Flexible formwork with stirrups used in underground coal mines

Abstract

This utility model relates to the field of coal mine support devices, specifically to a flexible formwork with stirrups for underground coal mines. The flexible formwork includes: a formwork body with anchor bolt holes and anchor bolt sleeves sewn between the relatively arranged anchor bolt holes; a protective net fixed to the outer surface of the formwork body; and a first stirrup rope threaded inside the anchor bolt sleeve, with both ends of the first stirrup rope fixedly connected to the formwork body. In this flexible formwork for underground coal mines, the first stirrup rope and the protective net effectively limit the expansion and local deformation of the formwork body during concrete filling, ensuring the geometric dimensions and forming quality of the concrete structure.

Description

Technical Field

[0001] This utility model relates to the field of coal mine support devices, specifically to a flexible template with stirrups for use in underground coal mines. Background Technology

[0002] In coal mines, filling formwork is mainly used in the technology of leaving roadways along the goaf. After the coal face has been mined, concrete is filled in the roadways along the goaf to provide support, reduce the amount of roadway excavation, alleviate the tension in mine connection, save excavation costs, and improve the overall economic benefits of the mine.

[0003] Chinese utility model patent CN205047234U discloses a flexible formwork with horizontal and vertical double-stretched fibers for goaf entry. This flexible formwork includes a main formwork with injection ports, anchor bolt holes, horizontal flanges, and vertical flanges. During construction, anchor bolts are fixed to the main formwork through the anchor bolt holes, and the anchor bolts and the main formwork work together to control the filling shape of the flexible formwork. However, in actual use, it has been found that the anchor bolt installation requires precise positioning and insertion, and the installation process is cumbersome, resulting in low formwork hanging efficiency and failing to meet the construction requirements of efficient tunneling.

[0004] Therefore, a new technical solution is needed in this field to solve the above problems. Summary of the Invention

[0005] To improve or solve the technical problem of cumbersome anchor bolt installation process and low formwork efficiency in existing technologies, this utility model provides a flexible formwork with stirrups for underground coal mines. The flexible formwork includes: a formwork body with anchor bolt holes and anchor bolt sleeves sewn between the relatively arranged anchor bolt holes; a protective net fixed to the outer surface of the formwork body; and a first stirrup rope threaded through the anchor bolt sleeves, with both ends of the first stirrup rope fixedly connected to the formwork body.

[0006] With the above-described configuration, this utility model of a flexible formwork for underground coal mines includes a formwork body, a protective net, and a first stirrup rope. The protective net is fixed to the outer surface of the formwork body, increasing the tensile strength of the formwork body in both the warp and weft directions. The first stirrup rope is threaded through the anchor bolt sleeve, and both ends of the first stirrup rope are connected to the formwork body, further increasing the tensile strength of the formwork body. The first stirrup rope can be prefabricated within the flexible formwork, avoiding precise positioning and threading during installation, simplifying the construction process, and improving the efficiency of formwork installation and support stability. Through the above-described configuration, the first stirrup rope and protective net in this utility model of a flexible formwork for underground coal mines effectively limit the expansion and local deformation of the formwork body during concrete filling, ensuring the geometric dimensions and forming quality of the concrete structure.

[0007] Furthermore, the template body has opposing front and rear sidewalls, the anchor holes are formed on the front and rear sidewalls, and the protective net is fixed to the front and rear sidewalls; both ends of the first stirrup rope are fixedly connected to the protective net. Through the above arrangement, the first stirrup rope is directly fixed to the protective net, which facilitates the fixation of the first stirrup rope and enhances the synergistic force-bearing effect between the first stirrup rope and the protective net, thereby improving the template body's resistance to expansion and deformation during concrete filling.

[0008] Furthermore, horizontal and vertical ribs are arranged on the template body, and the protective net is fixed to the horizontal and vertical ribs. Through this arrangement, the horizontal and vertical ribs enhance the structural strength of the template body, reducing the risk of deformation. Simultaneously, the protective plate, fixed to the horizontal and vertical ribs, allows the tensile force of the protective net to be distributed to the template body through the ribs, improving the connection stability and force transmission efficiency between the protective net and the template body.

[0009] Furthermore, it also includes a second stirrup rope, which is connected to the ends of multiple first stirrup ropes. Through the above arrangement, the second stirrup rope can connect multiple dispersed first stirrup ropes into a whole, so that the first stirrup ropes form a synergistic force, thereby improving the expansion and deformation resistance of the formwork body during the concrete filling process.

[0010] Furthermore, transverse reinforcing ropes and side reinforcing ropes are pre-embedded within the main body of the template. Through this arrangement, the transverse and side reinforcing ropes enhance the tensile and deformation resistance of the main body of the template.

[0011] Furthermore, the protective net is made of polyester fiber. Through the above-described configuration, polyester fiber possesses high strength and high elastic modulus, which significantly improves the tensile strength and abrasion resistance of the protective net.

