Automatic pressure relief type grouting anchor rod

Abstract

The invention relates to an automatic pressure relief type grouting anchor rod. Anchoring slide sleeves which are arranged behind an anchor rod head in a spaced mode sleeve outside an anchor rod bodyin a sliding sealing mode; anchoring through holes are formed in the inner walls of the anchoring slide sleeves; anchoring slide blocks which are in sliding fit to the hole walls of the anchoring through holes are formed in the anchoring through holes in a sliding mode; outer-end orifices of the anchoring through holes are equipped with pulverizable blocking sheets in a blocking mode; a table shoulder which faces towards and is in sealing fit to the slot bottom of a ring slot is arranged at the periphery of the anchor rod body in a sealing mode; a ring-shaped interval space is formed between the step surface of the table shoulder and the front side slot wall of the ring slot; a radial through hole which communicates with the ring-shaped interval space is formed in the anchor rod body; thetops of the anchoring slide sleeves are equipped with elastic claws capable of being elastically shrunk and stretched; step-shaped locking blocks which are bulged on the inner walls are arranged on the rear parts of the elastic claws; and the step-shaped locking blocks are embedded into grouting long holes formed in the top of the anchor rod body. The automatic pressure relief type grouting anchorrod cancels the original step of regulating an anchorage state of the anchor rod, so that labor intensity of a worker in a construction process is reduced, and anchoring efficiency is improved.

Description

technical field [0001] The invention relates to a bolt, in particular to an automatic pressure relief grouting bolt, which is mainly used in the technical field of geotechnical engineering. Background technique [0002] With the increasing mining depth of global mineral resources, various engineering geological disasters are increasing, such as mine rock burst and large deformation of soft rock, which pose a huge threat to the safe and efficient mining of deep resources. The roadway supported by traditional bolts is far from being able to resist the instantaneous large deformation impact load caused by rockburst, resulting in accidents of bolt breakage and roadway damage. At present, in the support of underground engineering, the weak roadway roof is usually suspended in the upper stable rock formation by means of bolts, and resin anchoring agents are mostly used for anchoring the ends of bolts in engineering, but with the increase of the service life of the roadway, anchori...

AI Technical Summary

Problems solved by technology

[0004] However, when the above-mentioned automatic pressure relief type grouting anchor is in use, it must be divided into two stages: initial anchoring and grouting anchoring, and the former must be completed by manual operation of the anchor body and casing. On the working surface, the labor intensity of the staff will increase sharply, resulting in time-consuming and labor-intensive problems in anchoring construction

[0005] In addition, because the grouting hole is always exposed, during the construction process, the dust left in the drilling will enter the grouting hole, resulting in blockage of the grouting hole and affecting the effect of post-grouting

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