Abstract
Reliability-based maintenance policies allow qualitative and quantitative evaluation of system downtimes via revealing main causes of breakdowns and discussing required preventive activities against failures. Application of preventive maintenance is especially important for mining machineries since production is highly affected from machinery breakdowns. Overburden stripping operations are one of the integral parts in surface coal mine productions. Draglines are extensively utilized in overburden stripping operations and they achieve earthmoving activities with bucket capacities up to 168 m3. The massive structure and operational severity of these machines increase the importance of performance awareness for individual working components. Research on draglines is rarely observed in the literature and maintenance studies for these earthmovers have been generally ignored. On this basis, this paper offered a comprehensive reliability assessment for two draglines currently operating in the Tunçbilek coal mine and discussed preventive replacement for wear-out components of the draglines considering cost factors.
Highlights
Mining is a machine-intensive sector where different systems with different operational tasks are employed at production areas
This study considers the Kijima-II model in estimation of GRP parameters since maintenance provides a general recovery on dragline components, more or less
This study study extensively extensively used used reliability reliability assessment assessment and and age-replacement age-replacement methods methods to to investigate
Summary
Mining is a machine-intensive sector where different systems with different operational tasks are employed at production areas. Reliability helps the development of various proactive activities, performance is critically important to evaluate dragline reliabilities and to reveal reasons such as preventive component replacement, capital equipment replacement, andunderlying optimization of for downtimes On this basis, the reliability concept offers a probabilistic tool to characterize systems maintenance issues such as inspection interval, crew capacity, and spare part policy. Much research been carried out on the reliability and maintenance appearing in dragline operations and has how/when to apply preventive maintenance for these of mining machineries, such as load-haul-dump [5,6,7,8,9,10,11,12,13,14], shovel [15,16,17,18,19], longwall shearer [20,21,22,23], drilling components have been ignored in the literature On this basis, this paper presents an in-depth equipment [24,25,26,27,28], and draglinesreplacement [29,30,31].
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