矿区地表沉陷监测中RTK代替四等水准的可行性分析

针对矿区地表沉陷监测工作中四等水准测量耗时耗力的问题，从RTK测量精度以及测量误差对地表沉陷预计参数的影响程度的角度，探讨了RTK在矿区地表沉陷监测工作中代替四等水准的可行性。研究得出:RTK的高程精度约为20 mm，不满足开采沉陷10 mm的精度要求，不能直接代替四等水准进行沉陷监测工作；通过正交设计对概率积分参数敏感性分析得到，下沉系数q属于敏感因子，开采影响传播角θ属于最不敏感因子，主要影响角正切tan β影响介于两者之间；通过在下沉值中加入中误差分别为10，20，30 mm的随机误差，反演参数值，分析测量误差对参数的影响，结果显示RTK误差对预计参数的影响不足6%，此时RTK误差对预计参数的影响较小，求参结果可靠。结果表明，RTK可用于地表预计参数工作的进行，对地表沉陷预计参数求取的后续工作有指导性意义。

Feasibility analysis of RTK replacing four-level in monitoring of surface subsidence in mining area

In view of the time-consuming and labor-intensive problem of four-level leveling in the monitoring of surface subsidence in mining area，from the perspective of the accuracy of RTK measurement and the influence of measurement error on the predicted parameters of surface subsidence，the RTK was used to replace the fourth-class level in the monitoring of surface subsidence in mining area.Feasibility.The study shows that the elevation accuracy of RTK was about 20 mm，which did not meet the accuracy requirement of mining subsidence of 10 mm.It can not directly replace the fourth-level level for subsidence monitoring.The sensitivity analysis of probability integral parameters was obtained by orthogonal design，and the sinking coefficient was obtained. q was a sensitive factor，and the mining propagation angle θ was the least sensitive factor，mainly affecting the tangent tan β effect between the two；by adding the medium error in the sinking value was 10，20，30 mm Random error，inversion of parameter values，analysis of the influence of measurement error on parameters，the results show that RTK error is expected to participate.