Air bag assembly for underground filling body reserved roadway

Abstract

The utility model discloses a plurality of groups of air bag components for reserving a roadway for an underground filling body, the air bag components are reserved in the roadway, and each air bag component comprises a semicircular support part, a straight edge support part, an air bag and an anchor rod. When the air bag assembly is connected, a plurality of air bags are connected in series through a long shaft, then the semi-circle supporting part and the straight edge supporting part which are erected are placed in the middle of a connector formed after the adjacent air bags are connected in series, and after all the air bags are connected in series, the connector of the negative air bag of the air bag at the innermost end is blocked; the air bags are filled with gas or liquid from the male air bag connector of the air bag at the outermost end until the whole air bags are filled with the gas or liquid, then the male air bag connector of the air bag at the outermost end is blocked, filling of the air bags is completed, finally the filling space is filled with slurry, and after the filling slurry is condensed into a filling body, the reserved roadway is manufactured. The air bag assembly is used for filling and occupying the reserved roadway, the stability of a reserved roadway supporting structure is effectively maintained, and the roadway forming quality and efficiency of the reserved roadway in the filling body are improved.

Description

Technical Field

[0001] This utility model relates to the field of filling mining equipment, specifically to an airbag assembly for pre-reserved roadways in underground filling bodies. Background Technology

[0002] Backfill mining is a type of artificial support mining method. It primarily involves feeding backfill material into the goaf to manage ground pressure, control rockfall and surface movement, and then mining on the resulting backfill body. This method is particularly suitable for mining high-grade, rare, and valuable ores in unstable rock masses, such as those near water bodies, railway lines, major buildings, and those with a risk of spontaneous combustion. Due to its advantages, including high adaptability, high ore recovery rate, low dilution rate, safe operation, and the ability to utilize industrial waste to protect the surface, it has become the mainstream mining method in underground mines both domestically and internationally.

[0003] To improve mining efficiency and ensure mining safety, domestic mines using the backfilling method primarily employ a two-step mining approach: mining and backfilling one access road or stope at a time. Once the backfill in the first access road or stope has reached sufficient strength, mining and backfilling of the second access road or stope commences. However, this method often requires excavating the backfill within the first access road or stope during the second step, creating a pre-cutting roadway for the second ore body. Excavating pre-cutting roadways within the backfill presents numerous risks and drawbacks, including poor safety, high construction difficulty, and low efficiency. Therefore, the technology of reserving roadways within the first-step backfill for the second-step ore body mining has emerged. To ensure roadway formation, inflatable filling chambers are placed under the pre-reserved roadway support structure as spacers to prevent backfill slurry from entering the roadway and avoid secondary cleaning of the pre-reserved roadway. Although this method has a faster construction efficiency and less construction difficulty, the airbags in the reserved roadway must be spliced ​​together to occupy their positions due to the limited length of the airbags. After splicing, the filling slurry is prone to flow into the gaps between the airbags, which affects the occupancy effect and recycling of the airbags. As a result, the reserved roadway in the filling body needs to be cleaned, corrected and shaped before it can be used, resulting in low roadway quality and efficiency. Utility Model Content

[0004] This utility model provides an airbag assembly for reserved roadways in underground filling bodies. The purpose is to use the airbag assembly to fill and occupy reserved roadways, effectively maintain the stability of the reserved roadway support structure, and improve the quality and efficiency of roadway formation within the filling body.

[0005] To achieve its purpose, this utility model adopts the following technical solution:

[0006] An airbag assembly for a reserved roadway in a downhole filling body, wherein the airbag assembly comprises several sets and is reserved in the roadway, and the airbag assembly includes a semi-circular support, a straight-edge support, an airbag, and an anchor bolt;

[0007] The semi-circular support includes a semi-circular bracket. Several sets of recessed clips are equidistantly distributed on the outer periphery of the semi-circular bracket. An anchor rod is snapped into the recessed clip to connect adjacent semi-circular brackets. The semi-circular bracket has a first foot at both ends and a first connecting hole on the first foot.

[0008] The straight-edge support includes a straight bracket, with a top foot at the top and a second bottom foot at the bottom; the top foot has a second connecting hole that matches the first connecting hole.

[0009] The airbag includes a cylindrical airbag skin, with a male airbag connector and a female airbag connector at each end of the airbag skin. A limiting wire is provided inside the airbag skin for connecting the male airbag connector and the female airbag connector. The female airbag connector is annular, with a connector groove inside the annular shape. The male airbag connector includes a connector base located inside the airbag skin and a connector insertion part protruding outside the airbag skin. The connector insertion parts of adjacent airbags are tightly inserted into the connector groove.

[0010] Furthermore, each set of the recessed cards is formed by two cards fixed to the outer periphery of the semi-circular bracket, and the distance between adjacent recessed cards is 0.4-0.6m.

[0011] Furthermore, connection indicator lines are provided at both ends of the outer periphery of the airbag skin.

[0012] Furthermore, both the connector base and the connector insertion part are annular, with the same inner diameter, and the outer diameter of the connector base is larger than the outer diameter of the connector insertion part.

