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Identifying the mixed effects of unobserved and observed risk factors on the reliability of mining hauling system
Department of Mining Engineering, Faculty of Engineering, University of Tarbiat Modares, Tehran, Iran.
Department of Mining Engineering, Faculty of Engineering, University of Tarbiat Modares, Tehran, Iran.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Operation, Maintenance and Acoustics.ORCID iD: 0000-0003-1377-8180
2021 (English)In: International Journal of Systems Assurance Engineering and Management, ISSN 0975-6809, E-ISSN 0976-4348, Vol. 12, no 2, p. 281-289Article in journal (Refereed) Published
Abstract [en]

Reliability is widely used as a performance indicator of mining equipment to achieve a cost-effective maintenance plan. Reliability is a function of time as well as environmental and operational factors. Applying an adequate model by taking into account the mentioned factors is vital to ensure an accurate estimation of reliability characteristics. The aim of this study is to investigate the application of mixed frailty model to describe both observed and unobserved heterogeneity in reliability analysis of mining equipment. The capability of the model is assessed using field data from a fleet of dump trucks in an open-pit mine. The results indicate that the proposed model is superior to the traditional Cox model when data are heterogeneous. The results also show that the operator's skill and road conditions have a significant effect on the reliability of dump trucks.

Place, publisher, year, edition, pages
Springer, 2021. Vol. 12, no 2, p. 281-289
Keywords [en]
Reliability, Hazard, Frailty, Dump truck, Mixed effects model, Unobserved risk factors
National Category
Other Civil Engineering
Research subject
Operation and Maintenance
Identifiers
URN: urn:nbn:se:ltu:diva-83490DOI: 10.1007/s13198-021-01073-3ISI: 000625598500002Scopus ID: 2-s2.0-85102291916OAI: oai:DiVA.org:ltu-83490DiVA, id: diva2:1542017
Note

Validerad;2021;Nivå 2;2021-04-06 (alebob)

Available from: 2021-04-06 Created: 2021-04-06 Last updated: 2021-05-26Bibliographically approved

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Ghodrati, Behzad

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