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<p>It is necessary to study the stability of a rock mass in the mining area to determine the instability of the rock mass in the goaf. The rock mass stability of the Ningtiaota coal mine was studied utilizing on-site monitoring (acoustic monitoring method), discrete element numerical simulation, and negative Poisson’s ratio (NPR) anchor cable dynamics test. The results show that the strength of the rock mass in the mining area is low, the quality of the rock mass is poor, the degree of weathering is more prominent, and the degree of joint and fissure development is high. An anchor cable under the effect of the new NPR has a superior mechanical support effect and can be used to support and reinforce broken and weak surrounding rocks. Based on the analysis of the above experimental results, it is concluded that the NPR anchor cable has a superior mechanical effect on the reinforcement of the surrounding broken rock, which provides a scientific basis for stability research on other large-deformation, soft surrounding rocks.</p>

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A Case Study of Rock Mass Stability Based on Acoustic Monitoring and Numerical Simulation

  • 期刊论文

  • 发表日期：

    2025年9月1日

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  • Zhang Wei,
  • Ni Qian,
  • Zang Liyan,
  • Li Yong

摘要

It is necessary to study the stability of a rock mass in the mining area to determine the instability of the rock mass in the goaf. The rock mass stability of the Ningtiaota coal mine was studied utilizing on-site monitoring (acoustic monitoring method), discrete element numerical simulation, and negative Poisson’s ratio (NPR) anchor cable dynamics test. The results show that the strength of the rock mass in the mining area is low, the quality of the rock mass is poor, the degree of weathering is more prominent, and the degree of joint and fissure development is high. An anchor cable under the effect of the new NPR has a superior mechanical support effect and can be used to support and reinforce broken and weak surrounding rocks. Based on the analysis of the above experimental results, it is concluded that the NPR anchor cable has a superior mechanical effect on the reinforcement of the surrounding broken rock, which provides a scientific basis for stability research on other large-deformation, soft surrounding rocks.