工程地质钻探技术研究
【摘 要】工程地质钻孔的直径应根据工程要求、地质条件再结合钻探方法、钻探设备予以综合确定。为了划分地层而进行的钻孔，钻孔直径一般不宜小于33mm；为采取原状土样而进行的钻孔，孔径大小不宜小于108mm；为采取岩芯试样的钻孔，对于软质岩石其直径不宜小于108mm，对于硬质岩石其直径不宜小于89mm。常见的钻探方法有很多种，根据破碎岩土的方法可分为：冲击钻探、回转钻探、冲击回转钻探、振动钻探等。常用的地质钻探设备主要包括动力机、钻机、泥浆泵、钻杆和钻头等。本文就根据自身工作经验，针对地质钻探技术的相关要点进行详细阐述。
【关键词】地质钻探；钻进技术；钻孔
Engineering geology drilling technology
Zou Yan-hui
（Jiangxi Geology and Mineral Exploration and Development Bureau 901 Geological Brigade Pingxiang Jiangxi 337000）
【Abstract】Engineering geology drilling diameter should be based on engineering requirements， geological conditions combined drilling method， drilling equipment shall be determined comprehensively. Drilling carried out in order to divide the formation， the hole diameter is generally not less than 33mm； drilling to take undisturbed soil samples carried out， the pore size of not less than 108mm； to take samples of drill core， for soft rock with a diameter not less than 108mm， to hard rock with a diameter not less than 89mm. There are many common drilling methods， depending on the broken rock and soil can be divided into： the impact of drilling， rotary drilling， rotary drilling shock， vibration drilling. Common geological drilling equipment including power machine， drilling rig， mud pump， drill and drill and so on. In this paper， based on their experience relevant points for geolog
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