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AIMING TO THE PERFECT BLASTING RESULT REALITY OR JUST A UTOPIA? FACTS, PARAMETERS AND THOUGHTS BASED ON TWO CASE HISTORIES FROM EGNATIA ODOS – RING ROAD OF SALONICA SECTION, IN NORTHERN HELLAS
Abstract
The flyrock from blasting operations can harm, damage or expose the workers of a particular worksite or the dwellers of a wider area of extractive activities (quarry, mine, construction site) to damage risks; in some cases even death might be caused, too. There are certain and different ideas and theoretical approaches regarding the evaluation of causes and the implementation of flyrock prevention measures to be taken, as well. This implementation, however, in practice requires a more delicate and rather professional management that will have to be highly effective; unfortunately, its true value will only be judged from its final outcome. In July 2003, we happened to manage a particular blast operation in which we had to be exceptionally careful to prevent, or at least minimize, flyrock from happening. That was a quite challenging situation because the blast site was too close to a heavy traffic motorway, the Ring- Road of Salonica, in Northern Hellas (*). The parameters and characteristic elements that had been evaluated, the measures that had been taken and materialized, the overall risk management, that had been considered the best for us to implement and materialize in order to succeed in achieving a perfect blast project with zero flyrock events, are analyzed in the followings.
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References2
(for Case History 1) Baliktsis Elias and Fragoulis Manolis (9-13/7/2003). “ Effective blasting management through consulting and engineerin g. Facts, Ideas and Case Histories” , in the SGEM2003 - 3rd International Conference on Modern Management of Mine Producing Geology and Environmental Protection (Varna, Bulgaria) Baliktsis Elias – EXORIXI S.A. (25/10/2003). “Flyrock prevention through examples”, lecture in the Scientific Conference “Blasting technology and know-how 2003”, organized by ETEK - Mining Engineer Committee and Scientific Technical Chamber of Cyprus (Nicosia, Cyprus) EXORIXI SA (1/97-1/2000). «Blast Design and Vibration Monitoring. Removal of the Northern Hills - Construction of the New Athens International Airport in Spata» . Un-published reports on flyrock prevention and management. Contractor: MICHANIKI S.A. - HOCHTIEF A.G. EXORIXI S.A. (12/1999). «Causes and prevention measures for flyrock restriction during blasting operations» . Un-published report for the Project: Transport Axis Patras- Athens–Salonica-Evzonoi. Contractor: J/V METON - AKTOR - TEB - AEGEK EXORIXI SA (7/2003). “Ring-road of Salonica - K9 Crossing - Pre-blast and post- blast project reports - EYKLIDES/EGNATIA ODOS” (un-published reports) EXORIXI SA (1/2004). «Blast design and implementation between the buildings of Generator and back-up facilities» of the New Power Plant Project of ATHERINOLAKKOS CRETE (un-published report). Contractor: ATHINA S.A. (Owner PUBLIC POWER CORPORATION) Baliktsis Elias and Baliktsis Alexander (7-9/6/2004). “ Flyrock risk prevention – from theory and ideas to a perfectly applied blasting project”, in the AMIREG 2004 – 1st International Conference on Advances in Mineral Resources Management and Environmental Geotechnology (Hania, Crete, Hellas) REFERENCES (for Case History 2) Baliktsis Elias (10/2003). “CONTROLLED EXPLOSIVE DEMOLITION OF CONCRETE STRUCTURES - Recent cases, experiences and applications from Hellenic works», in the 14th Hellenic Conference on Concrete Structures (TEE – Hellenic Chamber of
Engineers, Kos Island, Greece)
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