Study on Surrounding Rock Deformation Laws of an Argillaceous Soft Rock Roadway Based on the Creep Damage Model

The indexes of argillaceous soft rocks in Western China, such as rock strength and softening coefficient, are much smaller than those commonly seen other areas. Such susceptible to a more serious creep phenomenon if encountering water. Accordingly, the study theoretically constructed constitutive model considering weakening coefficient damage surrounding rocks. Next, viability this was verified by combining numerical simulation field monitoring. conducted comparative analysis on range cross-sectional deformation roadway titled stratum under dry damp states. Results showed that Cvisc applicable decay uniform stage, accelerated stage. During process, were prone viscoelastic deformation. state had an obvious time effect Specifically, expanded at 18 days compared with state, change left upper displacements especially significant. cross-section changed asymmetrically both states, where it into approximate deflected rhombic shape trapezoidal state. Additionally, humid evidently greater