An air bag assembly for underground filling body reserved tunnel and its use method
By designing a reserved tunnel airbag assembly for filling mining, the problems of low construction efficiency of reserved tunnels and the prone to inflow of filling slurry in filling mining are solved, and more efficient tunnel forming and airbag recycling are achieved.
Patent Information
- Application Number
- CN202510196597.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-21
- Publication Date
- 2025-04-01
AI Technical Summary
In the filling mining method, the construction efficiency of the reserved tunnel is low and difficult. Due to the limited length of the airbag, it requires splicing, which easily leads to the filling slurry flowing into the gap, affecting the placeholding effect and recycling.
A downhole filling body reserved tunnel airbag assembly is designed, including a semicircular support part, a straight edge support part, a special airbag and an anchor. Through the plug-in design of the male airbag joint and the female airbag joint, the limit stranded wire and connection prompt wire in the airbag skin ensure that the airbag connection is tight and easy to inflate and form. The airbag assembly is protected within the support structure of the semicircular and straight-edged support to prevent the filling slurry from entering the gap.
The quality and efficiency of the lane formation of reserved tunnels in the filling body are improved, the construction is convenient and fast, the connection effect is good, and the airbag assembly is easy to disassemble and assemble, which improves the recycling and utilization efficiency.
Smart Images
Figure CN119737190A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the field of filling mining methods, and in particular to an air bag assembly for a reserved tunnel of an underground filling body and a use method thereof. Background Art
[0002] The backfill mining method is a kind of artificial support mining method, which mainly manages ground pressure by feeding backfill materials into the goaf, controls the collapse of surrounding rocks and surface movement, and carries out mining on the formed backfill body. This method is particularly suitable for mining ore bodies with unstable surrounding rocks and high-grade, scarce and precious ores, such as water bodies, railway trunk lines, ore bodies under major buildings and ore bodies with spontaneous combustion fire hazards. It has become the mainstream mining method for underground mines at home and abroad because of its strong adaptability, high ore recovery rate, low depletion rate, safe operation, and the ability to use industrial waste to protect the surface.
[0003] In order to improve mining efficiency and ensure mining safety, domestic mines that adopt the backfilling method mainly adopt the two-step mining method of "mining one by one". First, the first step of the approach or mining field is mined and backfilled with an approach or a mine room. After the backfilling body of the first step of the approach or mining field has strength, the second step of the approach or mining field is mined and backfilled. When this method is used for the second step of mining, it is often necessary to re-excavate the backfilling body in the approach or mining field of the first step to form the mining and cutting tunnel engineering for the second step of ore body mining. When the mining and cutting tunnel engineering is excavated in the backfilling body, there are many risks and shortcomings such as poor safety, great construction difficulty and low construction efficiency. Based on this, the reserved tunnel in the backfilling body of the first step is used as the mining and cutting tunnel engineering for the second step of ore body mining, that is, the reserved tunnel technology came into being. In addition, in order to ensure the formation of the tunnel, a filling air bag is placed under the support structure of the reserved tunnel as a placeholder to prevent the filling slurry from entering the tunnel and avoid secondary cleaning of the reserved tunnel. Although this method has high construction efficiency and low construction difficulty, due to the limited length of the airbags, the airbags in the reserved tunnels must be spliced before they can be occupied. After splicing, the filling slurry is easy to flow into the gaps between the airbags, thereby affecting the airbag's occupying effect and recycling. As a result, the reserved tunnels in the filling body need to be cleaned, corrected and formed before use, resulting in low tunnel quality and efficiency. Summary of the invention
[0004] The present invention provides an airbag assembly for a reserved tunnel of an underground filling body and a method for using the airbag assembly, the purpose of which is to fill and occupy the reserved tunnel through the airbag assembly, effectively maintain the stability of the reserved tunnel support structure, and improve the tunneling quality and efficiency of the reserved tunnel in the filling body.
