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。

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It is very important to measure the volume change of mud in mud pit for the safe drilling, the control of well blowout and the lost of circulation.

测量泥浆池中泥浆体积的变化对于安全钻井，控制井涌、井漏具有十分重要的意义。

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