ABSTRACT
On the basis of geological and production conditions of 34223 fully mechanized caving face in Quantai coal mine, the distribution of displacement field of top coal deformation is analyzed by means of UDEC3.0 numerical calculating method, which indicates that the top coal deformation shows a characteristic of front-to-back dynamic unstable areas. And the impact of support rigidity and rotation angle of main roof on support bearing and on top coal deformation is investigated. Last, the feasibility of light-duty support used in fully mechanized caving face is also analyzed.
