Subarea Description and Breakage Constitutive Model of Rock Mass Based on CT Test

Based on CT experiments of the mechanical behavior a certain sandstone, safety zone, damaging and fracture zone geotechnical materials were defined, threshold standard this was discussed empirically selected. Mathematical morphological image measurement technology used to analyze information each section, variation law sandstone number with loading process conditions studied. According statistical results obtained at stage, statistical-damage variable based equation damage evolution pertinent established. On basis all these data, constitutive model that can reflect divisional damage-fracture constructed. The theoretical stress–strain curve measured well fitted, demonstrating improved could accurately failure partitions. A qualitative analysis scans quantitative combined in experiment, which has reference value for development engineering experiments.