Assembly type primary support

The utility model belongs to the technical field of weak surrounding rock tunnel engineering, and particularly relates to an assembly type primary support. According to the utility model, the fillingpiece and the supporting part are assembled and mixed, so that the problem can be solved only by mechanical connection of the filling piece and the supporting part, and the installation is simple. Theprefabricated filling part achieves the strength in advance, reduces the cost of early-strength concrete spraying, can effectively reduce the air pollution of the tunnel in the concrete spraying process, and accelerates the construction progress. By reserving the grouting holes and the anchor rod construction holes, whether grouting and anchor rod reinforcement are conducted or not can be selected according to the actual convergence monitoring situation, grouting can be conducted after construction is delayed, and tunnel face excavation is not affected. According to the utility model, the compression resistance of con