Seisinolog Society of America

Anastasia Stroujkova, Jessie L. Bonner, Mark Leidig, Peter Boyd, and Randolph J. Martin

Penerbit : Diane I. Doser

Tahun : 2012

Abstract We studied seismic-wave generation from five small (60-122 kg) fully contained explosions detonated in Barre Granite as a part of the New England Damage Experiment (NEDE). The explosions were conducted using three types of explosives with different velocities of detonation (VOD): black powder, ammonium nitrate fuel oil (ANFO) emulsion, and composition B (COMP-B). Empirical evidence suggeststhat the low VOD explosives produce more shear-wave energy than high VOD explosives. The proposed mechanisms to explain this effect include: (a) inhibition of gas-driven fracture propagation by thicker pulverized zone for high VOD explosions, and (b) fracture toughness increase at higher loading rate. The main objective of the experiment was to study differences in shear-wave generation between different types of explosives, and to determine the likely mechanism responsible for these differences.

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