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Reliability, availability and maintainability (RAM) investigation of Load Haul Dumpers (LHDs): a case study

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Abstract

Load Haul Dumpers (LHDs) are prominent equipment employed for transportation operations in many of the underground mines. This equipment often suffers from frequent breakdowns due to a variety of technical and managerial practices resulting in increased maintenance costs and loss of production and productivity. Reliability, Availability and Maintainability (RAM) analysis deal with the optimal functioning of equipment, maintenance scheduling, controlling cost, and improvement of availability and performance. Keeping this in view, the current study focused on the estimation of the performance of the equipment using RAM investigation. The required failure and repair data of LHDs were collected from field investigations. Graphical analyses using Trend and serial correlation tests and analytical analysis using Statistic-U test were conducted to validate the Independent and Identical Distribution (IID) nature of the data sets. Based on the above tests, the Renewal Process was adopted to carry out the RAM analysis. The best-fit approximation of datasets was selected by performing the Kolmogorov–Smirnov (K–S) test. In addition to that, the reliability-based Preventive Maintenance time intervals were estimated to improve the percentage of reliability.

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Authors and Affiliations

  1. Dept. of Mining Engineering, NITK Surathkal, Mangalore, 575 025, India

    Balaraju Jakkula, Govinda Raj Mandela & Suryanarayana Murthy Chivukula

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  1. Balaraju Jakkula
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  2. Govinda Raj Mandela
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  3. Suryanarayana Murthy Chivukula
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Correspondence to Balaraju Jakkula.

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Jakkula, B., Mandela, G. & Chivukula, S. Reliability, availability and maintainability (RAM) investigation of Load Haul Dumpers (LHDs): a case study. Int J Syst Assur Eng Manag 13, 504–515 (2022). https://doi.org/10.1007/s13198-021-01154-3

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  • DOI: https://doi.org/10.1007/s13198-021-01154-3

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