超千米深孔
borehole deeper than 1000m
大区深孔台阶爆破
large deep hole bench blasting
大直径深孔
deep-hole with large diameter
big-deep holes
big-diameter deep-hole
large diameter longhole
大直径深孔爆破
large diameter deep hole blasting
大直径深孔采矿
Large diaamneter longhole mining
large-diameter longhole mining
大直径深孔采矿法
Large diameter longhole mining method
Large diameter longhole mining
大直径深孔阶段矿房法
large-diameter deep-hole mining by sublevel room work method
大直径深孔凿岩
Large diameter long-hole drilling
分层台阶深孔开采
sublevel long hole benching
分段中深孔
Segmentation medium-length hole
高阶段大直径深孔采矿
large diameter deep hole mining of high stage
高阶段大直径深孔采矿法
high sublevel
large diameter and long hole stoping method
井下深孔爆破
Underground Deep-hole Blasting