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WhatsApp: +86 18203695377WEBAug 1, 2016 · Fullface tunnel boring machine (TBM) tunnelling has unparalleled advantages over conventional drillandblast (DB) techniques in terms of higher advance rates and lower risk levels in favourable ground conditions. However, there are only a few successful TBM appliions in mines. The aim of this paper is to discuss the technical .
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