OBSERVATION OF AN OPEN-PIT COPPER MINE USING INSAR COHERENCE-BASED NORMALIZED DIFFERENCE ACTIVITY INDEX (NDAI)

초록

InSAR coherence detects random surface change that measures the activity or stability of the interferometric phase of InSAR data. Based on InSAR coherence, NDAI (Normalized Difference Activity Index) has been used to detect mining activity in the open pit mine. To remove the noise contained in coherence values, the newly defined NDAI provides only information due to the impact of mining activities. Mining activity analysis was used to understand the annual activity pattern of the mine, and from that to estimate the pushback design. The activities of the March 5 Youth mine took place in a clockwise direction. It was also possible to observe changes around newly formed surroundings, such as where topsoil is loaded or riverbanks This study is well appropriate for mines where site access is not possible. This method can be applied to other open-pit mine.

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