[0013] Compared with the prior art, the present invention adopts the following technical solution:

[0014] 1. The airbags provided by this utility model are specially designed airbags. Both ends of the airbag are designed with male and female airbag connectors, and the airbags contain limiting strands. Connection indicator lines are provided on the airbag skin to ensure a tight connection between adjacent airbags while facilitating inflation and molding. Furthermore, the airbags are protected within the support structure formed by the semi-circular support and straight-edge support, preventing the filling slurry from entering the gaps in the airbag connectors. The airbags are conveniently inflated after being connected in series, making construction quick and easy, with good connection effect, thus improving the quality and efficiency of roadway formation within the filling body.

[0015] 2. This utility model uses a combination of semi-circular support parts and straight-edge support parts to support the specially designed airbag. Adjacent semi-circular support parts are connected by anchor bolts. After support, it can not only effectively protect the airbag joint and airbag body, but also have a significant stabilizing and reinforcing effect on the support structure of the reserved roadway. Together with the support structure of the reserved roadway, it resists the pressure transmitted by the filling slurry and filling body, and has strong compressive strength.

[0016] 3. The adjacent airbags provided by this utility model are easy to disassemble and assemble after being connected by male and female airbag connectors. The semi-circular support and the straight side support only need to be connected by a few basic bolts or pins, which makes the overall installation and recycling of the airbag assembly quick, efficient and convenient, and improves the economy of the airbag occupancy method in the reserved roadway. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the semi-circular support structure in the airbag assembly of this utility model;

[0018] Figure 2 This is a schematic diagram of the straight-edge support structure in the airbag assembly of this utility model;

[0019] Figure 3 This is a schematic diagram of the structure of the airbag assembly of this utility model after the airbag is fully inflated;

[0020] Figure 4 for Figure 3 The left view;

[0021] Figure 5 This is a front view of the male airbag connector in the airbag of this utility model;

[0022] Figure 6 for Figure 5 The left view;

[0023] Figure 7 This is a front view of the vaginal airbag connector of this utility model;

[0024] Figure 8 for Figure 7 The right view;

[0025] Figure 9 This is a schematic diagram of the structure after the semicircular support and the straight-edge support of this utility model are connected;

[0026] Figure 10 for Figure 9 The left view;

[0027] Figure 11 for Figure 10 Enlarged view of point A in the middle;

[0028] Figure 12 This is a schematic diagram of adjacent airbags connected in series according to this utility model;

[0029] Figure 13 This is a schematic diagram of the airbag assembly of this utility model after assembly;

[0030] Figure 14 for Figure 13 The left view;

[0031] In the diagram: 1-Semicircular support; 11-Semicircular bracket; 12-Concave clip; 13-First base; 131-First connecting hole; 2-Straight edge support; 21-Straight bracket; 22-Top foot; 23-Second base; 221-Second connecting hole; 3-Airbag; 31-Airbag skin; 32-Positive airbag connector; 33-Negative airbag connector; 34-Limiting twisted wire; 35-Connection indicator line; 321-Connector insertion part; 322-Connector base; 331-Connector circular groove; 4-Anchor bolt. Detailed Implementation

[0032] The present invention will be further described below with reference to the accompanying drawings:

[0033] like Figure 1-14 As shown, this utility model is an airbag assembly for a reserved roadway in a downhole filling body. The airbag assembly consists of multiple sets and is reserved in the roadway. The airbag assembly includes a semi-circular support part 1, a straight-edge support part 2, an airbag 3, and an anchor bolt 4.

[0034] The semicircular support 1 includes a 4m wide semicircular bracket 11 made of pressed steel. Multiple sets of recessed clips 12 are evenly distributed around the outer periphery of the semicircular bracket 11. Each set of recessed clips 12 is formed by welding two clips onto the outer periphery of the semicircular bracket 11, with a spacing of 0.4m between adjacent recessed clips 12. Anchor rods 4 are fitted inside the recessed clips 12 for connecting adjacent semicircular brackets 11. The semicircular bracket 11 has first base feet 13 at both ends, and first connecting holes 131 on the first base feet 13.

[0035] The straight edge support 2 includes a 4m wide straight support 21 made of pressed steel. The top of the straight support 21 is provided with a top foot 22 and the bottom is provided with a second bottom foot 23. The top foot 22 is provided with a second connecting hole 221 that is adapted to the first connecting hole 131.

[0036] The airbag 3 includes a cylindrical airbag skin 31. A male airbag connector 32 and a female airbag connector 33 are respectively provided at both ends of the airbag skin 31. To ensure proper shaping and tight sealing during airbag connection, a limiting wire 34 is provided inside the airbag skin 31 for connecting the male and female airbag connectors 32 and 33. Connection indicator lines 35 are also brushed on both ends of the outer periphery of the airbag skin 31 to indicate the connection position of adjacent airbag connectors. The female airbag connector 33 is annular, with a connector groove 331 inside the annulus. The male airbag connector 32 includes a connector base 322 located inside the airbag skin 31 and a connector insertion portion 321 protruding outside the airbag skin 31. Both the connector base 322 and the connector insertion portion 321 are annular with the same inner diameter, but the outer diameter of the connector base 322 is larger than the outer diameter of the connector insertion portion 321. The connector insertion portions 321 of adjacent airbags 3 are tightly inserted into the connector groove 331.

