Evolution of Shear Strength and Permeability during Shear-holding in a Simulated Rock Fracture under Moderate Stress and Room Temperature Condition

摘要

This paper presents direct shear test results for single jointed granite and mortar specimens to investigate effects of long-term load holding on mechanical and hydrological properties of rock joints. From the test results, it was confirmed that shear strength increased and permeability decreased for mortar specimens through three days load holding. For granite specimens, however, significant change was not observed on mechanical and hydrological properties even after the twenty-day load holding, which is likely due to low confining pressure relative to the strength of granite and insufficient load holding period.