According to overvwinding braking featues of a mine shaft oisting device,from view of a dynamics,verwinding dynanics model ofthe hoisting device was established.Acalculation method of overwinding braking force braking deceleraion and steel wire rope impact fore was provided. The calculatonresuts shoved that overvinding braking deceleration of cage hoisting should be less than g and overwinding braking deceleration of soip hoisting should be lss than 2g .Ades gn method to restrict the inmpact force of the seel wire rope was provided.BEased on conception to restriet the inmpact.the braking peromances of GJ-D te l tand type overwinding buifer device were optinized for the mine shaft oisting. he results showed that the overwinding protecton deice to restrcthe impact force aplied could reduce the stresses of mine shaft headframe and mine shaft towercould reduce 1 2 impact foce to the hoistng stee irerope and could improve the safet relaility of the hoisting system
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