Failure Modes Exhibited by Dump Ropes on BMA Draglines

Johnston, Timothy G (2006). Failure Modes Exhibited by Dump Ropes on BMA Draglines B.Sc Thesis, School of Mechanical and Mining Engineering, The University of Queensland.

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Author Johnston, Timothy G
Thesis Title Failure Modes Exhibited by Dump Ropes on BMA Draglines
School, Centre or Institute School of Mechanical and Mining Engineering
Institution The University of Queensland
Publication date 2006
Thesis type B.Sc Thesis
Supervisor Lenny McInnes
Jeff Gates
Total pages 55
Language eng
Subjects 091405 Mining Engineering
Formatted abstract

Draglines are a vital piece of mining equipment and ensuring they operate with maximum availability is considered to be essential in BMA’s mining operations. The service life of a dump rope averages ten days, but has been known to fail in one. Achieving an average dump rope life of one planned maintenance interval of 28 days has the potential to significantly improve availability. To achieve this it is essential that the modes of failure that cause the short dump rope life are determined and addressed appropriately. Dump rope samples have been examined using macroscopic examination, microscopic examination and hardness testing. Microscopic examination showed evidence of fatigue crack growth in failed and nonfailed wire samples. The fatigue cracking found was initiated from fretting fatigue with propagation due to the combined bending and axial stresses. Using this information it was possible to determine the requirements of an alternative rigging configuration. A new rigging configuration would require a greater D/d ratio and or a lower rope tension to achieve the prescribed 28 day service life. Alternatives were assessed using these characteristics to determine their suitability. More research can now be done into finding a suitable alternative rigging configuration that addresses the failure modes present in the current dump rope configuration. 

Keyword Dragline
Mining -- productivity

Document type: Thesis
Collection: UQ Theses (non-RHD) - UQ staff and students only
Citation counts: Google Scholar Search Google Scholar
Created: Mon, 12 May 2014, 12:50:02 EST by Mr Lachlan Wong on behalf of Scholarly Communication and Digitisation Service