Practice and technical approach of GPS observation of mining-induced ground subsidence

来源期刊：中国有色金属学报(英文版)2005年第z1期

论文作者：GAO Jun-hai WU Li-xin

文章页码：57 - 60

Key words：mining-induced ground subsidence； GPS observation； observation accuracy； reliability

Abstract: The base vector between 2 poins and a high-precision geodetic height difference can be obtained by GPS. If the geodetic height of a point is known, the geodetic height of each observation point in a net can be obtained. When surveying the subsidence value in the mining-induced ground subsidence, the change of the height of monitoring point is needed. On the above theoretical basis, the problem involved in GPS observation of mining-induced ground subsidence and their counter measures were discussed, and an introduction was made that the subsidence value obtained in the monitoring mining-induced ground subsidence can use the change of height of geodetic as a alternative, the result of check on the accuracy and reliability of repetitions observations was analysed. Finally, the effect of errors on accuracy of GPS observation and their reduction measures were elaborated.