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<p>This study investigates the dynamic evolution of dolomite rock strength under karstification in karst terrains. Grounded in damage mechanics and Lemaitre’s strain equivalence principle with extensions, the research integrates physical experimentation and theoretical analysis to simulate karst processes. Uniaxial compression tests were performed on naturally karst-affected dolomite specimens. The evolution of strength and failure characteristics in karst-modified dolomite was examined. Water-induced, porosity-induced, and force-induced damage variables for dolomite were quantified. A constitutive model describing the failure of karstified dolomite under uniaxial compression was established. Validation confirmed congruence between the equation-derived curve and the experimentally obtained stress–strain curve. The developed karst damage constitutive model effectively characterizes the strength variation features of dolomite with differing solubilities, providing theoretical support for studying mining-induced overburden movement laws in karst geological settings.</p>

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Damage Evolution Modeling of Karst-Affected Dolomite Under Uniaxial Compression

  • 期刊论文

  • 发表日期：

    2025年8月21日

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  • Cheng Li,
  • Chen Wang,
  • Yujun Zuo,
  • Zichen Li,
  • Chaoyuan Yong,
  • Mingguang Wu

摘要

This study investigates the dynamic evolution of dolomite rock strength under karstification in karst terrains. Grounded in damage mechanics and Lemaitre’s strain equivalence principle with extensions, the research integrates physical experimentation and theoretical analysis to simulate karst processes. Uniaxial compression tests were performed on naturally karst-affected dolomite specimens. The evolution of strength and failure characteristics in karst-modified dolomite was examined. Water-induced, porosity-induced, and force-induced damage variables for dolomite were quantified. A constitutive model describing the failure of karstified dolomite under uniaxial compression was established. Validation confirmed congruence between the equation-derived curve and the experimentally obtained stress–strain curve. The developed karst damage constitutive model effectively characterizes the strength variation features of dolomite with differing solubilities, providing theoretical support for studying mining-induced overburden movement laws in karst geological settings.