Full-length anchoring self-drilling anchor rod and anchoring method

Abstract

The invention discloses a full-length anchoring self-drilling anchor rod and an anchoring method. A first through hole and a first ring hole which do not communicate with each other are formed in a first connecting shaft in the axial direction, the first ring hole is coaxially arranged outside the first through hole in a ring mode, and a first quick joint communicates with the first ring hole after penetrating through the first connecting shaft; a second connecting shaft is internally provided with a second through hole in the axial direction, and the second through hole communicates with a second quick joint; the second quick joint, the first through hole and the second through hole communicate to constitute an intermediate exit passage for communicating with high-pressure water, and the first quick connector and the first ring hole constitute a peripheral outlet passage for communicating with low-pressure water; and an outer edge passage communicates with a gap between a steel pipe and a rod body, a center passage communicates with the tail end of the steel pipe, and a drill bit is connected to the head end of the steel pipe. According to the full-length anchoring self-drilling anchor rod and the anchoring method, the overall installation process is simple, the anchor rod can be installed successfully through a roof bolter, the safety of the operation of workers is improved, the labor risk is reduced, and meanwhile, mechanization operation is realized.

Description

technical field [0001] The invention relates to a bolt support technology, in particular to a full-length anchor self-drilling bolt and an anchoring method. Background technique [0002] Coal, as one of the important energy sources in our country, will last for a long time. Coal mine production must be safe and efficient. It is getting more and more serious, and it has a great influence on the section of the underground roadway, causing serious safety hazards to mine ventilation, transportation, pedestrians, etc., and the disrepair of the underground roadway must be controlled. [0003] The traditional underground roadway support adopts U-shaped steel, I-beam, bolt end anchor support, etc., which has high labor intensity and poor support effect, and is not suitable for deep mining of coal mines. U-shaped steel and I-beam support have been phased out. The end-anchor support of the rod also gradually reveals its disadvantages, such as a large amount of labor, insufficient sup...

AI Technical Summary

Problems solved by technology

[0003] The traditional underground roadway support adopts U-shaped steel, I-beam, bolt end anchor support, etc., which has high labor intensity and poor support effect, and is not suitable for deep mining of coal mines. U-shaped steel and I-beam support have been phased out. The end-anchor support of rods has also gradually revealed its disadvantages, such as a large amount of labor, insufficient support strength, complicated process, and inability to realize mechanized operations, etc.

[0004] The existing anchor bolt technology requires four steps to install the bolt: drilling, loading resin, installing the bolt, rotating the bolt and stirring the resin to anchor the bolt. There are many construction steps, the installation process is slow, and the workers are inconvenient to operate; the labor intensity of the workers is high; The debris generated in the hole is easy to block the anchor hole; the anchoring agent is not stirred evenly, and it is difficult to achieve full-length anchoring; it is not suitable for mechanized operations, etc.

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