In India, the overall coal production from opencast mining contributes nearly 95.64%. Opencast mining generates large amounts of overburden material in the mine area. The management of overburden materials and dumps is a challenging task for mining engineers. The failure of mine dumps can significantly affect coal production, machinery, and miner life. Therefore, mine dump stability analysis is essential for the mining industry. In recent years, unmanned aerial vehicles (UAV) paired with close-range photogrammetry techniques have been widely studied and used for structural monitoring applications. This investigation used UAV technology and 3D numerical modelling to analyse dump slope stability. This study aims to develop a scientific approach for monitoring the actual field conditions of a dump and identifying failure zones using the proposed technique. For this study, mines of the Raniganj Coalfields were selected, and suitable arrangements were made for data acquisition using UAVs. The finite element method (FEM) was used for the dump stability analysis. The results showed that the dumps were stable under static conditions, and the safety factor was 1.2. The overall approach comprising UAVs and the numerical tool was more robust, easy to use, and relatively cost-effective than the slope stability radar (SSR) and terrestrial laser scanner (TLS). The technical evaluation of this work strongly recommends that the approach may be used for a complete system of monitoring mine dumps and assessing the stability of the dump in a seamless manner.