Abstract：As the main failure mode in deep adjoining rock roadway，floor heave is one of the most difficult problems to be solved in deep coal mines and other subsurface projects. How to control the floor heave effectively becomes a crucial matter that should be taken into account in supporting engineering. The contrastive studies to control the deformation of floor in lots of cases show that anchors fixed in floor can function positively. By using the method of 3D numerical simulation，the mechanical process of the anchors fixed in floor is studied，and the time effects of their mechanical properties are also analyzed. Based on the analysis results，the work mechanism of the anchors in floor is summarized. The anchors with high flexural rigidity are fixed into the floor in rows，and they can cut off the plastic slip line of the floor，so the deformation of the floor is controlled effectively. Particularly，the technique is suitable for the deep rock roadway of which rock mass structure belongs to blocky structure. Meanwhile，based on the previous studies，this technique is used in a deep roadway engineering，and the asymmetric design method is applied according to the deformation characteristics of floor，which controls the floor deformation successfully and can be as an instructive theory to floor heave control of deep roadway.
