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<p>Based on a case study of the track cross-cut in Liuzhuang Coal Mine’s western shaft bottom yard, this research investigates the deformation and failure behavior of weak surrounding rock in adjacent roadways subjected to excavation disturbance. A combined methodology was applied, including field measurement, similarity simulation, and numerical modeling, to analyze failure mechanisms and design a remediation strategy for the affected rock zone. Results indicate that roadway deformation primarily exhibits as cross-section convergence, influenced by surrounding rock strength, support resistance, and excavation disturbance. Stress affected zones from adjacent excavations overlap, expanding the unloading range, with the initially excavated roadway shielding stress redistribution in subsequent ones. Compared to shed support alone, the combination of full cables, steel sets, and an inverted arch reduced displacement growth by 95.31%. Numerical simulation validated that after repair, the maximum horizontal displacement increased by 63&#xa0;mm while the vertical stress peak dropped by4.05&#xa0;MPa. The integrated support system—combining active cables with passive shed and inverted arch—effectively stabilized the weak rock by enhancing self-bearing capacity, transferring stress deeper, and optimizing the stress environment. The findings offer practical guidance for repairing adjacent roadways under similar conditions.</p>

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Study on failure law and repair technology of weak surrounding rock in adjacent roadway under excavation disturbance

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年6月18日

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  • Xiaoping Wang,
  • Longyu Hu,
  • Lin Guo,
  • Xiangqian Wang,
  • Xue Li,
  • Xiang Cheng,
  • Junlong He,
  • Peiluo Wang,
  • Qingheng Gu

摘要

Based on a case study of the track cross-cut in Liuzhuang Coal Mine’s western shaft bottom yard, this research investigates the deformation and failure behavior of weak surrounding rock in adjacent roadways subjected to excavation disturbance. A combined methodology was applied, including field measurement, similarity simulation, and numerical modeling, to analyze failure mechanisms and design a remediation strategy for the affected rock zone. Results indicate that roadway deformation primarily exhibits as cross-section convergence, influenced by surrounding rock strength, support resistance, and excavation disturbance. Stress affected zones from adjacent excavations overlap, expanding the unloading range, with the initially excavated roadway shielding stress redistribution in subsequent ones. Compared to shed support alone, the combination of full cables, steel sets, and an inverted arch reduced displacement growth by 95.31%. Numerical simulation validated that after repair, the maximum horizontal displacement increased by 63 mm while the vertical stress peak dropped by4.05 MPa. The integrated support system—combining active cables with passive shed and inverted arch—effectively stabilized the weak rock by enhancing self-bearing capacity, transferring stress deeper, and optimizing the stress environment. The findings offer practical guidance for repairing adjacent roadways under similar conditions.