光面爆破和预裂爆破技术已广泛地在路堑石方中应用，研究钻孔技术，尽量减少钻孔误差，是保证光面和预裂爆破的关键，在峒室加预裂一次爆破成型中尤为重要。
To study the drilling technique for decreasing the errors of ihe drilled hols as possible is to be ensured of the quality to use them.
在路堑开挖石方施工中，采用挤压爆破技术及强行拉槽双向挤压爆破技术控制爆破飞石，爆破块度及震动。
This paper discusses the control of flying rocks, lump size and vibration of extruding blasting in cutting excavation.
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