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<p>In the study of deep dynamic disasters caused by rock explosions, rock-like materials are often used for physical simulation tests. To study the impact tendency and damage characteristics of rock-like materials, uniaxial compression damage tests, true triaxial tests, and elliptical roadway impact damage tests were conducted. These tests revealed the evolution of acoustic emission (AE) and infrared thermal imaging of rock-like materials during the impact damage process. The test results show that at the beginning of loading, the AE signal strength is at a low level. The AE counts and <i>b</i>-value are relatively stable, while the average infrared radiation temperature (IRT) of the rock-like material shows a decreasing trend. In the stress concentration area of the elliptical roadway samples, the temperature rises slowly. As the stress gradually increases, the AE counts and average infrared radiation temperature (AIRT) begin to rise slowly. Near the peak stress, both the AE counts and the AIRT increase significantly, while the AE b-value suddenly drops, leading to macroscopic damage. The research results provide theoretical support for studying the impact tendency and damage characteristics of rock-like materials and elliptical roadways.</p>

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The Physical Simulation Study on Impact Damage Characteristics of Deep Elliptical Roadway

  • 期刊论文

  • 发表日期：

    2025年2月19日

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  • Qingfeng Xu,
  • Shoujian Peng,
  • Jiang Xu,
  • Feng Jiao,
  • Yan Yang,
  • Chaolong Qin,
  • Xiaoli Nong,
  • Ming Li

摘要

In the study of deep dynamic disasters caused by rock explosions, rock-like materials are often used for physical simulation tests. To study the impact tendency and damage characteristics of rock-like materials, uniaxial compression damage tests, true triaxial tests, and elliptical roadway impact damage tests were conducted. These tests revealed the evolution of acoustic emission (AE) and infrared thermal imaging of rock-like materials during the impact damage process. The test results show that at the beginning of loading, the AE signal strength is at a low level. The AE counts and b-value are relatively stable, while the average infrared radiation temperature (IRT) of the rock-like material shows a decreasing trend. In the stress concentration area of the elliptical roadway samples, the temperature rises slowly. As the stress gradually increases, the AE counts and average infrared radiation temperature (AIRT) begin to rise slowly. Near the peak stress, both the AE counts and the AIRT increase significantly, while the AE b-value suddenly drops, leading to macroscopic damage. The research results provide theoretical support for studying the impact tendency and damage characteristics of rock-like materials and elliptical roadways.