Micro-crack Damage Evolution of Fracturing Rock Chaotic Characteristics

Chaotic theory and bifurcation of modern nonlinear science were used to study the evolution of micro-cracks under the hydraulic fracturing of the rock mass characteristics, the tensor damage variable which described the chao evolution of micro-cracks and microstructure of rock were defined, the Logistic model of localization bifurcation of intrinsic fracturer rock was built, bifurcation point of chaotic evolution of micro-cracks, bifurcation the number of crack patterns and different degree of sub-branch off were calculated. practical research block was Select, results of theoretical calculation and finite element software simulation showed: Theoretical calculation is occur, and credible.