AFRICAN MINING BRIEF 01 sep 2013, p - · PDF fileAFRICAN MINING BRIEF 01 sep 2013, p.50 ROCK...
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AFRICAN MINING BRIEF 01 sep 2013, p - · PDF fileAFRICAN MINING BRIEF 01 sep 2013, p.50 ROCK ENGINEERING Controlled peripheral blasting at depth in strong quartzite Rock engineering
