1) large diameter blasthole rock drilling
大直径深孔凿岩
3) deep-hole with large diameter
大直径深孔
1.
According to the material properties and machinability of oxygen-free copper,an experiment of the trepanning machining of deep-hole with large diameter on oxygen-free copper was carried out,and the trepanning drill and the trepanning process were designed.
根据无氧铜的材料特性和切削加工性能,进行了无氧铜的大直径深孔套料加工试验,并设计了套料钻和加工工艺。
4) mid-deep borehole drilling
中深孔凿岩
1.
According to the actual situation of a Mo mine which will employ multi-stage mining and the occurrence morphology of orebody which is deep and large,the paper introduces sublevel stoping mining method drilled by mid-deep borehole drilling machine and loaded by electric-rake.
针对某钼矿分期开采的实际情况以及矿体的厚大特征,选用中深孔凿岩、电耙出矿的分段凿岩阶段矿房法进行开采,有效地提高了矿块生产能力。
6) large-diameter longhole mining
大直径深孔采矿
1.
Then the large-diameter longhole mining project which was employed in Tonglushan Copper-iron Mine is taken as an example.
大直径深孔采矿法因为其高效率、低成本、安全性好在矿山得到了广泛的应用。
2.
The first use of 120m high-level large-diameter longhole mining in Anqing copper mine was made in china.
安庆铜矿在国内首次试验应用120m的高阶段大直径深孔采矿法,为保证回采安全,对采场稳定性及地压活动进行了长期监测和分析研究,取得了丰富的监测研究成果,取得的成果对该采矿法的成功应用具有重要的实际意义。
补充资料：研凿
1.犹钻研。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条