Analysis of a rock bolt failed in service

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dc.contributor.authorGamboa, E.
dc.contributor.authorAtrens, A.
dc.contributor.conferenceInternational Corrosion Congress (15th : 2002 : Granada, Spain)
dc.date.issued2002
dc.descriptionExtent: 9p. Also cited as: Proceeding, 15th International Corrosion Congress, Granada (2002): Paper 811
dc.description.abstractThis paper describes a fractographic investigation of a rock bolt failed in service in a NSW colliery and relates the failure to service conditions. Optical microscopy revealed that the fracture surface contained a dark thumbnail shaped area 1.9 mm deep. The rest of the fracture surface was quite shiny. There was no necking or other evidence of plasticity. This fracture appearance is consistent with stress corrosion cracking (SCC) followed by fast brittle fracture. There were secondary cracks also indicative of SCC. SEM observation characterized the SCC surface. This failure analysis has indicated that rock bolts can fail in service in a brittle manner with no prior warning at stresses much lower than their ultimate tensile strength. This represents a new failure mode for a critical mine component, that is critical for mine safety. There is no prior experience with this failure mode, and laboratory work is needed to understand the failure mechanisms. With understanding of the failure mechanism, it will be possible to devise counter-measures.
dc.description.statementofresponsibilityE Gamboa and A Atrens
dc.identifier.citationFrontiers in Corrosion Science and Technology, 2002; pp.4548-4556
dc.identifier.isbn9781604235999
dc.identifier.urihttp://hdl.handle.net/2440/78808
dc.language.isoen
dc.publisherCurran Associates
dc.rightsCopyright status unknown
dc.subjectService failure
dc.subjectRock bolt
dc.subjectStress Corrosion Cracking
dc.titleAnalysis of a rock bolt failed in service
dc.typeConference paper
pubs.publication-statusPublished

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