The Mechatronic System of Energy Saving Rock Destruction
Background. The article considers the possibility of reducing the energy intensity of rock destruction due to the combined artificial fracturing of the face in addition to the existing natural fracture. The study was carried out in accordance with the “National program for the development of the mineral resource base of Ukraine for the period until 2030” (Law of Ukraine of April 21, 2011 No. 3268-VI).
Objective. The aim of the paper is the energy intensity reduction of rock destruction by energy-saving mechatronic systems.
Methods. The following methods were used: the induction method that determined the general shortcomings of existing theories of rock destruction; the method of Giordano-Gauss made it possible to determine the dominant conditions for the destruction of crystalline structures of limestones, gneisses, marls, sandstones, granites; the method of synthesis made it possible to distinguish the energy criterion in a system of destruction by an external energy flow; the method of theoretical modeling made it possible to determine the dependences of the modulus of elasticity of the first kind and the specific energy intensity on technological parameters, the energy flow, and the parameters of the crystalline rock structures; the experimental method has made it possible to confirm the analytical dependences of the elastic modulus of the first kind and the specific energy intensity on the parameters of the external energy flow and the parameters of the crystal structures of the rock massif.
Results. It is established that the main parameters that affect the process of solid body destruction are characteristics and specific surface energy. An experimental verification of the proposed model showed that when the cutting speed is increased from 4 to 12 m/s, the specific surface energy decreases from 6 to 0.3 J/m2 for gneiss, from 0.69 to 0.03 J/m2 for marl, from 0.41 to 0.02 J/m2 for granite. With the increase in the distance between the cutting edges of the working tool from 0.01 to 0.08 m, the specific surface energy decreased from 0.8 to 0.5 J/m2.Conclusions. A mechatronic system of rotational magnetic-hydrocavitation rock drilling has been created. The system passed industrial tests on the quartz mine of the Tokavachevsky ore mining and processing enterprise. The energy intensity of quartzite destruction has been reduced from 95.0 to 87.5 kWh/m3 (8%), the annual economic effect from the introduction is 27000 UAH. Payback period is 2 months.
Full Text:PDF (Українська)
A.A. Griffith, “The phenomena of rupture and flow in solids”, Philosoph. Trans. Roy. Soc. London, Ser. A, vol. 221, pp. 163–198,1921.
S.N. Zhurkov et al., “On the prediction of rock destruction”, Izv. AN SSSR, Ser. Fizika Zemli, no. 6, pp. 2–7, 1977.
I.V. Obreimov and Ie.S. Terekhov, “On the strength of mica for breaking along the cleavage plane”, in Studies on Experimental and Theoretical Physics (in Memory of O. Landsberg). Moscow, SU: AN SSSR Publ.,1959, pp. 36–84.
A.A. Griffith, “The phenomena of rupture and flow in solids”, Phil. Trans. Roy. Soc., vol. A221, pp. 49–163, 1920.
C. Zener, Fracturing in Metals. Cleveland: ASM, 1998.
A.N. Stroh, Advances in Physics, vol. 6. New York: AIME, 1997, pp. 214–382.
A.H. Cotrell, Structural Processes in Greep. London, UK: Iron and Steel Inst, 1991.
J.J. Gilman, Physics Process Transports, vol. 212. New York: AIME, 1988, pp. 364–487.
E. Orovan, Dislocations in Metals. New York: AIME, 1994, pp. 23–51.
N.J. Petch, Iron and Steel Institute. Iron-Carbon Complexes. London: PSF, 1993, pp. 45–184.
G.G. Karkashadze, Mechanical Destruction of Rocks. Moscow, Russia: Moscow State Mining University Publ., 2004.
A.I. Bondarets et al., “Ultrasonic intensification of rock destruction”, Naukovi Praci DonNTU, no. 18, pp. 131–137, 2010.
I.N. Ermolov and Yu. A. Ostanin, Methods and Means of Nondestructive Testing. Moscow, SU: Higher School, 1988.
T.T Garipov, “Modeling of the hydraulic fracturing process in a poroelastic medium”, Matematicheskoye Modelirovaniye, vol. 18, no. 6, pp. 53–69, 2006.
J.J. Gilliman, “Dislocation dynamics and the response of material to impact”, Appl. Mech. Rev., vol. 21, no. 8, pp. 767–783, 1968.
B.M. Smirnov, “Scaling in atomic and molecular physics”, Uspekhi Fizicheskikh Nauk, vol. 171, no. 12, pp. 1291–1315, 2001.
I.N. Stranskiy amd R. Kaishev, “To the theory of crystal growth and the formation of crystalline embryos”, Uspekhi Fizicheskik Hnauk, vol. 21, no. 4, pp. 408–465, 1939.
M.E. Bobrova and A.S. Perezhogin, “Modeling of the field of deformations and zones of dilation in an elastic half-space with a combination of double forces”, Vestnik KRAUNC, Fiz.-Mat. Nauki, no. 1, pp. 31–36, 2011.
M.P. Shaskolskaya, Crystallography. Moscow, SU: Higher School, 1984, pp. 248–274.
O.M. Terentiev, “Taking into account the strength of molecular bonds of rocks in the choice of working bodies for its destruction”, Visnyk NTUU KPI. Ser. Ghirnyctvo, no. 19. pp. 154–161, 2010.
V.R. Regel et al., “The kinetic nature of the strength of solids”, Uspekhi Fizicheskikh Nauk, vol. 106, no. 2, pp. 193–228, 1972.
A.F. Ioffe et al., “Deformation and strength of crystals”, Zhurnal Russkogo Fiziko-Khimicheskogo Obshchestva, no. 22, pp. 286–293,1924.
O.M. Terentiev, “Mechanism of creating the prefracture zone of rock formations with magnetic and hydrocavitation load”, Metallurgical and Mining Industry, no. 4, pp. 353–355, 2015.
O.M. Terentiev, “Physical and technical bases of mining of minerals with energy-saving destruction of molecular bonds of rocks”, Dr.Sci. dissertation, Kyiv Polytechnic Institute, Kyiv, Ukraine, 2008.
O.M. Terentiev and A.Y. Kleshchov, “Synthesis of the conditions for the choice of energy-saving technology of destruction”, in Proc. Int. Conf. “Sustainable Energy Development: Current Trends, Technologies and Solutions-2014”, Kyiv, Ukraine, 2014, pp. 51–52.
O.M. Terentiev and P.A. Gontar, “Reducing energy intensity of rock destruction under the influence of combined loads”, in Proc. All-Ukrainian Sci. Tech. Conf. “Innovative Technologies for the Development of Mineral Deposit”, Donetsk, Ukraine, 2013, pp. 109–113.
Yu.I. Voitenko and A.M. Shukurov, “On energy intensity of rock destruction and ways of its reduction”, Visnyk NTUU KPI. Ser. Ghirnyctvo, no. 31, pp. 11–25, 2016.
GOST Style Citations
Copyright (c) 2018 Igor Sikorsky Kyiv Polytechnic Institute
This work is licensed under a Creative Commons Attribution 4.0 International License.