[0012] Furthermore, a flame-retardant coating and an antistatic coating are applied to the surface of the protective netting. Through these modifications, the flame-retardant and antistatic coatings enhance the flame-retardant and antistatic properties of the protective netting, mitigating potential safety hazards.

[0013] Furthermore, a hanging bag is installed on the template body, and vent holes, grouting ports and extraction holes are opened on the template body. Attached Figure Description

[0014] The preferred embodiments of this utility model are described below with reference to the accompanying drawings, in which: Figure 1 This is a schematic diagram of an embodiment of the flexible formwork with stirrups for underground coal mines according to this utility model; Figure 2This is a schematic diagram of the internal structure of the flexible template with stirrups for underground coal mines, which is a utility model.

[0015] List of reference numerals in the attached diagram: 1. Template body; 11. Horizontal reinforcing rope; 12. Side reinforcing rope; 13. Horizontal rib; 14. Vertical rib; 15. Hanging bag; 16. Vent hole; 17. Grouting port; 18. Extraction hole; 19. Anchor bolt hole; 2. Protective net; 3. First stirrup rope; 4. Anchor bolt sleeve; 5. Second stirrup rope. Detailed Implementation

[0016] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0017] It should be noted that in the description of this utility model, the terms "upper," "lower," "left," "right," "inner," and "outer," which indicate directional or positional relationships, are based on the directional or positional relationships shown in the accompanying drawings. These are merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0018] Furthermore, it should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "setting," and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection, an indirect connection through an intermediate medium, or a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0019] To improve or solve the technical problem of cumbersome anchor bolt installation process and low formwork efficiency in existing technologies, this utility model provides a flexible formwork with stirrups for underground coal mines. The flexible formwork includes: a formwork body 1, on which anchor bolt holes 19 are formed, and anchor bolt sleeves 4 are sewn between the relatively arranged anchor bolt holes 19; a protective net 2, fixed to the outer side of the formwork body 1; and a first stirrup rope 3, threaded inside the anchor bolt sleeves 4, with both ends of the first stirrup rope 3 fixedly connected to the formwork body 1.

[0020] Figure 1 This is a schematic diagram of an embodiment of the flexible formwork with stirrups for underground coal mines according to this utility model. The flexible formwork with stirrups for underground coal mines according to this utility model includes a formwork body 1, a protective net 2, and a first stirrup rope 3, and is suitable for various concrete filling and support scenarios such as goaf retention and roadway repair in underground coal mines.

[0021] Figure 2 This is a schematic diagram of the internal structure of the flexible formwork with stirrups for underground coal mines, as described in this utility model. Figure 1 and Figure 2 As shown, in one or more embodiments, the template body 1 is generally rectangular box-shaped. The template body 1 includes a front sidewall, a rear sidewall, a left sidewall, a right sidewall, a top wall, and a bottom wall; the front and rear sidewalls are arranged opposite each other, the left and right sidewalls are arranged opposite each other, and the top and bottom walls are arranged opposite each other. Specifically, the template body 1 can be made of a high-strength, corrosion-resistant, flame-retardant, and antistatic high-fiber composite material. Furthermore, transverse reinforcing ropes 11 and side reinforcing ropes 12 are pre-embedded within the template body 1 to enhance the overall tensile strength and deformation resistance of the template body 1 and control its overall shape. Specifically, the transverse reinforcing ropes 11 extend in the vertical direction, and their two ends are fixedly connected to the top and bottom walls, respectively. Figure 2 As shown, the transverse reinforcing ribs are arranged in an array within the main body of the template 1, and multiple transverse reinforcing ropes 11 are arranged at intervals along the left-right and front-back directions. The side reinforcing ropes 12 are arranged at an angle, and the two ends of the side reinforcing ropes 12 are fixedly connected to the top wall and the left side wall, the top wall and the right side wall, the bottom wall and the left side wall, and the bottom wall and the right side wall, respectively.

