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Abstract

A subsurface magazine is proposed to reduce the debris and the air-blast pressure caused by an accidental explosion. First, 1/20-scale indoor explosion model tests for subsurface magazines were conducted to examine the characteristics of an air-burst and ground shock vibration. It was found from the test results that the peak blast pressure (P₀) for an overburden thickness (T) of 50 cm was 0.84–0.98 times that for T = 15 cm, and the P₀ for a loading density R = 9.0 kg/m³ was 1.09–1.39 times that for R = 4.5 kg/m³. It was also found that the maximum ground shock velocity V_max for T = 50 cm was 0.57–1.07 times that for T = 15 cm. Second, the P₀ was formulated as a function of the scaled distance Z, T, and R. Third, the V_max was formulated as a function of Z and T. Finally, these formulae were validated using the test data obtained by performing a 1/10-scale field test.

Keywords

Scaled subsurface magazine explosion test internal explosion blast pressure ground shock vibration

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Internal explosion tests for scaled subsurface magazines

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