Identification of Potential Landslides in Rare Earth Mining Areas Based on SBAS-InSAR Technology
Ion-adsorbed type rare earth mining have greatly increased the probability of potential landslides in mining are-as due to the use of leaching mining methods.It is of great significance to identify potential landslide in rare earth mining area and predict the possible location and threat range of landslide in the early stage,which is of great significance for the ecologi-cal management and the protection of people's lives and property.Taking the Lingbei rare earth mining area as an example,based on long-term Sentinel-1A images,the SBAS-InSAR technology is used to obtain the spatial distribution of surface de-formation in the study area from 2019 to 2021,combined with Google Earth high-resolution images to study the slope distribu-tion and vegetation coverage and distribution in the study area,the possibility of potential landslides in typical mine sites and the relevent areas are analyzed.The results show that the surface of the Lingbei rare earth mining area is in a state of uneven deformation and there are several deformation areas of different scales.The surface deformation rate ranges from-25.48 mm/a to 16.05 mm/a.The deformation area is highly consistent with the lacations of rare earth mines,and both have basically same trends of deformation in the time dimension.The surface in the middle of the Lingbei mining area centered on the Jiazi-bei mining area shows an overall upward trend.The area represented by the Aobeitang mining area in the southeast of the Lingbei mining area is basically shows a state of subsidence.The overall slope of the mountain in the former area is relatively gentle,and the area of medium and high vegetation coverage is larger than the latter.Combining the influence of slope and vegetation coverage on landslides,it is judged that the latter is more likely to have potential landslides than the former.Based on the SBAS-InSAR technology,it is feasible to identify potential landslides in the rare earth mining area in southern Jiangxi,and it has a certain guiding role for local disaster warning research and mining area reclamation work.
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