Substantiation of rational parameters of mine support system for underground roadways in difficult geological conditions

An integral part of underground mineral mining is construction of a system of large cross-section underground openings. In particular, the construction of batching-and-crushing rooms requires determining rational parameters of mine support systems to ensure stability of the underground openings for the whole service life of a mine. This article presents the substantiation of the mine support system parameters for underground openings for a batchingand-crushing system at Veduga gold deposit. The geomechanical model of the deposit is build, and the numerical modeling of change in the stress–strain behavior of rock mass at junctions of underground openings is performed using the finite element method. The modeling in Simulia Abaqus CAE uses the stability criteria for the exposed rock surfaces. In terms of Veduga deposit, two stability criteria are compared: the stress intensity criterion and the Q-index. Depending on the calculated category of stability, the rational parameters of mine support systems for a set of underground openings are selected and substantiated. The mine support system for the operational phase of the batching-and-crushing facility is selected. The chosen approaches to the stability estimation of underground openings are compared, and it is proposed to continue the research in the line of the analysis of influence exerted by the spatial arrangement of underground openings on their stability.

Trushko V. L., Baeva E. K. Substantiation of rational parameters of mine support system for underground roadways in difficult geological conditions. MIAB. Mining Inf. Anal. Bull. 2023;(12):55-69. [In Russ]. DOI: 10.25018/0236_1493_2023_12_0_55.

V.L. Trushko¹, Dr. Sci. (Eng.), Professor, e-mail: Trushko_VL@pers.spmi.ru, ORCID ID: 0000-0002-9742-1076,
E.K. Baeva¹, Graduate Student, e-mail: loka2708@rambler.ru, ORCID ID: 0000-0003-4213-6849,
¹ Empress Catherine II Saint-Petersburg Mining University, 199106, Saint-Petersburg, Russia.

E.K. Baeva, e-mail: loka2708@rambler.ru.

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