Elastic-Plastic-Brittle Unified Solution of Surrounding Rocks in Deep Openings
The surrounding rocks in deep openings are deformed too large and fractured frequently during excavation process. Taking the circular tunnel as the research object, surrounding rocks are divided into the cracked region, the plastic region and the elastic region. Based on the plane strain condition and twin shear strength theory, the analytical solutions for the stress and displacement are derived and the individual region radii are obtained. The strengthening effect of the intermediate principal stress on rock stress and the effect of elastic modulus deterioration on rock mass deformation are discussed with examples. Finally, some new conclusion has obtained, which provide meaningful theoretical foundations for reinforcement of tunnel project.
deep circular opening surrounding rocks twin shear strength theory elastic-plastic-brittle analysis analytical solution
Wei Jianjun Jiang Binsong Zhang Qiang
State Key Laboratory for Geomechanics and Deep Underground Engineering, School of Mechanics and Civi State Key Laboratory for Geomechanics and Deep Underground Engineering, School of Mechanics and Civi
国际会议
The First International Symposium on Mine Safety Science and Engineering (首届矿山安全科学与工程学术会议)
北京
英文
1346-1354
2011-10-27（万方平台首次上网日期，不代表论文的发表时间）