[0022] See also Figure 1In one or more embodiments, transverse ribs 13 and vertical ribs 14 are provided on the outer surface of the template body 1 to assist in formwork hanging. The vertical ribs 14 are located near the four corners of the template body 1 and extend vertically. Transverse ribs 13 are provided on the left side wall, right side wall, front side wall, and rear side wall, with two transverse ribs 13 on each side wall, spaced apart vertically. Furthermore, hanging bags 15 are installed on the template body 1, mounted on the front and rear side walls near their tops. Furthermore, vent holes 16 are provided on the template body 1. Specifically, the vent holes 16 are located on the top wall to release gas accumulated inside the template during filling, preventing air pressure from affecting the internal pressure of the template body 1 and concrete molding. Furthermore, grouting ports 17 are provided on the template body 1. Specifically, the grouting ports 17 are located in the upper middle position of the front side wall and are used to connect to concrete delivery pipes. The grouting port 17 adopts a double-layer structure. The outer layer is connected to the filling pipe, and the inner layer has a self-closing structure to prevent concrete backflow. Furthermore, an extraction hole 18 is provided on the formwork body 1. Specifically, the extraction hole 18 is located at the upper left position of the front sidewall and is used to connect to the gas extraction pipeline to promptly discharge harmful gases generated during the filling process. Furthermore, anchor bolt holes 19 are provided on the formwork body 1 for arranging the first stirrup rope 3. Specifically, the anchor bolt holes 19 are located on the front and rear sidewalls, and the anchor bolt holes 19 on the front and rear sidewalls are arranged opposite to each other. For example, three sets of anchor bolt holes 19 are arranged vertically on the front sidewall, and each set of anchor bolt holes 19 has four anchor bolt holes arranged horizontally. Furthermore, anchor bolt sleeves 4 are sewn between the oppositely arranged anchor bolt holes 19. The anchor bolt sleeves 4 pass through the front and rear sidewalls and are used to thread the first stirrup rope 3.

[0023] See also Figure 1 In one or more embodiments, the protective net 2 is fixed to the outer side of the template body 1. Specifically, the protective net 2 covers the front and rear side walls of the template body 1. Exemplarily, the protective net 2 is made of high-strength polyester fiber woven into a grid with a mesh size of 5×5 cm to 10×10 cm. The mesh size can be adjusted as needed to ensure that the radial and weft tensile strengths are not less than 120 Kn / m. Furthermore, a flame-retardant coating and an antistatic coating are coated on the surface of the protective net 2. Specifically, a polymer coating with flame-retardant and antistatic properties can be directly coated to adapt to the harsh environment of underground coal mines. Furthermore, the upper and lower sides of the protective net 2 are fixedly connected to the transverse ribs 13 by stitching lines, and the left and right sides of the protective net 2 are fixedly connected to the vertical ribs 14 by stitching lines.

[0024] See also Figure 1In one or more embodiments, the first stirrup rope 3 is threaded inside the anchor sleeve 4. Specifically, the first stirrup rope 3 is made of high-strength, corrosion-resistant synthetic fiber rope. Further, the first stirrup rope 3 is connected to a second stirrup rope 5. Specifically, the first stirrup ropes 3 spaced apart in the left-right direction are connected by the second stirrup rope 5. For example, the ends of four first stirrup ropes 3 spaced apart in the left-right direction are connected by the second stirrup rope 5. Further, the first stirrup ropes 3 with both ends close to the protective net 2 are directly and fixedly connected to the protective net 2. The two ends of the first stirrup rope 3 are connected to the strips or joints of the protective net 2. In this state, the second stirrup rope 5 can be omitted or retained.

[0025] The technical solution of this utility model has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the protection scope of this utility model is obviously not limited to these specific embodiments. Without departing from the principle of this utility model, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will all fall within the protection scope of this utility model.

Claims

1. A flexible formwork with stirrups for use in underground coal mines, characterized in that, include: The template body (1) has anchor bolt holes (19) on it, and anchor bolt sleeves (4) are sewn between the anchor bolt holes (19) arranged opposite to each other. A protective net (2) is fixed to the outer side of the template body (1); The first stirrup rope (3) is threaded inside the anchor sleeve (4), and the two ends of the first stirrup rope (3) are fixedly connected to the template body (1).

2. The flexible formwork with stirrups for underground coal mines according to claim 1, characterized in that, The template body (1) has a front side wall and a rear side wall, the anchor hole (19) is opened on the front side wall and the rear side wall, and the protective net (2) is fixed on the front side wall and the rear side wall; the two ends of the first hoop rope (3) are fixedly connected to the protective net (2).

3. The flexible formwork with stirrups for underground coal mines according to claim 2, characterized in that, A horizontal rib (13) and a vertical rib (14) are arranged on the template body (1), and the protective net (2) is fixed on the horizontal rib (13) and the vertical rib (14).

4. The flexible formwork with stirrups for underground coal mines according to claim 1, characterized in that, It also includes a second stirrup rope (5), which is connected to the ends of a plurality of first stirrup ropes (3).

5. The flexible formwork with stirrups for underground coal mines according to claim 1, characterized in that, Transverse reinforcing ropes (11) and side reinforcing ropes (12) are pre-embedded in the main body of the template (1).

6. The flexible formwork with stirrups for underground coal mines according to claim 1, characterized in that, The material of the protective net (2) is polyester fiber.

7. The flexible formwork with stirrups for underground coal mines according to claim 1, characterized in that, The surface of the protective net (2) is coated with a flame-retardant coating and an antistatic coating.

8. The flexible formwork with stirrups for underground coal mines according to claim 1, characterized in that, A hanging bag (15) is installed on the template body (1), and a vent hole (16), a grouting port (17) and an extraction hole (18) are provided on the template body (1).

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