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<p>Rockburst is a dynamic geological hazard in deep underground engineering, and its prediction and prevention mechanisms are complex. To address the contradiction between low strength and high brittleness in current physical model materials for rockburst simulation, this study develops a low-strength, high-brittleness rock-like material using quartz sand, silicate cement, rosin powder, and rosin-alcohol solution. The material mix is optimized using the uniform design method, and its similarity is verified through uniaxial and conventional triaxial tests. Additionally, high-speed imaging and acoustic emission (AE) monitoring techniques are used to analyze the rockburst failure characteristics of both the rock-like material and granite under biaxial tests. The results show that the rock-like material and granite exhibit high similarity in stress–strain curves, failure modes, and energy release characteristics. Under biaxial testing, both materials display stages of particle ejection, flake splitting, buckling, and debris projection, with AE signal dominant frequency evolution highly consistent with crack propagation modes. This study provides a low-cost and highly similar experimental material and methodological support for investigating and preventing rockburst mechanisms in deep rock engineering.</p>

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A Highly Brittle Similar Material for Rock Burst Simulation Tests: Quantitative Evaluation and Experimental Validation

  • 期刊论文

  • 发表日期：

    2025年11月11日

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  • Hepeng Dong,
  • Qinghe Zhang,
  • Xiaorui Wang,
  • Tangxin Yuan,
  • Chuanbing Wang,
  • Shengtao Wang

摘要

Rockburst is a dynamic geological hazard in deep underground engineering, and its prediction and prevention mechanisms are complex. To address the contradiction between low strength and high brittleness in current physical model materials for rockburst simulation, this study develops a low-strength, high-brittleness rock-like material using quartz sand, silicate cement, rosin powder, and rosin-alcohol solution. The material mix is optimized using the uniform design method, and its similarity is verified through uniaxial and conventional triaxial tests. Additionally, high-speed imaging and acoustic emission (AE) monitoring techniques are used to analyze the rockburst failure characteristics of both the rock-like material and granite under biaxial tests. The results show that the rock-like material and granite exhibit high similarity in stress–strain curves, failure modes, and energy release characteristics. Under biaxial testing, both materials display stages of particle ejection, flake splitting, buckling, and debris projection, with AE signal dominant frequency evolution highly consistent with crack propagation modes. This study provides a low-cost and highly similar experimental material and methodological support for investigating and preventing rockburst mechanisms in deep rock engineering.