Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Precision Rock Excavation: Beyond Controlled Blasting and Line Drilling

Version 1 : Received: 29 July 2021 / Approved: 2 August 2021 / Online: 2 August 2021 (12:56:17 CEST)

A peer-reviewed article of this Preprint also exists.

Cardu, M.; Saltarin, S.; Todaro, C.; Deangeli, C. Precision Rock Excavation: Beyond Controlled Blasting and Line Drilling. Mining 2021, 1, 192-210. Cardu, M.; Saltarin, S.; Todaro, C.; Deangeli, C. Precision Rock Excavation: Beyond Controlled Blasting and Line Drilling. Mining 2021, 1, 192-210.

Journal reference: Mining 2021, 1, 13
DOI: 10.3390/mining1020013

Abstract

The strictness of the result of an excavation, whether mechanical or by means of explosives, is naturally conditioned by the objective, and therefore by the type of technique applied to achieve it. To attain the best results in terms of rock breakage and respect of the final profile, it’s important to evaluate the excavation specific energy and its optimization. This research focuses on evaluating the effects of different techniques on the quality of final walls in open-pit and underground operations. Different geometries and configurations can be applied to both quarrying and tunnelling blasts. The research is aimed to push contour blasts to their limits, and the main aspects are discussed in order to improve the blast parameters in the daily practice.

Keywords

presplitting, smooth blasting, line drilling, mechanical cutting, controlled blasting.

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