presplitting

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

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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

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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

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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。

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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；

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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

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