基于抗差估计的变形监测基准网坐标系统转换

Coordinate system transformation for deformation monitoring datum network based on robust estimation

为监测地下煤炭开采对某矿工业广场内主、副井筒的影响,布设了由10个点构成的GPS基准网,从而为由54个监测点构成的井筒监测网提供在矿区坐标系统下的变形分析基准;在求解坐标转换参数时,为克服转换基准点中存在的位移对求参的影响,提出了采用抗差估计理论求参的模型及数据处理流程,并建立转换后GPS网的质量评价模型。根据对GPS基准网的处理结果,采用抗差估计求参,有利于保留GPS技术高精度的特点。

In order to monitor the effect of underground coal mining on the main and auxiliary wells in the industry square,the GPS datum network composed of 10 points is established to provide deformation analysis datum under coordinate system in mine area for well monitoring network composed of 54 monitoring points.When the coordinate transformation parameters are solved,in order to eliminate the impact of the displacements existing in the transformation reference points,the robust estimation model and data processing flows are introduced.The quality evaluation model for transformed GPS network is also established.According to the processed results of the GPS datum network,the robust estimation model of solving transformation parameters is favorable for reserving the high precision characteristics of GPS technology.