鹤岗矿区似大地水准面精化及成果应用

Geoid refinement and application in Hegang mining area

为解决CORS-RTK测绘矿区地面大比例尺地形图和开采沉陷区域日常监测高程测量精度不足的问题,基于鹤岗矿区首级(C级)GNSS控制网静态观测大地高和联测85高程系三等水准成果,结合EGM2008模型的“移去-恢复”组合法,精化矿区似大地水准面模型。结果表明,文中方法得到了鹤岗矿区范围内的高程异常最或是值,使得CORS-RTK施测地面点的高程精度从大于20 cm提高到小于2 cm。该研究成果对这类问题的简单、高效解决具有指导意义,可以拓宽RTK的在矿区地表沉陷监测的应用场景。

This paper discusses the efforts to address the insufficient elevation measurement accuracy in the high-scale topographic mapping of mining areas and daily monitoring of ground subsidence areas by using CORS-RTK surveying.Based on the primary(Class C)GNSS control network static observations of geodetic height in Hegang mining area and the third-order leveling data in the co-surveying 85 elevation system,the study refines the quasi-geoid model of the mining area using the"remove-restore"method for EGM2008 model.The results show that the refined model provides elevation anomaly values in Hegang mining area with the improvement of the elevation accuracy of CORS-RTK surveyed ground pointsfrom over 20 cm to within 2 cm.The proposed study offers a simple and efficient solution to the issues mentioned and expands the application scenarios of RTK in the surface subsidence monitoring in mining areas.