Study on safety coefficient of steel wire rope in mine shaft hoisting system

In order to rationally determine a safety coefficient of the steel wire rope and to reduce the investment cost of the hoisting equip-ment and the energy consu mption of the operation process,the paper provided a brand new calculation method of the safety coefficient forthe steel wire rope of the mine shaft hoisting. In the safety C oefficient calculation of the steel wire rope,the influences of each impactforce,steel wire rope torsion stress,unbalanced tension and other factors in the normal hoisting pro cess were comprehensively considered,and in combination with the bending fatigue,abrasion,corrosion,wire broken and other factors of steel wire rope,a residual broken C oeffi-cient of steel wire rope was introduced and a calculation method of safety coefficient under the normal hoisting performance was obtained.The vibration equation of h oister under the abnormal performances(full torque braking,overwinding and jamming of the hoisting contain-er) was set up. The dynamic impact features was studied and t he relevant impact coefficient was calculated. Based on the theoretical calcu-lation and analysis on each performance,the safety coefficients of steel wire rope to meet the application of requirements was set up in orderto ensure the safety application under the normal condition of steel wire rope and to ensure the no breaking occurred under the abnor-mal condition.