Endurance evaluation of metal structures containing cracks in mining shovel EKG-10

Metal structures of mining shovels in operation with blasted and non-blasted rocks experience cyclic loads which induce initiation and growth of cracks. Cracks grow mainly from faulted welding. Despite regular periodic control of welds (ultrasonic, X-ray, acoustic emission, etc.), cracks appear and grow, and can lead to accidents. Different conditions of mining and blasting and different behavior of metal structures induce different rates of crack propagation, which is impossible to assess on a hunch. It is necessary to know crack propagation parameters as function of ambient conditions. The studies of the effect of blasting before excavation show that the average rate of crack propagation in metal structures of mining shovels depends on the average size of fragments in rock piles after blasting and on the size of blocks in non-blasted rocks. The loading nature is different in these cases. The knowledge of crack propagation rates in metal structures of mining shovels allows prompt detection of failure moments in the shovels and enables well-timed repair of the machines.

Keywords: mining shovels, metal structures, cracks, stresses, defects, crack resistance, metal fatigue, rocks.
For citation:

Nasonov M. Yu., Iungmeister D. A., Do Duc Trong Endurance evaluation of metal structures containing cracks in mining shovel EKG-10. MIAB. Mining Inf. Anal. Bull. 2022;(11):67-79. [In Russ]. DOI: 10.25018/0236_1493_2022_11_0_67.

Issue number: 11
Year: 2022
Page number: 67-79
ISBN: 0236-1493
UDK: 621.879.
DOI: 10.25018/0236_1493_2022_11_0_67
Article receipt date: 28.03.2022
Date of review receipt: 16.09.2022
Date of the editorial board′s decision on the article′s publishing: 10.10.2022
About authors:

M.Yu. Nasonov1, Dr. Sci. (Eng.), Assistant Professor, Professor, e-mail: nasonov-m@spmi.ru, ORCID ID: 0000-0002-8529-1913,
D.A. Iungmeister1, Dr. Sci. (Eng.), Professor, e-mail: iungmeister@yandex.ru, ORCID ID: 0000-0001-7858-8340,
Do Duc Trong1, Graduate Student, e-mail: ductrongiemm@gmail.com, ORCID ID: 0000-0002-9105-9491,
1 Saint-Petersburg Mining University, 199106, Saint-Petersburg, Russia.


For contacts:

Do Duc Trong, e-mail: ductrongiemm@gmail.com.


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