Authors: A.A. Khoreshok, L.E. Mametyev, A.M. Tsekhin, A.Yu. Borisov

Title of the article: Prospects of disk tools using on executive bodies of mining machines

Year: 2018, Issue: 1, Pages: 64-80

Branch of knowledge: MINING AND GEOTECHNICAL ENGINEERING

Index UDK: 622.232.83.054.52

DOI: 10.26730/2618-7434-2018-1-64-80

Abstract: Research of disk tools of the executive bodies of mining machines are ac-tual. The aim of the research is to substantiate the rational geometric and kinematic parameters of disk tools, as well as the schemes of their arrange-ment on the executive body to ensure efficient use of the energy that sup-plied to them. The analysis of the results of production tests of disk tools on the executive bodies of cutter-loaders of selective action made it possible to justify the rational parameters of the construction of conical and biconical disks with continuous and intermittent cutting edges. The parameters of double-turn schemes of a set of disks, which are fixed on trihedral prisms of the execu-tive bodies of tunneling combines, are established. The models of mechanical influence of conical and biconical disk tools on the destroyed rock array are created. It is shown that when discs with both a conical and a biconical shape of the blade are rolling along the face, the feeding force plays the main role in the formation of the load. It is estab-lished that volumetric destruction of the rock by a disk tool with the least specific energy expenditure is ensured with semi-blocked and repeatedly-blocked modes. The best results were obtained when modeling biconical disk tools. The energy efficiency of the mechanical action of the disk tool of the min-ing machine executive body on the destroyed rock array is determined using the phenomenon of mobile main cracks. The concept of efficiency coeffi-cient of low-cycle and volumetric fracture of a disk instrument of various brittleness is introduced. It is established that the load formed on disk tools is not only a function of the physical and mechanical properties of rocks, but also a function of the parameters of destruction determined by the kin-ematics of work and the design parameters of the executive body. The results of production tests of experimental samples of the executive bodies of tunneling and cleaning combines allowed to obtain recommenda-tions, which are the basis for designing the disk tool.

Key words: cutter-loader execu-tive body disk tool collapsible massif low-cycle loading effi-ciency factor specific energy consumption

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