The test results show that the technology of vertical deep hole presplitting blast is a feasible method in Shi Rengou Iron Mine.
在石人沟铁矿的试验结果表明采用垂直深孔预裂爆破技术在该矿是一种可行方案。
The technique of deep-hole presplitting blasting in coal bed is widely used for gas predrainage recently; but its blasting theory is not clear up to now.
煤层深孔预裂爆破近年来在瓦斯抽放中运用日益增多，但目前对其爆破理论研究较少。
The notch blasting mechanism is expounded by the fracture mechanics principle, the cutting tool parameters for notch presplitting blasting is put forward.
利用断裂力学原理阐明了切槽爆破机理，提出了切槽预裂爆破的刀具参数，依据现场初步试验成果指出了下一步应改进的切槽刀具参数。
Under complex condition in a factory building, two large-scale reinforced concrete columns of the factory building were partially cut by the presplitting blasting.
在厂房内复杂环境下，用预裂爆破对两个大型钢筋混凝土厂房立柱进行部分切割。
The selection of parameters in smooth and presplitting blasting plays an important role in blast effect. It is an important part in project design of smooth and presplitting blasting.
爆破参数的选择直接影响着爆破效果，是光面、预裂爆破工程设计的重要内容。
Compared with the conventional presplitting methods, the shaped charge is obviously more effective in presplitting blasting and especially useful in controlling the presplitting slots.
聚能预裂爆破与普通预裂爆破相比，爆破效果明显提高，能有效地控制预裂缝的扩展。
Compared with the conventional presplitting methods, the shaped charge is obviously more effective in presplitting blasting and especially useful in controlling the presplitting slots.
聚能预裂爆破与普通预裂爆破相比，爆破效果明显提高，能有效地控制预裂缝的扩展。
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