Precision Rock Excavation: Beyond Controlled Blasting and Line Drilling

The strictness of the result of an excavation, whether mechanical or by means of explosives, is naturally conditioned by its objective and, therefore, by the type of technique applied to achieve it. To attain the best results in terms of rock breakage, and with respect to the final profile, it is im...

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Bibliographic Details
Published in:Mining (Basel) 2021-09, Vol.1 (2), p.192-210
Main Authors: Cardu, Marilena, Saltarin, Simone, Todaro, Carmine, Deangeli, Chiara
Format: Article
Language:English
Subjects:
controlled blasting
line drilling
mechanical cutting
presplitting
smooth blasting
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Summary:The strictness of the result of an excavation, whether mechanical or by means of explosives, is naturally conditioned by its objective and, therefore, by the type of technique applied to achieve it. To attain the best results in terms of rock breakage, and with respect to the final profile, it is important to evaluate the specific excavation energy and its optimization. This study, being a revision of different techniques to achieve good quality of the final walls, focuses on evaluating the effects of those techniques on the quality of the result, in both open-pit and underground operations. Different geometries and configurations can be applied to both quarrying and tunneling blasts. This study aims to push contour blasts to their limits, and the main aspects are discussed in order to improve the blast parameters in daily practice.
ISSN:2673-6489
2673-6489
DOI:10.3390/mining1020013