轴向不耦合空气间隔装药孔壁冲击压力模型试验研究

Axial uncoupled air spacer charge hole wall impact pressure model test study

为研究轴向空气间隔装药的炮孔中爆炸形成的孔壁冲击压力时程规律,通过室外混凝土模型爆破试验,探究了孔壁峰值冲击压力与空气间隔轴向不耦合系数的内在联系。研究表明:轴向不耦合空气间隔装药爆破时,炮孔内峰值压力随着轴向不耦合系数的增大而降低,超压峰值的衰减随炮孔长度的增大而减缓;轴向不耦合系数K=1.50~2.00时,孔壁压力分布较均匀,最大峰值压力降低,适合于工程实践。

In order to study the time history law of the impact pressure of the hole wall formed by the explosion in the gun hole of the axial air spacer charge,the intrinsic relationship between the peak impact pressure of the hole wall and the axial uncoupling coefficient of the air interval was explored through the outdoor concrete model blasting test.The research results show that for the blasting of axial uncoupled air-decked charge,the peak pressure decreases with the increase of the axial uncoupling coefficient;the attenuation of the overpressure peak is weakened with the increase of the length of the blasthole.When the axial uncoupling coefficient is K=1.50~2.00,the hole-wall pressure is uniformly distributed,the maximum peak pressure reduces,suitable for engineering practice.