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Results of the studies of the impact interaction of lumpy rock mass with lining effective surface of machines

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Category: Geotechnical and mining mechanical engineering, machine building

Last Updated on 28 July 2014

Published on 13 August 2013

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Authors:

V.P. Nadutyi, Dr. Sci. (Tech.), Professor, N.S. Poliakov Institute of Geotechnical Mechanics of National Academy of Science of Ukraine, Head of Department, Dnepropetrovsk, Ukraine

V.V. Sukharyev, Cand. Sci. (Tech.), N.S. Poliakov Institute of Geotechnical Mechanics of National Academy of Science of Ukraine, Research Fellow, Dnepropetrovsk, Ukraine

D.V. Beliushin, State Higher Educational Institution “National Mining University”, Postgraduate Student, Dnepropetrovsk, Ukraine

Abstract:

Purpose. Defining the dependencies of tensions in the metal surface of effective unit of protective machine on the parameters of the rubber lining, conditions of the joint impact and identification of the main factors that determine the efficiency of its use.

Methodology. The experiments were performed on a laboratory bench, which models the box in the ratio of 1:4. Measurement of tension in metal at impact load is determined by the strain gauge method with a standard recording devices. Number of experiments is enough to obtain results with a confidence probability of 0.95.

Findings. It has beenfound that the factors that significantly affect the reduction of tension in protected by rubber lining surface of machine at impact loads are the thickness and hardness of the rubber layer, area and depth of the joint impact contact and its time. Rubber lining reduces tension on protected surface at the impact by 6–10 times in comparison with a hard impact to the exposed surface, due to increasing of the contact area of joint impact by 3–5 times and a contact time of the collision by 3–4 times.

Originality. It has been set the linear character and numerical values of dependence of the tension in the box, the contact time and the depth of the joint impact on the thickness of the rubber layer of lining and rubber hardness. A physical explanation of the tension reducing factor in the metal structure at its protection with lining by increasing the contact area and the time of impact.

Practical value. The obtained data allow to make a choice of parameters of a lining surface, particularly operating thickness of a rubber layer of lining is selected by the depth of the contact for reasons of saving its integrity, and other factors define protective properties of lining and expediency of its application.

References:

1. Потураев В.Н. Вибрационная техника и технологии в энергоемких производствах / Потураев В.Н., Франчук В.П., Надутый В.П. : монография / Национальная горная академия Украины. – Днепропетровск, 2002. – 230 с.

Poturaev, V.N., Franchuk, V.P. and Nadutyi, V.P. (2002), Vibratsionnaya tekhnika i tekhnologii v energoyemkikh proizvodstvakh [Vibration technics and technologies in power-consuming production], Monograph, National Mining Academy of Ukraine, Dnepropetrovsk.

2. Рабочие поверхности и футеровки барабанных и вибрационных мельниц: монография / Франчук В.П., Настоящий В.А., Маркелов А.Е., Чижик Е.Ф. – Кременчуг : изд-во Щербаковых А.В., 2008. – 384 с.

Franchuk, V.P., Nastoyashchii, V.A., Markelov, A.Ye. and Chizhyk Ye.F, (2008), Rabochiye poverkhnosti i futerovki barabannykh i vibratsionnukh melnits [Effective surfaces and linings of drum and vibratory mills], Monograph, Izdatelstvo Shcherbakovykh, A.V., Kremenchug.

3. Надутый В.П. Анализ ударного взаимодействия кусковой горной массы с рабочими поверхностями машин и оборудования / В.П. Надутый, В.В. Сухарев, Д.В. Белюшин // Геотехническая механика : межвед. сб. науч. тр. / ИГТМ НАН Украины. – 2012. – Вып. 103. – С. 152–159.

Nadutyi, V.P., Sukharev, V.V. and Beliushkin, D.V. (2012), “The analysis of impact interaction of the lumpy rock mass with effective surfaces of machines and equipment”, Geotekhnicheskaya mekhanika, Interdepartmental papers of IGTM NAS of Ukraine, issue 103, p. 152-159..

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