深孔控制爆破开挖破碎井技术的研究及应用

大孤山铁矿在矿石三期破碎系统的建设过程中，采用垂直深孔爆破技术挖掘破碎井基坑，使挖掘工期大幅度缩短，在爆破设计及施工过程中，成功地运用孔间、孔内微差预裂爆破技术，取得了较佳的技术经济效果，为国内类似的工程爆破提供了一些有价值的借鉴。

Research and Application of Crushing Pit Excavation by Controlled Long Hole Blasting

In the construction of Phase Three ore crushing system at Dagushan Iron Mine, vertical long-hole blasting technology was used in excavating crushing pit base, which shortened the excavation period. In blasting design and construction, the technology of between-holes and in-hole short-delay presplitting blasting was succesfully applied and achieved good technical and economical results, providing some valuble references to similar domestic engineering blasting.