ANALYSIS OF THE EFFECTIVENESS OF OPERATION MODES OF SHEARERS VIA MODERN REGULATORS

Abstract

The objective is to perform an analysis of the effectiveness of modern load regulators in conditions of limited loading capacity of the executive bodies of shearers to form recommendations for adapting the existing algorithms of automatic control of the shearers taking into account the mining and geological conditions of thin coal seams. Method. To obtain the working characteristics of the shearer in order to analyze the efficiency of the load regulator based on them, simulation modeling of the processes of the destruction of the coal massif by the executive body, loading of coal onto the slaughter conveyor, as well as the processes of energy conversion in the electric cutting drive was used. At the same time, the real technical characteristics of the shearer and the mining and geological parameters of one of the seams, which was developed in the past by a mining enterprise of Ukraine, were taken as the initial data. The results. The analysis of the efficiency of modern load regulators of shearer showed that in the conditions of thin coal seams, the main limitation of the feed rate of shearers is the prevention of jamming of the executive body. It is this limitation that significantly affects the efficiency of modern load regulators on shearers based on the criterion of minimum specific energy consumption. At the same time, the effectiveness of the regulator can be estimated by the location of the point corresponding to the current mode of operation of the shearer on the graph of the static dependence of the engine power of the cutting drive and the specific energy consumption for coal mining on the feed rate of the shearer. The analysis of this schedule made it possible to identify the conditions for the efficient operation of the shearer according to the criteria of productivity, specific energy consumption and coal quality, and to offer appropriate recommendations for improving the control algorithms used in modern load regulators of shearers. Practical meaning. The revealed regularities regarding the dependence of the productivity of the shearer and the specific energy consumption for coal mining on the modes of operation of the shearer will make it possible to take into account the phenomenon of jamming the executive body in the algorithm of automatic control of modern load regulators, and due to this, reduce unjustified consumption of electricity during the operation of the shearer.