Abstract
Slope stability monitoring in opencast mines is very important for the safety of workers and the equipment close to the overburden dump. Ground based Synthetic Aperture Radar (GBSAR) system is widely used due to its high accuracy in measurement and all weather capability. We developed FMCW GBSAR system first time in India and operated at Dudhichua, Northern Coal Ltd. This paper presents the initial results of its performance. GBSAR images are acquired over the mining area with a corner reflector placed at different locations. The raw data were processed for single look complex images so that radar interferometry technique can be used for monitoring the slopes. The backscattered power images show the benches in the mines very clearly with the SNR of 22 dB in VV polarization, A MATLAB tool was developed for processing the raw data. The validation of the system for phase stability, interferometric coherence, and time series real time monitoring is in progress.
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