[0005] To achieve its purpose, the present invention adopts the following technical solutions: An airbag assembly for a reserved tunnel of a filling body in a mine, the airbag assembly is a plurality of groups, reserved in the tunnel, and the airbag assembly comprises a semicircular support portion, a straight edge support portion, an airbag and an anchor rod; The semicircular support portion comprises a semicircular bracket, a plurality of groups of concave clips are evenly distributed on the outer circumference of the semicircular bracket, anchor rods are connected in the concave clips for connecting adjacent semicircular brackets, first base feet are provided at both ends of the semicircular bracket, and first connecting holes are provided on the first base feet; The straight edge support portion comprises a straight bracket, the top end of the straight bracket is provided with a top foot, and the bottom end is provided with a second bottom foot; the top foot is provided with a second connection hole adapted to the first connection hole; The airbag includes a cylindrical airbag skin, with a male airbag joint and a female airbag joint respectively provided at both ends of the airbag skin, and a limiting twisted wire is provided inside the airbag skin for connecting the male airbag joint and the female airbag joint; the female airbag joint is in a circular ring shape, with a circular joint groove provided inside the circular ring; the male airbag joint includes a joint base provided inside the airbag skin and a joint plug-in portion protruding outside the airbag skin, and the joint plug-in portions of adjacent airbags are tightly plugged into the joint circular grooves.
[0006] Furthermore, each group of the concave cards is formed by two cards fixedly connected on the outer circumference of the semicircular bracket, and the distance between adjacent concave cards is 0.4-0.6m.
[0007] Furthermore, connection prompt lines are provided at both ends of the outer periphery of the airbag skin.
[0008] Furthermore, the joint base and the joint plug-in portion are both in annular shape, have the same inner diameter, and the outer diameter of the joint base is greater than the outer diameter of the joint plug-in portion.
[0009] A method for using an air bag assembly for a reserved tunnel of a filling body in a mine, comprising the following steps: S1: Connecting airbags in series; connect several airbags in series along their long axes, and tightly insert the joint inserting parts of the male airbag joints in the adjacent airbags into the joint circular grooves of the female airbag joints, so that the limit twisted wires in the airbag skins are in a tight state, and the connection prompt wires of the adjacent airbag skins are fitted to cover the joint positions of the airbags; S2: erecting the support; firstly, place two straight-side support parts vertically opposite to each other, then place the semicircular support part on the top of the straight-side support part, so that the first connection hole and the second connection hole are located in corresponding positions, and the semicircular support part and the straight-side support part are connected and fixed by inserting bolts or pins into the first connection hole and the second connection hole, and then the two ends of the anchor rod are respectively inserted into the concave clamps of the adjacent semicircular support parts to be connected in series in sequence; finally, the semicircular support part and the straight-side support part that have been erected are placed in the middle of the joint after the adjacent airbags are connected in series, so that the airbags are located in the support structure composed of the semicircular support part and the straight-side support part; S3: Filling the airbags; after all the airbags are connected in series, the female airbag joint of the innermost airbag is blocked, and then gas or liquid is filled into the airbags connected in series from the male airbag joint of the outermost airbag until the gas or liquid flows into and fills the entire series of airbags, and finally the male airbag joint of the outermost airbag is blocked to complete the filling of the airbags; S4: Filling slurry: Filling the space in the tunnel with slurry, and after the slurry is solidified into a filling body, the reserved tunnel is completed; S5: Disassemble the airbags; after the reserved tunnel is completed, pull out the obstruction of the male airbag joint of the outermost airbag in series, extract the gas or liquid, and then separate the male airbag joints and female airbag joints of adjacent airbags one by one, and recover the airbags, semicircular support parts, straight-edge support parts and anchor rods.
[0010] Compared with the prior art, the present invention adopts the following technical solutions: 1. The airbag provided by the present invention is a special airbag, with a male airbag joint and a female airbag joint designed at both ends of the airbag, and a limited twisted wire inside the airbag, and a connection prompt line on the airbag skin, which ensures that adjacent airbags are tightly connected and convenient for inflation and molding. In addition, the airbag is protected in the support structure composed of the semicircular support part and the straight edge support part, so that the filling slurry cannot enter the gap of the airbag joint. After the airbags are connected in series, it is easy to inflate, the construction is convenient and rapid, the connection effect is good, and the quality and efficiency of the reserved lane in the filling body are improved.
