Small-section long tunnel caving disposal device

Abstract

The utility model belongs to the technical field of tunnel caving treatment, and particularly provides a small-section long tunnel caving treatment device which comprises a plurality of steel arches, pipe sheds, supporting connecting ribs and fixing ribs, the steel arches are evenly arranged along a tunnel, the pipe sheds are obliquely erected on the steel arches, the pipe sheds and the steel arches are fixedly connected through the supporting connecting ribs and the fixing ribs, and the pipe sheds are fixedly connected with the steel arches through the supporting connecting ribs and the fixing ribs. And the tail end of the pipe shed penetrates through the falling body and is inserted into the tunnel face. Wherein the steel arch frame is divided into guide frames and supporting frames, one guide frame is located at the foremost end, the multiple supporting frames are erected on the rear side of the guide frame one by one, steel pipes of the pipe shed abut against the upper portion of the supporting frame at the foremost end from top to bottom, the front ends of the steel pipes of the pipe shed abut against the lower portion of the guide frames from bottom to top, and the distance between the guide frames and the supporting frames is adjusted; the effect of adjusting the included angle alpha between the pipe roof steel pipe and the horizontal plane is achieved. The scheme is suitable for most of small-section tunnels, the pipe shed and the follow-up steel arch are constructed forwards to form a whole, and the supporting safety is guaranteed.

Description

Technical Field

[0001] The utility model belongs to the technical field of tunnel caving treatment, and in particular provides a device for treating caving of a long tunnel with a small section. Background Art

[0002] Tailings ponds are sites constructed by intercepting valley mouths or enclosures, used to store tailings or industrial waste after mineral processing. They also present a high-energy debris flow hazard. The depth of the dam's infiltration line is a key indicator of tailings pond stability and is closely related to flood drainage and backwater management within the pond. Currently, common drainage and backwater facilities in tailings ponds include drainage wells and drainage tunnels. The safety of small-section tunnel excavation and the management of caving are crucial in tailings pond construction.

[0003] Drainage tunnel excavation typically utilizes methods such as full-face blasting, pilot tunneling, or shield tunneling. These tunnels require traversing diverse geological strata and complex geological conditions. Surrounding rock weathering and joint fissure development vary widely, and various excavation techniques cause disturbance to the surrounding rock. This is particularly true in areas with low rock hardness, severe weathering, and well-developed joints and fissures, which are prone to large-scale caving.

[0004] Existing methods for dealing with caving often involve closing the working surface and grouting to plug leaks, which are time-consuming and difficult to guarantee safety. Some large and medium-sized mines with tunnels buried at depths exceeding one kilometer use a combination of reinforced structures such as ground grouting, waterproof concrete, and steel sheds to deal with caving. However, for small-section tunnels buried at depths ranging from tens to hundreds of meters, especially those within a hundred meters, most excavation and support equipment cannot function properly due to space limitations within the tunnels. Currently, continuous arch supports are often used to deal with caving in such small-section tunnels. During the clearing of the caving body, the arches restrict the construction space, resulting in low construction efficiency and insufficient safety. Utility Model Content

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is: a small-section long tunnel collapse treatment device, including a steel arch frame, a pipe shed, supporting connecting ribs and fixing ribs. Multiple steel arch frames are evenly arranged along the tunnel, and the pipe shed is obliquely erected on the steel arch frame. The pipe shed and the steel arch frame are fixedly connected by supporting connecting ribs and fixing ribs. The end of the pipe shed passes through the collapse body and is inserted into the tunnel face.

[0006] Furthermore, the steel arch frame is divided into a guide frame and a support frame, a guide frame is located at the front end, and multiple support frames are erected one by one on the rear side of the guide frame. The steel pipes of the pipe roof are against the top of the support frame at the front end from top to bottom, and the front end of the steel pipes of the pipe roof are against the bottom of the guide frame from bottom to top. Adjusting the distance between the guide frame and the support frame has the effect of adjusting the angle α between the steel pipes of the pipe roof and the horizontal plane.

[0007] Furthermore, the fixing ribs are U-shaped, and the steel pipes of the pipe rack are fixedly connected to the guide frame and the frontmost support frame through the fixing ribs.

[0008] Furthermore, the steel pipes of the pipe rack are fixedly connected to other support frames via supporting connecting ribs.

[0009] Furthermore, arch connecting ribs are welded between the plurality of steel arches.

[0010] The beneficial effects of using the utility model are:

[0011] This solution is suitable for most small-section tunnels. The pipe roof and subsequent steel arch construction form a whole, ensuring the safety of the support, and the progressive steel arch construction process speeds up the construction progress. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 A schematic diagram of the utility model and the construction environment;

[0013] Figure 2 It is a structural diagram of the utility model;

[0014] Figure 3 This is a schematic diagram of the assembly relationship between the steel pipe and the steel arch frame of the utility model;

[0015] Reference numerals include:

[0016] 1. Bottom plate; 2. Roof plate; 3. Work face; 4. Falling body;

[0017] 5. Steel arch frame; 501. Guide frame; 502. Support frame;

[0018] 6. Pipe scaffold; 7. Support connecting reinforcement; 8. Arch connecting reinforcement; 9. Fixing reinforcement. DETAILED DESCRIPTION

[0019] The present invention is described in detail below with reference to the accompanying drawings.

