부산대학교 도서관

Under the condition of complex engineering geological environment, rock is very easy to receive the reciprocating action of water and temperature. Therefore, uniaxial compression test and acoustic emission test were carried out on phyllite samples after 1, 3, 5, 8, and 11 cycles of temperature cycle natural cooling (T-N), temperature cycle cold water cooling (T-W), and dry–wet cycle (D-W), and the deterioration law of physical and mechanical properties of phyllite under the influence of water and temperature were analyzed. The results show that (1) under the action of T-N, the mass of phyllite decreases continuously, while under the other two conditions, the mass increases gradually due to the water absorption characteristics of phyllite fissures. (2) With the increase of the number of temperature cycles(T), the brittle failure characteristics in the phyllite gradually disappear, showing progressive failure characteristics, while under the condition of D-W, the brittle failure characteristics are more obvious. (3) Under the condition of water and temperature, the macroscopic failure modes of phyllite mainly include two kinds: the composite failure of shear and longitudinal tension and the shear failure of the cross-bedding plane. (4) The single factor of water and temperature will lead to the deterioration of the mechanical properties of phyllite, and the sample is more likely to break. Under the coupling effect of water temperature, this phenomenon is more significant.