我队七五年在锦屏磷矿东山矿区进行补充勘探时，钻孔弯曲度大大超过规范要求。当时虽在防斜治斜方面做了一些工作，但都没有从根本上解决孔斜问题。近两年来，在地质与探矿的密切配合下，根据矿区的地质构造和钻孔弯曲规律，采用“离线移孔”的施工方法，收到了一定效果。现简介如下。 In 1975, our team carried out supplementary exploration in Dongshan Mining Area of ​​Jinping Phosphate Mine, and the drilling curvature greatly exceeded the standard requirements. At that time, although some work was done in the prevention and control of oblique angles, none of them fundamentally solved the problem of inclined holes. In the past two years, with the close cooperation of geology and prospecting, the construction method of “off-line hole-shifting” has been received according to the geological structure of the mining area and the rule of drilling and bending. Now the introduction is as follows.