Authors: V.V. Aksenov, V.Yu. Sadovets, D.А. Pashkov, A.Yu. Zakharov

Title of the article: Influence of the shape of the cutting edge on the cutting force of the knife executive body

Year: 2020, Issue: 1, Pages: 30-36

Branch of knowledge: 05.05.06 Mining machines

Index UDK: 622.23.05

DOI: 10.26730/1816-4528-2020-1-30-36

Abstract: The main device of the mining machine for the formation of a cavity in the underground space is the executive body that destroys the rock mass. The power and geometric parameters of the Executive bodies are fundamental in the development and design of mining machine systems. During the excavation in soft and loose rocks, the knife executive body is used in Geokhod technology. When determining the power parameters of the knife executive body of the geokhod, only two geometric indicators of the shape of the knife are taken into account: the helicoid and the angle of its inclination relative to the axis of the geokhod. In addition to these geometric indicators, there is another one – the shape of the cutting edge of the knife of the executive body. The previously developed method for calculating the knife executive body of the geokhod does not take this indicator into account. The purpose of this work is to determine the influence of the shape of the cutting edge of the knife executive body of the geokhod when soft rocks are destroyed on the value of the force when cutting is blocked. The studies shown in the article suggest that the shape of geokhod executive body knife affects only the power required to overcome frontal component of ground resistance to cutting on the front face of the knife. This conclusion allowed us to determine the effect of the shape of the executive body knife on the force of the blocked cutting. As a result of the study, it was found that when the knife cut into the entire depth of cut and the face surface was formed according to the shape of the knife of the geokhod executive body, the shape of the cutting edge does not affect the forces of the blocked cutting. In further studies, it is necessary to determine the effect of the shape of the cutting edge of the executive body on the force of blocked cutting when the shape of the knife and the shape of the face surface do not match. This situation occurs when the knife of geokhod executive body is notched.

Key words: mining machine geokhod technology of geokhod executive body knife

Receiving date: 17.03.2020

Publication date: 14.06.2020

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