A combined support structure for gob-side entry retaining in a coal mine

Abstract

The utility model relates to a kind of combined support structure for coal mine gob-side entry retaining, belong to coal mining supporting technical field, including multiple groups of arched tray and multiple groups of built-in filling body's flexible filling bag;Multiple groups of tensioned anchor rod for limiting are installed between the front and rear two arched trays, and the tensioned anchor rod penetrates flexible filling bag;The two sides of the arched tray are equipped with the fixed plate for connection;Tensioned net is installed in the lower of the flexible filling bag, and the two sides of tensioned net are fixedly connected fixed plate.The utility model adopts arched tray and built-in filling body's flexible filling bag combined structure, arched tray provides rigid bearing base, flexible filling bag can adapt to the deformation of surrounding rock, realize the organic combination of rigidity and flexibility, effectively improve the adaptability and bearing stability of supporting structure.

Description

Technical Field

[0001] This utility model relates to the field of coal mine support technology, specifically to a combined support structure for coal mine gob-side roadway retention. Background Technology

[0002] In coal mining, the goaf retention technique is an important pillarless mining technology that can effectively improve coal resource recovery rate, reduce roadway excavation work, and lower production costs. However, goaf retention roadways are significantly affected by mining activities, with large deformation and rapid deformation of the surrounding rock, which places extremely high demands on the stability and adaptability of the support structure.

[0003] Existing roadway support structures mostly employ either single rigid or single flexible support. While rigid supports (such as concrete arches and steel supports) offer high overall strength, they have poor adaptability and struggle to accommodate large deformations of the surrounding rock, making them prone to cracking and failure. Flexible supports (such as ordinary filler bags and anchor mesh supports) provide some deformation adaptability, but their overall load-bearing capacity is insufficient, making it difficult to effectively control excessive deformation of the surrounding rock. This leads to increased roadway maintenance costs and may even affect the safety and efficiency of coal mining.

[0004] Therefore, developing a combined support structure for coal mine gob-side roadway retention that combines rigid load-bearing capacity with flexible deformation adaptability, good overall stability, and excellent support effect has become an urgent problem to be solved in the field of coal mine support technology. Utility Model Content

[0005] This utility model aims to solve the above-mentioned technical problems by providing a combined support structure for coal mine gob-side roadway retention.

[0006] To solve the above-mentioned technical problems, the technical solution provided by this utility model is as follows:

[0007] A combined support structure for coal mine gob-side roadway retention includes multiple sets of arched trays and multiple sets of flexible filling bags with built-in fillers.

[0008] Multiple sets of tie rods for limiting the position are installed between the two arched trays at the front and back, and the tie rods penetrate the flexible filling bag;

[0009] The arched tray has fixing plates installed on both sides for connection;

[0010] The flexible filling bag is fitted with a mesh at its bottom, and the mesh is fixedly connected to fixing plates on both sides.

[0011] Furthermore, multiple sets of ladder beams are installed at the lower end of the fixing plate to enhance the bottom bearing capacity and overall stability of the support structure.

[0012] Furthermore, the ladder beam includes support rods installed opposite to the lower end of the fixed plate, and multiple sets of connecting rods are installed between the two support rods. The cooperation between the support rods and the connecting rods forms a ladder-shaped structure, which improves the uniformity and reliability of the bottom support.

[0013] Furthermore, the two sides of the mesh are fixedly connected to fixed plates, and the two ends of the mesh are fixedly connected to the lower end of the arched tray to form an arc-shaped structure. The arc-shaped structure can better fit the bottom contour of the flexible filling bag, improve the support effect on the filling, and prevent the filling from sinking.

[0014] Furthermore, the lower end of the tie rod is equipped with multiple sets of connecting wires that penetrate the flexible filling bag connecting the mesh, so that the mesh and the tie rod form a linkage structure, further improving the overall support coordination.

[0015] Furthermore, the two ends of the arched tray are connected to crossbeams, which connect adjacent arched trays to enhance the lateral integrity of the support structure.

[0016] Furthermore, a reinforcing beam is installed between the middle sections of the multiple sets of crossbeams to strengthen the crossbeams and improve the lateral load-bearing capacity of the entire support structure.

