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<p>The strength and deformation behavior of rocks under different loading conditions are crucial for underground excavations, mining, foundations, and various civil engineering constructions, as they directly influence the stability of such structures. Understanding the anisotropic behaviors of rock through laboratory tests, such as the Uniaxial Compressive Strength (UCS) test and Point Load Test (PLT) on metamorphic or foliated rocks, provides essential information. Precise and standard laboratory tests reveal more insight into strength behaviors as the loading direction changes from 0° to 90°. The results exhibit a strong correlation between rock strength and anisotropic angle (β), which can be expressed mathematically in second-order parabolic equations. The mineral composition and its alignment greatly influence the rock’s anisotropy. Furthermore, a strong positive linear relationship was found between UCS and PLT in both a generalized form and individual correlation conditions. These findings provide useful correlations and anisotropy-based insights that can be directly applied to the safe design, stability assessment, and optimization of underground structures, foundations, and slope excavations, as well as drilling and blasting work in anisotropic rock masses. These developed equations can now be used as an alternative to expensive and complex laboratory tests.</p>

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⁠Analysis of strength anisotropy and correlation between UCS and point load test in augen gneiss at varying anisotropic angles

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年11月1日

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  • Anand Gupta,
  • Suman Panthee,
  • Ajita Bhandari,
  • Saroj Shrestha

摘要

The strength and deformation behavior of rocks under different loading conditions are crucial for underground excavations, mining, foundations, and various civil engineering constructions, as they directly influence the stability of such structures. Understanding the anisotropic behaviors of rock through laboratory tests, such as the Uniaxial Compressive Strength (UCS) test and Point Load Test (PLT) on metamorphic or foliated rocks, provides essential information. Precise and standard laboratory tests reveal more insight into strength behaviors as the loading direction changes from 0° to 90°. The results exhibit a strong correlation between rock strength and anisotropic angle (β), which can be expressed mathematically in second-order parabolic equations. The mineral composition and its alignment greatly influence the rock’s anisotropy. Furthermore, a strong positive linear relationship was found between UCS and PLT in both a generalized form and individual correlation conditions. These findings provide useful correlations and anisotropy-based insights that can be directly applied to the safe design, stability assessment, and optimization of underground structures, foundations, and slope excavations, as well as drilling and blasting work in anisotropic rock masses. These developed equations can now be used as an alternative to expensive and complex laboratory tests.