Authors: M.A. Vlasov, S.M. Prostov

Title of the article: Forecast of stability of the soil base of a quarry concentrator based on volumetric geomechanical mode

Year: 2024, Issue: 4, Pages: 5-22

Branch of knowledge: 1.6.9. Geophysics, geophysical methods of prospecting for minerals

Index UDK: 624.131.7

DOI: 10.26730/1999-4125-2024-4-5-22

Abstract: The emergency section of the coal mine concentrator is considered. According to the results of engineering and geological surveys and geophysical studies, it was found that the main cause of dangerous deformations of the foundations of structures is the formation of zones of weakened foundation soils due to a landslide of an embankment array of one of the supports. Based on the constructed engineering and geological section and the physico-mechanical properties of soils, three model schemes were constructed, including a forecast of deformations and stresses in a natural soil base, decompressed and decompressed with a fixed state of the soil base. Calculated sections were carried out every 15 degrees relative to the center of the support, based on this, the most dangerous sections were determined, especially the characteristic sections (0, 75, 90, 135) with stress and strain distribution for all three models of the soil base. For a more accurate prediction of the stress-strain state, integral indicators were determined for each angle of rotation of the cross section for all three models of the soil base, with a natural soil base, decompressed and decompressed with a fixed state of the soil base. A plan and layout of the injectors was developed, which included the lengths of the injectors, the pitch and the length of the perforated part. Based on all the data, it was found out that the values of precipitation, as well as the values of stresses, that with a natural soil foundation, that with decompression with fixation, were identical, and the values of deformations decreased in comparison with decompressed soil. An assessment was made of the increase in the accuracy of calculating maximum voltages and strains, which amounted to 16.34% and 78.04%, respectively.

Key words: mining facilities forecast precipitation computer modeling voltages deformations soil consolidation integral indicator accuracy of the calculation

Receiving date: 13.04.2024

Approval date: 25.07.2024

Publication date: 26.09.2024

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