Abstract: In this paper,Sanshandao Gold Mine,being mining,is stutied object.Rockmass structure,the relationship between mechanic characterisitics of ore pillars,top-supporting ore pillars,and fault gouge in mine-controlled fault F1 and its covering rockmass,were discussed.After experiment,material composition.mechanical characteristics of the fault gouge,and their relationship to mud thickness and water content were determined.Then-some reinforcement measures are proposed:1)to anchor middle-inclination structural plane forimprovement of rockmass slide resistance;2)to raise the stiffness level of ore pillars with high inclination;3)to anchor top-supporting ore pillars in advance and to mine ore at different stages i 4) to discharge water from fissure-dense zones for strenthening fault gouge.