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Improved sliding anchor

A sliding body and sliding control technology, which is applied in the installation of bolts, mining equipment, earthwork drilling and mining, etc., can solve problems such as rock anchor breakage

Inactive Publication Date: 2009-08-12
ATLAS COPCO MAI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Conventional rock bolts are capable of transmitting a maximum load corresponding to their mechanical design and break if this load is exceeded (the so-called load at break)

Method used

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  • Improved sliding anchor
  • Improved sliding anchor

Examples

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Embodiment Construction

[0026] figure 1 Denotes a sliding anchor, generally designated 10, intended to be inserted into a rock hole, not shown, to stabilize walls such as tunnels or tunnels. The central element of the sliding anchor 10 is the anchor rod 12 , which is the load-bearing element of the sliding anchor 10 , and the length of the anchor rod 12 determines the length of the sliding anchor 10 . In the illustrated embodiment, the anchor rod 12 is a solid continuous steel rod with a circular cross-section, a diameter of 12 mm, and smooth side surfaces, where the length of the anchor rod 12 is 2 mm. rice. However, the diameter of the anchor rod 12 can be larger or smaller than 12 mm depending on the required load transfer capability and, depending on the operating conditions, the length of the anchor rod 12 can also be longer or shorter than previously indicated. Also, the side surfaces of the anchor rod 12 need not be smooth, but could be, for example, roughened, grooved, or the like. Althoug...

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Abstract

The invention relates to a sliding anchor (10) for inserting in a borehole. The sliding anchor (10) has an anchor rod (12) on which is arranged a sliding control element (14) with a through opening (18) through which the anchor rod (12) extends. The sliding control element (14) comprises a sliding body cage (16) which has at least one cutout (20) for accommodating a sliding body (22) which is in contact with the outer surface of the anchor rod (12). In order to set a predefined breakaway force in a precise and accurately reproducible manner, each cutout (20) is arranged tangentially to the outer surface of the anchor rod (12) for the purpose of accommodating a sliding body (22) in the sliding body cage (16). Furthermore, the outer enveloping surface of each cutout (20) protrudes by a predefined amount into the free cross section of the through opening (18), and each sliding body (22) completely fills the cross section of the cutout (20) associated therewith.

Description

technical field [0001] The invention relates to a sliding anchor or retractable rock anchor for insertion into a hole, wherein the sliding anchor comprises an anchor shank on which a sliding control element having a through hole is arranged, The anchor rod extends through the through hole, and wherein the sliding control element includes a slider housing having at least one recess for receiving a slider that is connected to the anchor rod side surfaces are in contact. Such a sliding anchor is known from WO 2006 / 034208 A1. Background technique [0002] Sliding anchors belong to the field of so-called rock anchors. Rock anchors are used in mining, tunnel construction and special underground operations to stabilize the walls of tunnels or tunnels. For this purpose, holes with a length of between 2 and 12 meters are usually drilled into the rock from tunnels or tunnels. A rock bolt of corresponding length is then inserted into the hole, and the end region of the rock bolt is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D21/00
CPCE21D21/008E21D21/0033E21D21/00
Inventor M·迈德
Owner ATLAS COPCO MAI
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