Performance Evaluation of Underground Mining Machinery: A Case Study
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TECHNICAL ARTICLE—PEER-REVIEWED
Performance Evaluation of Underground Mining Machinery: A Case Study J. Balaraju
. M. Govinda Raj . Ch. S. N. Murthy
Submitted: 11 June 2020 ASM International 2020
Abstract Unexpected occurrence of uneven breakdowns and their consequences have a significant influence on the equipment life. Hence, there is a need to discover the motives for the happening of critical potential failures and required repair or replacement action to control. Reliability analysis is utilized to approximate the performance of the equipment. In this study, the performance of the underground mining machinery known as load haul dumper (LHD) has been estimated with reliability analysis. The best-fit distribution of the data sets was selected by testing the numerous statistical distributions using the Kolmogorov–Smirnov (K-S) test. The percentage of reliability of each subsystem of the LHD machine was computed based on the best-fit approximation. The overall system reliability of the equipment was estimated using a series configuration-based reliability block diagram (RBD) approach. The reliability-based preventive maintenance (PM) time intervals were also computed for estimated 90.00% reliability. To accomplish the desired level of reliability, a review on maintenance programs should be made. Possible recommendations were made to the maintenance department in the industry for improvement in equipment. Keywords Production LHD Breakdown Reliability RBD Maintenance
J. Balaraju (&) M. Govinda Raj Ch. S. N. Murthy Mining Engineering Department, N.I.T.K. Surathkal, Mangalore, Karnataka, India e-mail: [email protected]
Introduction The efficient usage of capital-intensive equipment in the work environment results in the accomplishment of the anticipated degree of production and productivity. In the present competitive business environment, every industry is regularly searching for improvement in their day-to-day production levels to survive with a noble reputation in society [1]. In the underground mining segment, utilized equipment for transportation purpose, i.e., load haul dumper (LHD), assumes an indispensable job in the accomplishment of the desired level of production rate. The recorded underground metal mine’s production in India is not at a satisfactory level from the last few decades. Unavailability of the equipment in the working phase is only the prominent reason for the fall of production levels in the industry [2]. The best probable utilization of equipment can be possible when the probability of equipment is readily available; the consequence of this should lead to an increase in the production levels of equipment. Enhancement of machinery availability can be possible through a reduction in the downtime hours. Assessment and prediction of the reliability of intricate repairable assemblies play an important role in the estimation of overall performance. In general, complicated system performance usually relies on the usage of equipment, working ambiance, and adequacy of upkeep,
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