摘要
通过对测试到的距爆源8—16 cm范围内的径向爆炸波信号的识别和分离,将爆炸波分为爆炸冲击波区、应力波区及爆生气体膨胀作用区,并就分离各区的爆炸波基本特点、能量分配及衰减特征开展了定量研究。结果表明:在距离炮孔中心线40R0的测点范围内同时受到爆炸冲击波、应力波和爆生气体膨胀的共同作用;爆炸波作用过程是高加载率下的冲击波压应力、应力波拉压应力和爆生气体膨胀的准静态作用的联合复杂作用过程;爆炸波总能量传递率ηt为31.8%—46.9%;3种能量中,爆炸冲击波、应力波和爆生气体膨胀作用能量传递率ηi分别为31.0%—40.8%、0.31%—0.98%和0.52%—4.9%;分离各区的能量传递率、比能和能量均随到爆源距离R的增大而衰减,衰减幅度随R的增大而加快。
The explosion wave was divided into explosion shock wave and stress wave and detonation gas action areas through recognized and separated the radial explosion wave signals measured in the range of 8-16cm from blast source, and the basic characteristics, energy distribution and attenuate rule of each area of explosion wave were quantitatively studied. The results show that the measure points in the range of 40R0 from center line of borehole were acted together of explosion shock wave and stress wave and detonation gas;The process of explosion wave action was the complicated combined action of compressive by shock wave and tensile by stress wave and quasi-static effect by detonation gas. The total energy transmitting ratio ηt of explosion wave was 31.8%-46.9% and ηi of the three kinds of separated explosion wave were 31.0%-40.8% ,0.31%-0.98% and 0.52%-4.9% respectively. The energy transmitting ratio and special energy and energy of separated explosion wave were decreased with distance increasing, but the attenuate amplitude increased rapidly with distance increasing.
出处
《爆破》
CSCD
北大核心
2009年第1期1-5,9,共6页
Blasting
基金
教育部博士点基金新教师项目资助课题(200805331148)
国家自然科学基金重大项目专题(50490272)
教育部"优秀青年教师资助计划"课题(EYTP-2134)
关键词
爆炸波
识别和分离
能量分配
衰减
爆破机理
explosion wave
recognize and separate
energy distribution
attenuate
mechanism of blasting
