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论文类型：会议论文

发表时间：2006-01-01

收录刊物：CPCI-S

页面范围：589-+

关键字：Deep Rock Mass; Circular Roadway; Loose Rock Zone; Numerical Simulation

摘要：Based on the heterogeneity of rock, by introducing the constitutive model based on damage mechanics and statistical theory and using the RFPA2D, the deformation and nonlinear gradual failure characteristics of circular roadway in deep rock mass as well as the displacement and the stress variation of the key position in the periphery of the roadway were analyzed, meanwhile, the mechanism of loose rock zone in the surrounding rock of the circular roadway was also studied. The study indicates that the stress concentration occurs in the periphery of the roadway after evacuation and plastic deformation zone engenders under the persisting stress of the surrounding rock, then the cracks appears and expands continuously, the loose fraction zone (loose rock zone) appears at last and the intensity of the stress concentration decreases as well as the stress field shifts beyond. This study is very useful and significant both on the theoretical and practical aspect.