半干旱草原浅覆盖区手持钻机化探取样技术的应用及探索

浅层钻探技术是覆盖区化探取样技术研究的新方向。手持钻机是轻便钻机的一种。为了探索手持钻机的化探取样效果，以内蒙古拜仁达坝银铅锌矿区为代表的大兴安岭南部半干旱草原浅覆盖区作为研究区，采用回转式和冲击式手持钻机开展浅钻化探取样试验，分析该方法相对于常规化探方法的优势。结果表明，浅钻化探取样具有方便快捷、效率较高、成本较低等优点。通过对比两类钻机的钻进、取样工艺及效果，分析总结两类钻机对于草原覆盖区不同覆盖物的适用性及存在问题，为覆盖区浅钻化探技术和取样钻机的发展和推广提供借鉴和参考。

Application of the geochemical exploration sampling technology using hand-held sampling drilling tools in semiarid grasslands with thin cover

Shallow drilling is a new direction of geochemical sampling technology in overburden areas, in which hand-held drilling tools are a kind of portable drilling rigs. This paper examines the effect of these tools based on their application to the Bairendaba Ag-Pb-Zn ore deposit of Inner Mongolia in a semiarid grassland with thin cover in the southern Greater Higgnan Mountains. The rotary and percussion hand-held drilling tools were employed to conduct geochemical sampling tests, and the advantages of this technique were analyzed compared with traditional geochemical sampling methods. Results show that this technology has convenience, high efficiency and low cost. By comparison the processes and effects of drilling and sampling of these two tools, their applicability and problems are summarized for grasslands with varied covers, providing a reference for development and popularization of shallow geochemical drilling technology and sampling tools in covered areas.