The master’s thesis examines the determination of remaining reserves of technical stone (dolomite) within the extraction area of the Zgornji Gabernik quarry by comparing the legally prescribed parallel profile method with a 3D volumetric calculation based on unmanned aerial vehicle (UAV) photogrammetry. The study aims to verify the consistency of the results, identify key sources of discrepancies, and assess the practical applicability of both methods for excavation planning and professional decision-making support.
In the parallel profile method, ten transverse profiles (P1–P10) were produced, dividing the area into eleven volumetric blocks. Block volumes were calculated using appropriate geometric equations (linear interpolation, trisection, wedge-shaped), with the choice depending on the difference between the cross-sectional areas of adjacent profiles. The total volume of the remaining reserves was determined to be 1,048,746 m³, of which economic (balance) reserves amount to 83,504 m³ and subeconomic (off-balance) reserves to 965,242 m³.
The 3D approach is based on an RTK-georeferenced UAV survey and photogrammetric processing of the images, from which digital products of the existing condition (DTM 2024) and the reference surface of the designed final state (DTM P) were created. The net volume, defined as the difference between the TIN surfaces of both states within the same spatial boundary, is 900,815.63 m³, approximately 14.1% lower than the result obtained with the profile method.
The results show that the two methods complement each other effectively. The profile method enables official categorization and classification of reserves, while the 3D approach provides a repeatable control calculation and efficient insight into spatial changes in the terrain.
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