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The reliability and maintainability analysis of pneumatic system of rotary drilling machines
Faculty of Mining Engineering, Sahand University of Technology, Tabriz.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Operation, Maintenance and Acoustics.
Faculty of Mining, Petroleum & Geophysics, Shahrood University of Technology.
Faculty of Mining, Petroleum & Geophysics, Shahrood University of Technology.
2013 (English)In: Journal of The Institution of Engineers (India): Series D, ISSN 2250-2122, Vol. 94, no 2, 105-111 p.Article in journal (Refereed) Published
Abstract [en]

In any blasthole drilling the bottom of theblasthole must be kept clean by evacuating drill cuttings orit flushing as soon as they appear to ensure efficient drilling.If it is not done well, a large quantity of energy will beconsumed in regrinding with the consequent wear on drillbit and decrease penetration, apart from the risk of jamming.Therefore, research on reliability and probability ofsafe operation of pneumatic system of drilling machines isof prime importance to ensure safe drilling operations. Inthis paper, reliability of this system was modeled andanalyzed. To doing this research, drilling machines inSarcheshmeh Copper Mine in Iran have been selected fordata collection and analysis. After reliability modeling ofpneumatic system, maintenance scheduling has been presentedbased on different reliability levels. There were fourrotary drilling machines in this mine (named A, B, C andD). Results showed that after about 7 h drilling ofmachines A and B, and after 103 and 44 h drilling ofmachines C and D respectively, noticeably the reliability ofpneumatic system reached to 80 %. As a result, machinesC and D have more reliable pneumatic systems in comparisonto machines A and B and checking and servicing ofpneumatic system before these time was essential. Also,maintainability analysis showed that more failures ofpneumatic system of machines A, B, C and D will benoticeably repaired at about 28, 34, 6 and 9 h.

Place, publisher, year, edition, pages
2013. Vol. 94, no 2, 105-111 p.
Research subject
Operation and Maintenance
URN: urn:nbn:se:ltu:diva-13043DOI: 10.1007/s40033-013-0026-0Local ID: c343e365-cc19-48c6-8321-dbbc18a7459bOAI: diva2:985994
Godkänd; 2013; 20131213 (hadhos)Available from: 2016-09-29 Created: 2016-09-29Bibliographically approved

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