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岩体结构面产状是影响岩体力学性质及工程稳定性的重要地质因素.从钻孔孔壁电视平展图上可较精确地提取结构面迹线上不共线三点的相对二维坐标(d,h),再利用空间解析几何理论确定其三维空间相对坐标(x,y,z),并求得结构面法向矢量.根据钻孔孔壁与坡面及结构面产状的空间几何关系,在保持原点不变的情况下,采用空间坐标变换的方法,将三维坐标系z轴和y轴分别转化为竖直方向z′和正北地理方向y′,并确定转化后坐标系空间的结构面法向矢量.再从结构面产状的定义出发,根据结构面法向矢量与结构面倾向、倾角的相关性,建立了一个空间几何模型,通过该模型可求得任意平直坡面上任一钻孔内局部岩体结构面的产状.
The occurrence of rockmass structure surface is an important geological factor that affects the mechanical properties of rockmass and engineering stability.From the flat-screen television picture of borehole wall, the relative two-dimensional coordinates (d, h), and then determine the relative coordinates (x, y, z) of the three-dimensional space using the spatial analysis geometry theory and obtain the normal vector of the structural plane.According to the hole-hole wall and the slope and the space Geometry relations, while maintaining the same origin, using the method of spatial coordinate transformation, the three-dimensional coordinate system z-axis and y-axis are transformed into the vertical direction z ’and the north geography direction y’, and the transformed coordinate space Then, based on the definition of structure surface, a spatial geometric model is established based on the correlation between the normal vector of structure surface and the dip and dip of structure plane. By this model, any flat slope The appearance of the local rock mass surface within any borehole on the surface.