Dynamic safety factor of hoisting system in ultra-deep mine construction

WANG Guoyuan; GE Shirong; WANG Dagang; FAN Wenbo; ZHONG Hailang; NIU Pengxiang; SUN Yuan; MA Deying; XU Ziyang; DENG Qiao

doi:10.11799/ce202506002

Abstract：In the calculation of the minimum safety factor for the load-bearing capacity of hoisting systems in China's ultra-deep shaft construction,the influence of time-varying loads is not fully considered.Aiming at this problem as well as the differences between the minimum safety factor calculation in domestic and international standards,we took Sanshandao Mine as the research object,compared and analyzed the differences in the ultimate hoisting height and hoisting load under the theoretical calculations of the minimum load-bearing safety factor for wire ropes in domestic and international contexts.Furthermore,a multi-body coupled dynamics model of the hoist-wire rope-hoisting container was established,and a dynamic safety factor calculation method based on time-varying load spectra was proposed.This method reveals the vibration characteristics,dynamic tension evolution,and dynamic safety factor variation patterns of the hoisting system during the acceleration,constant speed,and deceleration phases.The research results indicate that during the hoisting process,as the hoisting height increases,the amplitude and frequency of longitudinal and torsional vibrations of the wire rope and bucket gradually increase,while the lateral vibration increases initially,then decreases,and finally stabilizes.Based on the domestic and international theoretical calculations of the wire rope load-bearing safety factor,the dynamic safety factor of the wire rope increases with the hoisting height during the hoisting phase,while it decreases with the lowering height during the lowering phase,with the maximum dynamic fluctuation amplitude occurring during the acceleration phase.