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人们对定向取心感到兴趣,这是由于为了了解地质构造的需要.定向取心方法是在未断根岩心端面上沿径向刻二点痕,或在岩心侧面沿母线刻线痕,与此同时用测斜仪测顶角及方位,由取出的定向岩心再测得真遇层角.根据已知数据即可计算出岩层产状.图1表示取出的定向岩心的可知数据.OO为钻孔轴线,水平截面(由氢氟酸刻痕得出)为椭圆H,其长轴方向即钻孔方向,最低点(图中长轴左端)延线可与轴线垂直圆P交于一点,在P面的射影为OY.层面在岩心上的截痕为椭圆S,其长半轴OX’与OO
People are interested in directional coring because of the need to understand the geological formation. Directional coring methods are to score two marks in the radial direction on the face of the unbroken core or to mark along the side of the core along the same time Measured by inclinometer angle and azimuth, and then removed from the orientation of the core measured true encounter angle. Based on known data to calculate the rock formation. Figure 1 shows the orientation of the core removed from the data .OO drilling Axis, the horizontal section (obtained from the scoring of hydrofluoric acid) is an ellipse H, the long axis direction is the drilling direction, the lowest point (long axis left end) in the drawing can be perpendicular to the axis P, Surface of the projective OY. Cuttings in the core layer of the ellipse S, its long axis OX ’and OO