Substantination of carbon fiber as an innovative materials for fistening of mining workings of coal mines

Abstract

Purpose. To analyze composite materials and prospects of their use as fastening materials for mining of coal mines.Perform a comparative analysis of the physical and mechanical properties of the innovative material carbon fiber and metallic materials, as well as compare their features. To determine the possibility of using carbon fiber as a fastening material for mining of coal mines. Research methodology. The generalization of physical and mechanical properties of carbon fiber on the basis of its analysis is performed. The features of mechanical properties of carbon fiber, steel and aluminum are compared, which showed that this composite material has the best physical and mechanical properties and it is expedient to use it in the fastening elements of mine workings. Research results. The areas of use of composite materials in industry are analyzed and generalized, and it is concluded that it is better to use carbon fiber as a fastening material for coal mine workings. A comparative analysis of the physical and mechanical properties of carbon fiber and steel is performed, which shows that this composite material has identical (and sometimes even better) properties as metallic materials. The advantages and disadvantages of carbon fiber as a fastening material for mining of coal mines are estimated. It is specified that the restraining factor, today, is the cost of carbon fiber, and later their price will decrease and demand will increase. It is concluded that when using this composite material in the fasteners of mine workings, it is possible to increase the pace of their implementation, reduce the complexity of the work performed and improve working conditions while facilitating the design. Scientific novelty. It is established that carbon fiber as a composite material can be used in the fastening elements of the preparatory workings of coal mines. Practical value. According to the results of the analysis, it is established that carbon plastics can be used in the fastening elements of mine workings, which will promote the development of underground coal mining.

Results of research on the stability of mine workings, fixed by arched supports made of composite materials, in the conditions of the Pokrovske Mine Administration

“…In the study [18], the authors pay considerable attention to the issue of innovative prospects for underground mining of coal deposits. In the studies [19,20], the use of a composite material of carbon fiber-reinforced plastic (CFRP) is substantiated as an innovative material in the fastening elements for supporting mine workings. The substantiation has proven that carbon fibers have no worse physical-mechanical properties than metal ones.…”

Substantiating arched support made of composite materials (carbon fiber-reinforced plastic) for mine workings in coal mines

“…However, as indicated by research on the physical-mechanical properties [14], [15], it is better to use carbon fiber-reinforced plastic (CFRP) as a fastening material for the coal-mining industry, since it has high bending strength (1190 MPa) and a low density (1500 kg/m 3 ), as well as ultimate tensile strength (1400 MPa), etc. An analylis of the physical-mechanical properties of composite materials [16] confrims that CFRP is light weight (5 times ligher than metal), resistant to mechanical stresses, flexible, and can be made of any geometric shape. One of the problems for using the carbon fiber-reinforced plastic [17], [18] is its high cost.…”