presplitting

The Technology Study of Roof Coal Presplitting in Thick Seam Caving Coal Mining

厚煤层放顶煤开采顶煤预裂技术研究

The comprehensive blasting technology which combines U kerf blasting with presplitting blasting and smooth blasting and millisecond delay blasting was studied.

研究了U型拉槽爆破与预裂爆破、光面爆破和毫秒延时爆破相结合的综合爆破技术；

The application of presplitting blasting and smooth blasting during construction of boundary line control

预裂爆破和光面爆破在边线控制施工中的应用

An analysis was made of key technical elements in side slope quality control for road cut blasting, i.e., paying attention to the action of un-coupled charging structure; ensuring fissure caused by presplitting blasting;

分析了路堑爆破边坡质量控制的几个重要技术要素，主要是：重视不耦合装药结构的作用，确保预裂爆破成缝及处理好预裂炮孔与前排药包位置的关系。

The technology of explosion in drill hole to draw out casing pipe the presplitting technique

孔内爆破起拔井壁管工艺预裂爆破

A Practice of Presplitting Blast for Long Hole Benching in Multi-Governing Factor Condition

多控制因素条件下深孔台阶预裂爆破的实践