Multifunctional adjustable formwork for gob-side entry retaining

Abstract

The utility model discloses a multifunctional adjustable formwork for gob-side entry retaining. The multifunctional adjustable formwork comprises a side formwork part and an end formwork part. The side template part comprises side template vertical frames which are symmetrically arranged left and right and side templates, each side template vertical frame is provided with a width adjusting mechanism and a height adjusting mechanism, each width adjusting mechanism comprises a side template vertical frame translation control component, each height adjusting mechanism comprises a lifting adjusting component, and a flexible template hanging frame is fixedly arranged at the top of the lifting end of each lifting adjusting component; the plurality of side templates are detachably mounted on the inner side surfaces of the side template vertical frames in a splicing manner; the end formwork part comprises an end formwork vertical frame and an end formwork installed on the inner side face of the end formwork vertical frame, an end formwork vertical frame translation control mechanism is arranged on the outer side face of the end formwork vertical frame, and a grouting hole is formed in the top of the end formwork. The concrete wall film bag hanging device is easy to operate, high in flexibility, capable of being suitable for hanging concrete wall film bags of different sizes, capable of being used as a rigid formwork and capable of improving the construction efficiency of a concrete continuous wall.

Description

Technical Field

[0001] The utility model relates to an adjustable formwork, in particular to a multifunctional adjustable formwork suitable for gob-side lane retaining, and belongs to the technical field of gob-side lane retaining. Background Art

[0002] Gob-side entry retention technology is one of the core methods of pillarless mining. It involves maintaining the original mining roadway along the edge of the goaf behind the mining face. Using specific technical means, the drift from the previous section is re-supported, leaving it for use in the next section. This approach, known as gob-side entry retention, preserves the original drift along the edge of the goaf. The principle behind this approach is to maintain the stability of the roadway through support technology, thereby reducing the risk of gas accumulation within the mine, while also preventing coal loss and maximizing resource recovery.

[0003] Gob-side entry retaining requires comprehensive consideration of factors such as the tunnel's geological conditions, mining intensity, and support materials to determine an appropriate support scheme. With the increasing scale and complexity of mining operations, the limitations of traditional gob-side entry retaining support methods, such as wood piles, dense single hydraulic props, and stone masonry, have become increasingly apparent. In recent years, flexible formwork concrete technology has been widely used in gob-side entry retaining due to its ease of construction and high strength. However, given the complex working conditions underground in coal mines, flexible formwork concrete support for gob-side entry retaining typically requires multiple operators to secure flexible formwork or film bags using single hydraulic props or anchors. This manual operation is not only labor-intensive but also inefficient, making it difficult to meet the efficiency and safety requirements of modern coal mine operations. Summary of the Invention

[0004] In response to the problems existing in the above-mentioned prior art, the utility model provides a multifunctional adjustable formwork for retaining tunnels along the goaf. It is simple to operate and highly flexible. It is not only suitable for hanging concrete wall membrane bags of different sizes, but also can be used as a rigid formwork, which can reduce manpower requirements and formwork production costs, and improve the construction efficiency of concrete continuous walls.

[0005] To achieve the above purpose, the multifunctional adjustable formwork for gob-side entry retaining comprises a side formwork part and an end formwork part;

[0006] The side formwork portion includes a side formwork frame and a side formwork that are symmetrically arranged on both sides; the side formwork frame is provided with a width adjustment mechanism and a height adjustment mechanism, the width adjustment mechanism includes a side formwork frame translation control component arranged on the outer side of the side formwork frame, and the height adjustment mechanism includes a lifting adjustment component arranged on the side formwork frame, and a flexible formwork hanging frame is fixedly provided on the top of the lifting end of the lifting adjustment component; the side formwork is provided in multiple pieces, and the multiple side formworks can be spliced ​​and detachably installed on the inner side of the side formwork frame, and after the multiple side formworks are spliced ​​and installed on the inner side of the side formwork frame, the inner side of the side formwork frame forms an integral facade structure;

[0007] The end formwork part includes an end formwork frame and an end formwork installed on the inner side of the end formwork frame; an end formwork frame translation control mechanism is provided on the outer side of the end formwork frame, and the end formwork frame translation control mechanism includes an end formwork frame translation control component; a grouting hole is provided on the top of the end formwork.

[0008] As a further improvement of the present invention, tension anchor holes are provided on the side formwork located at the rear of the side formwork stand.

[0009] As a further improvement of the present invention, an exhaust hole is provided on the side formwork located at the top of the side formwork stand.

[0010] As a further improvement of the present invention, the side formwork frame includes a lower support beam, a middle support beam and an upper support beam which are arranged in sequence from bottom to top, and multiple side formworks are clamped and installed between the lower support beam, the middle support beam and the upper support beam through sealing rubber pads.

[0011] As a further improvement of the present invention, a sealing rubber pad is provided on the top of the flexible mold hanging frame.

[0012] As a further improvement of the present invention, the bottoms of the side formwork frames and the end formwork frames are both provided with lifting wheel sets.

