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Drilling And Blasting With Crushers Nige

The drilling rate can be expressed in terms of the frequency of contact of the bit tooth with the rock and the volume of rock fragmented by each blow it follows therefore that R fbvbA 25 Eng Geol 25 1968 293314 ROCK BREAKAGE BY CRUSHING BLASTING AND DRILLING 305 where fb blow frequency vb volume removed per blow

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