Shahrood University of Technology Journal of Mining and Environment 2251-8592 9 3 2018 07 01 Estimation of reliability-based maintenance time intervals of Load-Haul-Dumper in an underground coal mine 761 770 1245 10.22044/jme.2018.6813.1508 EN J. Balaraju Department of Mining Engineering, NITK Surathkal, Karnataka, India M. Govinda Raj Department of Mining Engineering, NITK Surathkal, Karnataka, India C.H.S.N. Murthy Department of Mining Engineering, NITK Surathkal, Karnataka, India Journal Article 2018 02 21 Reliability estimation plays a significant role in the performance assessment of mining equipment, and aids in designing efficient and effective preventive maintenance strategies. Continuous and random/irregular occurrence of failures in a system could be the main cause for performance drop of machinery. The accomplishment of a projected level of production is possible only by an efficient operation of the equipment. In order to improve the equipment life, a critical analysis of failure/breakdown occurrences is required to be carried out, and appropriate remedial measures need to be designed and implemented to enhance reliability. This paper presents a reliability analysis of Load-Haul-Dumper (LHD) in an underground coal mine. The goodness-of-fit distribution of each LHD was made through the Cramer-Von-Mises statistic test. The parameters involved were estimated using both the maximum likelihood analytical estimation process and the graphical process. Further, an attempt was made to reduce the total cost of operation by estimating the reliability-based preventive maintenance time intervals. https://jme.shahroodut.ac.ir/article_1245_8bcdfddf7f49a240dbd6a223aa8ee886.pdf