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Full length anchor bolt for flexible stabilization of coal body and application thereof

A full-length anchoring and coal body technology, applied in the installation of bolts, mining equipment, earthwork drilling and mining, etc., can solve the problems of small support cycle progress, low support strength, poor support effect, etc., to shorten the construction time , Reduce the cost of grouting, and fix the effect firmly

Inactive Publication Date: 2015-09-23
CHINA UNIV OF MINING & TECH (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] There are many problems in the above method of treating coal wall slabs, such as low support strength, small support cycle progress, high support cost, and poor support effect.

Method used

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  • Full length anchor bolt for flexible stabilization of coal body and application thereof
  • Full length anchor bolt for flexible stabilization of coal body and application thereof
  • Full length anchor bolt for flexible stabilization of coal body and application thereof

Examples

Experimental program
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Effect test

Embodiment Construction

[0020] refer to figure 1 , 2 , 3 The embodiment of the present invention is described, a kind of coal body flexible reinforcement full-length anchor bolt is made up of grouting pipe body 1, connecting sleeve 2, grout stopper 3, seepage hole 4, grouting port 5, wherein grouting The pipe body 1 includes a grouting pipe 6 and a palm rope 7 , and the grout stopper 3 includes a piston 8 , a spring 10 and a blocking plug 9 . Determine the depth and diameter of the grouting hole and the angle between the grouting hole and the coal wall according to geological conditions and production needs, drill into the grouting hole, cut according to the grouting hole or connect the grouting pipe body 1 with the connecting sleeve 2, and insert The assembled coal body flexible reinforcement full-length anchor rod body is put into the grouting hole to the bottom of the borehole, and then the chemical grout is passed through the grouting port 5, the grouting pressure compresses the piston 8 and the...

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Abstract

The invention relates to a full length anchor bolt for flexible stabilization of a coal body and an application thereof. The full length anchor bolt for flexible stabilization of the coal body and the application thereof aim at achieving fastening of the large-deformed coal body. The anchor bolt is mainly composed of a grouting pipe body, a stop-grouting plug, a connecting sleeve, a grouting opening and a seepage hole. The grouting pipe body comprises a grouting pipe and a coir rope wound on the grouting pipe. The grouting pipe is a hollow PVC plastic pipe with holes formed in the periphery. The coir rope is sisal hemp white coir rope which is normally used in industry and is bonded and wound at the periphery of the grouting pipe. The stop-grouting pipe comprises a piston, a spring and a stop plug and is used for stopping grout from flowing out of the grouting pipe. The connecting sleeve can be covered on the end head of the grouting pipe body without a seam and plays the effect of connecting with the anchor bolt, so that the anchor bolt can be prolonged. The anchor bolt achieves the function of strengthening supporting intensity by grouting to the inside of the coal body, the large deformation of the coal body can be controlled effectively, coal wall caving can be prevented, and comparatively good popularization prospect is achieved.

Description

technical field [0001] The invention belongs to the field of stope coal wall reinforcement, and specifically relates to a full-length anchor bolt for flexible coal reinforcement and its application. The flexible material and the grouting material are combined, and the grout is directly injected into the coal body through the anchor rod, increasing the The support strength can effectively control the large deformation of the coal body and prevent coal wall spalling. Background technique [0002] In coal mines with large mining heights, soft coal seams, inclined mining faces, and deep mining faces, the problem of coal wall spalling is prominent, which seriously affects the advancing speed and normal cycle operation of the working face, making it difficult to achieve high-yield, efficient and safe mining. The formation of coal wall slabs is due to the formation of high abutment pressure on the coal body in front of the working face. Once the support pressure exceeds the strengt...

Claims

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Application Information

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IPC IPC(8): E21D21/00E21D20/02
Inventor 杨胜利程占博孔德中曹光明蒋威赵光普
Owner CHINA UNIV OF MINING & TECH (BEIJING)
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