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R. Meyer J. Köhler A. Homburg Explosives

R. Meyer J. Köhler A. Homburg Explosives

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299 Strength<br />

Fig. 22. Specific energy and relative weight strength in relation to lead block<br />

test values.<br />

The relationship between the size of the lead block excavation and the<br />

specific energy is not linear. The true relationship may be seen in<br />

Fig. 22 (representation of experimental results).<br />

The relationship between weight strength and the coefficient d’utilisation<br />

pratique (c.u.p) used in France (W Lead Block Test) can be given<br />

by the empirical formula weight strength (%) = 0.645 V(%) c.u.p. and<br />

(%) c.u.p. = 1.55V(%) weight strength.

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