LOAD OF CUTTING UNITS DRIVES OF MINING EQUIPMENT. PART 1. METHODOLOGICAL APPROACHES TO MONITORING OF  TECHNICAL CONDITION OF SHEARER CUTTING UNIT BY  PARAMETERS OF ITS DRIVE LOAD

ROMANOVICH Alexander S., Director General, UPE “Niva”, Soligorsk District, Republic of Belarus

KANAPLIANIK Ivan A., Ph. D. in Eng., Deputy Director General for Technical Policy and Innovations, UPE “Niva”, Soligorsk District, Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.

A mathematical model of the load of the shearer drive of the drum type cutting unit is introduced. It takes into account the speed of its movement, the angular speed of rotation of the cutting unit, the taper angle of the cutting part and the number of picks. At design stage, its use makes it possible to determine the required rated drive power, taking into account sylvinite resistance to cutting, the tapering angle and the drum width, and during the shearer operation, to determine the actual value of potash resistance to cutting index in order to select the most efficient value from the standpoint of productivity, geometric parameters of picks and tooling for their fastening. Analytical dependencies are suggested, linking the cutting unit drive load and the cutting process performance with the modes of shearer operation, including its movement speed and speed of the cutting unit rotation, the taper angle of the picks and their quantity, the analysis of which showed that reducing the pick angle φ makes it possible to increase the capacity of the shearer by 10–20 % without increasing the cutting unit load. However, it is necessary to take into account the strength properties and wear resistance of the picks, the interrelation of the increasing thickness of the sheared layer with the design parameters of the picks and pick holders, and cutting depth influence on particle size distribution of the mined ore.

fluctuations of cutting force, modeling, load, modes of operation, drive, capacity

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