Active support technology of high-impact toughness bolts(cables)

YANG Chao; FU Yukai; DONG Yadong; LI Peng; REN Jie

doi:10.11799/ce202504006

Abstract：To address critical challenges in rockburst-prone roadways,including severe surrounding rock deformation,structural damage,and insufficient support strength,we investigated stress wave propagation mechanisms and proposed an innovative synergistic anti-impact system integrating high-impact toughness bolts and high-strength cables.Based on the engineering background of the No.30207 ventilation roadway of Mudu Chaideng Mine,the high-impact toughness anchor(cable)support were designed from the supporting materials and supporting body structure,and applied in the roadway.On-site monitoring revealed significant deformation control effect,demonstrated by the floor heave(400 mm)and sidewall convergence(300 mm)during excavation.Post-installation mechanical response exhibited distinct stabilization patterns:roof bolts and cables stabilized at 170 kN and 150 kN,respectively;while rib-side supports demonstrated load redistribution characteristics—mining-side bolts exhibit progressive axial force attenuation(stabilizing within 70～110 kN),and coal pillar-side cables maintain lower stress amplitudes(70～110 kN)with notable fluctuation.Quantitative analysis confirmed enhanced roadway stability through improved support rigidity and dynamic energy absorption capacity,establishing a replicable framework for deep mining under high geostress conditions.