CN213392269U

CN213392269U - Novel coal mine underground sealing wall using 3D printing technology

Info

Publication number: CN213392269U
Application number: CN202022300345.2U
Authority: CN
Inventors: 王凯; 董虎子; 郭阳阳; 张翔; 王龙; 杜昌昂; 孙传文
Original assignee: China University of Mining and Technology Beijing CUMTB
Current assignee: China University of Mining and Technology Beijing CUMTB
Priority date: 2020-10-15
Filing date: 2020-10-15
Publication date: 2021-06-08
Anticipated expiration: 2030-10-15

Abstract

The utility model discloses a novel underground coal mine airtight wall utilizing 3D printing technology, which is arranged at the position where temporary or permanent airtightness is required in the coal mine, comprising a 3D printing wall, an expanded vitrified microbead spray layer, a concrete spray layer, and an external decoration. layer and fixed plate; the fixed plate and the 3D printed wall are integrally printed by an industrial 3D printer, and the 3D printed wall is located between the left and right expanded vitrified microbead spray layers; the materials used for the 3D printed wall It is a high-tech polymer material for construction; the spraying sequence of each spray layer on the surface of the 3D printed wall: first, the expanded vitrified microbead spray layer, then the concrete spray layer, and finally the outer decoration layer; the fixed plate Use anchor rods and anchor cables to fix on the roadway roof, bottom plate and roadway. The coal mine underground airtight wall of the utility model has the advantages of fast manufacturing and forming speed, high efficiency and quickness, good fire resistance, strong adaptability, time saving, and reliable and stable sealing effect.

Description

Novel coal mine underground sealing wall using 3D printing technology

Technical Field

The utility model relates to a coal mine safety technical field, specific novel colliery is airtight wall in pit that utilizes 3D to print technique that says so.

Background

The stability of underground ventilation of a coal mine is the first important task for ensuring safe production of the coal mine, and temporary and permanent sealing walls of the coal mine are important ventilation structures. When a new excavation work is carried out, a sealing wall needs to be quickly constructed at a corresponding sealing position so as to ensure the stable ventilation and normal production activities. Therefore, the method has important significance for the safe production of coal mines by efficiently and quickly constructing the sealing wall with good sealing performance and high service performance.

At present, the underground coal mine sealing wall in China is mainly constructed by using masonry and concrete. The method has long time consumption, high cost, more personnel, low efficiency and poor sealing effect. Meanwhile, the later-stage airtight wall is poor in stability and difficult to maintain, and is easy to deform under the action of mine pressure and external force. Therefore, a novel underground coal mine sealing wall which is high in forming speed, efficient, rapid, good in fireproof performance, strong in adaptability, time-saving and reliable and stable in sealing effect needs to be provided.

SUMMERY OF THE UTILITY MODEL

The utility model discloses an avoid the problem that above-mentioned prior art exists, provide a take shape fast, high-efficient swift, fire behavior is good, strong adaptability, save time, the reliable stable novel colliery of sealed effect airtight wall in pit.

The utility model discloses a novel colliery is airtight wall in pit that utilizes 3D printing technique, set up in the colliery needs the position of interim or permanent airtight in pit, characterized in that, including 3D printing wall body, expanded vitrified micro bubble spout the layer, the concrete spouts the layer, outer decorative layer and fixed disk;

the fixed disc and the 3D printing wall are integrally printed by an industrial 3D printer, and the 3D printing wall is positioned between the left and right expanded and vitrified micro bubble spraying layers;

the material used by the 3D printing wall body is a high-tech polymer material for buildings;

the spraying sequence of each spraying layer on the surface of the 3D printing wall body is as follows: firstly, an expanded and vitrified small ball spraying layer, then a concrete spraying layer and finally an outer decorative layer are arranged;

the fixed disc is fixed on the top of the roadway, the bottom plate and two sides of the roadway by anchor rods and anchor cables.

The 3D printing wall body is integrally printed and formed on an industrial 3D printer used on the ground according to the size and the shape of a roadway.

The 3D printing wall body needs to dig grooves of 15 cm-30 cm on the top of the roadway, the bottom plate and two sides of the roadway, and the 3D printing wall body is embedded.

The spraying thickness of the expanded and vitrified small ball spraying layer is not less than 20 mm.

When the fixed disks are fixed, 3-5 fixed disks are arranged at the top, the bottom and the two sides of the roadway.

Has the advantages that: the utility model discloses can effectively avoid the brick stone and mix earth to build the long consuming time and the inefficiency scheduling problem of seal wall, greatly improve the speed of building of colliery underground seal wall, reduce the cost and the engineering burden of building the seal wall, strengthen the sealed effect of seal wall.

