Abstract:

In order to compare the effects of different water-rock interactions on the damage and deterioration of filled jointed rock. The longitudinal wave velocity test, static uniaxial compression test and dynamic impact test are carried out on the filled jointed rock under the conditions of dry-wet cycle and continuous immersion. The effects of two different water-rock interactions on the wave velocity value, static and dynamic compressive strength，energy dissipation characteristics of filled jointed rocks are analyzed. Furthermore, the differences are compared in the degradation effects of mechanical parameters of filled jointed rock under different states (dry and water containing) after dry-wet cycle. The results show that, when the number of water-rock interactions is less than 10, the wave velocity of the rock sample under dry-wet cycle is significantly lower than that under continuous immersion. Howerver, with the increase of the water-rock interaction times, the difference in wave velocity values between the two cases is constantly narrowing. With the increase of the number of water-rock interactions, the static compressive strength, dynamic compressive strength and energy dissipation rate of the filled jointed rock decrease. Under 20 dry-wet cycles and continuous immersion, the static compressive strength of filled jointed rock decreased by 27.16% and 18.94%, the dynamic compressive strength decreased by 23.33% and 21.76%, and the energy dissipation rate decreased by 74.29% and 59.71%, respectively. It can be seen that the damage and deterioration of the filled jointed rock caused by the dry-wet cycles is greater than that caused by continuous immersion. In addition, the static compressive strength of the dry state rock sample is higher than that of the water-containing state rock sample after the action of dry-wet cycle, while the dynamic compressive strength of the dry state rock sample is lower than that of the water-containing state rock sample.

Key words: water-rock interaction；filled rock joint')">

water-rock interaction；filled rock joint, dry-wet cycle,
')">continuous immersion；compression characteristic；damage and deterioration effect