Bow-shaped door type roadway protection support with head-on hanging net scour prevention device in roadway driving

Abstract

The utility model provides a bow-shaped door-type roadway protection support with a head-on hanging net scour prevention device in roadway driving, which comprises roadway protection support main bodies, the roadway protection support main bodies are arranged in a roadway side by side and are fixedly connected with a bracket cross beam, flexible waste rock blocking chains are hung on the roadway protection support main bodies, and chain falling round steel is arranged at the bottoms of the flexible waste rock blocking chains in a penetrating manner; the technical problems that secondary gob-side entry protection is carried out in mining after anchor net cables and broken roof shed supporting in the prior art, the supporting investment in primary roadway tunneling is reduced, and a support is collapsed and broken due to moraine blasting in frame mounting and entry protection are solved, the supporting material investment is reduced, the arrangement of the support for secondary gob-side entry protection and loading and transporting personnel is avoided, and the working efficiency is improved. The forming rate of the roadway is guaranteed, the problem that a supporting material cannot be withdrawn and reused is solved, the effect of supporting while excavating the roadway is achieved, the occurrence of roadway roof fall accidents can be avoided, coal pillar-free mining is achieved, more coal can be mined, economic benefits of more than 1,800 million yuan can be created, and safety and social benefits are remarkable.

Description

Technical Field

[0001] The utility model relates to the technical field of tunnel support, in particular to a bow-shaped door-type tunnel protection bracket with a head-mounted hanging net anti-collision device in tunnel excavation. Background Art

[0002] The existing tunnel support devices have the following problems: ① low support efficiency, which affects excavation; ② the safety and reliability of the roof support is relatively poor when the tunnel passes through the structural zone, and it cannot withstand the large pressure from the tunnel; ③ it cannot cover the unevenness of the tunnel; ④ secondary tunnel protection is required during coal mining; ⑤ the application of goaf-side tunnel protection technology requires secondary installation of frames, which consumes more manpower.

[0003] Therefore, there is an urgent need for a bow-shaped portal tunnel protection support with a head-on hanging net anti-collision device for tunnel excavation, which can solve the above problems. Utility Model Content

[0004] The utility model aims to provide a bow-shaped portal type tunnel protection support in tunneling with a head-on hanging net anti-collision device to solve the problems existing in the above-mentioned prior art.

[0005] To achieve the above purpose, the utility model provides the following solutions:

[0006] The utility model provides a bow-shaped portal type tunnel protection support with a head-on net hanging anti-collision device for tunnel excavation, comprising a tunnel protection support body, which is arranged side by side in the tunnel and fixedly connected to a bracket crossbeam, a flexible rock-blocking chain is suspended on the tunnel protection support body, and a chain-dropping round steel is passed through the bottom of the flexible rock-blocking chain.

[0007] Preferably, the main body of the lane protection support includes a shielding beam, a waist arm beam and a leg beam, and the shielding beam, the waist arm beam and the leg beam are sequentially connected to form a bow-shaped structure.

[0008] Preferably, the bracket crossbeam is provided with a bracket support lug, and the shield beam is fixed to the bracket crossbeam through the bracket support lug.

[0009] Preferably, the support beam ears are fixedly connected to the sidewall vertical beams, and the sidewall vertical beams are anchored on the low sidewalls by anchor cables.

[0010] Preferably, a connecting steel beam is provided on the shield beam.

[0011] Preferably, the shield beam, the waist arm beam and the leg beam are all connected with steel ropes through clamps.

[0012] Preferably, the flexible rock-blocking chain is connected to the lane protection support body via a rigid hook.

[0013] Compared with the prior art, the utility model has achieved the following beneficial technical effects:

[0014] The utility model provides a bow-shaped portal tunnel protection support with a head-on hanging net anti-collision device for tunnel excavation, comprising a tunnel protection support body, the tunnel protection support body is arranged side by side in the tunnel and fixedly connected to the bracket crossbeam, a flexible rock-blocking chain is hung on the tunnel protection support body, and a pendant chain round steel is passed through the bottom of the flexible rock-blocking chain; it solves the problem that after the previous anchor net cable and broken roof frame support, a second tunnel protection along the air is carried out during mining, the support investment in the first tunnel excavation is reduced, and the technical problem of blasting to collapse and smash the support during the installation of the tunnel protection frame is reduced, the support material investment is reduced, the configuration of the second tunnel protection along the air and the transportation personnel is avoided, the formation rate of the tunnel is guaranteed, the problem that the support material cannot be withdrawn and reused, and the effect of supporting while digging the tunnel is achieved, the occurrence of tunnel roof collapse accidents can be avoided, coal pillar-free mining can be realized, more coal can be mined, and economic benefits of more than 18 million yuan can be created, with significant safety and social benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0016] Figure 1 A side view of the main body of a bow-shaped door-type lane protection support in a tunneling tunnel provided by the utility model, which has a head-on hanging net anti-collision device;

[0017] Figure 2 A main front view of a tunnel protection support provided by the utility model, which is a bow-shaped door-type tunnel protection support with a head-on net-hanging anti-collision device in a tunnel;

[0018] Figure 3 A schematic diagram of a flexible rock-blocking chain in a bow-shaped portal-type tunnel protection support in a tunneling tunnel provided by the utility model and having a head-on hanging net anti-collision device. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] The utility model aims to provide a bow-shaped door-type tunnel protection support in tunneling with a head-on hanging net anti-collision device to solve the problems existing in the prior art.

