本书叙述了用定向孔和分枝孔勘探矿床的方法。提出了钻孔设计线路分类和利用电子计算机设计线路的方法、线路的管理标准和管理方法。叙述了用于钻进分枝孔辅助井筒的钻具和用于定向孔人工造斜的各种定向器的结构,列举了普遍采用的定向钻进方法 This book describes ways to prospect deposits with directional holes and branch holes. The paper presents the classification of drilling design lines and the method of using computer to design lines, the management standards of lines and management methods. Described the structure of the drill used to drill the branch hole auxiliary wellbore and the various directional devices used for the directional hole artificial tilting. The commonly used directional drilling method