Device for testing mechanical properties of underground filling materials of coal mines

The utility model discloses a device for testing mechanical properties of underground filling materials of coal mines and belongs to the field of testing of the mechanical properties of the underground filling materials of the coal mines. The device for testing the mechanical properties of the underground filling materials of the coal mines comprises two parts, namely, an upper fixture and a lower fixture, wherein the upper fixture applies a pulling force parallel to axial directions of connecting rods to the connecting rods of the upper and lower fixtures of the device for testing the mechanical properties of the filling materials, the pulling force is converted into the pressure on a to-be-tested sample through the device for testing the mechanical properties of the filling materials, and angles of planes of inner and outer lining plates of the upper and lower fixtures can be adjusted through adjustment of bolts on the fixtures, so that the filling materials bear perpendicular pressure stress or pressure stress in a certain direction, and acting forces on filling walls under different roof conditions under the coal mines are simulated. The device for testing the mechanical properties of the underground filling materials of the coal mines is compact in structure, simple to operate, easy to maintain and reliable to use and has wide practicability in the aspect of testing of the mechanical properties of the underground filling materials of the coal mines.