Browsing by Author "Dedelyanova K."

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    Mining and geological conditions for the occurrence of sudden gas-dynamic phenomena in the coal mines of the Donets Basin
    (2024-01-01) Bezruchko K.; Vergelska N.; Dedelyanova K.; Pymonenko L.; Vergelska V.; Sira N.
    Over a long period in the development of coal deposits in the Donets Basin, a technogenic multi-level system of workings has been created. The increase in the number and power of gas-dynamic phenomena in coal mines occurred in connection with the increase in the working depth and the expansion of coal workings towards the technical limit of the mine field. The characteristics of the hydrocarbon component in the gas mixture of coal fields are constantly changing, and their content increases significantly in tectonically disturbed zones of coal rock massifs. Qualitative and quantitative parameters of gas mixture indicators are controlled by the tectonic structure of coal rock massifs. While studying the mining and geological conditions in the coal mines of the Donets basin, it has been established that the main factors provoking sudden gas-dynamic phenomena include tectonic discontinuous faults (as well as small-amplitude faults or their zones), abnormally high bed pressures, stress state and gas content of the massif. The results of the conducted research will become the foundation for predicting mining and geological conditions favorable for gas-dynamic phenomena in coal workings, which will make it possible to develop a concept for preventing potential dynamic phenomena in mines.
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    THE POTENTIAL FOR CARBON SEQUESTRATION IN RECLAIMED MINE SOIL
    (2024-01-01) Serafimova E.; Dedelyanova K.
    Mining sector has been the central attention of the business and public policy sustainable development scheme for several years. Reclamation territories are with potential carbon sequestration capacity in degraded mining areas and can be an impeccable option for achieving sustainable development goal-13. This paper made an investigation about the presence of heavy metals in reclaimed area possibilities to improve reclaimed soils with biochar with idea to enhance ecosystem carbon pool and atmospheric CO2 sequestration capacity to offset CO2 emission and soil organic carbon losses. The results show that the carbon content in biochar is 46.6 % and would be classified in class 2 according to the International Biochar Initiative. H/C and O/C atomic ratios could be useful for restoration of degraded poor mine soils through enhanced carbon sequestration. O/C ratio is 0.085 mol mol–1 and half-life of biochar is 2795.65 years, which confirm the biochar stability. For each kilogram of biochar incorporated into the soil, 144 g of carbon were sequestrated 52, 8 % CO2 emission reduction. Hence, the biochar developed in this study can be used in carbon-deficient soils with the added benefit of long-term carbon storage.