To study the heat transfer laws inside rock during the freeze-thaw process, the temperature of rock-like sample was first monitored in the study. Based on the thermal parameters at different temperatures, an apparent heat capacity model was established. Meanwhile, the heat conduction relaxation and temperature variation laws were simulated and discussed. Results indicate that the heat conduction relaxation in rock could be obviously observed during the freezing and thawing process. The temperature variation curves of saturated rock could be markedly divided into three sections. In addition, the heat conduction relaxation section could be well simulated using the apparent heat capacity model. Taking into account the heat conduction relaxation, a method to simulate the temperature field during freeze-thaw cycle was proposed. The simulation results agreed well with the measured results.
Journal of Mining & Safety Engineering
heat conduction relaxation
apparent heat capacity