Abstract：In order to offer more scientific references to ground movement and deformation prediction of fully- mechanized mining face with sublevel caving in Yanzhou mine area，based on field survey data and through theoretical study and mathematical analysis，some conclusions are drawn as follows. A formula for relationship between subsidence factor and the ratio of mining width to basement rock thickness is obtained；and a series of formulas for relationships among displacement factor，tangent of main effect angle，displacement distance of inflection point and the ratio of mining width to mining depth are also achieved. It is pointed that，when mining width increases to a certain value(the ratio of mining width to basement rock thickness is about 1.0)，the subsidence factor will increase obviously. As the ratio of mining width to mining depth increases，the change of displacement factor decreases firstly and then increases. When the ratio of mining width to mining depth is about 0.5，the displacement factor reaches to the minimum value. The modified formulas of subsidence prediction value over boundary of fully-mechanized mining face with sublevel caving，which is applicable to Yanzhou mine area，are also gained.