[0011] 2. The present invention adopts a combination of a semicircular support part and a straight-edge support part to support the special airbag, and the adjacent semicircular support parts are connected by anchor rods. After support, it can not only effectively protect the airbag joint and the airbag body, but also have an obvious stabilizing and reinforcing effect on the support structure of the reserved tunnel. Together with the reserved tunnel support structure, it can resist the pressure transmitted by the filling slurry and the filling body, and has strong compressive resistance.
[0012] 3. The adjacent airbags provided by the present invention are easy to disassemble and assemble after being plugged in with the male airbag joint and the female airbag joint. The semicircular support part and the straight-edge support part only need a few basic bolts or pins to connect, so that the overall installation and recovery of the airbag assembly is fast, efficient and convenient, which improves the economy of the airbag occupying method in the reserved tunnel. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 It is a schematic diagram of the structure of the semicircular supporting portion in the airbag assembly of the present invention; Figure 2 It is a schematic diagram of the structure of the straight edge support portion in the airbag assembly of the present invention; Figure 3 It is a schematic diagram of the structure of the airbag in the airbag assembly of the present invention after the airbag is filled; Figure 4 for Figure 3 Left view of Figure 5 It is a front view of the male airbag joint in the airbag of the present invention; Figure 6 for Figure 5 Left view of Figure 7 It is a front view of the female airbag joint of the airbag of the present invention; Figure 8 for Figure 7 Right view of; Fig. 9 It is a schematic diagram of the structure after the semicircular supporting part and the straight edge supporting part of the present invention are connected; Fig.10 for Fig. 9 Left view of Fig.11 for Fig.10 Enlarged view of point A in the middle; Fig.12 It is a schematic diagram of adjacent airbags connected in series according to the present invention; Fig.13 This is a schematic diagram of the structure of the airbag assembly of the present invention after it is assembled; Fig.14 for Fig.13 Left view of In the figure: 1-semicircular support part; 11-semicircular bracket; 12-concave card; 13-first base; 131-first connecting hole; 2-straight edge support part; 21-straight bracket; 22-top foot; 23-second base; 221-second connecting hole; 3-airbag; 31-airbag skin; 32-male airbag connector; 33-female airbag connector; 34-limiting stranded wire; 35-connection prompt line; 321-connector plug-in part; 322-connector base; 331-connector circular groove; 4-anchor rod. DETAILED DESCRIPTION
[0014] The present invention will be further described below in conjunction with the accompanying drawings: like Figure 1-14 As shown, the present invention is an airbag assembly for a reserved tunnel of a filling body in a mine. The airbag assembly is in multiple groups and is reserved in the tunnel. The airbag assembly includes a semicircular support portion 1, a straight edge support portion 2, an airbag 3 and an anchor rod 4; The semicircular support part 1 comprises a semicircular bracket 11 with a width of 4m and pressed from steel. A plurality of groups of concave clips 12 are evenly distributed on the outer circumference of the semicircular bracket 11. Each group of concave clips 12 is welded by two clips on the outer circumference of the semicircular bracket 11. The spacing between adjacent concave clips 12 is 0.4m. An anchor rod 4 is clamped in the concave clip 12 for connecting adjacent semicircular brackets 11. First base feet 13 are provided at both ends of the semicircular bracket 11. First connecting holes 131 are provided on the first base feet 13. The straight edge support part 2 comprises a straight support 21 made of pressed steel and having a width of 4 m. The straight support 21 has a top foot 22 at the top and a second bottom foot 23 at the bottom. The top foot 22 has a second connection hole 221 matched with the first connection hole 131. The airbag 3 includes a cylindrical airbag skin 31, and a male airbag joint 32 and a female airbag joint 33 are respectively provided at both ends of the airbag skin 31. In order to ensure the shaping and gap sealing of the airbag 3 when connected, a limit twisted wire 34 is provided in the airbag skin 31 for connecting the male airbag joint 32 and the female airbag joint 33. At the same time, connection prompt lines 35 are brushed on both ends of the outer circumference of the airbag skin 31 to indicate the connection position of adjacent airbag joints. The female airbag joint 33 is in a circular ring shape, and a joint circular groove 331 is provided inside the circular ring; the male airbag joint 32 includes a joint base 322 provided in the airbag skin 31 and a joint plug-in part 321 protruding from the airbag skin 31. The joint base 322 and the joint plug-in part 321 are both in a circular ring shape, and the inner diameters of the two are the same. The outer diameter of the joint base 322 is larger than the outer diameter of the joint plug-in part 321. The joint plug-in parts 321 of adjacent airbags 3 are tightly plugged into the joint circular groove 331.
