该项中的钻探工人操作移动钻孔机实施露天矿和采石场的钻孔爆破以及建筑工地的建筑物基础设施的爆破工作。
Drillers in this unit group operate mobile drilling machines to bore blast holes in open-pit mines and quarries and to bore holes for blasting and for building foundations at construction sites.
结合露天采石场的具体情况，以古井祥业石场山坡型露天矿为例，介绍了基于陡帮开采的切壁开采方法。
In view of special conditions in quarry the paper takes Gujingxiang side-hill quarry as an example, introducing cutting wall mining method based on mining with steeper working slope.
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