Search

In order to study the long-term mechanical properties of dry hot rocks in thermal reservoir, the time-dependent micromechanical deformation of granite was studied by grid micro-indentation creep test. The results show that the indentation points of granite show obvious creep deformation under constant load. The fractional Maxwell model composed of spring elements and Abel pot in series can describe the time-dependent deformation of granite under constant pressure. The relationship between the micromechanical parameters obtained by grid micro-indentation test and the composition and macro mechanical parameters of granite is not clear, which needs further study. At the same time, as a new quantitative evaluation method of rock micromechanical properties, micro-indentation test technology has a good application prospect in rock mechanical parameters assessment. [ABSTRACT FROM AUTHOR]