[0017] With the above structure, this utility model has the following advantages:

[0018] This utility model adopts a combination structure of an arched tray and a flexible filling bag with built-in filling. The arched tray provides a rigid load-bearing foundation, while the flexible filling bag can adapt to the deformation of the surrounding rock, achieving an organic combination of rigidity and flexibility, and effectively improving the adaptability and load-bearing stability of the support structure.

[0019] The front and rear arched trays of this utility model are connected by tie rods and pass through a flexible filling bag, which can effectively limit the flexible filling bag and prevent the filling material from shifting during the stress process, while enhancing the synergistic effect of the front and rear support units.

[0020] This utility model features a mesh net installed below the flexible filling bag, which is connected to a fixing plate and an arched tray to form an arc-shaped structure. This structure provides stable support for the filling material and prevents it from sinking or breaking due to its own weight or the pressure of the surrounding rock.

[0021] The ladder beam at the lower end of the fixed plate and the crossbeams and reinforcing beams at both ends of the arched tray of this utility model further enhance the overall rigidity and stability of the support structure, forming a comprehensive support system that effectively controls the deformation of the surrounding rock in the goaf, reduces roadway maintenance costs, and improves the safety and efficiency of coal mining.

[0022] The above overview is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features of the present invention will become readily apparent from the accompanying drawings and the following detailed description. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the structure of this utility model.

[0025] Figure 2 This is a schematic diagram of the connection of the tie rod of this utility model.

[0026] Figure 3 This is a schematic diagram of the connection of the connecting wire in this utility model.

[0027] As shown in the figure: 1. Arched tray; 2. Flexible filling bag; 3. Tie anchor; 4. Netting; 5. Fixing plate; 6. Ladder beam; 601. Support rod; 602. Connecting rod; 7. Connecting wire; 8. Crossbeam; 9. Reinforcing beam. Detailed Implementation

[0028] The embodiments of this application are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0029] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" 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 mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0030] The present invention will now be described in further detail in conjunction with the full text.

[0031] Combined with appendix Figure 1 and Figure 3A combined support structure for coal mine goaf retention includes multiple sets of spaced arched trays 1 and multiple sets of flexible filling bags 2 with built-in fillers. The arched trays 1 are made of high-strength steel and have good rigidity and load-bearing capacity. The flexible filling bags 2 are made of high-strength wear-resistant canvas and are filled with concrete or grouting material to form a filler, which has both flexible deformation capacity and a certain load-bearing strength.

[0032] Specifically, multiple sets of tie rods 3 for limiting are installed between the two arched trays 1. The tie rods 3 are evenly distributed along the arc direction of the arched trays 1. The tie rods 3 penetrate the flexible filling bag 2, and their two ends are fixedly connected to the arched trays 1 by nuts. Through the tension of the tie rods 3, the front and rear arched trays 1 and the flexible filling bag 2 are tightly connected into a whole, preventing the flexible filling bag 2 from shifting laterally when under force.

[0033] In the specific implementation of this utility model, the two sides of the arched tray 1 are welded with fixing plates 5 for connection. The fixing plates 5 are made of steel plates and are set perpendicular to the arched tray 1 to provide a connection base for the subsequent installation of the netting 4 and the ladder beam 6.

[0034] In a specific implementation of this utility model, a mesh 4 is installed below the flexible filling bag 2. The mesh 4 is made of high-strength steel wire mesh. The two sides of the mesh 4 are fixedly connected to the fixing plate 5 by bolts, and the two ends of the mesh 4 are fixedly connected to the lower end of the arched tray 1 by welding. This makes the mesh 4 form an arc-shaped structure that fits the bottom contour of the flexible filling bag 2, which can provide full support for the flexible filling bag 2 and avoid support failure caused by the sinking of the filling.

[0035] In a specific implementation of this utility model, multiple sets of ladder beams 6 are installed at the lower end of the fixed plate 5. Each ladder beam 6 includes a support rod 601 welded to the lower end of the fixed plate 5. Multiple sets of evenly distributed connecting rods 602 are welded between two support rods 601. Both the support rods 601 and the connecting rods 602 are made of threaded steel. The ladder beams 6 are in close contact with the tunnel floor, which can effectively disperse the bottom pressure of the support structure and enhance the bottom stability.

