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A prestressed full-length anchor bolt support method

A full-length anchoring and bolting technology, which is applied to the installation of bolts, earthwork drilling, mining equipment, etc., can solve the problems of difficult construction, complex construction technology, and large holes, with less impact on the arrival time and increased Resistance to deformation, ease of developmental effects

Active Publication Date: 2016-09-14
临沂矿业集团菏泽煤电有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is: the present invention provides a method that is simple, low in cost, small in workload and variable in construction technology in view of the current prestressed full-length anchoring technology, which is difficult to construct, complicated in construction technology, and drilled large holes. Small prestressed full-length anchor bolting method

Method used

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  • A prestressed full-length anchor bolt support method
  • A prestressed full-length anchor bolt support method

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Embodiment Construction

[0028] Embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0029] refer to Figure 1-2 , a kind of prestressed full-length anchor bolt support method described in this specific embodiment, comprises the following steps:

[0030] a. Drill a small hole 1 on the top of the roadway with a pneumatic rock bolter, and clean the hole after drilling the small hole 1;

[0031] b. Take the resin drug roll 2 and place it at the opening of the small hole 1, connect the top of the grouting pipe 8 to the hole sealer 7, and push the resin drug roll 2 at the end of the hole sealer 7, so that the resin drug roll 2 is installed in the small hole 1 bottom;

[0032] c. Connect the grouting pipe 8 to the grouting pump, turn on the grouting pump, inject grout into the grouting pipe 8, inject the cement slurry 10 into the small hole 1 through the grouting pipe 8, and surround the resin medicine volume 2 with the cement slurry 10 P...

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Abstract

The invention relates to a pre-stress full-length anchoring rock bolt retaining and protecting method which comprises the following steps of drilling a small hole in the top of a roadway by a pneumatic rock bolt drilling machine, and cleaning the drilled hole after; pushing a resin explosive roll by the end part of a hole sealing device so as to mount the resin explosive roll at the bottom of the small hole; injecting cement slurry into the small hole through a grouting pipe and the hole sealing device, and stopping grouting until the cement slurry pushes the hole sealing device to the opening of the small hole; after grouting is stopped for 1min, pulling out the grouting pipe to finish the grouting operation; mounting a rock bolt stop-grouting plug at the front end of a rock bolt body, inserting the rock bolt body with the rock bolt stop-grouting plug into the small hole to enable the rock bolt stop-grouting plug to plug the opening of the small hole, and pushing the rock bolt body into the small hole in a rotatable manner; inserting the rock bolt body, removing the pneumatic rock bolt drilling machine after the pneumatic rock bolt drilling machine is stopped for 20-40s, and finally applying pre-tightening force. The pre-stress full-length anchoring rock bolt retaining and protecting method has the beneficial effects that high-flux instant mimic high-intensity cement slurry is used for grouting during mounting of the explosive roll, only the grouting process is added in the construction procedure, and the technology is basically not changed.

Description

technical field [0001] The invention relates to the technical field of mine roadway support, in particular to a prestressed full-length anchor bolt support method. Background technique [0002] Bolt support has been widely used in the field of rock and soil. There are end anchor, extended anchor and full-length anchor anchor methods. In order to improve the support effect and reduce the initial roadway separation and deformation, most end Both the anchor and the anchor bolt are preloaded. Due to the complex construction process of the full-length anchor bolt, it is difficult to apply the pre-tightening force. Generally, the pre-tightening force cannot be added, and the full-length prestressed anchoring cannot be realized. [0003] At present, the prestressed full-length anchoring of ordinary anchor rods generally adopts two forms, both of which are realized by increasing the diameter of the borehole and increasing the aperture ratio. One is to use fast and slow setting res...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D20/02
CPCC04B16/0641C04B24/2623C04B24/2652C04B28/00E21D20/003E21D20/02
Inventor 王振伟魏兴民谈力
Owner 临沂矿业集团菏泽煤电有限公司
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