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Allowed Quantity of Explosive Charge Depending on the Distance from the Blast
Authors:Josip Mesec  Darko Vrkljan  Zvonimir Ester
Affiliation:(1) Geotechnical Faculty in Varaždin, University of Zagreb, Hallerova 7, Varaždin, 42000, Croatia;(2) Faculty of Mining, Geology and Petroleum Engineering, University of Zagreb, Pierottijeva 6, Zagreb, 10000, Croatia
Abstract:This paper analyses results of trial, construction and quarry blasting, carried out in sediment rock deposits, mainly limestone and dolomite. Based on results of seismic measurements and engineering geological observations in sedimentary formation, an empirical relationship was established between ground vibration and geological strength index (GSI). The charge weight of explosive that may be detonated per delay for any given distance of nearby structures from the blast is approximately determined by using the concept of the scaled distance (SD) along with the DIN 4150 standard.
Keywords:Blasting  Ground vibration  Scaled distance  Allowed quantity of explosive charge per delay
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