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<p>Crack propagation is a major cause in rock destabilization and failure. This study investigates changes in interlayer resistivity and acoustic emission parameters during rock failure under uniaxial loading, focusing on rock-like materials with different crack geometries. The influence of crack geometry on resistivity response is analyzed, revealing a correlation between resistivity and the location and direction of crack initiation and propagation. The amplitudes of resistivity changes at various stages are compared. The results show that resistivity changes abruptly when the rock enters the plastic and failure stages. The resistivity index of rocks with different crack geometries generally exhibits a pattern of "slow change–fluctuation–sharp drop–sudden change". Based on the interlayer anisotropy characteristics of resistivity, the location and direction of cracks can be determined. During the elastic phase, the resistivity index variation across all layers remains below 0.06, whereas in the plastic phase, at least one layer exhibits a resistivity index change exceeding 0.1. A resistivity index variation of 0.1 can serve as an indicator of impending rock failure. A polynomial function was selected to develop a mathematical model describing the relationship between resistivity index and fracture structure, and its accuracy was validated using experimental results. This study aims to provide insights for preventing destabilizing failure in fractured rocks.</p>

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Characterization of Interlayer Resistivity Responses in Crack-Containing Rock-Like Materials and Analysis of Failure Precursors

  • 期刊论文

  • 发表日期：

    2026年3月30日

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  • Tingye Qi,
  • Hongtao Xu,
  • Guorui Feng,
  • Tian Qiu,
  • Haochen Wang,
  • Linfei Wang,
  • Siyuan Cheng,
  • Xinkai Qi,
  • Lubin Li

摘要

Crack propagation is a major cause in rock destabilization and failure. This study investigates changes in interlayer resistivity and acoustic emission parameters during rock failure under uniaxial loading, focusing on rock-like materials with different crack geometries. The influence of crack geometry on resistivity response is analyzed, revealing a correlation between resistivity and the location and direction of crack initiation and propagation. The amplitudes of resistivity changes at various stages are compared. The results show that resistivity changes abruptly when the rock enters the plastic and failure stages. The resistivity index of rocks with different crack geometries generally exhibits a pattern of "slow change–fluctuation–sharp drop–sudden change". Based on the interlayer anisotropy characteristics of resistivity, the location and direction of cracks can be determined. During the elastic phase, the resistivity index variation across all layers remains below 0.06, whereas in the plastic phase, at least one layer exhibits a resistivity index change exceeding 0.1. A resistivity index variation of 0.1 can serve as an indicator of impending rock failure. A polynomial function was selected to develop a mathematical model describing the relationship between resistivity index and fracture structure, and its accuracy was validated using experimental results. This study aims to provide insights for preventing destabilizing failure in fractured rocks.