A coal seam fissure grouting plugging device

Abstract

The invention discloses a coal seam fracture grouting plugging device and relates to the mining field. The end of a fracture inner plugging mechanism can extend into a coal seam fracture, and the fracture inside the coal seam is plugged. Meanwhile, a fracture outer sealing mechanism can conduct high-pressure spray coating on the outer surface of the coal seam and coating the fracture on the outersurface of the coal seam with a layer of plugging slurry, and a protective layer is formed on the outer surface of the coal seam. In this way, the coal seam fracture grouting plugging device can conduct grouting plugging inside the fracture and can form a protective layer outside the fracture, when the protective layer is formed, the fracture is well coated in a high-pressure spray coating mannerfirst of all, then the protective layer is formed outside the fracture, a protective net is utilized to conduct protection, in this way, the fracture plugging effect is effectively improved, and double-layer protection of the coal seam fracture is achieved.

Description

technical field [0001] The invention relates to the mining field, in particular to a coal seam fissure grouting plugging device. Background technique [0002] In the process of coal mining, due to the vibration and vibration during mining, the mine pit gradually expands, resulting in unstable support, which can easily cause cracks in the coal seam, and methane will be stored after the cracks in the coal seam, which is easy to bring danger to workers, and at the same time The coal seam is unstable, and the cracks may also store air. When the temperature is too high, spontaneous combustion will occur. The existing mining process does not have a separate plugging device for coal seam cracks. Generally, supports are set on the coal seam, and then the cracks are filled by replenishing water. However, this method can only solve one-sided problems, and the instability of the coal mine foundation pit remains. Excessive pressure exists, and water may expand cracks when passing throu...

AI Technical Summary

Problems solved by technology

[0002] In the process of coal mining, due to the vibration and vibration during mining, the mine pit gradually expands, resulting in unstable support, which can easily cause cracks in the coal seam, and methane will be stored after the cracks in the coal seam, which is easy to bring danger to workers, and at the same time The coal seam is unstable, and the cracks may also store air, which will spontaneously ignite when the temperature is too high

The existing mining process does not have a separate plugging device for coal seam cracks. Generally, supports are set on the coal seam, and then the cracks are filled by replenishing water. However, this method can only solve one-sided problems, and the instability of the coal mine foundation pit remains. exist, and water may expand cracks when passing through coal seam cracks. At the same time, even if grouting is used for sealing, if the grouting pressure is too high, it will easily lead to crack expansion and aggravate the crack situation.

Images