Abstract: To obtain spatio-temporal evolution rule of deformation and fracture in the rock under high pressure stress, set in a deep roadway of Pingdingshan Coal Mining Group, physical and numerical simulation of excavation process has been performed by using transparent rock-similar materials and three-dimensional particle flow code software called PFC3D. The evolution rule of deformation and fracture in the rock changing with excavation process has been acquired. On this basis, supporting measures of deep circular roadway have been put forward. Research results are as follows: 1) The experimental method of transparent rock in this paper can effectively obtain the spatio-temporal evolution law of the internal deformation and cracking in deep rock mass. 2) Rock radial y-displacement at the roof and floor of model roadway decreases in an exponential relationship with the distance x from the roadway surface; after excavating, the deformation of surrounding rock grows fastest within one or two hours, and the deformation keeps basically stable two hours later without further excavation. 3) Rocks at the roof and floor of roadway don’t break after excavation, while shearing slippage fracture of rocks at the two sides appears in the hance and gradually expands into great depth in the direction of roof and floor with the passage of time.

Key words: transparent rock, digital photography, PFC3D, deformation and fracture