[0021] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0022] Embodiment 1:

[0023] This embodiment provides a bow-shaped portal type tunnel protection support with a head-mounted net anti-collision device, such as Figure 1-3 As shown, it includes a lane protection bracket body 1, which is arranged side by side in the lane and fixedly connected to the bracket crossbeam 2. A flexible rock-blocking chain 3 is suspended on the lane protection bracket body 1, and a pendant chain round steel 4 is passed through the bottom of the flexible rock-blocking chain 3.

[0024] As an implementation mode, the main body 1 of the lane protection support includes a shielding beam 5, a waist arm beam 6 and a leg beam 7, and the shielding beam 5, the waist arm beam 6 and the leg beam 7 are sequentially connected to form a bow-shaped structure.

[0025] As an implementation mode, a joist lug 8 is provided on the bracket crossbeam 2 , and the shielding beam 5 is fixed to the bracket crossbeam 2 via the joist lug 8 .

[0026] As an implementation mode, the support beam lug 8 is fixedly connected to the sidewall vertical beam 9, and the sidewall vertical beam 9 is anchored on the low sidewall through an anchor cable 10.

[0027] As an implementation mode, a connecting steel beam 11 is provided on the shield beam 5 .

[0028] As an implementation mode, the shield beam 5 , the waist arm beam 6 and the leg beam 7 are all connected with steel ropes through the clamping plate 12 .

[0029] As an implementation mode, the flexible rock-blocking chain 3 is connected to the tunnel protection support body 1 through a rigid hook 13 .

[0030] The utility model provides a bow-shaped portal type tunnel protection support with a head-on hanging net anti-impact device for tunnel excavation. The portal installation of the support realizes the decomposition of the support tunnel pressure force, and the support can be quickly installed and removed, repaired and reused without losing materials. The tunnel protection support is installed while excavating, which creates a one-time installation and one-time forming. A rigid soft chain is hung at the head of the tunnel to solve the problem of the support being knocked down and damaged by the impact of blasting. The advanced tunnel protection technology of the support realizes the elimination of secondary arrangements for tunnel protection personnel during mining, alleviating the problem of tight personnel team for deepening tunnel excavation.

[0031] The utility model uses specific examples to illustrate the principle and implementation of the utility model. The above examples are only used to help understand the method and core idea of ​​the utility model. At the same time, for those skilled in the art, according to the idea of ​​the utility model, there will be changes in the specific implementation and application scope. In summary, the content of this specification should not be understood as limiting the utility model.

Claims

1. A bow-shaped portal type tunnel protection support with a head-on mesh anti-collision device for tunneling, characterized in that: It comprises a lane protection bracket body, which is arranged side by side in the lane and fixedly connected to the bracket crossbeam. A flexible rock-blocking chain is hung on the lane protection bracket body, and a chain-dropping round steel is passed through the bottom of the flexible rock-blocking chain.

2. The bow-shaped portal support for tunneling with a head-on mesh anti-collision device according to claim 1 is characterized in that: The main body of the lane protection support comprises a shielding beam, a waist arm beam and a leg beam, and the shielding beam, the waist arm beam and the leg beam are sequentially connected to form a bow-shaped structure.

3. The bow-shaped portal type tunnel protection support with a head-on mesh anti-collision device for tunneling according to claim 2 is characterized in that: The bracket crossbeam is provided with a bracket support lug, and the shielding beam is fixed to the bracket crossbeam through the bracket support lug.

4. The arch-shaped portal type tunnel protection support with a head-on mesh anti-collision device for tunneling according to claim 3 is characterized in that: The supporting lugs of the supporting beams are fixedly connected to the vertical beams attached to the sidewalls, and the vertical beams attached to the sidewalls are anchored on the low sidewalls through anchor cables.

5. The arch-shaped portal support for tunneling with a head-on mesh anti-collision device according to claim 2 is characterized in that: A connecting steel beam is arranged on the shield beam.

6. The arch-shaped portal type tunnel protection support with a head-on mesh anti-collision device for tunneling according to claim 2 is characterized in that: The shield beam, the waist arm beam and the leg beam are all connected with steel ropes through clamping plates.

7. The arch-shaped portal type tunnel protection support with a head-on mesh anti-collision device for tunneling according to claim 1 is characterized in that: The flexible rock-blocking chain is connected to the lane protection support body through a rigid hook.

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