Mining graded grouting reinforcement device

The invention discloses a mining graded grouting reinforcement device, and belongs to the technical field of grouting reinforcement. According to the mining graded grouting reinforcement device, a grouting pipe is provided with a segmented plugging device used for dividing the grouting pipe into at least two grouting sections in the length direction, the grouting pipe is provided with a two-way safety valve on each grouting section, the end, close to the hole bottom, of the grouting pipe is closed, the two-way safety valves have first opening pressure and first closing pressure, and the first opening pressure and the second closing pressure are different. The opening pressure of the two-way safety valves is larger than the grouting pressure of the segmented plugging device, the first closing pressure of the two-way safety valves is larger than the first opening pressure, and the first closing pressure of each two-way safety valve is sequentially increased from the hole opening to the hole bottom. Therefore, a