钻孔的投影计算一般常采用垂向投影或走向投影法,而用此方法却存在下列问题, 1)钻孔止点投影到勘探线剖面上的位置误差,随着勘探线方向与岩层倾向夹角θ的增大而迅速增大。 2)若倾斜岩层的构造改变或θ≈90°时,就很难正确地投影。 3)投影方法太繁琐。 为此,许多人都在这方面作了些探讨。 The projection of the borehole usually adopts the vertical projection or the projection to the projection method. However, the following problems exist in this method: 1) the position error of the projection of the drilling point to the profile of the exploration line, as the direction of the exploration line and the inclination of the formation The angle θ increases rapidly increasing. 2) If the structure of the inclined rock formation changes or θ ≈ 90 °, it is difficult to project correctly. 3) projection method is too complicated. To this end, many people have made some discussions in this regard.