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采用协克里金法处理重力或重力梯度数据反演地下3D密度时,岩脉倾角的先验信息是否合理决定了反演结果的好坏。为了使协克里金法在先验信息不充足时也能得到理想的反演效果,我们提出角度扫描的方法来获取岩脉倾角信息:在保持其他反演参数不变的前提下,假设模型的倾斜角度未知,每次引入不同角度进行协克里金反演,再根据先验信息剔除不合理密度值,得到密度分布;统计预测数据与测量数据拟合残差的标准差,根据极小值对应的角度估计岩脉的倾角。本文基于4种不同倾斜角度(0o,45o,90o,135o)岩脉模型的重力梯度垂直分量Tzz验证方法有效性,都能够准确地估计出岩脉倾斜角度。这使得协克里金法在岩脉倾角未知的情况下,也能得到较好的反演结果。
When the co-Kriging method is used to process gravity or gravity gradient data to invert the 3D underground density, the priori information of the dyke inclination determines the inversion result well or not. In order to make the Octikry method obtain the ideal inversion result even when the a priori information is not sufficient, we propose a method of angle scanning to obtain the dips information: while keeping the other inversion parameters unchanged, we assume that the model Of the tilt angle is unknown, each introduction of different angles for the Kirk Gold inverse, and then remove the irrational density value based on prior information to obtain the density distribution; statistical prediction data and the measured data to fit the standard deviation of the residual, according to the minimum The angle corresponding to the value estimates the dipping angle of the dike. In this paper, we validate the validity of the method based on the vertical component of gravitational gradient (Tzz) for four types of rockeries with different tilt angles (0o, 45o, 90o, 135o), and accurately estimate the dike angle. This makes the Xie Klik gold method in the case of dips unknown angle, but also get better inversion results.