Show/Hide Menu
Hide/Show Apps
Logout
Türkçe
Türkçe
Search
Search
Login
Login
OpenMETU
OpenMETU
About
About
Open Science Policy
Open Science Policy
Open Access Guideline
Open Access Guideline
Postgraduate Thesis Guideline
Postgraduate Thesis Guideline
Communities & Collections
Communities & Collections
Help
Help
Frequently Asked Questions
Frequently Asked Questions
Guides
Guides
Thesis submission
Thesis submission
MS without thesis term project submission
MS without thesis term project submission
Publication submission with DOI
Publication submission with DOI
Publication submission
Publication submission
Supporting Information
Supporting Information
General Information
General Information
Copyright, Embargo and License
Copyright, Embargo and License
Contact us
Contact us
Reliability analysis for two draglines in Tunçbilek lignite mine
Download
index.pdf
Date
2014
Author
Tuncay, Deniz
Metadata
Show full item record
Item Usage Stats
242
views
115
downloads
Cite This
In modern mining activities, high-capacity complex machines are used and their availability plays a big role on the mine productivity. Draglines are one of the high capacity mining machines which result in decrease in production in case of failure or unavailability. This study aims to determine the effects of different components of two draglines (PAGE 736 and MARION 7820) to their availability and operability by choosing adequate reliability models and conducting fault tree analyses. Reliability analysis was conducted using the failure data of the draglines provided by the Western Lignite Enterprises (GLİ) lignite mine in Tunçbilek/Kütahya to determine the change in the draglines’ reliability with respect to time. Reliability analyses were conducted by determining failure probability models. Fault tree analysis helped us understand the relations between the sub-units of each dragline with the help of a symbolic logic model. These analyses were also used to determine the critical elements which mostly affect the draglines reliability. Bucket units were distinguished to be more prone to failure for both draglines but when looked at components, components from other units were determined to have lower reliability, hence may need special attention. Also, the components with the highest reliability importance values were found to be changing with time when the draglines are operating. The results of this study should be considered when preparing a maintenance plan to concentrate on the components that have higher effect on the dragline’s reliability.
Subject Keywords
Draglines.
,
Excavating machinery.
,
Buckets (Excavating machinery).
,
Reliability (Engineering).
URI
http://etd.lib.metu.edu.tr/upload/12617853/index.pdf
https://hdl.handle.net/11511/24033
Collections
Graduate School of Natural and Applied Sciences, Thesis
Suggestions
OpenMETU
Core
Review of Graphical Methods Utilized in System Reliability Assessment
TUNCAY, DENİZ; Demirel, Nuray (2015-04-17)
In modern mining activities, mine productivity highly relies on the availability of high capacity machines. Reliability assessment of these machines has significant impact on understanding the failure behaviors, thus determining maintenance policies accordingly. Reliability analysis of complex systems, such as mining machinery, requires knowledge about failure behavior of their components for more accurate results. In order to combine the failure information of system components to analyze system reliabilit...
Reliability-based maintenance optimization of walking draglines
Gölbaşı, Onur; Demirel, Nuray; Department of Mining Engineering (2015)
Dragline is an earthmover extensively utilized in open cast coal mines for overburden stripping activities. Since the machinery breakdowns may induce high amount of production losses, draglines are required to be operated with high availability. In this sense, effective maintenance policies are essential to improve longevity of dragline component and sustainability of operations. In this research study, it is aimed to develop a reliability-based maintenance optimization models for two walking draglines, Pag...
Reliability analysis of dragline using fault tree analysis
Deniz, Tuncay; Demirel, Nuray (2017-06-01)
Draglines, as massive and expensive stripping machines, are highly utilized in open cast mining to remove overburden. Reliabilities and availabilities of draglines play a critical role to sustain the continuity of overburden stripping and, hence, coal productions. Thorough understanding of the system and its components is required in order to accomplish high levels of availability and it can be achieved with an in depth reliability analysis. This study presents component-based reliability analysis of a walk...
Reliability Modeling of Draglines for Availability Estimation and Maintenance Planning
Demirel, Nuray (2009-11-09)
Walking draglines are the dominant production equipment for overburden excavation in surface strip mining operations. Given that the average unit cost of production by dragline is US$ 3.5/m3 for coal, the one percent increase in the machine productivity can provide significant benefits to the industry. Effective use of draglines requires a thorough knowledge of machine productivity, efficiency, and reliability. Production engineers must be guided by appropriate strategies to preserve the structural and ope...
Development of a computer-aided dragline selection program
Akhundov, Sayid; Demirel, Nuray; Department of Mining Engineering (2017)
Selection of appropriate machine and equipment is one of the most critical tasks required in surface mining. Since draglines are massive and expensive machines, their selection is of paramount concern to mining engineers and decision makers. The selection of appropriate dragline model requires simultaneous consideration of various parameters, such as geological properties of overburden material, stripping method, available fund and technology. Therefore, this is a complex and time-consuming process. In this...
Citation Formats
IEEE
ACM
APA
CHICAGO
MLA
BibTeX
D. Tuncay, “Reliability analysis for two draglines in Tunçbilek lignite mine,” M.S. - Master of Science, Middle East Technical University, 2014.