Drawings

Fig. 1 is the utility model relates to an utilize 3D to print novel colliery underground sealing wall's of technique overall structure sketch map.

Fig. 2 is a schematic sectional structure view along a line a-a' of the novel coal mine underground sealing wall using the 3D printing technology shown in fig. 1.

In the figure, l, lane; 2. 3D printing the wall body; 3. spraying a layer of expanded and vitrified micro bubbles; 4. spraying a concrete layer; 5. an outer decorative layer; 6. and (7) fixing the disc.

Detailed Description

The utility model is suitable for a coal mine is each in pit need build each position in the tunnel of seal wall, it is right below combining the drawing the utility model discloses do further description:

as shown in attached

drawings

1 and 2, the novel coal mine underground sealing wall utilizing the 3D printing technology is arranged at a position needing temporary or permanent sealing in a coal mine underground, and comprises a 3D printing wall body 2, an expanded and vitrified micro bubble spraying layer 3, a concrete spraying layer 4, an outer decorative layer 5 and a fixed disc 6; the fixed disc 6 and the 3D printing wall body 2 are integrally printed and formed by an industrial 3D printer, and the 3D printing wall body 2 is positioned between the left and right expanded and vitrified micro bubble spraying layers 3; the 3D printing wall body 2 is made of a high-tech polymer material for buildings; the spraying sequence of each spraying layer on the surface of the 3D printing wall body 2 is as follows: firstly, an expanded and vitrified small ball spraying layer 3, then a concrete spraying layer 4 and finally an outer decorative layer 5 are arranged; the fixed disc 6 is fixed on the top of the roadway 1, the bottom plate and two sides of the roadway 1 by anchor rods and anchor cables.

The specific method comprises the following steps:

a. and measuring relevant shape parameters such as the length, the height and the like of the section of the roadway 1 needing to construct the sealing wall.

b. And (c) inputting the parameters of the roadway 1 measured in the step a into an industrial 3D printer, and manufacturing a 3D printing wall body 2.

c. And (3) conveying the 3D printing wall body 2 (comprising the fixed disc 6) and other required materials to the underground construction of the sealing wall.

d. Digging 15 cm-30 cm grooves at the top, the bottom plate and two sides of the tunnel 1 at the construction position of the closed wall of the tunnel 1, embedding the 3D printing wall body 1, and fixing the 3D printing wall body 2 by using an anchor rod and an anchor cable to penetrate through the hole of the fixed disc 6.

e. And the expanded and vitrified small ball spraying layer 3, the concrete spraying layer 4 and the outer decorative layer 5 are sprayed on the wall body in sequence.

The utility model discloses the principle and the implementation mode of the utility model are explained by applying the concrete embodiment, and the explanation of the above embodiment is only used to help understand the method and the core idea of the utility model; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the concrete implementation and the application scope. In summary, the content of the present specification should not be construed as a limitation of the present invention.

Claims

1. a novel underground coal mine airtight wall utilizing 3D printing technology, arranged in a position where temporary or permanent airtightness is required under the coal mine, it is characterized in that, comprising 3D printing wall (2), expanded vitrified microbead spray layer (3) , a concrete spray layer (4), an outer decorative layer (5) and a fixed plate (6);

The fixed plate (6) and the 3D printed wall (2) are integrally printed by an industrial 3D printer, and the 3D printed wall (2) is located between the left and right expanded vitrified microbead spray layers (3);

The fixing plate (6) is fixed on the top and bottom of the roadway (1) and the roadway (1) by using an anchor rod and an anchor cable.

2. A novel underground coal mine airtight wall utilizing 3D printing technology according to claim 1, wherein the 3D printing wall is formed by integrated printing on the ground using an industrial 3D printer according to the size and shape of the roadway .

3. A novel underground coal mine airtight wall utilizing 3D printing technology according to claim 1, characterized in that, the 3D printing wall (2) needs to be installed on the top, bottom plate and roadway (1) of the roadway (1). Help dig out 15cm-30cm grooves and embed the 3D printed wall (2).

4. A novel underground coal mine airtight wall utilizing 3D printing technology according to claim 1, characterized in that, the spray thickness of the expanded vitrified microbead spray layer (3) is not less than 20mm.

5. A novel underground coal mine airtight wall utilizing 3D printing technology according to claim 1, characterized in that, when the fixing plate (6) is fixed, the top and bottom of the roadway (1) and the roadway (1) are two gangs. The number of fixed discs (6) is 3-5.