Bezruchko K., Balalaiev A., Sielski A., Hopkalo V., Hladka M. Impact of moisture on the physical–mechanical properties of donbas sandstones
- Details
- Parent Category: Geo-Technical Mechanics, 2024
- Category: Geo-Technical Mechanics, 2024, Issue 168
Geoteh. meh. 2024, 168, 49-60
https://doi.org/10.15407/geotm2024.168.049
IMPACT OF MOISTURE ON THE PHYSICAL-MECHANICAL PROPERTIES OF DONBAS SANDSTONES
1Bezruchko K., 1Balalaiev A., 2Sielski A., 1Hopkalo V., 1Hladka M.
1M.S. Poliakov Institute of Geotechnical Mechanics of the National Academy of Sciences of Ukraine
2Friedrich-Alexander University Erlangen-Nuremberg
UDC [552.513:539.217.3:556.332.2](477.52)
Language: English
Abstract. Ensuring the sustainable operation of the mining industry, in particular the coal and oil-gas industry, is connected with the prediction and research of natural and technogenic geomechanical processes occurring in rock massifs, which in turn involves the research and prediction of physical and mechanical properties of rocks and rock massifs in general. Given the well-known fact concerning the impact of rock moisture on their strength properties, it is necessary and relevant to determine the regularities of this impact on the formation of the properties of rocks and rock massifs as a whole. The purpose of the paper is to research the impact of the moisture content of sandstones in the coal-bearing strata on their physical and mechanical properties and to establish the regularities in the formation of their strength and elastic properties. Sandstones of the Lower and Middle Carboniferous age of the coal-bearing strata of the Donbas in the Central, Donetsk-Makiivskyi, and Pokrovskyi (formerly Krasnoarmiiskyi) geological and industrial districts were the object of the research. Sandstones lie in the zones of middle and late catagenesis, within the distribution of gas, fatty, and coking coal, which corresponds to the stages of MK2–МК4mesocatagenesis. As a result in determining the impact of the moisture content of sandstones in the coal-bearing strata on their physical and mechanical properties, the presence of the impact of the sandstone compaction degree and moisture on their strength properties was confirmed, namely on their ultimate compression strength. The most significant relationships are based on the results of pairwise correlation for pairs of indicators: compression strength - open porosity ratio, and compression strength – mass moisture. According to the results of multiple correlations, the impact of moisture and open porosity on the ultimate compressive strength of sandstones has been proven with fairly high correlation coefficients of 0.81–0.82. Appropriate models reflecting this connection as much as possible are proposed. This is a cubic, mixed, and adaptive piecewise-linear model MARS. The established regularities of connection between the indicators of the physical and mechanical properties of rocks and the quantitative moisture content will make it possible to successfully simulate the geomechanical processes occurring in the geological environment to predict the mining and geological conditions in working out of coal deposits.
Keywords: Donbas, sandstones, moisture, strength properties.
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About the authors:
Bezruchko Kostiantyn, Doctor of Geology Sciences (D.Sc.), Senior Researcher, Head of Department of Geology of Coal Beds at Great Depths, M.S. Poliakov Institute of Geotechnical Mechanicsof National Academy of Sciences of Ukraine (IGTM of the NAS of Ukraine), Dnipro, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it. , ORCID 0000-0002-3818-5624
Balalaiev Oleksandr, Candidate of Biological Sciences (Ph.D.), Senior Researcher, Senior Research in Department of Geology of Coal Beds at Great Depths, M.S. Poliakov Institute of Geotechnical Mechanicsof National Academy of Sciences of Ukraine (IGTM of the NAS of Ukraine), Dnipro, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it. , ORCID 0000-0002-9389-4562
Sielski Anna, Consultant of Faculty for History, Philosophy and Theology, Friedrich-Alexander University Erlangen-Nuremberg, Erlangen, Germany, This email address is being protected from spambots. You need JavaScript enabled to view it. , ORCID 0009-0005-2952-7409
Hopkalo Vitalii, Engineer of Department of Geology of Coal Beds at Great Depths, M.S. Poliakov Institute of Geotechnical Mechanics of the National Academy of Sciences of Ukraine (IGTM of the NAS of Ukraine), Dnipro, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it. , ORCID 0009-0005-2807-5148
Hladka Maria, Engineer in Department of Geology of Coal Beds at Great Depths, M.S. Poliakov Institute of Geotechnical Mechanics of the National Academy of Sciences of Ukraine (IGTM of the NAS of Ukraine), Dnipro, Ukraine,
This email address is being protected from spambots. You need JavaScript enabled to view it.
, ORCID 0000-0002-6539-7251
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 Bezruchko K., Balalaiev A., Sielski A., Hopkalo V., Hladka M. Impact of moisture | 1705 kB |