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Updated: Sep 10, 2025

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Development of Fault Similar Material for Model Test of Fault Water Inrush Disaster.

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  • 1School of Transportation and Civil Engineering, Shandong Jiaotong University, Jinan 250357, China.

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|August 28, 2025
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Summary

Researchers developed a new fault-simulating material for geomechanical model tests. This material accurately replicates tunnel water inrush disasters, guiding future disaster modeling and material selection.

Keywords:
fault water inrushmix ratiomodel testphysical–mechanical parameterssimilar material

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Area of Science:

  • Geotechnical Engineering
  • Rock Mechanics
  • Disaster Engineering

Background:

  • Geomechanical model tests are crucial for understanding tunnel disasters.
  • Accurate simulation of fault zones is essential for reliable geomechanical model test results.
  • Water inrush disasters in tunnels crossing fault zones pose significant risks.

Purpose of the Study:

  • To investigate the multi-physical field evolution mechanism of surrounding rocks during water inrush disasters in tunnels crossing fault zones.
  • To develop a suitable fault-simulating material for geomechanical model tests.
  • To determine the influence of different component ratios on material properties.

Main Methods:

  • Applied similarity theory to analyze prototype rock mass parameters and determine target values for similar materials.
  • Developed a fault-simulating material using sand, talcum powder, gypsum, clay, and Vaseline through laboratory experiments.
  • Synergistically regulated parameters like uniaxial compressive strength, permeability coefficient, unit weight, and elastic modulus, using deformation and strength failure characteristics as control indicators.

Main Results:

  • The developed similar material's uniaxial compressive strength and permeability coefficient are primarily influenced by gypsum and Vaseline.
  • Cohesion of the similar material is mainly controlled by clay and Vaseline.
  • The material successfully reproduced the disaster evolution process in a model test of tunnel fault water inrush.

Conclusions:

  • The developed fault-simulating material meets the requirements for geomechanical model tests of faults.
  • The study provides valuable guidance for selecting similar materials and optimizing mix proportions for fault disaster model tests.
  • This research enhances the accuracy and reliability of geomechanical model tests for tunnel water inrush disasters.