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Geomechanical state assessment and monitoring of rock mass displacement at the Voskhod deposit (Kazakhstan)

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Category: Content №3 2025

Last Updated on 25 June 2025

Published on 30 November -0001

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Authors:

S.Zhaparova, orcid.org/0000-0002-5346-5528, Sh. Ualikhanov Kokshetau University, Kokshetau, the Republic of Kazakhstan

D.Kaumetova*, orcid.org/0000-0003-4197-4891, Sh. Ualikhanov Kokshetau University, Kokshetau, the Republic of Kazakhstan, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

A.Alibekova, orcid.org/0009-0003-6537-9146, Sh. Ualikhanov Kokshetau University, Kokshetau, the Republic of Kazakhstan

T.Ibyrkhanov, orcid.org/0009-0001-6344-8270, Satbayev University, Almaty, the Republic of Kazakhstan

B.Nurmaganbetova, orcid.org/0000-0001-8018-4425, Ekibastuz Engineering and Technical Institute named after Academician K. Satpayev, Ekibastuz, the Republic of Kazakhstan

A.Mazhit, orcid.org/0009-0005-8645-6408, Ekibastuz Engineering and Technical Institute named after Academician K. Satpayev, Ekibastuz, the Republic of Kazakhstan

* Corresponding author e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

повний текст / full article

Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu. 2025, (3): 075 - 084

https://doi.org/10.33271/nvngu/2025-3/075

Abstract:

Purpose. The primary goal of this study is to conduct a comprehensive geomechanical assessment of the rock mass at the Voskhod deposit in order to optimize ore extraction techniques through numerical modelling and to evaluate the effect of pillar width on the stability of mine workings under complex mining and geological conditions.

Methodology. The study employs advanced numerical modelling techniques using Phase2 and RocLab software, enabling the simulation of realistic mining scenarios. The empirical Hoek–Brown failure criterion, integrated into stress-strain models, serves as the principal tool for evaluating the mechanical behaviour of rock masses. Laboratory testing data – including uniaxial compressive and tensile strengths, elastic modulus, cohesion, Poisson’s ratio, and other physical and mechanical properties – were utilized to generate strength classification charts for rock groupings.

Findings. The simulation outcomes indicate that reducing the width of protective pillars from 12 to 10 m significantly decreases the load-bearing capacity of the rock mass. This is manifested by an expansion of zones with insufficient strength reserves and a deterioration in the condition of inter-level pillars. Measurements from reference stations revealed that displacement rates increased more than fourfold during the transition from active mining to stabilization phases. Moreover, decreasing the distance to the production face led to an even more pronounced increase in deformation.

Originality. The novelty of the study lies in the integration of modern numerical modelling tools with in situ monitoring data, enabling the identification of critical dependencies between the geometry of mine workings and the dynamic response of the surrounding rock mass.

Practical value. The results obtained can be used to optimise the ore extraction technology at the Voskhod deposit, improve mining safety and reduce economic losses associated with cave-ins and emergencies.

Keywords: geomechanics, numerical modelling, pillar, stability of the rock mass, Voskhod deposit

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