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Rock Breakage Theory By Crusher S

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 = fbvb/A ~25) Eng. Geol., 2(5) (1968) 293-314 ROCK BREAKAGE BY CRUSHING, BLASTING, AND DRILLING 305 where: fb = blow frequency; vb = volume removed per blow.

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