This study addresses the often-overlooked phenomenon of material fragmentation during transportation in quarry production lines. Specifically, it investigates how mechanical energy—generated through impacts, vibrations, and height drops—affects the particle size distribution of dolomite rock during its movement from blasting to final storage. While crushing is the primary method of comminution, the research highlights that significant fragmentation also occurs during handling and transport. The aim of the research is to quantify the extent of material fragmentation caused by transportation processes and compare it with mechanical crushing, thereby evaluating the cumulative impact of both on particle size reduction and energy consumption. The tasks are set in this way: To measure potential energy changes and mechanical shock energy during material transport. To conduct controlled crushing experiments and calculate specific crushing energy using Bond’s law. To analyse particle size distribution before and after both transportation and crushing. To compare the effectiveness of transportation-induced fragmentation with mechanical crushing. The study found that transportation contributes significantly to material fragmentation, with potential energy values ranging from 0.049 to 0.078 MJ/t. crushing energy varied from 0.035 to 0.095 MJ/t, depending on the initial particle size. A 30.4% reduction in coarse particles (>16 mm) was observed during transport alone. Crushing further homogenized the material, reducing the average particle size to between 7.3 and 9.8 mm. These findings confirm that transportation processes play a non-negligible role in comminution and should be considered in energy efficiency assessments of quarry operations.