According to the exploration problems in an open-pit mine, a new drilling method using reverse circulation DTH hammer drill is put forward.
针对露天矿钻探施工中存在的问题，提出了利用贯通式反循环潜孔锤进行施工的新方法。
This image shows another waste pit at a hydro-fracing drill site. Again, we see a waste pit for drilling mud.
这个废料坑位于一处水力压裂钻探场，它再次揭示了对废料坑的再次开采。
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