Larionov G .I., Kiriya R.V. About influence of design tubular-conveyor parameters on the cross section stability at assymetric loading

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Parent Category: Geo-Technical Mechanics, 2018

Category: Geo-Technical Mechanics, 2018, Issue 139

Geoteh. meh. 2018, 139, 3-13

DOI: https://doi.org/10.15407/geotm2018.02.003

ABOUT INFLUENCE OF DESIGN TUBULAR-CONVEYOR PARAMETERS ON THE CROSS SECTION STABILITY AT ASSYMETRIC LOADING

¹Larionov G.I., ¹KiriyaR.V.

¹Institute of Geotechnical Mechanics named by N. Poljakov of National Academy of Sciences of Ukraine

UDC622.647.05:621.867.4-1

Language: Ukrainian

Abstract.

According to practical experience, main drawback of tubular conveyors (TC) when they operate in the coal mine is loss of the belt circular cross-section stability, which results not only in the freight pouring-out but also in abnormal interaction with the TC roller carriages, longitudinal cuts in the belts and, as consequence, impossibility of their further usage.  Absence of mathematical model of process of cross-section stability losing did not allow investigating the problem properly due to complexity of initial elastic shell equations.

As a result of conducted researches the mathematical model of the tensely-deformed  state of the TС  conveyer belt with a load at asymmetrical  location  in the transversal section is developed; on the basis of the developed model the size of twisting of normal section of  conveyer belt is certain; moment of twisting of normal section of conveyer belt from forces of weight of load and deformation of conveyer belt  and moment of twisting of conveyer belt from friction frorces of  conveyor belt at the conveyer guide; linear dependence of moment of twisting, conditioned by force of  weight and load deformation  from the step of placing of idlers and cube dependence  from the radius of convolute conveyor belt, and also straight dependence on specific gravity of the transported load and coefficient of friction of load at a conveyer belt, is set. At it than more anymore degree of filling by the load of  conveyer belt, that the size of moment of twisting of conveyer belt, conditioned by forces of weight of load and deformation, less; cube dependence of moment of twisting is set by  forces of friction of  conveyor belts at the rollers of  idlers, from the radius of tubular conveyer belt, and linear dependence from distance between idlers, coefficient of friction of  conveyer belts at rollers and specific gravity of load. Thus, than anymore coefficient of internal friction of load and degree of filling by the load of  conveyor belt, the anymore moment of twisting;  determinated  criterion of firmness of transversal section of the TC conveyer belt on conditions of its motion on idlers.

Keywords: tubular beltconveyor, stress-strain state, general elastic shell equations, simplification, analytical solving, torsion parameter, stability loss.

References:

1. Tsigler, M. and Busse, X. (1992), “Underground exploitation of conveyer with the displaced ribbon on the mine «Luizental»”, Gliukauf, no. 3, pp. 27–33.

2. Timoshenko, S. P. and D. Gudier, S. (1975), Teoriya uprugosti [Elasticity], Nauka, Moscow, SU.

3. Kiriya, R.V. and Larionov, M. G. (2016), “Mathematic modeling of linear belt item stress strain state tubular conveyor”, Geo-Technical Mechanics, no. 131, pp. 158–164.

4. Zenkov, R.L. (1984), Mekhanikanasypnykhgruzov [Soil mechanics], Mashinosrtoenie, Moscow, SU.

5. Larionov, G. I. (2011), Otsiniuvannia konstruktyvnykh parametriv ankernogo kriplennia [The anchor design parameter evaluating], The National Metallurgical Academy of Ukraine, Dnepropetrovsk, Ukraine.

About the authors:

Larionov Grigoriy Ivanovich, Doctor of Technical Sciences (Ph.D), Senior Researcher, Senior Researcher in Department of Mining Transport Physics and Mechanics, Institute of Geotechnical Mechanics named by N. Poljakov of National Academy of Sciences of Ukraine  (IGTM NASU), Dnipro, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.

Kiriya Ruslan Vissarionovich, Candidate of Technical Sciences (Ph.D), Senior Researcher, Head of the Department of Mining Transport Physics and Mechanics, Institute of Geotechnical Mechanics named by N. Poljakov of National Academy of Sciences of Ukraine  (IGTM NASU), Dnipro, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.

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