Some problems of GPS RTK technique application to mining subsidence monitoring  

作　　者：Liu Chao Zhou Feng Gao Jingxiang Wang Jian 

机构地区：[1]Key Laboratory of Land Environment&Disaster Monitoring of SBSM,China University of Mining&Technology,Xuzhou 221116,China [2]School of Environment&Spatial Informatics,Chino University of Mining&Technology,Xuzhou 221116,Chino

出　　处：《International Journal of Mining Science and Technology》2012年第2期223-228,共6页矿业科学技术学报（英文版）

基　　金：sponsored by the National Natural Science Foundation of China (Nos.41074010, 41104005 and 40904004);the Scientific Research Foundation of Key Laboratory for Land Environment and Disaster Monitoring of SBSM (Nos.LEDM2010B12 and LEDM2009A01) ;the Jiangsu Qinglan Project

摘　　要：Owing to the variability of mine surfaces, it is difficult to obtain the deformation monitoring data of the observation stations by traditional leveling technique. GPS RTK （Real-Time Kinematic） technique was employed to the subsidence observation in this paper, and its main sources of errors including rover pole deflection of the vertical, un-modeled systematic errors （gross error, multipath delay etc.） and the height transformation error, were analyzed systematically. Based on the fundamental theories of spherical fit- ting and Empirical Mode Decomposition （EMD）, the error reduction models were studied exhaustively. And two experiments were done in different environment to test the proposed models. The results show that the proposed methods can achieve a fourth-grade leveling accuracy, with （Root-Mean-Square） RMS in three orthogonal directions （N, E and H） of 4.1, 3.3 and 3.1 ram, respectively, by 3-5 rain continuous shaking of the observation GPS antenna, fully satisfying for mine surface subsidence deformation monitoring.Owing to the variability of mine surfaces,it is difficult to obtain the deformation monitoring data of the observation stations by traditional leveling technique.GPS RTK(Real-Time Kinematic) technique was employed to the subsidence observation in this paper,and its main sources of errors including rover pole deflection of the vertical,un-modeled systematic errors(gross error,multipath delay etc.) and the height transformation error,were analyzed systematically.Based on the fundamental theories of spherical fitting and Empirical Mode Decomposition(EMD),the error reduction models were studied exhaustively.And two experiments were done in different environment to test the proposed models.The results show that the proposed methods can achieve a fourth-grade leveling accuracy,with(Root-Mean-Square) RMS in three orthogonal directions(N,E and H) of 4.1,3.3 and 3.1 mm,respectively,by 3-5 min continuous shaking of the observation GPS antenna,fully satisfying for mine surface subsidence deformation monitoring.

关 键 词：GPS RTKSurface subsidenceKinematic positioningMultipath delay 

分 类 号：P228.4[天文地球—大地测量学与测量工程] V243.4[天文地球—测绘科学与技术]