Advancement of Mine Opening Support Technologies when Drifting in Faulted and Intensely Fractured Conditions

Konurin A.I. Shaposhnik Y.N. Adylkanova M.A. Neverov A.A. Neverov S.A. Shaposhnik S.N.
2025 Springer

Indian Geotechnical Journal
2025

This study addresses the critical challenge of supporting mine openings in complex geomechanical conditions at the Rudny Altai polymetallic deposits. Comprehensive field and laboratory investigations characterized the rock mass, revealing intense fracturing, high in-situ stresses, and susceptibility to rapid strength degradation upon exposure to mine air. These factors lead to severe stability issues, including roof collapses and support failures. A suite of advanced support technologies was developed and validated, including: (1) the application of a polymeric membrane for immediate isolation of rock exposures; (2) advance consolidation of fractured ground through injection of microcements and polyurethane resins; and (3) backfilling of voids and domes with expansive phenolic foams. Finite element method (FEM) modeling and viscoelastic analysis demonstrated that advance injection reduces the potential fracturing zone by 40–60%, significantly enhancing stability. Field trials confirmed that this integrated approach facilitates safe drifting with a 30% increase in advance rates and reduces support rehabilitation costs by 30–40% compared to conventional methods. The implementation of a tailored geomechanical monitoring system, comprising load cells, tell-tales, and strain gauges, proved essential for proactive ground control. The results provide a validated, quantitative framework for managing extreme ground conditions in deep and challenging mining environments.

Deep mining , Finite element method (FEM) , Geomechanical monitoring , Ground improvement , Polyurethane injection , Rock mass classification , Rock mass consolidation , Underground support , Void backfilling , Yieldable support

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N.A. Chinakal Mining Institute, Siberian Branch of the Russian Academy of Sciences, Krasny Prospekt 54, Novosibirsk, 630091, Russian Federation
International School of Engineering, NJSC D. Serikbayev East Kazakhstan Technical University, D. Serikbayev Str. 19, Ust-Kamenogorsk, 070004, Kazakhstan

N.A. Chinakal Mining Institute
International School of Engineering

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