护壁爆破的基本原理与爆破效果的声波评价

Principle of Double-pipe Protecting Borehole Wall Blasting and Sonic Wave Evaluation of Blasting Effect

采用半圆套管的护壁爆破技术在产生定向裂隙的同时,保留部分的岩体还受到套管的保护,可避免爆破损伤。论述了在爆破冲击波和爆炸气体准静压作用下,双侧和单侧半圆套管的护壁的基本原理,以及套管护壁爆破和光面爆破效果对比试验的声波评价。

Although semicircular double-pipe protecting borehole wall blasting technology brings about directional cracks, reserved rock can be is protected by double-pipe, and blasting darnnification can be avoided. Principle of bilateral and unilateral semicircular double-pipe protecting borehole wall blasting in blasting shock-wave and quasistatic stress effect of gaseous explosion product are discussed in this paper. Comparative testing of double-pipe pro- tecting borehole wall blasting and smooth blasting and sonic wave evaluation are accomplished.