deep-hole blasting

• 深孔爆破

deep-hole blasting的用法和样例：

例句

1. Large-diameter longhole blasting was used to excavate soil-rock in some engineering project.
   某工程的土石方开挖采用大直径深孔爆破方式。
2. The new method adopted roof presupporting,deep and medium hole blasting,LHD ore removal and tailings filling.
   该采矿方法采用采场预控顶技术，中深孔爆破，铲运机出矿，尾砂充填。