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爆生气体可经过裂缝传播到水平自由面、并产生漏斗效应及随之而来的飞石。飞石表现的这种机理与冲击波的气体释放脉冲密切有关
expl. blast gases can propagate through cracks to the horizontal free surface and cause cratering and associated flyrock. This mechanism of flyrock manifestation is closely related to the gas release pulse GRP for airblast