Rheological characteristic which have a direct influence on the stability of surrounding rock engineering under complex geological conditions is the results of geological structure evolution. Modern supporting theory considers that suitable internal energy release of surrounding rock can be good to make full use of the self-bearing capacity of rock mass. Therefore, how to release suitable displacement and control the deformation rate in stable range are the key problems relating to the realization of secondary support. Such methods combined by test and field monitoring and theoretical analysis were adopted in this paper to do the systemic research on the rock mass from micro structure to macro deformation, rheological model of JinChuan rock mass was established to discuss the reasonable supporting time. Results show that support after suitable stress and displacement release can benefit for the long term stability of surrounding rock.

The methods combined by test, field monitoring and theoretical analysis were adopted to do the systemic research on the rock mass from microstructure to macrodeformation, and rheological model of Jinchuan rock mass was established to discuss the reasonable supporting time. Results show that supporting after suitable stress and displacement release can benefit for the longterm stability of surrounding rock.