For scientifically and effectively preventing karst water bursting because of fault activation,both the mining activation rule of fault and coal mine karst water bursting effect by fault activation are studied.First of all, according to the fault formation mechanism,the stress environment of all kinds of fault forming had been analyzed,and the stress condition of coal-seam fault activating had been discussed.Then,based on the law of stress field in stope and motion of the rock mass in the course of mining p...