[0013] Compared with the prior art, the multifunctional adjustable formwork for retaining a tunnel along the goaf can adjust the spacing between the two side formwork frames symmetrically arranged on the left and right by adjusting the width adjustment mechanism when in use, so as to be suitable for the construction of concrete walls of different sizes. After the concrete wall membrane bag is connected to the flexible formwork hanging frame, the concrete wall membrane bag can be hung on the top by controlling the height adjustment mechanism, and the side formwork and the end formwork have a splicable or replaceable structure, so that they can adapt to various complex geological conditions in the process of retaining a tunnel along the goaf, with simple operation and strong flexibility. When the multifunctional adjustable formwork for retaining a tunnel along the goaf is used as a rigid formwork, the side formwork can be overlapped on the wall surface of the upper concrete wall by adjusting the width adjustment mechanism, and the tension anchor rods can be installed through the tension anchor rod holes at the overlapping position so that the side formwork is tightly overlapped with the wall surface of the upper concrete wall, and the concrete wall can be directly poured into the space enclosed by the end formwork and the side formwork through the grouting hole. When the multifunctional adjustable formwork for retaining a tunnel along the goaf is used for flexible formwork hanging, the side formwork and the end formwork can be omitted to facilitate operation by the operator and reduce the weight of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the structure of the utility model when used as a rigid template;

[0015] Figure 2 This is a schematic diagram of the structure of the utility model when the flexible mold is hung;

[0016] Figure 3 It is a schematic diagram of splicing the edge template of the utility model.

[0017] In the figure: 1. Side formwork frame, 2. Width adjustment mechanism, 3. Height adjustment mechanism, 4. Side formwork, 5. End formwork, 6. Sealing rubber pad, 7. Exhaust hole, 8. Grouting hole, 9. Lower supporting beam, 10. Middle supporting beam, 11. Upper supporting beam, 12. Tie anchor hole, 13. Flexible formwork hanging frame. DETAILED DESCRIPTION

[0018] The present invention is further described below with reference to the accompanying drawings (hereinafter, the description is made with the width direction of the concrete wall as the left and right direction, the direction where the end formwork 5 is located as the front direction, the direction close to the concrete wall as the inner direction, and the direction away from the concrete wall as the outer direction).

[0019] The multifunctional adjustable formwork for retaining a tunnel along the goaf comprises a side formwork part and an end formwork part.

[0020] like Figure 1 、 Figure 2 As shown, the side formwork part includes a side formwork frame 1 and a side formwork 4 that are symmetrically arranged on the left and right; a width adjustment mechanism 2 and a height adjustment mechanism 3 are provided on the side formwork frame 1, and the width adjustment mechanism 2 includes a side formwork frame translation control component arranged on the outer side of the side formwork frame 1, and the side formwork frame translation control component can be a telescopic cylinder drive structure that is tilted or horizontally arranged as shown in the figure, or it can be other translation drive structures such as a wheel drive structure including a power drive wheel, and by controlling the action of the side formwork frame translation control component, the side formwork frame 1 can be controlled to move translationally inward or outward, and the height adjustment mechanism 3 includes a lifting adjustment component arranged on the side formwork frame 1, and the lifting adjustment component can be a telescopic cylinder lifting drive structure that is vertically arranged, or it can be other lifting drive structures such as a gear rack lifting drive structure that is matched, and a flexible mold hanging frame 13 is fixed on the top of the lifting end of the lifting adjustment component, and the lifting action of the flexible mold hanging frame 13 can be controlled by controlling the action of the lifting adjustment component; the side formwork 4 is provided with multiple pieces, such as Figure 3 As shown, multiple side formworks 4 can be spliced ​​and detachably installed on the inner side surface of the side formwork frame 1. After the multiple side formworks 4 are spliced ​​and installed on the inner side surface of the side formwork frame 1, the inner side surface of the side formwork frame 1 can form an integral vertical structure. The side formwork 4 located at the rear of the side formwork frame 1 can be provided with tension anchor holes 12 for installing tension anchors, and the side formwork 4 located at the top of the side formwork frame 1 can be provided with exhaust holes 7 for exhaust.

[0021] The end formwork part includes an end formwork frame and an end formwork 5 installed on the inner side of the end formwork frame; an end formwork frame translation control mechanism is provided on the outer side of the end formwork frame, and the end formwork frame translation control mechanism includes an end formwork frame translation control component and a side formwork frame translation control component. The end formwork frame translation control component can be a telescopic cylinder drive structure, or a wheel drive structure including a power drive wheel, or other translation drive structures. The translation movement of the end formwork frame can be controlled by controlling the action of the end formwork frame translation control component; the end formwork 5 can be a replaceable whole plate structure that matches the height size of the tunnel as shown in the figure, or it can be a multi-piece splicing structure like the side formwork 4. A grouting hole 8 is provided on the top of the end formwork 5.

