Based on the geological condition of MaHuangliang coal in the Yushen mining area, the paper systematically studied the overburden's destructiverules of fully-mechanized top coal caving, and established hydro-geological model of research area by using GMS numerical simulation. Based on the model, the paper predicted the water inflow of different aquifer, analyzed the influence of aquifer to coal mining, and introduced the technical plans about fully-mechanized top coal caving mining under water body with shallow overburden and thin bedrock.

The interaction relationship between support setting load and surrounding rock is the basis of support selection and surrounding rock control. The paper analyzes the interaction relationship between support setting load and surrounding rock by means of theory and experimental data. It is proved that setting load has an important influence on inhibiting immediate roof caving and enhancing immediate roof strength. The increment of setting load can prevent immediate roof falling. Setting load can affect the supporting body stiffness and distribution range of augmented resistance .The lower of the setting load, the larger of the roof deflection. The paper puts forward calculation method and influencing factors of coal wall stability ratio. According to the pressure date comparison of Tiebei mine two coal faces, setting load is one of important factors inducing roof large area weighting.