基于GPS大地高的抚顺西露天矿南帮滑坡垂直位移监测分析

Analysis of Vertical Displacement Monitoring for South Landslide of West Fushun Open Pit Mine Based on GPS Geodetic Height

抚顺西露天矿南帮滑坡危险区面积达3.68 km^2,处于持续变形滑移阶段,直接威胁周边居民的生命及生产安全,及时准确地掌握地质灾害变化趋势显得尤为重要,主要手段就是对其形变进行长期跟踪监测。为此,文章介绍了GPS大地高用于垂直位移监测的理论方法,通过对影响基线解算质量因素的分析,得出采用适当的基准网及解算软件,可求得监测点的大地高,且高程中误差精度能达到5 mm的结论。实践证明,该方法可替代精密水准测量进行滑坡垂直位移监测。

The danger areas of the south landslide in west Fushun open-pit mine of 3.68 km2 ,are still in the deform-ation slip stage, and directly threaten the security of life and production of surrounding residents. So it is very important to grasp the change trend of geological disasters in a timely and accurate manner. The main method is to monitor the deform-ation for a long time. Therefore, this paper introduces a theory method of monitoring of vertical displacement with GPS ge-odetic height. Through analysis of the influencing factors for baseline solution quality, the conclusion is that we can obtain the geodetic height of monitoring points with a precision of 5 mm by means of the appropriate reference network and solu-tion software. Practices have proved that this method can be used to replace the precise leveling to monitor the vertical displacement of landslide.