The problem of reliability of the assessment of displacements and deformations of rocks when using numerical modeling in surveying the protection of buildings from the harmful effects of sinking underground workings

The work is devoted to the study of the processes of displacement and deformation on the Earth’s surface during the phased excavation of the subway on the example of the Teatralnaya metro station in St. Petersburg using mathematical modeling methods and highlighting the main problems of ensuring the reliability of such a method. The features of construction, physical and mechanical properties of rocks in which mining operations are carried out are considered. The analysis of field data of surveying observations on the earth’s surface, in particular on the historical building of the Mariinsky Theater, was carried out. When studying the processes of displacement, the finite element method was used in the Plaxis 3D software package using data from field surveying observations on the Earth’s surface. Satisfactory convergence of the data of field surveying observations on the Earth’s surface and the results of modeling geomechanical processes is shown. According to the results of the research, four main stages of stabilization of vertical movements on the earth’s surface were identified, the values of slopes and curvature at each stage of construction were calculated. The calibration of the models was carried out in such a way that the results of mathematical modeling and field data had high convergence at all stages of the construction of station workings.

Mukminova D. Z., Volokhov E. M., Lebedev М. О. The problem of reliability of the assessment of displacements and deformations of rocks when using numerical modeling in surveying the protection of buildings from the harmful effectsof sinking underground workings. MIAB. Mining Inf. Anal. Bull. 2024;(11−1):39—56. [In Russ]. DOI: 10.25018/0236_1493_2024_111_0_39.

Mukminova D. Z.¹, Cand. Sci. (Eng.), Head of the Laboratory of Mine Surveying, e-mail: mukminova_dz@pers.spmi.ru , ORCID: 0000-0002-5595-9150;
Volokhov E. M.¹, Cand. Sci. (Eng.), Associate Professor, Associate Professor of the Department of Surveying, e-mail: volohov@spmi.ru , ORCID: 0000-0003-4430-4172; Lebedev М. О.2, Cand. Sci. (Eng.), Associate Professor, e-mail: MLebedev@lmgt.ru , Deputy Director General for Research, ORCID: 0000-0002-7749−442X;
¹ St. Petersburg Mining University of Empress Catherine II, 199106, Russia, rectorat@ spmi.ru
² OJSC “NIPII Lenmetrogiprotrans”, 191002,, SaintPetersburg,, Russia, mail@lmgt.ru

Mukminova D. Z., e-mail: mukminova_dz@pers.spmi.ru.

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