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Novel wedge seam type anchor structure

A bolt, a new type of technology, applied in the installation of bolts, mining equipment, earthwork drilling and mining, etc., can solve the problems of prestress disappearance, loosening, bolt anchoring failure, etc., and achieve the effect of reducing the broken phenomenon and improving the effect

Inactive Publication Date: 2012-02-01
ANSTEEL GRP MINING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This leads to the possibility that the anchoring part of the anchor will loosen in the later stage. Once the anchoring part of the anchor is loose, part of the prestress applied to the anchor will disappear. When the loosening is serious, the prestress will disappear seriously, causing the anchorage fail

Method used

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Embodiment Construction

[0011] The specific implementation manner of the present invention will be described below in conjunction with the accompanying drawings.

[0012] Such as figure 1 Shown: the novel wedge-slit bolt structure of the present invention, comprises anchor rod 1, wedge-slit 2, backing plate and nut, it is characterized in that the front end of the anchor head with wedge-slit 2 is designed as a conical body 3, so The diameter of the large end of the frustum of cone 3 is greater than the diameter of the bolt, and the small end of the frustum of the cone is equal to the diameter of the bolt. The diameter of the big head of the conical frustum according to the present invention is 6mm-8mm larger than that of the anchor rod.

[0013] The angle α between the hypotenuse of the conical frustum 3 and the horizontal plane described in the present invention is equal to the angle α between the hypotenuse of the wedge 4 and the horizontal plane.

[0014] During production, the length of anchor...

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Abstract

The invention belongs to the technical field of slope reinforcement of open-pit mining in metal mining, in particular to a novel wedge seam type anchor structure. The novel wedge seam type anchor structure comprises an anchor rod, a wedge seam, a base plate and a nut, and is characterized in that the front end of the anchor head of the anchor rod with the wedge seam is designed to be a cone, the diameter of the large end of the cone is more than the diameter of the anchor rod, and the diameter of the small end of the cone is equal to the diameter of the anchor rod. The novel wedge seam type anchor structure has the advantages that: in the invention, the shape of the front end of the anchor head of the wedge seam type anchor rod is changed to be the cone instead of original cylinder, therefore, after the wedge seam type anchor rod is anchored, the stress state of hole wall rock under the effect of front end part of the anchor head is changed to be surface contact stress from point contact stress, a wedge is inserted into the wedge seam, the breaking of the rock hole wall of the wedge seam after being extruded caused by concentrated stress is obviously lightened, and the anchoring effect is obviously enhanced.

Description

technical field [0001] The invention belongs to the technical field of slope reinforcement in open-pit mining in metal ore mining, and in particular relates to a novel wedge-seam bolt structure. Background technique [0002] As a mine slope reinforcement technology, bolt support has become a main form of mine roadway, rock engineering and other underground engineering support. There are many types of bolts, including bolts, wedge joints, backing plates and nuts, etc. The front end of the bolt anchor head is generally made into a cylindrical shape. As the wedge is continuously squeezed into the wedge seam, the front end of the bolt anchor head is opened and squeezed into the rock for anchoring. Process the other end of the anchor rod into ribs, then put on the backing plate, screw on the nut to tighten and apply a certain prestress. The biggest disadvantage of this kind of anchor is that the anchoring effect will fail. The main reason is that the part where the anchor rod a...

Claims

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Application Information

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IPC IPC(8): E21D21/00
Inventor 肖键杨明久
Owner ANSTEEL GRP MINING CO LTD
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