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Expansion shell anchor head for anchor rod and rope

A technology of shell expansion and anchor rod, which is applied in the installation of anchor rod, mining equipment, earth-moving drilling, etc., can solve problems such as failure of mechanical shell expansion anchor head, and achieve the effect of increasing anchorage diameter, easy operation and convenient processing.

Active Publication Date: 2017-01-11
中国平煤神马控股集团有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The diameter of the anchor head of this kind of mechanical expansion shell is generally 20-25mm, and the diameter of the wedge-shaped expansion shell can reach 40-50mm after fully expanding. When the diameter reaches 50mm, it will not form effective frictional resistance with the hole wall, which makes the mechanical expanding shell anchor head have certain limitations and possible failure

Method used

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  • Expansion shell anchor head for anchor rod and rope
  • Expansion shell anchor head for anchor rod and rope
  • Expansion shell anchor head for anchor rod and rope

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] exist figure 1 , 2 A structure of the shell-expanding anchor head for anchor rod and cable is shown in . It is composed of expansion shell clip 2, threaded rod body 1, threaded steel sleeve 3, connecting plate 4, Ω-shaped support frame 5 and steel sleeve 6, etc.

[0028] The two expansion shell clips 2 of the expansion shell anchor head constitute the expansion shell. The outer side of the cross section of the expanding shell clip 2 is arc-shaped, and the outer side of the longitudinal section is zigzag. The inner surface of the expansion shell clip 2 is a cylindrical arc surface. The inner surfaces of the two expansion shell clips 2 are oppositely and symmetrically arranged.

[0029] There is a threaded rod body 1 in the middle of the two shell clips 2 . The threaded rod body 1 is the threaded rod body that the tail portion, that is, the left end in the figure is a threaded segment L, its head is a polished rod segment G, and its head end has a rod head T. The th...

Embodiment 2

[0045] Another structure of the expansion shell anchor head for the anchor rod and anchor cable of the present invention is composed of the expansion shell clip 2, the double-ended threaded rod body 10, the threaded steel sleeve 3, the connecting plate 4, the Ω-shaped support frame 5 and the forward threaded steel sleeve 10 and so on. It is basically the same as Example 1. The difference lies in the double-ended threaded rod body 9 and the forward threaded steel sleeve 10 .

[0046] Figure 9 The structure of the double threaded rod body 9 and the installation position of the forward threaded steel sleeve 10 are shown.

[0047] The double-ended threaded rod body 9 is a threaded rod body whose tail is a threaded segment L and the head is a forward threaded segment L'. A threaded steel sleeve 3 is assembled on the threaded section L of the double-ended threaded rod body 9, and a forward threaded steel sleeve 10 is assembled on the forward threaded section L'. The forward thr...

Embodiment approach

[0052] 1. The Ω-shaped support frame of this example can also adopt other forms of supports, such as: use a vertical plate with a bent edge at the bottom as a support, and the bottom bent edge is welded on both sides of the inner surface of the expansion shell clip 2, and the outer side of the vertical plate is welded on Small axis 8.

[0053] 2. To prevent the connecting plate from detaching from the small shaft, besides using a retaining ring, other methods can also be used, such as: using a washer and a cotter pin, riveting the outer end of the small shaft to a thicker diameter, etc.

[0054] 3. The inner surface of the expansion shell clip 2 is a circular arc surface, the inner diameter of the front end of the inner surface is small, and the inner diameter of the rear end is large, so that after the expansion shell clip is expanded, the outer diameter of the front end of the expansion shell is larger than the outer diameter of the rear end, improving Anchoring effect. It ...

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PUM

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Abstract

The invention discloses an expansion shell anchor head for an anchor rod and rope. The expansion shell anchor head is composed of two expansion shell clamping pieces, a threaded rod, a threaded steel bushing, a connecting plate, a steel bushing and the like. The threaded rod is located between the two expansion shell clamping pieces, and the tail portion of the threaded rod is a reversely-threaded section for assembling the threaded steel bushing; the head portion of the threaded rod is a polish rod section for assembling the steel bushing; a rod tip is arranged at the end of the threaded rod; small shafts are arranged on the two sides of the threaded steel bushing and the steel bushing, and the connecting plate is installed on the small shafts and hinged to small shafts on the two sides of the tail portions and the head portions of the expansion shell clamping pieces. Or, the threaded rod is replaced by a double-end threaded rod; the tail portion of the double-end threaded rod is still a threaded section; the head portion of the double-end threaded rod is a forwardly-threaded section for assembling a forwardly-threaded steel bushing; the rest is the same as the former. The tail end of the threaded rod and the front end of the anchor rod and rope are fixedly connected to serve as an end anchor. During installation of the anchor rod and rope, the threaded rod is driven to rotate to push the threaded steel bushing to move forwards, and the connecting plate enables the two expansion shell clamping pieces to expand and tighten a hole wall. The expansion shell anchor head is suitable for anchoring support of an extremely-soft broken rock mass and is also used for anchoring during drilling of large-diameter holes. The anchoring diameter is increased and can be adjusted, and therefore anchoring force is improved.

Description

technical field [0001] The invention relates to the fields of mine support and rock mass anchoring, in particular to a shell-expanding anchor head for anchor rods and anchor cables used as anchor rods or anchor cable end anchors in weak rock masses, broken rock masses, and large-aperture support in mines . Background technique [0002] With the increase of mining depth in my country's mines year by year, the roadway support is becoming more and more difficult, especially in soft rock mining areas and high stress superposition conditions, the roadway deformation convergence speed is fast, and the roadway broken circle is very large, making roadway support and maintenance very difficult. difficulty. For weak rock mass and coal roadway, resin anchoring agent is generally used for end anchoring, but the bonding strength between resin anchoring agent and weak coal rock mass is low, and it is difficult to adapt to large deformation of surrounding rock. There are also mechanical e...

Claims

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Application Information

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IPC IPC(8): E21D21/00
CPCE21D21/004
Inventor 宋晓红张建国蒋敬平郭建伟李建建黄庆显杨战标
Owner 中国平煤神马控股集团有限公司