Abstract：With the advancement of underground engineering to greater depths and the continuous increase in mining intensity, the prevention and control of dynamic disasters, such as rockbursts and coal bumps, have become critical safety issues necessitating urgent solutions. To address the deficiencies of conventional support structures in energy absorption efficiency, deformation capacity, and impact resistance, a steel pipe shrinkable energy-absorbing cable, based on the principle of plastic deformation of steel pipes, was developed. Systematic comparative drop-weight impact tests were conducted using a self-designed impact-shear testing device, which included conventional cables as well as 160 kN and 350 kN energy-absorbing cables. Full-scale anchored rock mass specimens were utilized to investigate the effects of impact energy and frequency on the impact-shear resistance characteristics. The test results demonstrate that: (1) The rock mass reinforced with the 160 kN energy-absorbing cable was able to withstand an impact energy of 103 kJ without failure, as its constant resistor effectively absorbed energy through plastic deformation; (2) Compared to conventional cables, the energy- absorbing cables exhibited longer impact durations and smaller fluctuation ranges of impact force; (3) Under multiple consecutive impacts, the constant resistor maintained stable yielding deformation and constant resistance. The steel pipe shrinkable energy-absorbing cable exhibits excellent impact-shear resistance characteristics, providing reliable technical support for dynamic disaster prevention in deep engineering projects.
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2025, Vol. 44 
