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<p>To address issues such as severe deformation and failure of the surrounding rock in double-roadway remaining roadways, as well as the challenges of support and maintenance due to mining activities, a comprehensive research approach was employed. This approach included theoretical analysis, numerical simulations, and field tests to investigate the load transfer mechanism of the overlying rock influenced by mining. Additionally, the study examined the primary stress and its directional distribution characteristics in the surrounding rock of the remaining roadway. The evolution of the plastic zone and the stress distribution in the surrounding rock of the roadway, along with their interaction mechanisms, were analyzed. Furthermore, a control technology for the surrounding rock in the cutting top and side roadways was proposed. The research findings indicate that mining activities lead to a transfer of lateral overburden load, which increases and deflects the principal stress in the surrounding rock of the roadway. This alteration triggers coordinated changes between the plastic zone and the stress in the surrounding rock. The increase in principal stress, along with its directional deflection, causes the plastic zone in the surrounding rock to expand toward the direction of the minimum principal stress, resulting in new shear failures within the original plastic zone. The alteration of the plastic zone subsequently triggers a redistribution of stress in the surrounding rock. The minimum principal stress is deflected toward the direction of the plastic zone’s expansion, ultimately leading to asymmetric deformation of the surrounding rock in the roadway. Based on this, the surrounding rock control countermeasure of “cutting the roof and fixing the side” for roadways was proposed. Through engineering application, the convergence amounts of the surrounding rocks at the roof, floor, and sides of the roadway decreased by 61.7% and 53.4%, respectively. The deformation of the surrounding rock remained within a controllable range, demonstrating effective control over the surrounding rock.</p>

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Evolution and Control of Plastic Zone of Roadway Surrounding Rock Under the Influence of Mining

  • 期刊论文

  • 发表日期：

    2025年11月23日

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  • Qingbao Tang,
  • Ziwei Ding,
  • Jie Zhang,
  • Jindui Jia,
  • Guangqiang Di

摘要

To address issues such as severe deformation and failure of the surrounding rock in double-roadway remaining roadways, as well as the challenges of support and maintenance due to mining activities, a comprehensive research approach was employed. This approach included theoretical analysis, numerical simulations, and field tests to investigate the load transfer mechanism of the overlying rock influenced by mining. Additionally, the study examined the primary stress and its directional distribution characteristics in the surrounding rock of the remaining roadway. The evolution of the plastic zone and the stress distribution in the surrounding rock of the roadway, along with their interaction mechanisms, were analyzed. Furthermore, a control technology for the surrounding rock in the cutting top and side roadways was proposed. The research findings indicate that mining activities lead to a transfer of lateral overburden load, which increases and deflects the principal stress in the surrounding rock of the roadway. This alteration triggers coordinated changes between the plastic zone and the stress in the surrounding rock. The increase in principal stress, along with its directional deflection, causes the plastic zone in the surrounding rock to expand toward the direction of the minimum principal stress, resulting in new shear failures within the original plastic zone. The alteration of the plastic zone subsequently triggers a redistribution of stress in the surrounding rock. The minimum principal stress is deflected toward the direction of the plastic zone’s expansion, ultimately leading to asymmetric deformation of the surrounding rock in the roadway. Based on this, the surrounding rock control countermeasure of “cutting the roof and fixing the side” for roadways was proposed. Through engineering application, the convergence amounts of the surrounding rocks at the roof, floor, and sides of the roadway decreased by 61.7% and 53.4%, respectively. The deformation of the surrounding rock remained within a controllable range, demonstrating effective control over the surrounding rock.