Authors: M.A. Vlasov, O.V. Gerasimov, S.M. Prostov

Title of the article: Forecast of stability of the soil base of a mining facility with a pile foundation based on a volumetric geomechanical model

Year: 2025, Issue: 3, Pages: 5-17

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

Index UDK: 624.131.7

DOI: 10.26730/1999-4125-2025-3-5-17

Abstract: The object of the study is the construction of a main ventilation fan of a coal mine, which is in an emergency condition. According to the results of engineering and geological surveys, it was found that the main reason for the occurrence of dangerous deformations of the foundations of structures is the heterogeneity of the properties of the foundation soils, which contributes to the occurrence of deformations and uneven precipitation, an increase in pressure at the edges of the foundation plate. Based on engineering and geological surveys, two schemes of a geomechanical model have been developed that provides a forecast of deformations and stresses in the natural and fixed state of the soil base. On the basis of the volumetric model, horizontal design sections were analyzed at a depth of 1 meter, based on this, the most dangerous sections were determined at depths z=-1 and z=-9 m, stress and strain distribution isolines for these sections of the soil base were constructed. For a more accurate prediction of the stress-strain state, integral indicators for the above sections were determined. The results of computer modeling have demonstrated the effectiveness of the pressure injection method in soft soil for controlling soil properties and stability of structures. For the considered object, it was found that the integral values of normal vertical stresses increase by 9-16% when fixing the soil base with respect to the decompressed soil, and the integral values of deformations increase by 45-53%. At the same time, a high level of horizontal deformations indicates an insufficient effect of the performed soil fixation. Thanks to the fastening, it was possible to reduce the pressure on the edges of the foundation plate. It is proposed to additionally provide for the construction of a retaining wall to reduce these deformations.

Key words: computer modeling mining engineering forecast stresses deformations soil fixation integral indicator geomechanical modeling

Receiving date: 14.10.2024

Approval date: 22.01.2025

Publication date: 26.06.2025

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