Retaining wall sealing type drainage device for goaf

Abstract

The utility model discloses a retaining wall sealing type drainage device for a goaf. Relates to the technical field of underground mining and comprises a three-way pipe, the three-way pipe comprises a main pipe, a first branch pipe and a second branch pipe, the first branch pipe is communicated with the end of the main pipe, the second branch pipe is communicated with the middle section of the main pipe, and a desilting valve is arranged at the end, close to the second branch pipe, of the main pipe; the main pipe is buried at the bottom of a goaf retaining wall, the first branch pipe extends into a goaf, and the second branch pipe is arranged outside the goaf. Through the arrangement of the three-way pipe, a water seal is constructed between the goaf and the construction area, accumulated water in the goaf is discharged according to the communicating vessel principle, and poisonous and harmful gas in the goaf cannot be discharged; meanwhile, the device automatically drains water in the whole process, and manual control is not needed; and a small part of residual accumulated water is not enough to influence the strength of the filling body.

Description

Technical Field

[0001] The utility model relates to the technical field of underground mining, in particular to a sealed drainage device for a retaining wall in a goaf area. Background Art

[0002] Sealing goaf in underground mining is the simplest and most practical method. Traditionally, goaf sealing methods have involved constructing reinforced concrete retaining walls within the connecting tunnels of the goaf. This solid wall isolates the goaf and prevents air shock waves from impacting the underground production area.

[0003] However, water easily accumulates in goafs, which has a certain impact on the strength of subsequent filling materials. To address the problem of water accumulation in goafs, the traditional method is usually to leave drainage holes at the bottom of the concrete retaining wall to drain the water in the goaf. However, from the perspective of mine safety, traditional drainage methods also cause toxic and harmful gases in the goaf to be discharged through the drainage holes at the bottom of the retaining wall. The long-term emission of toxic and harmful gases increases the risk of suffocation and fire for underground workers, greatly affecting production safety. At the same time, the existing method of leaving drainage holes will cause gravel and sand to accumulate and block the drainage holes, resulting in problems such as poor drainage. Utility Model Content

[0004] In order to drain the accumulated water in the goaf without discharging toxic and harmful gases, the present application provides a goaf retaining wall sealed drainage device.

[0005] The present application provides a sealed drainage device for a goaf retaining wall, which adopts the following technical solution:

[0006] A sealed drainage device for a goaf retaining wall comprises a main pipe, a first branch pipe and a second branch pipe, wherein the first branch pipe is connected to the end of the main pipe, the second branch pipe is connected to the middle section of the main pipe, and a sand discharge valve is provided at the end of the main pipe near the second branch pipe; the main pipe is buried at the bottom of the goaf retaining wall, the first branch pipe extends into the goaf, and the second branch pipe is arranged outside the goaf.

[0007] Optionally, a screen is arranged around the outer side of the branch pipe.

[0008] Optionally, a flushing pipe is buried in the goaf retaining wall, the inlet of the flushing pipe is arranged outside the goaf, and the outlet is arranged in the goaf and directly opposite to the insertion branch pipe 1.

[0009] Optionally, a baffle is rotatably connected to the outlet of the flushing pipe via a hinge, the rotation axis of the baffle is arranged in the horizontal direction, and the baffle rotates to close the outlet of the flushing pipe; a limiting component for limiting the rotation of the baffle is also provided on the flushing pipe.

[0010] Optionally, the limiting assembly includes a magnet, which is arranged at the outlet of the flushing pipe. When the magnet adsorbs the baffle, the baffle closes the outlet of the flushing pipe.

[0011] Optionally, the limiting assembly further includes a torsion spring, which is disposed at the hinge. When the torsion spring is in a natural state, the baffle is adsorbed on the magnet.

[0012] In summary, this application has the following beneficial technical effects:

[0013] This application uses the setting of a three-way pipe to build a water seal between the goaf and the construction area, and uses the principle of communicating vessels to drain the accumulated water in the goaf without discharging toxic and harmful gases in the goaf; at the same time, the device automatically drains the water throughout the process and does not require manual operation; and the small amount of accumulated water left is not enough to affect the strength of the filling body. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is the overall structural diagram of a sealed drainage device for a goaf retaining wall in the present application;

[0015] Figure 2 yes Figure 1 Enlarged view of the baffle section of the middle scour pipe.

[0016] Description of reference numerals:

[0017] 1. Main pipe; 11. Sand discharge valve; 2. Branch pipe 1; 3. Branch pipe 2; 4. Flushing pipe; 41. Baffle; 42. Magnet; 5. Retaining wall; 6. Screen barrel. DETAILED DESCRIPTION

[0018] The following is combined with Figure 1-2 This application is described in further detail.

