摘要
矿山变形监测是矿山安全开采与可持续发展的重要组成部分。文章基于精密单点定位(Precise Point Positioning,PPP)技术,利用矿区实地采集的高频GPS观测数据,以静态相对定位结果作为参考,分析在矿山复杂多路径环境下的PPP定位精度。研究结果表明,在卫星数量足够(>6)和几何精度因子较好的情况下,基于静态PPP定位技术,观测1h以上的时间就可以获得水平毫米级、垂直约1cm的定位精度;而动态PPP定位目前还只能获得厘米级的定位精度,还不足以用于毫米级的高精度变形监测。因此观测时间2h以上的静态PPP定位可满足毫米级矿山变形监测的精度要求。
Mining deformation monitoring is an important component in mining safety and sustainable development. In this paper, based on Precise Point Positioning （PPP） technology, using the static relative positioning results as reference, the high-frequency GNSS observation data collected in mining field was used to analyze the PPP accuracy at the mine complex multipath environments. The results showed that, under the conditions of a sufficient number of satellites （~ 6） and preferred GDOP, the horizontal positioning accuracy of s^atic PPP could achieve millimeter level, and the vertical positioning accuracy would be about lcm level, with 1 hour or more observation time. While the positioning accuracy of kinematic PPP would reach centimeter level in each direction, which was not enough for deformation monitoring. In conclusion, the static PPP could meet the millimeter-level precision requirements of the mining deformation monitoring with two hours or more observation time.
出处
《测绘科学》
CSCD
北大核心
2014年第6期70-73,111,共5页
Science of Surveying and Mapping
基金
国家自然科学基金项目(41304029
41204034)
湖南省教育厅科学研究项目(12C0105)
湖南省科技计划项目(2012FJ4271)
大地测量与地球动力学国家重点实验室基金(SKLGED2014-5-3-E)
关键词
精密单点定位
矿山
变形监测
卫星钟差
Precise Point Positioning
mine
deformation monitoring
satellite clock bias
