No abstract

The purpose of the study is to examine the issues of assessing the anthropogenic impact on the ecosystem and sustainable development of a region using the example of Kuzbass. The subject of the study is to substantiate the need to improve the measurements of sustainable development of the regional economy from the point of view of calculating the “ecological and carbon footprints” of Kuzbass, identifying the effect of decoupling the negative impact on the environment and resource consumption in the process of economic activity of coal mining enterprises. The following tasks are solved: 1. The role of the environmental factor in ensuring sustainability of the resource-producing region development is shown. 2. The possibilities of using the “ecological footprint” and the “carbon footprint” as indicators of sustainable development of Kuzbass are discovered. 3. The role of mining enterprises in the formation of the “carbon footprint” in Kuzbass was revealed. 4. The calculation was carried out and the effect of decoupling in the coal mining of Kuzbass in 2013-2017 was revealed. 5. The necessity of including the indicators of “ecological footprint”, “carbon footprint” and the effect of decoupling in the coal mining in the system for assessing sustainable development of the mining region in accordance with the UN sustainable development goals (hereinafter - the UN SDGs) is justified. 5. It is argued that it is necessary to expand voluntary greening of enterprises in the coal mining of Kuzbass. Research methods are elements of system and integrated approaches, comparative analysis methods.

Grinding with flexible backing grinding tools, such as flap wheels and grinding belts, has found wide application at all stages from roughing to decorative surface finish. At the same time, the performance of traditional factory-built flap wheels and grinding belts in many respects do not meet the expectations of consumers. Among other reasons, this is due to the fact that the designs of flap wheels and grinding belts are based on traditional sandpaper. In turn, the sandpaper is made from abrasive mass which is not sorted by shape and not oriented relative to the backing plate surface. The described situation leads to the fact that a large number of grains does not participate in the cutting process, but on the contrary, have a negative impact on it, because the abrasive particles fall out of the bond, heat and deform the material to be ground without cutting it off. The approaches to improving the design of flexible backing grinding tools are discussed, the issues of their design and manufacture using the abrasive grains with controlled shape and orientation are revealed in the article. The data on the impact of the grain shape and orientation on the cutting ability of grinding belts are given.

The article is devoted to the research of strength properties of single abrasive grits of various shapes. The existing methods for determining the strength of abrasive materials are analyzed. Data are presented on the pattern of stresses arising in abrasive grits under various schemes of applying loads to them, obtained by computer simulation. The results of static strength tests of regular alumina grains by the method of uniaxial compression, as well as observations of the influence of the orientation and shape of abrasive grits on its impact strength, are presented.

No abstract