Abstract:The deformation behavior and the application of chaotic method for the stability analysis of the rock mass engineering in depth are summarized. For the measured displacement time series of rock mass engineering,the procedure for calculating the largest Lyapunov exponent is given on basis of phase space reconstruction. Linear and nonlinear chaotic prediction methods are represented for the rock mass displacement. Thus,the chaotic analytic method is set up for the prediction of the measured displacement time series of rock mass engineering. The analysis of the 255 m main transport roadway damaged in Linglong gold mine is considered as an example. At first,the damaged situations of the 255 m main transport roadways are simply presented. Then,for the measured convergent displacement time series of the 255 m main transport roadway,the interpolation method is adopted;and an equal interval displacement time series is obtained. The results show that the largest Lyapunov exponent is 0.05 based on phase space reconstruction. Finally,it is separately predicted by the method of equidistance in near neighbor and that of the largest Lyapunov exponent prediction,and the predicted displacement values are ideal compared with the measured displacement values.