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<p>Effective beneficiation of lunar regolith for in situ resource utilisation (ISRU) requires size classification methods compatible with vacuum environments, where fluid-based systems are impractical. This study evaluates vibrational segregation as a dry alternative, using sealed-vial excitation under Earth gravity. We test Apollo sample 15601 alongside three lunar simulants (JSC-1, LMS-1, TUBS-M) across multiple vibrational conditions. Micro-CT imaging, Rosin–Rammler modelling, and Jensen–Shannon Divergence analysis quantify internal structure and simulant similarity. Mechanistic models of aerodynamic drag and bulk mobilisation clarify the roles of fines, cohesion, and confinement. A15601 develops a stable three-layer structure driven by fines immobilisation and coarse particle lofting. LMS-1 exhibits similar layering but weaker compaction. TUBS-M provides the closest statistical match, while JSC-1 segregates efficiently but less representatively. Particle size distribution breadth emerges as the primary driver of compaction and stratification. Though tested under terrestrial conditions, the findings offer a framework for evaluating simulants and designing passive ISRU separation systems.</p>

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Vibration-induced size segregation of lunar regolith and simulants for in situ resource utilisation (ISRU)

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年10月14日

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  • J. N. Rasera,
  • L. E. Salinas-Farran,
  • S. O. Starr,
  • V. Schein,
  • B. Lomax,
  • F. McDonald,
  • J. J. Cilliers,
  • K. Hadler

摘要

Effective beneficiation of lunar regolith for in situ resource utilisation (ISRU) requires size classification methods compatible with vacuum environments, where fluid-based systems are impractical. This study evaluates vibrational segregation as a dry alternative, using sealed-vial excitation under Earth gravity. We test Apollo sample 15601 alongside three lunar simulants (JSC-1, LMS-1, TUBS-M) across multiple vibrational conditions. Micro-CT imaging, Rosin–Rammler modelling, and Jensen–Shannon Divergence analysis quantify internal structure and simulant similarity. Mechanistic models of aerodynamic drag and bulk mobilisation clarify the roles of fines, cohesion, and confinement. A15601 develops a stable three-layer structure driven by fines immobilisation and coarse particle lofting. LMS-1 exhibits similar layering but weaker compaction. TUBS-M provides the closest statistical match, while JSC-1 segregates efficiently but less representatively. Particle size distribution breadth emerges as the primary driver of compaction and stratification. Though tested under terrestrial conditions, the findings offer a framework for evaluating simulants and designing passive ISRU separation systems.