This article examines the interaction processes between the working components of load-haul-dump (LHD) machines and the rock mass under the highly complex operational conditions of underground mining. Analyses indicate that the contour sections of the bucket undergo intensive tribological wear as a result of contact with a heterogeneous medium characterized by high abrasiveness. Specifically, it was determined that during the penetration phase of the bucket into the rock mass, the maximum dynamic and contact stresses are concentrated in the zone of the cutting edge and teeth.