[0037] To provide effective protection and fixation for the pre-reserved tunnels within the filling material, the airbag assembly connection method of this invention includes two main processes: bracket overlap and airbag connection. The specific connection and usage method includes the following steps:

[0038] S1: Connecting airbags in series; multiple airbags 3 are connected in series with their long axis, and the connector plug 321 of the male airbag connector 32 of the adjacent airbag 3 is tightly inserted into the connector round groove 331 of the female airbag connector 33, so that the limiting twisted wire 34 in the airbag skin 31 is in a taut state, and the airbag skin 31 is moved so that the connection indicator line 35 of the adjacent airbag skin 31 is attached to cover the connector position of the airbag 3.

[0039] S2: Erect the support frame; First, place the two straight-edge support parts 2 vertically opposite each other, then place the semi-circular support part 1 on top of the straight-edge support part 2, so that the first connecting hole 131 and the second connecting hole 221 correspond in position. Use bolts to insert into the first connecting hole 131 and the second connecting hole 221 to connect and fix the semi-circular support part 1 and the straight-edge support part 2. Then, insert the two ends of the anchor rod 4 into the recessed clips 12 of the adjacent semi-circular support part 1 respectively and connect them in series. When the length of the anchor rod 4 is not enough, multiple anchor rods 4 can be welded or overlapped. Finally, place the erected semi-circular support part 1 and the straight-edge support part 2 at the middle position of the joint after the adjacent airbags 3 are connected in series, so that the airbag 3 is located in the support structure composed of the semi-circular support part 1 and the straight-edge support part 2, and so that the semi-circular support part 1 and the straight-edge support part 2 cover the joint position of the adjacent airbag 3.

[0040] S3: Inflate the airbag; After all the airbags 3 are connected in series, block the female airbag connector 33 of the innermost airbag 3, and then inflate the airbags 3 connected in series from the male airbag connector 32 of the outermost airbag 3 until the gas flows in and fills the entire series of airbags 3. Finally, block the male airbag connector 32 of the outermost airbag 3 to complete the inflation of the airbag 3.

[0041] S4: Filling slurry; Filling slurry is poured into the filling space in the roadway. After the filling slurry solidifies into a filling body, the reserved roadway is completed.

[0042] S5: Disassemble the airbag; After the reserved roadway is completed, pull out the blockage of the male airbag connector 32 of the outermost airbag 3 connected in series, extract the gas or liquid, and then separate the male airbag connector 32 and female airbag connector 33 of the adjacent airbags 3 one by one, and recover the airbag 3, semi-circular support 1, straight edge support 2 and anchor bolt 4.

Claims

1. An airbag assembly for pre-reserved roadways in underground filling bodies, characterized in that: The airbag assembly consists of several sets, which are reserved in the roadway. The airbag assembly includes a semi-circular support (1), a straight-edge support (2), an airbag (3), and an anchor bolt (4). The semicircular support (1) includes a semicircular bracket (11). Several sets of recessed clips (12) are evenly distributed on the outer periphery of the semicircular bracket (11). An anchor rod (4) is inserted into the recessed clip (12) for connecting adjacent semicircular brackets (11). The two ends of the semicircular bracket (11) are provided with first base feet (13), and the first base feet (13) are provided with first connecting holes (131). The straight edge support (2) includes a straight bracket (21), with a top foot (22) at the top and a second bottom foot (23) at the bottom; the top foot (22) is provided with a second connecting hole (221) that is adapted to the first connecting hole (131); The airbag (3) includes a cylindrical airbag skin (31), with a male airbag connector (32) and a female airbag connector (33) at both ends of the airbag skin (31). A limiting wire (34) is provided inside the airbag skin (31) for connecting the male airbag connector (32) and the female airbag connector (33). The female airbag connector (33) is annular, with a connector groove (331) inside the annular. The male airbag connector (32) includes a connector base (322) located inside the airbag skin (31) and a connector insertion part (321) protruding outside the airbag skin (31). The connector insertion parts (321) of adjacent airbags (3) are tightly inserted into the connector groove (331).

2. The airbag assembly for pre-reserved roadways in underground filling bodies as described in claim 1, characterized in that: Each set of the recessed cards (12) is formed by two cards fixed to the outer periphery of the semicircular bracket (11), and the distance between adjacent recessed cards (12) is 0.4-0.6m.

3. The airbag assembly for pre-reserved roadways in underground filling bodies as described in claim 2, characterized in that: The airbag skin (31) has connection indicator lines (35) at both ends of its outer periphery.

4. The airbag assembly for pre-reserved roadways in underground filling bodies as described in claim 3, characterized in that: Both the connector base (322) and the connector insertion part (321) are annular, with the same inner diameter. The outer diameter of the connector base (322) is larger than the outer diameter of the connector insertion part (321).

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