Influence of temperature and load on creep characteristics of soft rock similar materials

Abstract

The soft rock specimens were prepared by using similar materials. The uniaxial creep experiments were carried out on the soft rock specimens under different temperatures and loads. The influence of temperature and load on the creep of similar soft rock and the empirical equation were obtained. The results show that the stressstrain curve is basically linear at normal temperature. As the temperature increases, the stress-strain curve continually shifts upward. As the temperature increases and the creep time increases, the average creep modulus of similar materials in soft rock decreases. As the axial pressure increases, the creep strain deformation increases continuously, and the larger the axial pressure, the more significant the creep strain changes. Through the analysis of the creep curve law, the empirical equations of three types of creep curves are given.