介绍了采用控制爆破技术施工位于井底车场及主要运输大巷的信集闭峒室，条件复杂，岩性变化大，要求安全性高。
This paper introduces controlled blasting technology on signal chamber of pit-bottom and main haulage roadway, which are of complex condition, lithological character and highly security.
介绍了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峒室，使挖掘工期大幅度缩短。
Dagushan's iron mine whose iron ore is in its third fragmentation system is in the construction process, in which the vertical deep-hole blasting technology was adopted to excavate the fragment room.
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.
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