Abstract: For safety mining orebody under the complex environment of tectonic stress and river plate, according to mine design framework, the site monitoring and numerical method were used to study movement and destruction response characteristics of goaf roof rock, which is filled in the ways of dry stowing and gray sand ratio 1∶4 cementation. The results show that comparing the effectiveness of controlling the goaf roof rock to move and destroy with the gray sand ratio 1∶4 cemented filling mining process, the damage characteristic values that are caused by dry-fill mining process, such as sinking deformation value, principal stress difference, plastic zone and so on are significantly larger, and the goaf roof rock suffered shear failure many times, the fracture zones run through the river plate, so it can't ensure the mine produce safely and successfully.

Key words: Tectonic stress, River plate, Filling mining, Rock stratum displacement, Response characteristics