Metal anchor rod with yielding function and using method thereof

Abstract

The invention discloses a metal anchor rod with a yielding function. Based on the prior art, a yielding base is additionally arranged. A left base body of the yielding base is of an integrated structure and comprises a base plate, a lower cylinder and an upper cylinder, wherein the inner diameter of the lower cylinder is d1, the inner diameter of the upper cylinder is d2, the length of the upper cylinder is 20-25 mm, and the length of the lower cylinder is 25-30 mm. A plurality of through notches are evenly formed in the cylinder wall of a cylinder body of a right base body in the axial direction, and a plurality of ribs are formed on the cylinder wall, so that the right base body has the high elastic deformation capacity after being pressed; the length of the cylinder body is 45-50 mm, the wall thickness of the cylinder body is 5-8 mm, and the outer diameter of the cylinder body is d3; and d1>=d3, and d3=d2+1 mm. The using method of the metal anchor rod with the yielding function is basically the same as a using method of an ordinary anchor rod, and has the beneficial effects that the structure is simple, using is convenient, the machining and manufacturing cost is low, supporting is safe, worry is avoided, and labor is saved.

Description

technical field [0001] The invention relates to a metal anchor rod and its use method, in particular to a metal anchor rod with pressure-relieving function and its use method. Background technique [0002] As we all know, the tensile strength and elongation at break of materials are a pair of contradictory unity. Although the anchor rod made of rigid material has high anchoring strength, the deformation can increase rapidly during the support process of the large deformation roadway, especially in the early stage of deformation of the surrounding rock, which will lead to the axial deformation of the metal anchor rod. The force rapidly increases. It is not difficult to imagine that due to the extremely small elongation at break, metal anchors are often broken instantly, resulting in the failure of the anchor support and may lead to roof fall accidents. [0003] Based on this, the pressure anchor came into being. However, the various yield anchors in the prior art generally...

AI Technical Summary

Problems solved by technology

In actual use, due to the rapid destruction of the pressure pipe (instantaneous disappearance), it is difficult to avoid some sand, gravel or loose stones during the "rapid" deformation or sinking of the roof slipping phenome

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