Study on Creep Failure Characteristics of Jointed Soft Rock
Hongbao Zhao, Huhu Wan, Shaoqiang Liu, Hui Cheng, Chaonan Chen
School of Energy and Mining Engineering, China University of Mining and Technology-Beijing, Beijing, China
Keywords: Soft rock, joint, shear creep, discrete element method
Abstract
The shear creep failure mechanism of jointed soft rocks is a critical issue in geotechnical engineering. Using the discrete element method, a numerical model of jointed soft rocks was constructed to simulate shear creep under varying joint roughness, normal stress and shear directions. The effects of multiple factors on the creep deformation of soft rocks were then analyzed. Results indicate that the amount of creep deformation in soft rocks significantly decreases with an increase in joint roughness and with an increase in normal stress. However, the influence of shear direction on creep deformation is relatively minor. This study lays a foundation for further research into the creep behavior of soft rocks.
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