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<p>Mining-induced catastrophic landslides in Southwest China pose severe threats to the ecological environment and human life. Taking the Nayong Landslide in Guizhou Province as a representative case study, this study systematically investigates the deformation and failure characteristics of the slope induced by mining. The evolutionary process of mining-induced landslide was examined, and a mechanical model of the overlying strata structure was established. Based on this model, mechanical criteria governing key block sliding instability and rotational deformation instability were derived. The results indicate the formation of collapse zones and ground fissures along the slope surface and trailing edge during the coal seam mining beneath the slope. Dense tensile cracks appeared at the trailing edge of the slope, while deeply developed shear cracks formed at the slope’s front edge. Consequently, dangerous rock masses collapsed, initiating a landslide. The mining-induced landslide evolved through four stages: fracture and subsidence of the overlying strata in the goaf, slope deformation and damage, overall slope instability, and sliding of the collapse-slide mass. The deformation and instability mechanism was characterised as a ‘shear instability–fragmented sliding collapse’ process. The study findings provide a theoretical foundation for the prevention of catastrophic landslide disasters induced by coal mining.</p>

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Deformation and instability mechanism of catastrophic landslide triggered by multiple coal seams repeated mining in peak cluster landforms

  • 期刊论文

  • 发表日期：

    2026年4月24日

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  • Lang Lu,
  • Feng Wang,
  • Yong-ning Luo,
  • Ming-ming Liu,
  • Hong-Yang Liu

摘要

Mining-induced catastrophic landslides in Southwest China pose severe threats to the ecological environment and human life. Taking the Nayong Landslide in Guizhou Province as a representative case study, this study systematically investigates the deformation and failure characteristics of the slope induced by mining. The evolutionary process of mining-induced landslide was examined, and a mechanical model of the overlying strata structure was established. Based on this model, mechanical criteria governing key block sliding instability and rotational deformation instability were derived. The results indicate the formation of collapse zones and ground fissures along the slope surface and trailing edge during the coal seam mining beneath the slope. Dense tensile cracks appeared at the trailing edge of the slope, while deeply developed shear cracks formed at the slope’s front edge. Consequently, dangerous rock masses collapsed, initiating a landslide. The mining-induced landslide evolved through four stages: fracture and subsidence of the overlying strata in the goaf, slope deformation and damage, overall slope instability, and sliding of the collapse-slide mass. The deformation and instability mechanism was characterised as a ‘shear instability–fragmented sliding collapse’ process. The study findings provide a theoretical foundation for the prevention of catastrophic landslide disasters induced by coal mining.