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Geophysical techniques are essential in underground mine planning as they offer critical insights into subsurface geology, ore bodies, structural features, and potential risks. Electrical Resistivity Tomography (ERT) is a widely used geophysical technique in this field. In the current study, ERT is applied to delineate the extent, geometry, and continuity of subsurface voids. By identifying high-resistivity zones related to ore bodies, mining operations can be better optimized, including excavation planning and hazard mitigation. ERT surveys also provide crucial details about geological structures, such as faults, fractures, and bedding planes, aiding in understanding ore deposition and designing safer, more efficient mining layouts.