Abstract: According to the structural characteristics of thick and hard roof, the influencing factors of thrust faults sliding were analyzed based on the actual case. The simplified mechanics model of hanging wall of reverse fault under the influence of horizontal tectonic stress was constructed; and the law of distribution for both horizontal tectonic stress and additional vertical stress induced by the horizontal tectonic stress was studied; And then mechanics reasons of coal and rock dynamic disasters for rock burst and coal and gas outburst were revealed. The research results show that the hanging wall of fault has greater vertical stress than gravity stress. Much elastic energy can be accumulated. If the distance is more far form stress boundary and the fault dip is larger, the descent velocity of both horizontal tectonic stress and additional vertical stress is faster and the value of the both stresses is smaller. If the distance is closer from stress boundary, the horizontal tectonic stress has little change. But the additional vertical stress is incremental with the fault dip rising. And then the mathematical model of the hazard zone of thrust-shear slip of hanging wall was set up.