重复爆炸条件下地冲击效应试验研究

EXPERIMENTAL STUDY ON UNDERGROUND SHOCK EFFECTS UNDER REPEATED EXPLOSIONS

为探索常规武器重复打击下岩石介质中压力波及正压作用时间随传播距离的增加而衰减的规律,进行岩石介质中不同比例装药和比例距离的一次钻孔爆炸和重复钻孔爆炸试验。试验结果表明:在相同试验条件下,相同测点处一次钻孔爆炸所产生的峰值压力和正压作用时间要小于二次钻孔爆炸,其衰减速度要低于二次钻孔爆炸,但其衰减趋势均符合岩石介质中压力波衰减规律。对试验结果进行分析,给出峰值压力和正压作用时间随比例距离增加而衰减的关系曲线,并拟合得出相应的经验公式,揭示峰值压力和正压作用时间随比例距离增加而呈指数衰减的规律。

In order to research the decay laws of pressure wave and positive pressure actuation duration with the increasing propagation distance under the repeated penetration and explosion of conventional weapons in rock,the tests with varying scale charge and scale distance of the first drilled explosion and the repeated drilled explosion are completed.The experimental results show that the peak pressure and positive pressure actuation duration by the first drilled explosion on the same measuring points are less than those by repeated drilled explosion;the decay speeds of peak pressure and positive pressure actuation duration by the first drilled explosion are lower than those by repeated drilled explosion,and their decay tendency are in agreement with the decay laws of pressure wave in rock under the same experiment conditions.The decay curves of peak pressure and positive pressure actuation duration with increasing scale distance have been given by the analysis of test results,and the corresponding empirical formulas have been presented.The exponential decay laws of peak pressure and positive pressure actuation duration with increasing scale distance have been discovered.