Abstract. The article presents the power dependencies for determining the number of blades of the cutting body of geokhod for destruction of rocks of low hardness. The obtained dependences are based on the developed method of calculation of the blade cutting body of the geokhod. The presented dependences make it possible to choose the rational number of blades of the geokhod cutting body. The intensity of the development of underground space by the countries of the world community, including Russia, is increasing. In this connection, the tasks are to increase the rate of development and to reduce the cost of work.

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Modeling complex, curved surfaces of manufactured parts is an elaborate design task. The article discusses the development of a methodology for modeling a knife with a complex helicoid surface and a geokhod knife operating body in SolidWorks. The development of the modeling methodology presented in the article allows making constructive solutions not only for the knife-type operating body of any size, but for other types of geokhod operating bodies. In addition, the solid model of the operating body knife allows assessing the stress-strain state of the operating body elements.

a parametric model for a cutting body blade cutting edge contour of geokhod, which is a new class of mining equipment. The research relevance is due to the need to create a unified methodology for forming the cutting body cutting edge for geokhods of various sizes, since the cutting edge design parameters are heavily dependent on geokhod geometry and force parameters. The research objective is to obtain parametric equations for determining the geometric coordinates of the points of the geokhod cutting body blade cutting edge in Cartesian coordinates. Methods of research. The paper describes the principles of parameterization of the complex geometry of geokhod cutting body blade cutting edge. Research methods include the study of blade edge geometry, as well as its design parameters dependence on geokhod’s force and design parameters. To achieve that, analytical dependencies were selected from the method of calculating the cutting body force parameters, and then parametric functions affecting the cutting body cutting edge geometry were selected. Results. As a result, a geometric model of the cutting body cutting edge in a parametric form was obtained. To demonstrate the formation of the blade cutting edge contact with rock based on the obtained parametric-time dependencies, a computer program was developed with the calculated values probability construction. The dependence between the cutting edge geometry and the geokhod design parameters dictated the modeling of the cutting edge shape for geokhods of different diameters. Conclusions. The obtained parametric expressions for calculating the coordinates of geokhod cutting body contact make it possible to build contact lines of the blade and the rock mass according to the input data. Is has also been proved that geokhod cutting edge shape depends on the geokhod diameter, and its geometric parameters will be individual for each type of geokhod

In the article the geokhod bar working body characteristic point with a graphical method is determined. The research relevance has been considered. The information about the geokhods’ working bodies operating peculiarities is given. For the research objectives and tasks setting the geokhod bar working body characteristic point condition is defined. The 1.8 m diameter geokhod with a bar working body use conditions have been determined.On the ground of the research results the graph of changes of the geohod bar working body cutting force axial projection (PO.CV ) was constructed depending on the distance x by which the point is remote from the axis of rotation, as well as the geohod bar working body cutting force radial projection (RIO.CV ) dependence on the range from x to R g..The geokhod bar working body characteristic point has been foundin a graphical manner, i.e. it is the interception point of graphs of changes in the cutting force axial projection (PO.CV ) in the range from 0 to x at a distance from the point rotation axis over a distance x and the cutting force radial projection (RIO.CV ) within the range from x to R g at a distance from the point rotation axis over a distance x.