Externí odkaz:
https://doaj.org/article/b609b7e172904ac6ad9944ebc661c757
Autor:
Oleg Bazaluk, Vasyl Lozynskyi, Volodymyr Falshtynskyi, Pavlo Saik, Roman Dychkovskyi, Edgar Cabana
Publikováno v:
Energies, Vol 14, Iss 14, p 4369 (2021)
This paper represents the results of experimental studies of physical modeling of the underground coal gasification process in terms of implementation of design and technological solutions aimed at intensification of a gasification process of thin co
Externí odkaz:
https://doaj.org/article/adee8d7fc1af431590729480471b9803