Abstract：The deformation control of surrounding rocks is one of the key problems in deep mining. Only when the mechanism and control mechods of floor heave are correctly understood，the difficult problems in the support of roadways in soft rocks of deep mines can be solved. Based on the field investigation，model tests and numerical simulation，the features and mechanism of four kinds of floor heave of roadway in deep coal mining are discussed，the major factors affecting the floor heave are analyzed，and recent advance of control methods of floor heave in coal mines，including two cases in China，is summarized
