RESEARCH OF THE FORMS OF MOTION TRAJECTORIES OF THE WORKING TOOL OF TOROIDAL PLANETARY EXECUTIVE UNITS OF MINING MACHINES

Abstract

Purpose. The purpose of this work is to determine and geometric analysis of possible forms of trajectories of the working tool, depending on the design and operating parameters of the torus planetary executive bodies of mining machines in the destruction of rock mass or minerals. Methods. Studies are based on the provisions of analytical and differential geometry, geometric modeling of objects, processes and phenomena, the theory of destruction of rocks and coal, as well as the theory of planetary executive bodies of mining machines. Results. On the basis of the mathematical model of the working process of the torus planetary executive body, the main forms of the trajectory of the spatial motion of a single working tool are considered, their geometric analysis is carried out. The characteristic features of the change in the shape of the trajectories are revealed when the values of the design and operating parameters of the executive body are varied, and their frequency is determined. Scientific novelty. For the first time, in the general case, a mathematical model of the process of movement of a single tool of a torus planetary executive body was analyzed in order to identify all possible characteristic forms of trajectories and, as a result, face surfaces, which constitute the basis for further research and optimization of the kinematic and dynamic characteristics of the process of destruction of a rock mass by executive bodies of mining machines. of the specified type. Practical significance. Scientifically substantiated data on the influence of the values ​​of the design and operating parameters on the parameters of the tool path, the degree of surface treatment of the face and the conditions for the transition of the torus executive body to other design cases of the planetary executive body have been obtained. All this in the future will make it possible to determine rational relationships between the design and operating parameters of the torus executive body, which will provide an effective “grid” of cutting, which will minimize the energy indicators of the destruction process and improve the fractional composition of the separated rock mass.