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作者制定了粗显裂隙的定量比较法,以严格的数学结论为基础。因为比较褶皺区各种沉积岩裂隙系的方位时,要求消除岩层倾角的影响,并且要求选择一定的坐标予以确定裂隙面与岩层产状要素的相对位置,所以,必须把岩层想象成水平状态的。为了解决这个问题,本文提出了包括两类极射赤平投影网(极网和赤道网)的综合网,借其可以加快图解的过程。只有消除了露头面方位的影响,并且选定了一定体积的岩石(与岩层的产状要素有相应的相对方位),才可能在将岩层化为水平状态后对各系裂隙进行定量比较,并计算其全部组合,所谓一定体积的岩石,是指“定向”立方体,其上面与层理面一致,而两个侧面则分别通过岩层的走向线和倾向线。统计切过定向立方体的裂隙数量时,必须引入露头面方位的校正值,其原因是露头面与岩层面不垂直;(2)露头面与“定
The authors developed a quantitative comparison of rough cracks, based on rigorous mathematical findings. It is necessary to imagine the rock formation as horizontal when comparing the orientation of various sedimentary rock fracture systems in the fold zone to eliminate the influence of rock dip and require a certain degree of coordinate to determine the relative position of the fracture surface to the rock mass. In order to solve this problem, this paper presents a comprehensive network that includes two types of polar projection stereographic projection networks (polar and equatorial), by which the process of illustration can be expedited. Only by eliminating the influence of outcrops and the selection of a certain volume of rock (corresponding to the origin element of the rock formation), is it possible to compare the fissures of the various strata after the rock formation has been made horizontal All combinations are calculated. The so-called volume-specific rock refers to a “directional” cube whose upper surface coincides with the bedding plane and the two sides pass respectively the strike and dip directions of the formation. When calculating the number of cracks in directional cube, the correction value of outcrop azimuth must be introduced because the outcrop surface is not perpendicular to the rock plane. (2)