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<p>Underground coal mining involves operational issues in assuring the safe, efficient, and fatigue-free movement of personnel down steep, curving, and spatially constrained haulage routes. The Man Rider Chair Lift (MRCL) system is a mechanical way to get around that meets the safety standards set by IS 17242:2019 and DGMS. But there isn’t enough scientific testing that takes into account the individual site conditions to prove its structural integrity and long-term reliability. This study gives a full performance review of an MRCL installation on a 1396-m-long Stage-I track in an Indian underground coal mine. A single evaluation framework that combines mathematical modeling (pulling force, slope resistance, and suspension load), exponential reliability theory (stress-strength interference model) has been proposed to figure out the Factor of Safety (FoS) at different haulage gradients. The MRCL system had a Factor of Safety of 15.18, which is much greater than the DGMS-required minimum of 10. The system was more than 91% reliable, which showed that the design was strong and could work well in tough underground conditions. The system’s mechanical adequacy and operational consistency under dynamic settings were confirmed by the multi-method examination. The novelty of the study lies in its interdisciplinary integration of force-based analytics, exponential reliability modeling, and graphical visualization into a single assessment framework.</p>

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Factor of Safety and Reliability Mapping of Man Rider Chair Lift in Inclined and Curved Mine Routes

  • 期刊论文

  • 发表日期：

    2025年10月19日

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  • Mohd Ahtesham Hussain Siddiqui,
  • Piush Raj,
  • Ramesh P. Sah,
  • Saurabh Dewangan

摘要

Underground coal mining involves operational issues in assuring the safe, efficient, and fatigue-free movement of personnel down steep, curving, and spatially constrained haulage routes. The Man Rider Chair Lift (MRCL) system is a mechanical way to get around that meets the safety standards set by IS 17242:2019 and DGMS. But there isn’t enough scientific testing that takes into account the individual site conditions to prove its structural integrity and long-term reliability. This study gives a full performance review of an MRCL installation on a 1396-m-long Stage-I track in an Indian underground coal mine. A single evaluation framework that combines mathematical modeling (pulling force, slope resistance, and suspension load), exponential reliability theory (stress-strength interference model) has been proposed to figure out the Factor of Safety (FoS) at different haulage gradients. The MRCL system had a Factor of Safety of 15.18, which is much greater than the DGMS-required minimum of 10. The system was more than 91% reliable, which showed that the design was strong and could work well in tough underground conditions. The system’s mechanical adequacy and operational consistency under dynamic settings were confirmed by the multi-method examination. The novelty of the study lies in its interdisciplinary integration of force-based analytics, exponential reliability modeling, and graphical visualization into a single assessment framework.