Application of the combined model in the deformation forecast of Lianziya hazardous rock mountain

The deformation feature and deformation law of Lianziya hazardous rock mountain are introduced, the deformation of the hazardous rock mountain increased with time before the construction of the control project, the deformation velocity of the hazardous rock mountain increased with the strength of the construction during the construction, the deformation velocity of the hazardous rock mountain decreased with time after the construction, and tended to stabilisation. The construction location corresponded to the deformation location in the space, the construction interval of time corresponded to the deformation interval of time, the construction strength corresponded to the deformation velocity to the block slide key projection in the coal layer goaf of the bottom of the hazardous rock body. The combined model is erected by means of some single models. An example of calculation shows that the fitted effect and the forecast effect of the model are better.