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Overbreak
(intransitive) To break over.
* '''1958''', Australasian Institute of Mining and Metallurgy, ''Proceedings - Australasian Institute of Mining and Metallurgy: Issues 183-188'':
*: This proved wise [..]
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OverbreakExcavation that occurs outside of the "B" line of a tunnel owing to the irregular pattern of rock breakage; the definition also describes concrete required to fill this overexcavated space in lined tunnels.
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