Numerical Simulation of Zonal Disintegration for Deep Rock Mass under High Geostress

2nd International Symposium on Resource Exploration and Environmental Science

生态环境科学

Gao, Qiang^1 ; Zhang, Qiangyong^1 ; Xiang, Wen^1 ; Zhang, Xutao^2

Geotechnical and Structural Engineering Research Centre, Shandong University, Jinan, China^1

School of Architecture and Engineering, Liaocheng University, Liaocheng, China^2

关键词: Deformation theory of plasticities;    Elasto-plastic damage;    Model test measurements;    Numerical calculation;    Strain energy density;    Strain gradient theory;    Underground engineering;    Zonal disintegration phenomenons;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/170/2/022154/pdf
DOI  :  10.1088/1755-1315/170/2/022154

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

As a common phenomenon of deep underground engineering under high geostress, the generation and evolution of zonal disintegration phenomenon (ZDP) are analyzed by means of numerical simulation. Based on the strain gradient theory and the deformation theory of plasticity, an elastoplastic damage softening model is put forward. In terms of maximum tensile stress criterion and strain energy density failure theory, the element failure criteria have been developed to simulate the failure behavior of rock mass. The zonal disintegration code has been developed by the FORTRAN of ABAQUS. Then it was used to determine the failure pattern of the rock mass around the deep cavern and the quantity and width of the fractured zones also have been obtained. The numerical calculation results are in good agreement with the model test measurements.