Novel composite type groutable anchor rod

Abstract

The invention discloses a novel composite type groutable anchor rod and belongs to the technical field of mineral engineering anchorage supporting. The anchor rod comprises an outer sleeve, an inner rod body of which the middle is provided with a backflow cavity, a base plate, a nut and a check ring, and grouting holes are formed in the check ring. Grout is poured into a grouting cavity between the outer sleeve and the inner rod body through the grouting holes in the check ring and then is poured into a rock stratum through holes formed in the outer sleeve, after drilling holes are filled with the grout fully, the grout flows back through the backflow cavity, and accordingly grouting is completed. By adopting the anchor rod to conduct supporting, the problems that traditional grouting anchor rods are not high in supporting force and limited in grouting range, and whether drilling holes are filled with grout completely cannot be effectively judged can be solved; grouting is conducted on the deep soft rock stratum, a plastic zone can be decreased, the anchorage force of the anchor rod is increased, and accidents are decreased.

Description

technical field [0001] The invention relates to the field of mining engineering anchoring support technology, in particular to a novel composite groutable anchor rod. Background technique [0002] (1) At present, there are some groutable bolt supports in the high-stress soft rock roadway support, but they are basically hollow bolts, and the cavity inside the bolt is used for grouting. Although the purpose of grouting can be achieved, the Without the support function of the anchor itself, the support effect is not ideal, and it is difficult to promote. (2) At present, most of the grouting anchors only open holes at the end of the anchor for grouting, the grouting range is limited, and the effect is not ideal. (3) At present, most of the grouting bolts basically use holes of equal size for grouting, without considering the time difference between the end and the tail of the grouting. When injecting fast-curing materials, the grout cannot completely fill the drilled hole. Cur...

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Problems solved by technology

In order to solve the problems that most grouting bolts can only be grouted at the tail, the grouting range is small, and the grouting time difference between the end and the tail during grouting, the holes in this patent are of different sizes, and the holes at the end are smaller , the tail hole is larger, and the whole rod body is provided with holes

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