[0020] Reference Figure 1-Figure 3 A device for dealing with caving in a long tunnel with a small cross-section includes a steel arch frame 5, a pipe shed 6, supporting connecting ribs 7 and fixing ribs 9. Multiple steel arch frames 5 are evenly arranged along the tunnel, and the pipe shed 6 is obliquely erected on the steel arch frame 5. The pipe shed 6 is fixedly connected to the steel arch frame 5 by supporting connecting ribs 7 and fixing ribs 9. The end of the pipe shed 6 passes through the caving body 4 and is inserted into the tunnel face 3.

[0021] The steel arch frame 5 is divided into a guide frame 501 and a support frame 502. A guide frame 501 is located at the front end, and multiple support frames 502 are set up one by one on the rear side of the guide frame 501. The steel pipes of the pipe rack 6 are against the top of the support frame 502 at the front end from top to bottom, and the front end of the steel pipes of the pipe rack 6 are against the bottom of the guide frame 501 from bottom to top. Adjusting the distance between the guide frame 501 and the support frame 502 has the effect of adjusting the angle α between the steel pipes of the pipe rack 6 and the horizontal plane.

[0022] The steel arch frame 5 falls directly on the bottom plate 1, and a gap can be reserved between the steel arch frame 5 and the top plate 2 according to construction requirements.

[0023] The fixing ribs 9 are U-shaped, and the steel pipes of the pipe rack 6 are fixedly connected to the guide frame 501 and the frontmost support frame 502 via the fixing ribs 9;

[0024] The steel pipes of the pipe rack 6 are fixedly connected to other support frames 502 via supporting connecting ribs 7 .

[0025] Arch connecting ribs 8 are welded between the multiple steel arches 5 .

[0026] The steel arch frame 5 is made of I-beam.

[0027] The construction process of this scheme is as follows:

[0028] 1. First, set up a steel arch frame 5 in front of the falling body 4;

[0029] 2. Set up another steel arch frame 5 along the tunnel excavation direction;

[0030] 3. Using a down-the-hole drill and its supporting drill rod, impact pipe, pipe following device, eccentric drill bit, casing, steel pipe, and guide pipe, drill a hole toward the fallen body 4 at a horizontal angle α along the tunnel excavation direction, and use steel pipes for pipe following. After setting up multiple steel pipes, a pipe rack 6 is formed;

[0031] The following pipe method adopts eccentric following pipe.

[0032] 4. Excavate and clean the fallen body 4 under the pipe shed 6, continue to set up the steel arch frame 5 in the cleared space, weld supporting connecting ribs 7 between the pipe shed 6 and the steel arch frame 5, and weld arch frame connecting ribs 8 between multiple steel arch frames 5.

[0033] The above content is only a preferred embodiment of the present invention. For ordinary technicians in this field, many changes can be made in the specific implementation methods and application scope based on the concept of the present invention. As long as these changes do not deviate from the concept of the present invention, they all fall within the scope of protection of the present invention.

Claims

1. A device for handling collapse of a long tunnel with a small cross section, characterized by: It includes steel arch frames, pipe sheds, supporting connecting bars and fixing bars. Multiple steel arch frames are evenly arranged along the tunnel. The pipe sheds are obliquely erected on the steel arch frames. The pipe sheds and the steel arch frames are fixedly connected by supporting connecting bars and fixing bars. The end of the pipe shed passes through the falling body and is inserted into the tunnel face.

2. A device for handling collapse of a long tunnel with a small cross section according to claim 1, characterized in that: The steel arch frame is divided into a guide frame and a support frame. A guide frame is located at the front end, and multiple support frames are set up one by one on the rear side of the guide frame. The steel pipes of the pipe roof are against the top of the support frame at the front end from top to bottom, and the front end of the steel pipes of the pipe roof are against the bottom of the guide frame from bottom to top. Adjusting the distance between the guide frame and the support frame has the effect of adjusting the angle α between the steel pipes of the pipe roof and the horizontal plane.

3. A device for handling collapse of a long tunnel with a small cross section according to claim 2, characterized in that: The fixing ribs are U-shaped, and the steel pipes of the pipe rack are fixedly connected to the guide frame and the frontmost support frame through the fixing ribs.

4. A device for handling collapse of a long tunnel with a small cross section according to claim 3, characterized in that: The steel pipes of the pipe rack are fixedly connected to other support frames via supporting connecting ribs.

5. The device for handling collapse of a long tunnel with a small cross section according to claim 1, characterized in that: Arch connecting ribs are welded between the plurality of steel arches.

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