2) 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。
3) large diameter blasthole rock drilling
大直径深孔凿岩
4) medium-length hole drilling equipment
中深孔凿岩设备
1.
Application of medium-length hole drilling equipment in non-ferrous mines in China;
中深孔凿岩设备在我国有色矿山的应用
5) MLD (Mechanized Longhole Drilling)
机械化深孔凿岩
6) long and medium hole drilling and blasting
中深孔凿岩爆破
1.
According to the mining conditions of inclined,broken orebody with medium thickness and lower grade in Nalin Gold Mine, sill-free sublevel caving method and long and medium hole drilling and blasting were applied in research experiment.
针对广西凤山县那林金矿在倾斜、破碎、中厚、低品位的矿体开采中,试验研究采用无底柱分段崩落采矿法,使用中深孔凿岩爆破。
补充资料：凿印
凿印 刻印的一种方法。指在预制的金属印坯上山凿印文。这类印章的印文错落自然，多数是将军印和颁发给兄弟民族的官印，流行于汉、魏、晋、南北朝之间。相传其起源，因军中官职往往急于任命，印信都是仓促凿成，相沿成习，故别称“急就章”，更为后人所仿效，形成一种刻法。
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