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<p>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.</p>

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

  • 期刊论文

  • 发表日期：

    2025年11月1日

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  • Anton I. Konurin,
  • Yury N. Shaposhnik,
  • Meruert A. Adylkanova,
  • Alexandr A. Neverov,
  • Sergey A. Neverov,
  • Sergey N. Shaposhnik

摘要

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.