摘要
作者在水泥砂浆模型上就切口炮孔和QC药卷在预裂爆破时裂纹扩展速度进行了测量。试验表明,在爆炸作用下存在一个裂纹快速扩展v_(max)的临界应力强度因子K_s。
The velocities of crack developing of pre-splitting on concrete models withnotched borehole or QC cartridge were measured. The results of experiments in-dicate that there is a critical stress intensity facor K_s of crack developing atmaximum speed. When K_S>K_D>K_(ID). v = (0.05～.15) C_p and K_D>K_s v = (0.38～0.4) C_p
关键词
爆破
岩石
裂纹
扩展
速度
presplit blastingvcrack propagation
cartridges/QC cartidges
QC cartridges
