摘要详情
23 / 2025-07-09 22:32:34
Mining slope deformation monitoring and evolution characteristics analysis based on InSAR technology
Pusa landslide; SBAS-InSAR-POT; Mining-induced slope; Three-dimensional deformation; Deformation evolution characteristics
摘要待审
To monitor and mitigate landslide disasters induced by continuous slope deformation caused by underground mining in the mountainous regions of Guizhou, it is crucial to conduct long-term monitoring and analyze the full life-cycle evolution of mining-induced slope instability. This study focuses on the Pusa landslide in Nayong, Guizhou. A total of 139 ascending and descending Sentinel-1A SAR images acquired between 2016 and 2018 were collected. The Small Baseline Subset Interferometric Synthetic Aperture Radar (SBAS-InSAR) technique was applied to reconstruct the deformation history of the mining-induced slope in the Pusa area. Two-dimensional decomposition of dual-orbit data was performed to obtain vertical and east-west horizontal surface deformation components. Additionally, the Pixel Offset Tracking (POT) method was utilized to extract the deformation in the line-of-sight (LOS) direction. The results reveal that the maximum deformation rate in the source area of the Pusa landslide reached -58.47 mm/year. The cumulative deformations in the vertical, horizontal westward and azimuthal directions of the landslide source area before the catastrophe were 85 mm, 99 mm and 127 mm, respectively, and 61 mm horizontally to the east at the rear of the source area. The integration of SBAS-InSAR and POT techniques effectively characterized the three-dimensional deformation features and the spatiotemporal evolution of the mining-affected slope. The findings indicate that the deformation process of the Pusa mining-induced slope follows a complete life-cycle evolution pattern of: slow deformation - steady deformation - accelerated deformation - failure - stabilized deformation. Accelerated deformation exhibits a delayed response to long-term rainfall, while slope failure is associated with a short-duration, high-intensity rainfall lag. Moreover, horizontal displacement (i.e., crack propagation) lags behind vertical deformation. The deformation and failure process of the Pusa mining-induced slope can be divided into four stages: mining-induced disturbance, initial subsidence, crack propagation at the slope crest, and landslide formation.
重要日期
-
会议日期
08月23日
2025
至08月26日
2025
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07月10日 2025
初稿截稿日期
-
08月26日 2025
注册截止日期
主办单位
Southwest Jiaotong University, China (SWJTU)
International Consortium on Geo-disaster Reduction (ICGdR)
UNESCO Chair on Geoenvironmental Disaster Reduction
International Consortium on Geo-disaster Reduction (ICGdR)
UNESCO Chair on Geoenvironmental Disaster Reduction
承办单位
Southwest Jiaotong University, China (SWJTU)
International Consortium on Geo-disaster Reduction (ICGdR)
UNESCO Chair on Geoenvironmental Disaster Reduction
International Consortium on Geo-disaster Reduction (ICGdR)
UNESCO Chair on Geoenvironmental Disaster Reduction
联系方式
- Yufeng Wang
- wa******@swjtu.edu.cn
- +86********
