Abstract: In order to make up for the shortage of the existing algorithm for mining subsidence by using single epoch and single frequency GPS observation，and realize real-time monitoring of the ground movement caused by coal mining more accurately，based on Tikhonov regularization method and damped LAMBDA method，a new algorithm for mining settlement in real time is proposed.Firstly，according to the characteristics of the single-frequency and single-epoch equation，Tikhonov regularization method is adopted to correct the matrix of the equation to obtain the reliable real-number solutions of ambiguity by the least squares method.Secondly，the integer ambiguity is fixed according to damped LAMBDA method，the damped factor is determined by the initial observation result.Finally，the actual GPS data in mining area is used to conduct experiment so as to test the performance of the algorithm proposed in this paper.The experimental results show that，three directions accuracy of the station is in millimeter-level，and calculating time of single epoch is less than the sampling.The algorithm proposed can satisfy the millimeter-level of observation and observation in real time，and provide a certain reference value for the real-time mining settlement observation.

Key words: Mining settlement, GPS single epoch, Tikhonov regularization method, Damped LAMBDA method, Damping factor