[0015] In order to form a good protection and fixation effect on the reserved lane in the filling body, the use method of the airbag assembly of the present invention includes two major processes: bracket overlap and airbag connection. The specific connection and use method includes the following steps: S1: Connecting airbags in series; connect multiple airbags 3 in series along their long axes, and tightly insert the joint plug-in portion 321 of the male airbag joint 32 in the adjacent airbags 3 into the joint circular groove 331 of the female airbag joint 33, so that the limit twisted wire 34 in the airbag skin 31 is in a taut state, and move the airbag skin 31 so that the connection prompt wire 35 of the adjacent airbag skin 31 fits together to cover the joint position of the airbag 3; S2: Setting up the support; firstly, place two straight-side support parts 2 vertically opposite to each other, and then place the semicircular support part 1 on the top of the straight-side support part 2, so that the positions of the first connecting hole 131 and the second connecting hole 221 correspond to each other, and use bolts inserted into the first connecting hole 131 and the second connecting hole 221 to connect and fix the semicircular support part 1 and the straight-side support part 2, and then respectively insert the two ends of the anchor rod 4 into the concave clips 12 of the adjacent semicircular support parts 1 and connect them in series in sequence. When the anchor rod 4 is not long enough, multiple anchor rods 4 can be welded or overlapped; finally, place the semicircular support part 1 and the straight-side support part 2 that have been set up in the middle 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 semicircular support part 1 and the straight-side support part 2, and the semicircular support part 1 and the straight-side support part 2 cover the joint position of the adjacent airbags 3; S3: filling the airbags; after all the airbags 3 are connected in series, the female airbag joint 33 of the innermost airbag 3 is blocked, and then gas is inflated into the airbags 3 connected in series from the male airbag joint 32 of the outermost airbag 3 until the gas flows into and fills the entire series of airbags 3, and finally the male airbag joint 32 of the outermost airbag 3 is blocked to complete the filling of the airbags 3; S4: Filling slurry: Filling the space in the tunnel with slurry, and after the slurry is solidified into a filling body, the reserved tunnel is completed; S5: Disassemble the airbag; after the reserved tunnel is completed, pull out the blockage of the male airbag joint 32 of the outermost airbag 3 in series, extract the gas or liquid, and then separate the male airbag joint 32 and the female airbag joint 33 of the adjacent airbags 3 one by one, and recover the airbag 3, the semicircular support part 1, the straight edge support part 2 and the anchor rod 4.
