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

作　　者：陈诗伟 郭文康 卢韦 卜禄坤 CHEN Shiwei

机构地区：[1]福州大学紫金地质与矿业学院,福建福州350116 [2]福州大学爆炸技术研究所,福建福州350116 [3]紫金矿业建设有限公司,福建龙岩364299

出　　处：《福建建设科技》2023年第3期57-59,98,共4页Fujian Construction Science & Technology

基　　金：国家自然科学基金项目(51679093、51374112);乌后紫金采场深孔回采爆破控制技术研究课题(01612203)。

摘　　要：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.

关 键 词：爆破空气冲击波 孔壁冲击压力 轴向不耦合系数 厚壁圆筒试验 

分 类 号：O381[理学—流体力学]