[0019] An embodiment of the present application discloses a sealed drainage device for a goaf retaining wall, which is placed between the goaf and the construction area and is used to discharge accumulated water in the goaf without discharging toxic gases. The basic principle is to use a tee pipe to construct a water seal, and the tee pipe includes a main pipe 1, branch pipe 1 2 and branch pipe 2 3. Branch pipe 1 2 is connected to the end of the main pipe 1, and branch pipe 2 3 is connected to the middle section of the main pipe 1. A sand discharge valve 11 is provided at the end of the main pipe 1 near branch pipe 2 3. When in use, the main pipe 1 is first pre-buried between the goaf and the construction area, and then a goaf retaining wall 5 is set above the main pipe 1. At this time, branch pipe 1 2 extends into the goaf, and branch pipe 2 3 is set in the construction area.

[0020] When the water in the goaf overflows the top of branch pipe 1 2 and is higher than the lowest open end of branch pipe 2 3, the water will be discharged. At this time, the toxic and harmful gases float above the water and will not be discharged from the goaf. Since some toxic and harmful gases will dissolve in the water, the discharged water also needs to be treated. Therefore, a canal is dug in the construction area to lead the discharged water to the treatment area.

[0021] In order to prevent the gravel in the goaf from clogging the tee pipe, a screen barrel 6 is provided outside the branch pipe 2. The screen barrel 6 is buckled outside the branch pipe 2. A screen is provided on the screen barrel 6. The screen allows water to flow through while isolating the gravel. At the same time, in order to prevent fine sand and gravel from clogging the main pipe 1, a flushing pipe 4 is also pre-buried in the retaining wall 5. The inlet and outlet of the flushing pipe 4 are respectively set in the construction area and the goaf. The outlet end passes through the screen barrel 6 and is inserted into the branch pipe 2.

[0022] When sand and gravel clog the main pipe 1, the sand discharge valve 11 of the main pipe 1 is opened, and water is pumped into the inlet of the flushing pipe 4 at high pressure to flush out the fine sand and gravel from the main pipe 1. After flushing is completed, the sand discharge valve 11 is flushed and closed. At the same time, in order to prevent toxic and harmful gases from entering the construction area through the flushing pipe 4, a baffle 41 is connected to the outlet of the flushing pipe 4 through a hinge. The baffle 41 rotates to close or open the outlet. At the same time, a torsion spring is provided at the hinge. When the torsion spring is in a natural state, the baffle 41 closes the outlet, so that the baffle 41 reaches a normally closed state. At the same time, in order to further enhance the sealing effect, a magnet 42 is also provided at the outlet of the flushing pipe 4, and the magnet 42 can adsorb the baffle 41. However, when high-pressure water is pumped in, the baffle 41 is flushed open, so that the high-pressure water can flush into the main pipe 1 to complete the flushing.

[0023] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A sealed drainage device for a goaf retaining wall, characterized by: The three-way pipe comprises a main pipe (1), a branch pipe 1 (2) and a branch pipe 2 (3); the branch pipe 1 (2) is connected to the end of the main pipe (1), the branch pipe 2 (3) is connected to the middle section of the main pipe (1), and a sand discharge valve (11) is provided at the end of the main pipe (1) near the branch pipe 2 (3); the main pipe (1) is buried at the bottom of a retaining wall (5) in a goaf area, the branch pipe 1 (2) extends into the goaf area, and the branch pipe 2 (3) is arranged outside the goaf area.

2. The sealed drainage device for a goaf retaining wall according to claim 1, characterized in that: The outer side of the branch pipe 1 (2) is surrounded by a screen barrel (6), and a screen mesh is provided on the screen barrel (6).

3. The sealed drainage device for a goaf retaining wall according to claim 2, characterized in that: A flushing pipe (4) is also buried in the goaf retaining wall (5). The inlet of the flushing pipe (4) is arranged outside the goaf, and the outlet is arranged in the goaf and passes through the screen barrel and is inserted into the branch pipe 1 (2).

4. The sealed drainage device for a goaf retaining wall according to claim 3, characterized in that: The outlet of the flushing pipe (4) is rotatably connected to a baffle (41) via a hinge, the rotation axis of the baffle (41) being arranged in a horizontal direction, and the baffle (41) is rotated to close the outlet of the flushing pipe (4); a limiting assembly for limiting the rotation of the baffle (41) is also provided on the flushing pipe (4).

5. The sealed drainage device for a goaf retaining wall according to claim 4, characterized in that: The limiting assembly comprises a magnet (42) which is arranged at the outlet of the flushing pipe (4). When the magnet (42) adsorbs the baffle (41), the baffle (41) closes the outlet of the flushing pipe (4).

6. The sealed drainage device for goaf retaining wall according to claim 5, characterized in that: The limiting assembly further comprises a torsion spring, which is arranged at the hinge. When the torsion spring is in a natural state, the baffle (41) is adsorbed on the magnet (42).

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