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Mines Safety Significant Incident Report No. 156

Detonation of misfired explosive during bogging operation

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During waste bogging operations in a development heading at a mine, the loader operator heard a noise that sounded like a detonation of explosive.

Examination of the remaining muck pile at the face did not reveal any explosive material. A further examination of the waste that had already been bogged from the face unearthed two pieces of a cord-based explosive typically used for perimeter blasting in development headings. The detonator cord was of heavy duty construction with a nominal core charge of 70 g/m pentaerythritol tetranitrate (PETN), which can be initiated by significant impact, friction or heat.

Fortunately, no injury resulted from this incident. Detonation of misfired explosives can result in fly rock and potentially serious injury.


Department of Mines and Petroleum

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Relates to Western Australia (WA)

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PDF Document

Western Australia




Government of Western Australia


17 Jul 2009

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