No abstract

In this paper, an experimental study of the dependence of the coefficient of friction in the "sole-floor" system under various conditions is carried out. During the test, a tile was used as a support surface. Part of the sole of a special Shoe was placed on a tile and, slowly lifting the tile, determined the angle at which the movement of the Shoe sample begins. The sole and surface of the tile were specially prepared: cleaned before testing or applied a layer of graphite, rubbing into the surface. The studies were performed under various conditions: a clean Shoe sample and a clean surface, a Shoe sample and a surface contaminated with graphite dust. A graphite electrode powder with a grain size of no more than 0.1 mm was used as graphite dust. Graphite was applied to the tile surface in the form of a loose layer, or with a small seal. Analysis of the results shows that the highest coefficient of friction occurs between a clean Shoe sample and a clean floor surface, which is difficult to achieve in real production conditions. This combination is the safest in production conditions. The lowest coefficient of friction is obtained when a Shoe sample contaminated with graphite slides when there is a loose layer of graphite on the floor surface. This leads to the conclusion that it is necessary to clean the floor surface and shoes from carbon dust to ensure a safer environment for production workers in the presence of carbon-containing dust in the air of the working area. The results obtained can be useful for developing recommendations on the organization of safe working conditions at enterprises associated with the processing of carbon-containing materials.

The article deals with the issues of labor protection and monitoring of emergencies in workshops for the production of carbon electrodes. A numerical study of the problem of the spread of coal dust in the production room is carried out. The possible height of dust rise and the distance of movement of the most probable particle size are estimated. The data obtained indicate that in order to prevent coal dust from sticking to clothing and spreading it around the room, it is necessary to provide for labor protection measures. Based on the results obtained, recommendations can be formulated to improve safe working conditions in production associated with the formation of graphite dust: first of all, attention should be directed to the removal of a loose dust layer.