Claims
1. An airbag assembly for a reserved tunnel of a filling body in a mine, characterized in that: The airbag components are in groups and are reserved in the tunnel. The airbag components include a semicircular support portion (1), a straight edge support portion (2), an airbag (3) and an anchor rod (4); The semicircular support portion (1) comprises a semicircular support (11), a plurality of groups of concave clips (12) are equidistantly distributed on the outer circumference of the semicircular support (11), anchor rods (4) are clamped in the concave clips (12) for connecting adjacent semicircular supports (11), first base feet (13) are provided at both ends of the semicircular support (11), and first connection holes (131) are provided on the first base feet (13); The straight edge support portion (2) comprises a straight support (21), the straight support (21) having a top foot (22) at the top and a second bottom foot (23) at the bottom; the top foot (22) having a second connection hole (221) matched with the first connection hole (131); The airbag (3) comprises an airbag skin (31) in a cylindrical shape, with a male airbag joint (32) and a female airbag joint (33) respectively provided at two ends of the airbag skin (31), and a limit twisted wire (34) provided inside the airbag skin (31) for connecting the male airbag joint (32) and the female airbag joint (33); the female airbag joint (33) is in a circular ring shape, and a joint circular groove (331) is provided inside the circular ring; the male airbag joint (32) comprises a joint base (322) provided inside the airbag skin (31) and a joint plug-in portion (321) protruding outside the airbag skin (31), and the joint plug-in portions (321) of adjacent airbags (3) are tightly plugged into the joint circular groove (331).
2. An airbag assembly for a reserved tunnel for underground filling body as claimed in claim 1, characterized in that: Each group of the concave cards (12) is formed by two cards being fixedly connected on the outer circumference of a semicircular bracket (11), and the distance between adjacent concave cards (12) is 0.4-0.6m.
3. An airbag assembly for a reserved tunnel for underground filling body as claimed in claim 2, characterized in that: Connection prompt lines (35) are provided at both ends of the outer periphery of the airbag skin (31).
4. An airbag assembly for a reserved tunnel for underground filling body as claimed in claim 3, characterized in that: The joint base (322) and the joint plug-in portion (321) are both annular in shape, have the same inner diameter, and the outer diameter of the joint base (322) is greater than the outer diameter of the joint plug-in portion (321).
5. The method for using the airbag assembly for a reserved tunnel for underground filling body according to any one of claims 1 to 4, characterized in that: The following steps are involved: S1: connecting the airbags in series; connecting a plurality of airbags (3) in series along their long axes, and tightly inserting the joint plug-in portion (321) of the male airbag joint (32) in the adjacent airbags (3) into the joint circular groove (331) of the female airbag joint (33), so that the limit twisted wire (34) in the airbag skin (31) is in a taut state, and the connection prompt wire (35) of the adjacent airbag skin (31) is in contact with each other to cover the joint position of the airbag (3); S2: erecting a support; firstly, placing two straight-side support parts (2) vertically opposite to each other, then placing a semicircular support part (1) on top of the straight-side support part (2) so that the first connection hole (131) and the second connection hole (221) are located in correspondence with each other, and using bolts or pins to insert the first connection hole (131) and the second connection hole (221) to connect and fix the semicircular support part (1) and the straight-side support part (2), and then respectively inserting the two ends of the anchor rod (4) into the concave clips (12) of the adjacent semicircular support parts (1) and sequentially connecting them in series; finally, placing the erected semicircular support part (1) and the straight-side support part (2) in the middle of the joint after the adjacent airbags (3) are connected in series, so that the airbags (3) are located in the support structure composed of the semicircular support part (1) and the straight-side support part (2); S3: filling the airbags; after all the airbags (3) are connected in series, the female airbag joint (33) of the innermost airbag (3) is blocked, and then gas or liquid is filled into the series-connected airbags (3) from the male airbag joint (32) of the outermost airbag (3) until the gas or liquid flows into and fills the entire series-connected airbags (3), and finally the male airbag joint (32) of the outermost airbag (3) is blocked to complete the filling of the airbags (3); S4: Filling slurry: Filling the space in the tunnel with slurry, and after the slurry is solidified into a filling body, the reserved tunnel is completed; S5: disassembling the airbags; after the reserved tunnel is completed, the obstruction of the male airbag joint (32) of the outermost airbag (3) in series is pulled out, and the gas or liquid is extracted. Then, the male airbag joints (32) and female airbag joints (33) of adjacent airbags (3) are separated one by one, and the airbags (3), the semicircular support portion (1), the straight edge support portion (2) and the anchor rod (4) are recovered.