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

Title of the article: Prevention of dangerous deformations of the soil base of the ventilation installation based on a volumetric geomechanical model

Year: 2025, Issue: 4, Pages: 18-31

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

Index UDK: 624.131.7

DOI: 10.26730/1999-4125-2025-4-18-31

Abstract: The object of the study is the building of a shaft ventilation unit under construction. The purpose of the work is to prevent dangerous deformations of the reinforced soil base of a mining facility - the premises of the main ventilation fan of a coal mine on a slab–pile foundation with a retaining wall made of injectors based on a volumetric geomechanical model. For the foundations of structures with pronounced asymmetry of the fields of the VAT isolines, three-stage geomechanical modeling is necessary, including: determination of the average geomechanical center of the model for the most dangerous depth range of horizontal sections; establishment of the most dangerous vertical sections every 15 degrees relative to the geomechanical center of the model according to the maximum values stresses σ and deformations ε in horizontal sections with natural fixed ground bases and with the addition of a retaining wall of injectors; calculation and analysis of integral indicators Iσ and Iε. Thanks to the retaining wall and the adjustment of the fastening scheme, dangerous horizontal deformations are reduced. Compared with two-dimensional models, three-dimensional models make it possible to check any flat design section and determine the most dangerous of them. For the considered object, it was found that the integral values of normal vertical stresses during the fixation of the soil base with respect to the natural soil increase by 26-118%, the integral values of deformations increase by 117-531%. The integral values of normal vertical stresses with an additional support wall in relation to the fixed soil increase by 6-29%, the integral values of deformations will decrease by 3,5-8 times compared with the natural soil base.

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

Receiving date: 07.12.2024

Approval date: 22.04.2025

Publication date: 28.08.2025

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