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Keywords: perimeter powder factor
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Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2002, November 25–27, 2002
Paper Number: ISRM-EUROCK-2002-044
... to the Opening Wall) by Maerz N.H. et al., 1996 - see Fig. 1. These deviations are normally undesirable because they generate higher costs in the constructive process of the underground opening. 3. PREDICTION OF EDZ FROM EXPLOSIVE ACTION BY PERIMETER POWDER FACTOR (PPF) AND ROCK QUALITY DESIGNATION (Q...

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