Abstract:Deformations and damages of coal have intrinsic relativity with dynamic destabilization. The experiment on large size coal progressive fracture is a fundamental way to analyze the crack and evolution process of surrounding rock in the mined-out area. By in-situ comprehensive investigation and the well-chosen coal specimens of different sizes from the Western Huating Coal Mine where serious mining-induced seismicity occurs,based on the uniaxial test of some columnar and simple coal specimens,the acoustic emission(AE) characteristic experiments of two cube specimens of large size with different structures and heterogeneity(parallel and vertical lamination,the dimensions are 195.0 mm×110.0 mm×206 mm,195.0 mm×195.0 mm×11.5 mm respectively),are conducted under different loading models,and abundant information and parameters upon deformation and their evolution are acquired. The corresponding statistical physical parameter(state vector),which characterizes the continuous rough particle and spatial field is adopted in order to describe cracks and damages process of the coal media and their damage degree quantitatively. Furthermore,the damage degree percent is proposed as a quantitative index to characterize local damage and concentration of fractures. Finally,the comparative analysis between stress-strain and AE progressive characteristics are obtained. An essential qualification is provided to theoretical analysis,numerical simulation so as to enhance the accuracy of temporal-spatial-relationship and intensity of dynamical unstable and safe mining prediction.