Abstract：Because of the high supporting cost and poor stability of supporting structure of U-shaped steel supports, the supports of U29 steel short column, grid short column, and grid concrete short column were studied.Using finite element simulation with software ANSYS and indoor axial compression tests, the mechanical properties of U29 steel short column were analyzed, grid short column, and grid concrete short column. The results showed that the maximum bearing capacity of the grid-shaped concrete short columns was about three times that of the grid short columns, and was about 1. 5 times that of the U-shaped steel short columns. Therefore, the grid concrete structural support could make uniform force on the support, which effectively improved the supporting capacity and controlled the scope of roadway plastic damage zone, and increased the supporting durability.

Keyword：concrete grid support;U-shaped steel support;grid support;roadway supporting;mechanical property;