@article { author = {Chakeri, Hamid and Aghababaei, Hamid and Darbor, Mohammad and Mostafaei Daneshmand, Hossein}, title = {Evaluation of reliability, availability and maintainability of back-up locomotives in earth pressure balance tunnel boring machine (EPB-TBM): A case study: Tabriz Metro Line 1}, journal = {Journal of Mining Engineering}, volume = {17}, number = {57}, pages = {68-88}, year = {2022}, publisher = {Iranian Society of Mining Engineering (IRSME)}, issn = {1735-7616}, eissn = {2676-4482}, doi = {10.22034/ijme.2022.544103.1895}, abstract = {Back-up locomotives are locomotives responsible for mechanized excavation of tunnels, transport of prefabricated concrete parts, slurry poured behind prefabricated concrete parts and foams, as well as materials excavated from the tunnel. In this study, the reliability, availability and maintainability of back-up locomotives of EPB-TBM machines of Tabriz metro line 1 have been investigated. Initially, locomotives were divided into four main systems, including pneumatic, electrical, hydraulic and motor. Each of these systems, in turn, consisted of subsystems. Then, the failure data of 5 locomotives were collected; after combining the data, about 30,000 hours of data were obtained from the failures. Examination of the data showed that there was a failure in ten subsystems and these subsystems were critical. Pareto analyzes were then performed to examine the percentage of failures, costs, and repair times. For each subsystem, the most appropriate failure distribution function was fitted and the reliability of the subsystems and systems was determined. Due to the lack of a trend in all failure data and the prevalence of independent and equal conditions for the data, reliability and availability were matched. Also, using the average repair times, the maintainability of the components was determined. The results indicated the importance of reliability for pneumatic, electrical, motor and hydraulic systems, respectively. Meanwhile, the pneumatic system is very different from the other three systems, and over time, this difference becomes even greater. Another very important result is the loss of reliability of almost all subsystems to below 50% after 500 hours of operation. In the maintenance section, the results also showed that all failure times were higher than 400 hours. In terms of repair times, a significant part was related to the hydraulic system, followed by the engine and pneumatic system with the most repair time.}, keywords = {mechanized excavation,Support Locomotive,Reliability,system,Subsystems}, title_fa = {بررسی قابلیت اطمینان، دسترسی و تعمیرپذیری لوکوموتیوهای پشتیبان ماشین تونلزنی سپری (EPB -TBM) خط یک متروی تبریز}, abstract_fa = {مصطفایی دانشمند، ح؛ 1399؛ «بررسی قابلیت اطمینان لوکوموتیو پشتیبان در دستگاه حفاری تمام مقطع تونل (TBM) ، مطالعه موردی‌: خط یک متروی تبریز»؛ پایان‌نامه کارشناسی ارشد؛ دانشکده مهندسی معدن؛ دانشگاه صنعتی سهند تبریز.## Ascher, H; Feingold, H; 1984; “Repairable system reliability”, New York, Dekker.## Barabady, J; Kumar, U; 2008; “Reliability analysis of mining equipment: A case study of a crushing plant at Jajarm Bauxite Mine in Iran”, Reliability Engineering & System Safety, 93(4), 647-653. ## Chulho, B; Taeyoon, K; Youngtak, S; Kyjun, P; Jongdeok, J; 2009; “A study on reliability centered maintenance planning of a standard electric motor unit subsystem using computational techniques”, Journal of Mechanical Science and Technology, 23, 1157-1168. ## Jing, L; Julio, P; Matthias, A; 2015; “Reliability analysis for preventive maintenance based on classical and Bayesian semi-parametric degradation approaches using locomotive wheel-sets as a case study”, Reliability Engineering, 134, 143-156. ## Kumar, U; Klefsjo, B; 1992; “Reliability analysis of hydraulic system of LHD machine using the power low process model”, Reliability Engineering & System Safety. ## Liu, P; Wu, Y; Huang, Q; 2005; “Preliminary leakage reliability analysis of DFLL-TBM based on a combinational approach”, Fusion Engineering and Design, 75, 1127-1133. ## Myrefelt, S; 2004; “The reliability and availability of heating, ventilation and air conditioning systems”, 36(10), 1035-1048. ## Nachlas, J; 2005; “Reliability engineering”, Taylor & Francis. ## Kumar, U; Klefsjo, B; Granholm, S; 1989; “Reliability investigation for a fleet of load haul dump machines in a Swedish mine”, Reliab Eng Syst Saf, 26(4), 341-361. ## Vagenas, N; Runciman, N; Clement, S.R; 1997; “A methodology for maintenance analysis of mining equipment”, Int J Surface Min Reclamat Environ, 11, 33-40. ## Sharma, R.K; Sharma, P; 2012; “Integrated framework to optimize RAM and cost decisions in a process plant”, Industries, 25(6), 883-904. ## Lashgari, A; Sayadi, A.R; 2013; “Statistical approach to determination of overhaul and maintenance cost of loading equipment in surface mining”, International Journal of Mining Science and Technology, 23(3), 441-446. ## Moniri Morad, A; Pourgol-Mohammad, M; Sattarvand, J; 2014; “Application of reliability-centered maintenance for productivity improvement of open pit mining equipment: case study of Sungun copper mine”, Journal of Central South University, 21, 2372-2382. ## Sinha, R.S; Mukhopadhyay, A.K; 2015; “Reliability centered maintenance of cone crusher- a case study”, Int J Syst Assurance Eng Manag, 6(1), 32-35. ## Lin, J; Pulido, J; Asplund, M; 2015; “Reliability analysis for preventive maintenance based on classical and Bayesian semi-parametric degradation approaches using locomotive wheel-sets as a case study” Reliability Engineering & System Safety, 134, 143-156. ## Mohammadi, M; Rai, P; Gupta, S; 2016; “Improving productivity of dragline through enhancement of reliability inherent availability and maintainability”, Acta Montanistica Slovaca, 21(1), 1-8. ## Nouri Qarahasanlou, A; Khalokakaie, R; Ataei, M; Ghodrati, B; 2016; “Operating environment-based availability importance measures for mining equipment (case study: Sungun copper mine)”, Journal of Failure Analysis and Prevention, 17, 56-67. ## Balaraju, J; Govinda, R.M; Murthy, C.S.N; 2018; “Estimation of Reliability-based maintenance time intervals of Load Haul Dumper in an underground coal mine”, Int J Min Environ, 9(3), 761-770. ## Balaraju, J; Govinda Raj, M; Murthy, Ch.S.N; 2020; “Performance evaluation of underground mining machinery: a case study”, Journal of Failure Analysis and Prevention, 20, 1726-1737. ## Angeles, E; Kumral, M; 2020; “Optimal Inspection and Preventive Maintenance Scheduling of Mining Equipment”, Journal of Failure Analysis and Prevention, 20, 1408-1416. ## Leite, M; Costa, M.A; Alves, T; Infante, V; Andrade, A.R; 2022; “Reliability and availability assessment of railway locomotive bogies under correlated failures”, Engineering Failure Analysis,135. ##}, keywords_fa = {حفاری مکانیزه,لوکوموتیو پشتیبان,قابلیت اطمینان,سیستم,زیرسیستم ها}, url = {https://ijme.iranjournals.ir/article_696612.html}, eprint = {https://ijme.iranjournals.ir/article_696612_6b43a371c92d17936a8737bd1e00dbab.pdf} }