Abstract: A study on anchorage control for dynamic failure of rock under high strain rates was conducted using a self-developed variable-section bolt to anchor rock specimens. Impact tests were then performed on the anchored specimens using a split Hopkinson pressure bar to investigate the effects of the number of bolts and anchoring angles on the mechanical properties and failure modes of the rock. The study aimed to reveal the anchorage resistance mechanism of rock masses under high strain rates and propose reasonable suggestions for anchoring support design in related engineering applications. The results showed that: (1)As the anchoring angle increased from 0°to 90°and the number of bolts increased from one to three,the peak stress,dynamic compressive strength,and elastic modulus of the anchored rock initially increased and then decreased.(2)With increasing anchoring angle and number of bolts,the eigenvalue of the average particle size of the specimens first increased and then decreased. The maximum eigenvalue of the average particle size occurred at an anchoring angle of 60°with two bolts,indicating higher fragmentation. Larger specimens experienced less fragmentation,with their integrity being optimally preserved.(3)When the anchoring angle was 60°and two bolts were used,the bolts fully exerted their anchoring effect,effectively controlling the propagation speed of cracks in the anchored rock.