Anchorage length limit device for grouting anchor cable

A technology of anchoring length and limiting device, which is used in the installation of anchor rods, mining equipment, earthwork drilling, etc., can solve the problems of small prestressing action range of anchor cables, unable to give full play to the active support function, etc., and achieve a reasonable anchoring length. Effect

Inactive Publication Date: 2011-04-20
WUYANG COAL MINE OF SHANXI LUAN ENVIRONMENTAL ENERGY DEV CO LTD +1
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  • Abstract
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Problems solved by technology

When grouting, almost the entire anchor cable is used as the end of the anchor cable. At this time, even if a large pre-tightening force is applied, it can only act on a short free end. The prestressing range of the anchor cable is very small, and the anchor cable is almost used as a steel bar. Inserted in the surrounding rock body, it cannot give full play to its active support function

Method used

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  • Anchorage length limit device for grouting anchor cable
  • Anchorage length limit device for grouting anchor cable

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Embodiment Construction

[0015] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0016] Such as figure 1 As shown, it is a schematic diagram of the structure of the anchoring length limit device for grouting and anchoring cables according to the embodiment of the present invention. The length of the anchor cable 1 is short, the two ends of the anchor cable 1 protrude from the casing 6 respectively; one end of the casing 6 is covered with a rubber skin 7, and the center of the rubber skin 7 is provided with a hole, and the anchor cable 1 passes through the casing 6 from the rubber skin 7 The length of the anchor cable 1 protruding from the rubber skin 7 is the anchoring length, and the part of the anchor cable 1 protruding from the rubber skin 7 is cal...

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Abstract

The invention relates to the field of coal mining anchor cables, in particular to an anchorage length limit device for a grouting anchor cable, which comprises an anchor cable, a slurry stopping plug and an arc shaped tray. The anchor cable is sleeved with a sleeve, one end of the sleeve is provided with a rubber skin, the center of the rubber skin is provided with a hole, one end of the anchor cable passes though the sleeve and goes out from the hole of the rubber skin, the length of the anchor cable extending out of the rubber skin is anchoring length, the part of the anchor cable, extending out of the rubber skin, is an anchoring section; the anchoring section and the sleeve are inserted into anchor cable holes on surrounding rocks; the slurry stopping plug can be sleeved at one end of the sleeve, close to the entrance of the anchor cable hole, after slurry grouted to the anchoring section in the anchor cable hole is solidified; and the arc shaped tray is fixed at one end of the anchor cable, exposing out of the anchor cable hole, by a lock. The anchorage length limit device can be used for freely regulating the length of the anchoring end of the grouting anchor cable, controlling the anchoring length of the anchor cable more reasonably so that applied pretightening force can act on a larger area of rocks, thereby fully exerting the active supporting and protecting function of the anchor cable.

Description

technical field [0001] The invention relates to the field of anchor cables for coal mines, in particular to an anchoring length limiting device for grouting anchor cables. Background technique [0002] Reasonable control of the anchoring length of the anchor cable can effectively increase the pretension length of the anchor cable, and better transfer the prestress of the anchor cable to a wider rock mass. In the prior art, when using high-strength prestressed grouting anchor cables to stably support coal mine roadways and slopes, in order to improve the anchoring force of the anchor cable anchor section, the reasonable length of the anchor cable end of the anchor cable is often ignored. When grouting, almost the entire anchor cable is used as the end of the anchor cable. At this time, even if a large pre-tightening force is applied, it can only act on a short free end. The prestressing range of the anchor cable is very small, and the anchor cable is almost used as a steel ba...

Claims

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Application Information

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IPC IPC(8): E21D20/02
Inventor 康红普李秀文陈金宇吴拥政王俊章
Owner WUYANG COAL MINE OF SHANXI LUAN ENVIRONMENTAL ENERGY DEV CO LTD
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