Analysis on Dynamic Changes of Roliai Laterite Nickel Mine from 2013 to 2020

In order to accurately obtain the mining activities of Roliai laterite nickel mine, based on remote sensing technology and object-oriented image analysis, methods multi-scale segmentation scale optimization optimal classification threshold selection were used extract nine activity elements from WorldView II images 2013 2020 respectively. According extraction results, dynamic changes each element analysed aspects area intensity. Our accuracy evaluation results showed that overall accuracies two are higher than 90%, Kappa coefficients 0.81. From 2020, intensity mine a trend rapid expansion whole, in which increased most, reaching 1.02 km 2 , average annual change was intense, corresponding dump also by about 0.35 . past seven years, has developed stage exploration forming relatively complete industrial chain mining, milling metallurgyy, entering development expansion.