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This article is focused on solving the problem of power supply for the mining and industrial regions of Ukraine. This problem is caused by a significant import dependence on natural gas, the lack of efficient technologies in the integrated development of the energy resources of gas-coal deposits and the deterioration of social and economic, as well as environmental conditions in mining regions. As a promising direction for solving the problem of rational use of methane from coal mines and reducing the hazardous gas emissions into the atmosphere, the implementation of gas hydrate technologies into the technological complex of a coal mine has been proposed. The Clausius-Clapeyron equation has been improved for the conditions of gas hydrates formation, which considers the presence of an excess in non-equilibrium defects and is supplemented, taking into account the thermal effect of phase transformations, with all the time positive thermal effect of the defects relaxation. It has been revealed that one can intentionally control the relaxation energy of defects by the thermodynamic stimulus of phase transformations in the process of hydrate formation. The experimental dependences have been determined of the change in hydrate accumulation on the time of hydrate formation, with the methane hydrates production and taking into account the parameters of pressure and temperature. It has been revealed that the maximum fast time of hydrate formation at T = 1°C and P = 10 MPa is the time which amounts to 2.5 hours. The experimental dependences have been determined of the gas hydrates formation out of a methane-air mixture of degassing holes, on the methane concentration, on pressure and temperature parameters. It has been determined that the greater the methane concentration in the mixture, the greater must be the pressure in the system for the gas hydrates formation.

and Nature Resources use Sobornaya str., 11, Rivne, Ukraine, 33028Досліджені основні закономірності про-цесів видобутку бурштину на денну поверх-ню з піщаних бурштиноносних родовищ гід-ромеханічним способом із застосуванням інтенсифікаторів та запропонована нова технологія з вибором раціональних пара-метрів видобутку. Встановлені закономір-ності впливу води і повітря на розріджен-ня піщаних середовищ, які залежать від інтенсивності подачі в бурштиноносний масив газорідинної суміші Ключові слова: бурштин, зрідження, сегрегація, гідромеханічний спосіб, вібро-гідравлічний інтенсифікатор, вібровипро-мінювач Исследованы основные закономерно-сти процессов добычи янтаря на дневную поверхность из песчаных янтареносных месторождений гидромеханическим спо-собом с использованием интенсифика-торов и предложены новые технологии с выбором рациональных параметров добы-чи. Установлены закономерности влияния воды и воздуха на разжижение песчаных сред, которые зависят от интенсивности подачи в янтареносный массив газожид-костной смеси Ключевые слова: янтарь, ожижение, сегрегация, гидромеханический способ, виброгидравлический интенсификатор, виброизлучатль UDC 622.232.5:622.2

Purpose. To study conditions of forming the zones of high metal concentration in metal-containing man-made deposits. To assess the likelihood of metal concentration in the placer core.Methods. Analysis of the conditions determining metal-containing placers formation and of metal losses at mining and processing plants, considering the local terrain. Findings.It is proved that the minerals that are carried away from the separators at mining and processing plants are concentrated in the core, which contains up to 90% of heavy metals.Originality. The studies have determined the main factors and regularities governing the distribution of heavy metals in technogenic placers, which help identify their location and calculate parameters of high metal concentration zones in the body of a man-made deposit.Practical implications. The research has proved the possibility of using metal-containing technogenic placers, and finding the zones of maximum metal concentration on the basis of the established regularities. The authors have developed a mathematical model of the gradual formation of technogenic deposits with zones of heavy metals concentration in metal-containing waste.