相山铀矿田矿区E级GPS控制网投影变形的探讨

Discussion on the Projection Distortion of E-class GPS Surveying Control Network of Xiangshan Uranium Mine Area

矿区GPS控制网在数据处理过程中,经过了高斯投影必定产生高斯投影变形和高程面归算变形。基于相山铀矿田的GPS网建网工程实例,结合矿区施工控制网的高斯投影变形理论和矿区施工测量的特点,分析其原因及变形程度,对其边长改化具体方法进行比较分析,选择最佳方法对其变换,达到提高矿区平面控制网精度的目的。

In the data processing of mining GPS control network,there must be Gauss projection distortion and deformation of surface elevation imputed since after Gauss Projection.Based on the GPS network building practice of Xiangshan uranium mine area,combining with the theory of Gauss projection distortion and the characteristics of construction survey in mining control network,analyzing the causes and deformation degree,this paper makes a comparative analysis of some specific methods of minimizing the scale error,and selects the optimal method to do a transformation of coordinates,in order to improve the accuracy of the mining horizontal control network.