 Monitoring and numerical analysis of slope deformation in a coal mine in the southwest mountainous regions of ChinaXuwen Tian,
Xin Yao (),
Tao Tao,
Javed Iqbal,
Kaiyu Ren,
Zhenkai Zhou,
Chuangchuang Yao,
Qiyu Li,
Lingjing Li and
Zhenkui Gu
Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, 2025, vol. 121, issue 6, No 24, 6955-6979 Abstract: Abstract As underground coal mining activities are increasing in the southwestern mountainous areas of China, the geological safety issues related to ground subsidence and slope deformation have emerged as significant concerns. These issues have started to impact the routine mining operations. Monitoring deformation and analyzing the mechanical behavior of mining areas can help reveal the deformation patterns at surface level and on typical slopes in mountainous coalfields, ultimately reducing the risk of landslides. Taking the Guangfeng coal mine as a case study, this paper employs Interferometric Synthetic Aperture Radar (InSAR) and numerical simulation to analyze the influence of surface deformation caused by underground mining activities on slope deformation. The InSAR results indicate the presence of two distinct subsidence areas, labeled as I and II. The maximum annual subsidence rate in area I reaches 72 mm/a, while area II shows an annual deformation rate of 59 mm/a. The subsidence around the mined-out area has triggered sliding deformation in the slopes, which aligns with the numerical simulation results obtained from the fast Lagrangian analysis of continua in three dimensions (FLAC3D). As mining advances further into the working face, greater tensile stress develops at the rear edge of the slope, causing the subsidence at the center of surface which gradually shifts towards the top of the slope. The process of slope deformation related to underground coal mining in mountainous regions can be divided into four stages: the original slope stage, the early stage of underground mining, the evolution stage of composite slope deformation, and the stage of increased surface subsidence in the slope. By combining InSAR technology with FLAC3D numerical simulations, surface movements in mountainous mining areas can be accurately and reliably monitored and analyzed. This approach provides effective guidance for deformation monitoring and prediction of slope stability in mining regions. Keywords: Underground mining in mountain area; InSAR; Subsidence monitoring; Numerical simulation; Slope deformation (search for similar items in EconPapers) Downloads: (external link) Related works: Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text Persistent link: https://EconPapers.repec.org/RePEc:spr:nathaz:v:121:y:2025:i:6:d:10.1007_s11069-024-07066-2 Ordering information: This journal article can be ordered from DOI: 10.1007/s11069-024-07066-2 Access Statistics for this article Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards is currently edited by Thomas Glade, Tad S. Murty and Vladimír Schenk More articles in Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards from Springer, International Society for the Prevention and Mitigation of Natural Hazards |
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