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Reinforced concrete two-ended anchor cable and construction method thereof

A reinforced concrete and anchor cable technology, which is used in earth-moving drilling, installation of anchor rods, mining equipment, etc., can solve the problems of unsatisfactory two-way reinforcement of bag swelling, achieve the effect of large horizontal force and improve the bearing capacity of coal pillars

Active Publication Date: 2019-03-08
NORTH CHINA INST OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problem of unsatisfactory expansion of the bag when the two-way reinforcement of the expansion-lock type cross-piercing anchor cable and the problem that the traditional gob-side entry technology cannot realize two-way reinforcement in one-way construction, the invention provides a reinforced concrete cross-piercing anchor cable and its construction. method

Method used

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  • Reinforced concrete two-ended anchor cable and construction method thereof
  • Reinforced concrete two-ended anchor cable and construction method thereof
  • Reinforced concrete two-ended anchor cable and construction method thereof

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specific Embodiment approach 1

[0041] Specific implementation mode 1: This implementation mode provides a reinforced concrete cross-piercing anchor cable, such as figure 1 As shown, the penetrating anchor cable includes two parts: the front fixed end of the anchor cable and the main anchor cable, such as figure 2 As shown, the front fixed end of the anchor cable is composed of a front lock 1, a guide head 2, a front locking ring 3, a clasp 4, a short steel bar 5, a propeller 6, a short propulsion rod 7, a bladder 10, and a grouting pipe 12 , rear locking ring 13, grouting pipe holder 16, such as image 3 As shown, the anchor cable of the main body is composed of an anchor cable 9, a rear lock 15, a tray 8, and a long push rod 14, wherein:

[0042] The short push rod 7 and the long push rod 14 are sleeved on the outside of the anchor cable 9, and the short push rod 7 is located at the front of the anchor cable 9, and the long push rod 14 is located at the rear of the anchor cable 9;

[0043] The front end...

specific Embodiment approach 2

[0057] Embodiment 2: This embodiment is a further description of Embodiment 1.

[0058] Such as Figure 4 As shown, the snap ring 4 is a cylinder, and three holes with a diameter larger than the short steel bar 5 are drilled near the anchor cable 9, and the hole depth is 10mm, which is mainly used as the force transmission between the short steel bar 5 and the anchor cable 9. , and assist in fixing the position of the short steel bar 5 .

specific Embodiment approach 3

[0059] Embodiment 3: This embodiment is a further description of Embodiment 1.

[0060] The structure of the propeller can be selected according to the size of the borehole. For example, in order to meet the requirements of a small borehole, the propeller can be set as a split structure; if the borehole is large enough, the propeller can be simplified into a single Simple overall.

[0061] Such as Figure 5 As shown, the propeller is composed of three parts: the front seat, the rear seat and the card slot, wherein: the front seat is provided with a gap in the radial direction, the rear seat is provided with a reserved slot corresponding to the gap in the radial direction, and the upper part of the card slot There is an inner ring, and the side of the front seat close to the snap ring and the side of the rear seat close to the short push rod are reserved with a reserved tube with an inner diameter of 3~4cm slightly larger than the anchor cable. The reserved tube of the front s...

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Abstract

The invention discloses a reinforced concrete two-ended anchor cable and a construction method thereof. The two-ended anchor cable comprises an anchor cable front fixed end and a main body anchor cable, wherein the anchor cable front fixed end is composed of a front lockset, a guide head, a front locking ring, a clamping ring, short reinforcing steel bars, a pushing device, a short pushing rod, acapsular bag, a grouting pipe, a grouting pipe clamping device and a rear locking ring; and the main body anchor cable is composed of an anchor cable body, a rear lockset, a tray and a long pushing rod. According to the reinforced concrete two-ended anchor cable and the construction method thereof, a novel bidirectional reinforcing technology for a deep thick coal seam small coal pillar for roadway driving along a goaf is provided, coal pillar bidirectional reinforcing can be rapidly and effectively completed on one side of a newly excavated roadway, the action that the lateral confining pressure of the coal pillar is reinforced and thus the coal pillar bearing capacity is improved can be realized, the problem that a traditional roadway driving along the goaf technology cannot realize one-way construction and bidirectional reinforcing is solved, the problem that the capsular bag cannot be fully distended when the two-ended anchor cable is grouted is solved, and meanwhile, grouting pipes with lager inner diameters can be assembled to better complete the grouting.

Description

technical field [0001] The invention relates to a two-way reinforcement device for small coal pillars in deep thick coal seams and a construction method thereof. Background technique [0002] With the increasing depth of coal mining and the thickness of coal seams, the stress of the original rock is gradually increasing, the width of coal pillars is getting larger and larger, and a large amount of coal resources are wasted. Considering the stress environment of the surrounding rock of the roadway and the maximum exploitation of coal resources, the mining technology of roadway protection without coal pillars, including retaining and driving along the gob, was proposed. Unlike gob-side retaining, which is affected by two mining operations in the process of roadway formation and working face mining, and roadway maintenance is extremely difficult, gob-side entry effectively avoids the stress disturbance on the coal pillar caused by mining at the upper working face, and the roadw...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D21/00E21D20/02
CPCE21D20/021E21D21/0026
Inventor 王波谷长宛闫刚刘重阳
Owner NORTH CHINA INST OF SCI & TECH
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