The necessity of working out the additional evaluation criterion to compare the movement trajectories for the working elements of loading organs of continuous action (LOCA) widely used in mining loading machines and heading combines is justified in the article. In the analysis of numerous LOCA varieties, both produced and existing in the form of patents, the evaluation is conducted only according to the performed trajectory of working organs movement, according to which the area of a single

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... ping is defined. It is difficult to make a well-grounded choice of machines in the absence of additional qualitative criteria. The proposal to evaluate the preformed trajectory quality by the average angle of the loaded material movement to the bunker of the receiving conveyer is brought forward for the first time based on the conducted investigation of the physical picture of forming capacity by loading organs of various types. The performed computer modeling permitted to confirm the efficiency of such approach. The proposed criterion of the trajectory efficiency evaluation will help the constructors to choose the parameters of LOCA well-grounded with the consideration of making loading process energy consuming minimum or making productivity maximum.