[0036] In the specific implementation of this utility model, multiple sets of connecting wires 7 are tied to the lower end of the tie rod 3. The connecting wires 7 are made of high-strength galvanized iron wire. After passing through the flexible filling bag 2, the connecting wires 7 are tied and fixed to the mesh 4, so that the mesh 4 and the tie rod 3 are linked. When the tie rod 3 is under force, the mesh 4 can be driven to be under force synchronously through the connecting wires 7, thereby improving the overall coordination of the support.

[0037] In this practical implementation, the two ends of the arched pallet 1 are bolted to crossbeams 8. The crossbeams 8 are made of I-beams and are set along the length of the tunnel, connecting multiple sets of arched pallets 1 into a whole, thereby enhancing the lateral integrity of the support structure. Reinforcing beams 9 are welded between the middle sections of the multiple sets of crossbeams 8. The reinforcing beams 9 are set perpendicular to the crossbeams, forming a cross-shaped reinforcement structure, further improving the load-bearing capacity of the crossbeams 8 and preventing them from bending and deforming due to lateral pressure.

[0038] The installation process of this utility model is as follows: First, install the first set of arched trays 1 at the designated position in the goaf-retention roadway and fix them to the surrounding rock of the roadway with anchor rods; then install fixing plates 5 on both sides of the arched trays 1, and fix one end of the pull net 4 to the lower end of the arched trays 1 and the fixing plate 5; next, place the flexible filling bag 2, so that the pull net 4 fits the bottom of the flexible filling bag 2, and insert the tie anchor rod 3 through the flexible filling bag 2 and connect it to the first set of arched trays 1; after the connecting wire 7 passes through the flexible filling bag 2, it is tied and fixed to the pull net 4, so that the pull net 4 and the tie anchor rod 3 form a linkage; then install the second set of arched trays 1, and tighten the tie anchor rod 3 with nuts to complete the installation of one set of support units; after repeating the above steps to complete the installation of multiple sets of support units, install the ladder beam 6, the crossbeam 8 and the reinforcing beam 9 to form a complete combined support structure.

[0039] The present invention and its embodiments have been described above. This description is not restrictive, and the embodiments shown throughout the text are only one of the embodiments of the present invention. The actual structure is not limited to this. In conclusion, if a person skilled in the art is inspired by this description and designs a similar structure and embodiment without departing from the inventive spirit of the present invention, such design should fall within the protection scope of the present invention.

Claims

1. A combined support structure for coal mine gob-side roadway retention, characterized in that, It includes multiple sets of arched trays (1) and multiple sets of flexible filling bags with built-in fillers (2); Multiple sets of tie rods (3) for limiting are installed between the two arched trays (1) at the front and back, and the tie rods (3) penetrate the flexible filling bag (2). The arched tray (1) has fixing plates (5) installed on both sides for connection. A mesh (4) is installed below the flexible filling bag (2), and fixing plates (5) are fixedly connected to both sides of the mesh (4).

2. The combined support structure for coal mine gob-side roadway retention according to claim 1, characterized in that: Multiple sets of ladder beams (6) are installed at the lower end of the fixing plate (5).

3. The combined support structure for coal mine gob-side roadway retention according to claim 2, characterized in that: The ladder beam (6) includes support rods (601) mounted opposite to the lower end of the fixed plate (5), and multiple sets of connecting rods (602) are installed between the two support rods (601).

4. The combined support structure for coal mine gob-side roadway retention according to claim 1, characterized in that: The two sides of the mesh (4) are fixedly connected to the fixing plate (5), and the two ends of the mesh (4) are fixedly connected to the lower end of the arched tray (1) to form an arc structure.

5. The combined support structure for coal mine gob-side roadway retention according to claim 1, characterized in that: The lower end of the tie rod (3) is equipped with multiple sets of connecting wires (7) and the connecting wires (7) pass through the flexible filling bag (2) and connect to the mesh (4).

6. The combined support structure for coal mine gob-side roadway retention according to claim 1, characterized in that: The arched tray (1) is connected to crossbeams (8) at both ends.

7. A combined support structure for coal mine gob-side roadway retention according to claim 6, characterized in that: A reinforcing beam (9) is installed between the middle sections of the multiple sets of crossbeams (8).

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