Hollow grouting mining anchor cable

A hollow, mining technology, applied in mining equipment, bolt installation, earthwork drilling, etc., can solve the problems of unachievable support strength and effect, slow down grouting efficiency, affect grouting effect, etc., and simplify the construction process. , low relaxation value, good plasticity

Pending Publication Date: 2020-09-29
枣庄市顺翔科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The surface of each steel strand of the anchor cable has a texture, which occupies a certain space. At the same time, other types or processes of grouting anchor cables are used underground. Because the grouting effect is not good, it directly affects the grouting effect after the grout solidifies. The strength and effect cannot be achieved, slowing down the grouting efficiency

Method used

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  • Hollow grouting mining anchor cable
  • Hollow grouting mining anchor cable
  • Hollow grouting mining anchor cable

Examples

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Effect test

Embodiment Construction

[0012] The present invention will be further elaborated below in conjunction with the accompanying drawings and specific embodiments.

[0013] Such as Figure 1-2 The mine anchor cable shown has the characteristics of high strength, long anchorage length, and the ability to transmit pre-loaded tension to deep and stable rock formations.

[0014] The structural composition of the hollow steel strand is shown in the following table:

[0015]

[0016] Dimensions and mechanical properties are shown in the table below:

[0017]

[0018] 1. According to the thickness of the coal seam, different lengths of hollow grouting mine anchor cables are selected to ensure that the anchor cable penetrates into the stable rock formation not less than 1.0m.

[0019] 2. Equipment and tools required for construction: bolter, Φ32mm or Φ39mm double-wing drill bit, mixing head, tensioning jack, cement slurry mixer and cement slurry injection pump.

[0020] 3. Construction technology

[0021...

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PUM

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Abstract

The invention discloses a hollow grouting mining anchor cable. The hollow grouting mining anchor cable comprises a head steel pipe, hollow steel strands, plastic grout stopping pipes, plastic grout stopping pipe outer sleeves, hollow hexagon nuts, grouting openings, hexagon bolts, grouting pipes, grout stopping plugs, supporting plates and mining anchor cable anchorage devices, wherein a pluralityof stranded hollow steel strands are fixed to the right side of the head steel pipe; the outer sides of the hollow steel strands are sleeved with the plastic grout stopping pipes; the outer walls ofthe plastic grout stopping pipes are wrapped with the plastic grout stopping pipe outer sleeves; the hollow hexagon nuts are welded to the right ends of the hollow steel strands; the right end openings of the hollow hexagon nuts are arranged to be the grouting openings; the hexagon bolts are in threaded connection with the grouting openings; the grouting pipes are welded to the left sides of the grouting openings; and the right portions of the hollow steel strands are sleeved with the grout stopping plugs. The hollow grouting mining anchor cable has the beneficial effects of being high in strength, good in plasticity, low in relaxation value, good in straightness, high in wrapping force and integrity with resin anchoring agents and grouting liquid and the like.

Description

technical field [0001] The invention relates to a mine anchor cable, in particular to a hollow grouting mine anchor cable. Background technique [0002] In the coal mining face, roadway supports or single pillars are generally used for advance support. When the roadway is irregularly arranged, if the roadway support is used in advance for support, the roadway support is not easy to withdraw when the working face is combined; For protection, due to the large width (4.2m) and high height (4.3m) of the roadway, when single support is used, the labor intensity of workers is high and the risk factor is high. In view of this, a technology of using hollow grouting anchor cables instead of traditional advance support is proposed. The surface of each steel strand of the anchor cable has a texture, which occupies a certain space. At the same time, other types or processes of grouting anchor cables are used underground. Because the grouting effect is not good, it directly affects the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D21/00E21D20/02
CPCE21D20/025E21D21/0026E21D21/0093
Inventor 陈长东陈浩于东国李强孟凡香彭向锋刘绪花张晨
Owner 枣庄市顺翔科技发展有限公司
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