[0022] When using this multifunctional adjustable formwork for gob-side tunnel retention, the spacing between the two symmetrically arranged side template frames 1 can be adjusted by adjusting the width adjustment mechanism 2 to adapt to the construction of concrete walls of different sizes. After the concrete wall membrane bag is connected to the flexible formwork hanging frame 13, the top hanging of the concrete wall membrane bag can be achieved by controlling the height adjustment mechanism 3. The side templates 4 and end templates 5 have a structure that can be spliced ​​or replaced, so they can adapt to various complex geological conditions in the process of gob-side tunnel retention. It is simple to operate and has strong flexibility. Figure 1 As shown, when the multifunctional adjustable formwork for retaining lanes along the goaf is used as a rigid formwork, the side formwork 4 can be overlapped on the wall surface of the upper concrete wall by adjusting the width adjustment mechanism 2. The overlap distance can be controlled to be 200-300mm. At the overlap position, tension anchors are installed through the tension anchor holes 12 to ensure that the side formwork 4 is tightly overlapped with the wall surface of the upper concrete wall. The concrete wall can then be directly poured into the space enclosed by the end formwork 5 and the side formwork 4 through the grouting holes 8. Figure 2 As shown, when the flexible mold is hung on the multifunctional adjustable mold frame used for retaining lanes along the goaf, the side mold plates 4 and the end mold plates 5 may not be installed to facilitate the operation of the operator and reduce the weight of the device.

[0023] In order to facilitate the splicing and installation of the side template 4, as a further improvement of the present invention, Figure 1 As shown, the side formwork frame 1 may include a lower support beam 9, a middle support beam 10 and an upper support beam 11 arranged in sequence from bottom to top, and multiple side formworks 4 can be installed between the lower support beam 9, the middle support beam 10 and the upper support beam 11 through sealing rubber pads 6.

[0024] In order to facilitate the sealing and hanging of the concrete wall film bag, as a further improvement scheme of the present invention, a sealing rubber pad 6 is also provided on the top of the flexible form hanging frame 13. When the height adjustment mechanism 3 is controlled so that the concrete wall film bag is sealed, the sealing rubber pad 6 on the top of the flexible form hanging frame 13 can achieve a sealed top.

[0025] In order to facilitate the translation of the side formwork frame 1 and the end formwork frame, as a further improvement scheme of the present invention, the bottom of the side formwork frame 1 and the end formwork frame are provided with a lifting wheel group. When the side formwork frame 1 (or the end formwork frame) needs to be translated, the lifting wheel group can be lowered first, and the lifting wheel group can be used to lift the side formwork frame 1 (or the end formwork frame), and then the movement of the side formwork frame translation control component (or the end formwork frame translation control component) can be controlled to improve the flexibility of the translation operation.

Claims

1. A multifunctional adjustable formwork for gob-side tunnel retaining, characterized in that: It includes side formwork parts and end formwork parts; The side formwork part comprises a side formwork stand (1) and a side formwork (4) which are symmetrically arranged on the left and right sides; a width adjustment mechanism (2) and a height adjustment mechanism (3) are provided on the side formwork stand (1); the width adjustment mechanism (2) comprises a side formwork stand translation control component arranged on the outer side of the side formwork stand (1); the height adjustment mechanism (3) comprises a lifting adjustment component arranged on the side formwork stand (1); a flexible formwork hanging frame (13) is fixedly provided on the top of the lifting end of the lifting adjustment component; the side formwork (4) is provided in multiple pieces, and the multiple side formworks (4) are detachably mounted on the inner side of the side formwork stand (1); after the multiple side formworks (4) are spliced ​​and mounted on the inner side of the side formwork stand (1), the inner side of the side formwork stand (1) forms an integral facade structure; The end template portion comprises an end template stand and an end template (5) mounted on the inner side of the end template stand; an end template stand translation control mechanism is provided on the outer side of the end template stand, and the end template stand translation control mechanism comprises an end template stand translation control component; a grouting hole (8) is provided on the top of the end template (5).

2. The multifunctional adjustable formwork for gob-side tunnel retaining according to claim 1, characterized in that: A tension anchor hole (12) is provided on the side formwork (4) located at the rear of the side formwork stand (1).

3. The multifunctional adjustable formwork for gob-side entry retaining according to claim 1 is characterized in that: An exhaust hole (7) is provided on the side template (4) located on the top of the side template stand (1).

4. The multifunctional adjustable formwork for gob-side entry retaining according to claim 1, 2 or 3, characterized in that: The side formwork frame (1) comprises a lower support beam (9), a middle support beam (10) and an upper support beam (11) which are sequentially arranged from bottom to top at intervals, and a plurality of side formworks (4) are mounted between the lower support beam (9), the middle support beam (10) and the upper support beam (11) via a sealing rubber pad (6).

5. The multifunctional adjustable formwork for gob-side entry retaining according to claim 1, 2 or 3, characterized in that: A sealing rubber pad (6) is provided on the top of the flexible mold hanging frame (13).

6. The multifunctional adjustable formwork for gob-side entry retaining according to claim 1, 2 or 3, characterized in that: The bottoms of the side formwork stand (1) and the end formwork stand are both provided with lifting wheel groups.

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