该文介绍了在青岛市城市地质调查项目中，在充分利用已有地质资料以及多种物探解译成果的基础上，创新性地采用定向钻探技术，以有限的钻探进尺精准、完整地穿透沧口断裂带。在钻孔内明显揭露沧口断裂带处，利用多种岩矿测试手段，结合矿物学和显微组构特征，查明了沧口断裂的产状要素及岩体特征;同时引入全孔壁数字成像技术，不仅进一步判定和确认断裂带内的岩性和岩体破碎程度等信息，而且对断裂带内岩体产状进行原位测量，成功解决了钻探方法无法准确揭露断裂和地层结构面产状，以及因岩体破碎取芯率偏低而导致重要地质信息缺失等难题;最终解决了传统垂直钻探技术穿透高倾角、大宽度断裂带的难题，为工作区域内重大工程规划建设提供了地质依据。

In the urban geological survey project of Qingdao City,basad on the full utilization of existing geological data and various geophysical exploration and interpretation achievements,directional drilling technology is innovationally adopted to accurately and completely penetrate the Cangkou Fault Zone with limited drilling footage. At the exposed section of Cangkou Fault Zone in the bolehole,using a variety of rock and mineral testing methods combined with mineralogical and microstructural characteristics,the occurrence factors and rock mass characteristics of the Cangkou Fault Zone are identified. At the same time,a full-bolehole digital imaging technology is introduced,not only to further determine and confirm the lithology and rock mass in the fault zone,but also to conduct the in-situ measurement of the rock mass occurrence. This successfully solves the problems that the drilling method cannot accurately reveal the occurrence of the fault and stratigraphic structural planes,and the lack of important geological information due to the low core recovery rate due to rock mass fragmentation. Finally,the limitations of traditional vertical drilling techniques in penetrating the high-inclination and large-width fault zone are solved,providing geological support for the planning and construction of major projects in the work area.