Extensible anchor rod with shear resistance function for coal mine tunnel

A coal mine roadway and lengthening bolt technology, which is applied in the installation of bolts, mining equipment, earth-moving drilling, etc., can solve problems such as failure of support, collapse of gangway, roof fall of roadway, etc.

Active Publication Date: 2021-09-14
XIAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the length range of the existing bolt support is limited, and the bolt will be sheared and damaged under the influence of strong horizontal structural stress, fault structure zone, mining activities and other factors, resulting in...

Method used

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  • Extensible anchor rod with shear resistance function for coal mine tunnel
  • Extensible anchor rod with shear resistance function for coal mine tunnel
  • Extensible anchor rod with shear resistance function for coal mine tunnel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] refer to Figure 1-7 , the present invention provides an extendable bolt with shear resistance function for coal mine roadway, which includes a fixed part and a connectable part arranged in the surrounding rock 1, the connectable part and the fixed part are threadedly connected by high-strength connecting bolts 3, The rock wall of the surrounding rock 1 is fixed with a top plate, and the bottom surface of the top plate is provided with an anchor hole, the top of the anchor hole extends upwards into the surrounding rock 2, and an anchor layer 4 is set between the outer wall of the connectable part and the fixed part and the anchor hole;

[0036] The connectable part includes an anchor head 5 and an extendable rod body 6; the anchor head 5 and the top of the extendable rod body 6 are threaded, and the top of the extendable rod body 6 is provided with a top sleeve 7 under the anchor head 5, The bottom surface of the connectable long rod body 6 is threadedly connected with ...

Embodiment 2

[0067] refer to Figure 8-9 , in order to promote the resin anchoring agent to break more thoroughly and enhance the cohesiveness, and at the same time improve the anchoring force, an auxiliary anchoring mechanism is set in the first butt joint thread cavity in this embodiment;

[0068] The auxiliary anchor mechanism includes an anchor assembly, an abutment plate 26, a return spring 27 and an abutment rod 28;

[0069] The top of the return spring 27 is affixed to the top surface of the first butt thread cavity, the bottom of the return spring 27 is affixed to the top surface of the abutment rod 28, the bottom surface of the abutment rod 28 is affixed to the top surface of the abutment plate 26, and the abutment rod 28 The outer wall is provided with a number of anchoring components; the outer wall of the extendable shear sleeve 10 is provided with a number of auxiliary holes 32 suitable for the anchoring components;

[0070] The anchor assembly includes a hinged seat 29, a hi...

Embodiment 3

[0075] refer to Figure 10 , in order to realize docking between the auxiliary rod 31 and the auxiliary hole 32 in Embodiment 2, a positioning mechanism is provided in this embodiment; the positioning mechanism includes a positioning ring plate 33, and the positioning ring plate 33 is sleeved on the long shear sleeve 10 The top of the positioning ring plate 33 is fixed to the outer wall of the long shear sleeve 10. The bottom surface of the positioning ring plate 33 is fixed with a number of positioning columns 34 at equal intervals in the circumferential direction. The top surface of the top sleeve 7 is provided with a number of The position of the positioning post 34 corresponds to the positioning groove, the positioning post 34 is plugged into the positioning slot, and the auxiliary hole 32 corresponds to the position of the auxiliary rod 31 .

[0076] After the top sleeve 7 is positioned, the remaining extendable shear sleeve 10 is connected to the bottom sleeve 9 by screw...

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Abstract

The invention discloses an extensible anchor rod with a shear resistance function for a coal mine tunnel. The anchor rod comprises a fixed part and an extensible part which are arranged in surrounding rock, the extensible part is in threaded connection with the fixed part through a high-strength connecting bolt, a top plate is fixedly connected to the wall of the surrounding rock, an anchoring hole is formed in the bottom face of the top plate, the top of the anchoring hole extends upwards into the surrounding rock, and an anchoring layer is arranged between the outer wall of the extensible part and the fixed part and the anchoring hole. The extensible part comprises an anchoring head and an extensible rod body; the anchoring head is connected with the top of the extensible rod body through threads, a top sleeve is arranged at the position, located below the anchoring head, of the top of the extensible rod body in a sleeving manner, and the bottom face of the extensible rod body is connected with the top of the high-strength connecting bolt through threads; and the fixed part comprises a fixed rod body and a bottom sleeve, and the bottom sleeve is arranged at the bottom of the outer wall of the fixed rod body in a sleeving manner.

Description

technical field [0001] The invention relates to the technical field of coal mine roadway support, in particular to an extendable bolt with shear resistance function for coal mine roadways. Background technique [0002] As an important passage for underground coal mine production, the roadway can be used for various necessary projects such as mine transportation, ventilation, drainage, pedestrians, etc. However, the safety and stability of the roadway is a prerequisite for ensuring the smooth progress of a series of underground operations. In the existing engineering practice, support structures such as anchor rods (cables) are often used to provide support for the roadway to ensure the safety of subsequent construction personnel. [0003] At present, the length range of the existing bolt support is limited, and the bolt will be sheared and damaged under the influence of strong horizontal structural stress, fault structure zone, mining activities and other factors, resulting ...

Claims

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Application Information

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IPC IPC(8): E21D21/00E21D20/02
CPCE21D21/0026E21D20/02Y02A10/23
Inventor 李季张荣光
Owner XIAN UNIV OF SCI & TECH
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