Abstract During the process of the executed conditions of interaction between working surfaces of wheel-rail mining machines bandages and rails the nature of deformations of interacting rough surfaces ledges in their spot of contact was defined. It is established, that in the interaction zone of a couple of wheel-rail industrial transport peculiar to plastic saturated contact processes occur. At plastic deformation, under the influence of the considerable loadings which are characteristic of the wheel-rail traction cars for industrial use, after all roughnesses of this planimetric platform have received considerable deformation, their base deformation occurs, having a plastic character. These deformations of roughness in the contact zone of their working surfaces contribute to an increase in the true area of their contact and, therefore, leads to ascending traction effort used in mining machinery. Ultimately, available reliable information about deformation characteristics of the processes, occurring in a spot of contact of the interacting surfaces of couple a wheel—rail will afford predicting theoretically expected calculated value of the realizable coefficient coupling and, therefore, the developed traction effort of mining machines. As a result of the executed research it is established, that when grinding the rails to ensure the height of asperities of the interacting surfaces of Rz of 20 μm the settlement coefficient of friction can be increased to 12% and, therefore, the connecting coefficient of a couple wheel-rail and also traction effort the wheel-rail mining machine can be raised.


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