Balakrishnan, Vineeth (2024) Evaluating the efficacy of air-decking technique for surface mine blasts. International Journal of Mining and Mineral Engineering, 15 (3). pp. 351-362.

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Abstract

The study underlines the effect of air-decking on rock fragmentation, blast induced ground vibration, and air overpressure. Five trial blasts have been conducted in a nearby limestone mine using wooden spacers as air-decks of 1.2 m length to replace about 20% of the explosive by weight. Also, the continuous velocity of detonation in a blast hole is measured. It is observed that the detonation wave, which comes across such large non-explosive zones, gets attenuated as no explosive is available, and the detonation becomes completely dead. The fragmentation achieved in the experimental trial blasts presented in the paper produced a significant number of boulders. The introduction of air decks in the column replaces the explosive, which leads to a reduction in the maximum charge per delay. The air-deck technique is found feasible in regions that have restrictions on the charge per delay due to excessive ground vibration and air overpressure.

Item Type:	Article
Uncontrolled Keywords:	air-deck technique, explosive consumption reduction techniques, rock fragmentation, velocity of detonation
Subjects:	Mine Subsidence
Divisions:	UNSPECIFIED
Depositing User:	Mr. B. R. Panduranga
Date Deposited:	15 May 2025 09:44
Last Modified:	15 May 2025 09:44
URI:	http://cimfr.csircentral.net/id/eprint/2824

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