MINING EQUIPMENT

Original Paper

UDC 622–1:[2:331.101.1] © Velikanov V.S.1,2, Grishin I.A.3 , Lukashuk O.A.1 , Degodya E.Yu.3 , Telminov N.S.1 , 2024

ISSN 0041-5790 (Print) • ISSN 2412-8333 (Online) • Ugol’ – Russian Coal Journal, 2024, № 12, pp. 103-107

DOI: http://dx.doi.org/10.18796/0041-5790-2024-12-103-107

Title

STUDY OF THE STRESS-STRAIN STATE OF THE WORKING BODY OF A QUARRY EXCAVATOR UNDER DYNAMIC LOADS FROM THE GRANULOMETRIC COMPOSITION OF ROCKS

Authors

S.O. Markov, D.M. Dubinkin, A.A. Khoreshok, M.A. Tyulenev

1 Ural Federal University named after the first President of Russia B.N. Yeltsin, Yekaterinburg, 620002, Russian Federation 2 Ural State Mining University, Yekaterinburg, 620144, Russian Federation 3 Nosov Magnitogorsk State Technical University, Magnitogorsk, 455000, Russian Federation  e-mail: v.s.velikanov@urfu.ru

Authors Information

Velikanov V.S. – Doctor of Engineering Sciences, Professor of the Department of lifting and Transport Machines and Robots, Ural Federal University named after the first President of Russia B.N. Yeltsin, Yekaterinburg, 620002, Russian Federation, Professor of the ACT Department, Ural State Mining University, Yekaterinburg, 620144, Russian Federation, e-mail: v.s.velikanov@urfu.ru

Grishin I.A. – Ph (Engineering), Associate Professor, Head of the Department of Geology, Mining Surveying and Mineral Resources Enrichment, Nosov Magnitogorsk Technical University, Magnitogorsk, 455000 Russian Federation, e-mail: igorgri@mail.ru

Lukashuk O.A. – Ph (Engineering), Associate Professor, Head of the Department of lifting and Transport Machines and Robots, Ural Federal University named after the first President of Russia B.N. Yeltsin, Yekaterinburg, 620002 Russian federation, e-mail: o.a.lukashuk@urfu.ru

Degodya E.Yu. – Ph (Engineering), Associate Professor, Associate Professor of the Department of Geology, Mining Surveying and Mineral Resources Enrichment, Nosov Magnitogorsk State Mechanical University, Magnitogorsk, 455000, Russian Federation, e-mail: magur@mail.ru

Telminov N.S. – Student, Ural Federal University named after the first President of Russia B.N. Yeltsin, Yekaterinburg, 620002, Russian Federation, e-mail: Nikita.elminov@urfu.me

Abstract

The current stage of development of the global and domestic mining industry is determined by a number of key factors in achieving high technical and economic indicators, namely, a comprehensive solution to theoretical and applied problems in the mining sector. The development of mining equipment poses new challenges in the field of research into the performance of machines and their elements. Increasing their reliability and durability, being the most important factor determining the growth of competitiveness of products, is associated with a reliable definition of “dangerous” places of the design. Analysis of statistical data on the operation of mining and transport equipment at mining enterprises of the Russian Federation and scientific and technical literature has determined that there are no significant advances in reducing the number of downtimes of the main process equipment. The majority of failures of quarry excavators are classified as sudden, caused mainly by the influence of operating conditions and modes. It has been established that the most unreliable ECG units, from the point of view of failure-free operation, are elements of the working equipment. Reduction of failures and, accordingly, downtime can be achieved, in addition to updating and optimizing the fleet of process equipment, by introducing modern approaches at mining enterprises that minimize the percentage of failures of mining and transport equipment. Reliability of mining equipment is a significant problem, so research aimed at further studying the issues of predicting breakdowns and failures are relevant and in demand. The paper considers the effect of the granulometric composition of blasted rocks on the actual stress values in the bucket of a quarry excavator during excavation of rock mass at different stages of the excavation cycle. The distribution of fractions in the rock mass heaps was established and a numerical analysis was carried out, which made it possible to establish the relationship between the bucket loading modes and the lumpiness of rocks with different angles of its penetration into the heap.

Keywords

Excavator, loader, hauler, equipment, failure, element, modeling, stress-strain state, bucket, loads.

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Acknowledgements

This work was financially supported by the Ministry of Science and Higher Education of the Russian Federation (Project Z-2023–0008).

For citation

Velikanov V.S., Grishin I.A., Lukashuk O.A., Degodya E.Yu., Telminov N.S. Study of the stress-strain state of the working body of a quarry excavator under dynamic loads from the granulometric composition of rocks. Ugol’. 2024;(12):103-107. (In Russ.). DOI: 10.18796/0041-5790-2024-12-103-107.

Paper info

Received September 24,

2024 Reviewed November 15, 2024

Accepted November 28, 2024