| In the ecological restoration and remediation of historically abandoned mines, the stripping, utilization, and residual sales of earth and rock materials constitute the core links in the balance and supervision of project funds. To achieve accurate accounting of engineering quantities and optimization of supervision, this study leverages unmanned aerial vehicle (UAV) aerial survey data and integrates the model builder GIS software to construct three-dimensional (3D) models of mine topography, elevation, and slope. These models enable refined identification of the boundaries of surface exposed areas, earth-rock stockpiles, and remediation zones, and automatically generate an estimation model for earth-rock cut and fill volumes. The proposed method assists in rapidly ascertaining the quantities of earth and rock materials generated during restoration and remediation in the stage of abandoned mine status surveys, thereby facilitating the rational formulation of restoration project budgets, clarifying the expected revenue from the sales of earth and rock materials, ensuring that such revenues are incorporated into unified fiscal management, and prioritizing their allocation to ecological restoration initiatives. |