塑性区沟槽对爆炸应力波屏蔽效应研究

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Abstract The gap in plastic zone has been proved to be one of the most effective techniques for shielding against blasting stress wave. Based on the mini-chemical explosive technique，0.125 g TNT mini-spherical explosive charges was used as the explosive source for the laboratory researches of the gap shielding against blasting stress wave on the ?1 370 mm×1 200 mm loess samples. The shielding effects of gap on blasting stress wave were studied through the analysis of theory and experimental results. The results show that：(1) The gap in plastic zone is destroyed and the principle of the gap shielding against the blasting stress wave is different from that in elastic zone. (2) The shielding factors based on the amplitudes of the particle velocities and displacements exist maximum value in the shielding zone of gap. (3) The gap in plastic zone has delay effect for the blasting stress wave. (4) The experimental results qualitatively validate the theoretical analysis of the gap shielding against the blasting stress wave.

Key words： explosion mechanics underground explosion stress wave shielding gap mini-chemical explosion

Received: 17 October 2011

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https://rockmech.whrsm.ac.cn/EN/Y2013/V32/Is1/2642

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