The goal of this study is to investigate shock waves propagation, in a geometrically complex confined and semi-confined environment, consecutive to the detonation of a spherical explosive charge. In this objective, small scale experiments are conducted in laboratory and are completed with numerical analysis. Shock waves are generated thanks to spherical detonation of a gas mixture composed of propane-oxygen in stoechiometric proportion. Two main configurations are studied: the first represents a pyrotechnic workshop and the second is a warehouse containing gas cylinder. Experimental and numerical results are then compared. Complementary studies are realised to describe blast wave propagation inside a semi-confined volume thanks to a new experimental approach named wall by wall. Finally, in order to simulate TNT charges detonation by computational means, an important study is conducted to determine a mass equivalent between TNT and gas mixture.
