Study on dynamic characteristics and energy dissipation of frozen rock with ice-containing structural plane

To study the dynamic characteristics and energy dissipation law of ice containing fractured rocks under low temperature (−10, −20 ℃) conditions, a split Hopkinson pressure bar (SHPB) was used to conduct uniaxial impact failure tests on low-temperature ice containing fractured rocks under different loading strain rates; the propagation and attenuation characteristics of stress waves in ice-rock structural plane, dynamic response characteristics of frozen rock with ice-rock structural plane, energy dissipation mechanism and failure mechanism are studied to provide reference for the freezing parameter design of water-rich fractured rock. The test results showed that under different impact rates, the dynamic characteristics and energy dissipation per unit volume of frozen rocks with ice-containing structural planes had a significant strain rate effect. The stress-strain curve showed a three-stage trend, and the dynamic compressive strength and peak strain showed strong strain rate effect; as the strain rate increases, the incident energy, reflected energy, and dissipated energy all increase significantly.