Risk Assessment of Geological Hazards in Mining Area Based on Multi-source Remote Sensing Data——A Case Study of Nayongzongling Coal Mining Area in Guizhou Province
In recent years,time-series InSAR technology has been widely used in surface deformation moni-toring.Traditional geological disaster risk assessment has problems such as poor timeliness and lag in dynamic updates.This article is based on the information volume-AHP model and SBAS-InSAR time series technology.First,it uses high-resolution images covering the study area and 2019-2021 SLC-level Sentinel-1A C-band radar data to extract disaster points and deformation points in the study area,and then selects the relative height difference.,slope,aspect,NDVI,rainfall,distance from faults,distance from goaf,surface deform-ation and other 8 geological disaster influencing factors to estimate the earthquake risk index of the study area;GDP,POP.roads,forest land,cultivated land and industrial and mining were selected For the land factor,the AHP analytic hierarchy process was used to weight and calculate the vulnerability index of each factor.Finally,the risk index and vulnerability index were combined to construct a regional geological disaster area risk assess-ment system,and a two-dimensional matrix table of risk and vulnerability was used to evaluate the risk.It car-ries out geological disaster risk assessment.The results show that the regional geological disaster risk assessment system constructed based on the information volume-AHP model and SBAS-InSAR technology is relatively rea-sonable,and the assessment results have a certain degree of timeliness and rationality.In addition,the evaluation results have important practical significance in mining area production and construction,disaster prevention and reduction,and other related aspects.
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