Tree-shaped flow-collecting type upper corner insertion pipe extraction structure

Abstract

The utility model discloses a tree-shaped flow-collecting type upper corner inserting pipe extraction structure, which relates to the technical field of coal mining and comprises a goaf, a working face, a support arranged between the goaf and the working face, and an upper corner blocking wall body on the working face. And two extraction pipelines are pressed on the upper corner plugging wall body in a stepping manner and are used for extracting upper corner gas. According to the tree-shaped flow-collecting type upper corner insertion pipe extraction structure, a three-way connector is additionally arranged on an extraction pipeline with the diameter being 315 mm, a branch pipeline with the diameter being 160 mm is connected in an extending mode, a box-type flow collector is installed at the tail end of the branch pipeline, and five hoses with different lengths are installed at one end of the flow collector and stretch into different positions in a blocked wall for extraction; the five-way hose extends to cover the optimal mining area in the wall body, the gas concentration in the wall body can be intercepted to the maximum extent, and safe mining of a working face is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of coal mining, in particular to a tree-shaped flow-accumulating gas drainage structure at the upper corner Background Technique

[0002] At present, the common methods for gas drainage at the upper corner are single-line buried pipe or double-line "stepping" buried pipe technology at the upper corner, that is, two 315-mm-diameter drainage pipes are pressed in a stepping manner on the top of the sealing wall at the upper corner of the coal mining face. The pipe orifices extend into the sealing position for a depth of 6-12 m, and are hung close to the roadway roof for gas drainage at the upper corner. Based on the distribution of the "three zones" of spontaneous combustion of coal in the goaf, the optimal buried pipe depth and stepping distance at the upper corner are determined. With the construction of one sealing wall every day, the distance that the single-line or double-line pipes extend into the goaf cannot cover the best gas drainage area within the wall, resulting in the ineffective interception of gas between the constructed walls. If the roof of the working face comes under pressure or a gas-rich area is encountered, it is very likely to cause abnormal gas in the working face. Therefore, this application proposes a tree-shaped flow-accumulating gas drainage structure at the upper corner to solve the above problems. Content of the Utility Model

[0003] (1) Technical Problems to be Solved

[0004] Aiming at the deficiencies of the prior art, the utility model provides a tree-shaped flow-accumulating gas drainage structure at the upper corner, which solves the technical problems raised in the above background.

[0005] (2) Technical Solution

[0006] To achieve the above purposes, the technical solution adopted by the utility model is: a tree-shaped flow-accumulating gas drainage structure at the upper corner, including a goaf and a working face, a support arranged between the goaf and the coal mining face, and a sealing wall at the upper corner of the coal mining face. Two drainage pipes are pressed in a stepping manner on the sealing wall at the upper corner for gas drainage at the upper corner. One of the drainage pipes is provided with a tee joint. One end of the tee joint is connected to one end of a box-type flow collector through a branch pipe. The other end of the box-type flow collector is connected to five hoses, and the other ends of the five hoses extend deep into the sealing wall at the upper corner for gas drainage.

[0007] Preferably, the lengths of the five hoses are all different, and the port positions of the five hoses extending deep into the sealing wall at the upper corner are different. The diameter of the five hoses is 108 mm.

[0008] Preferably, the orifices of the two drainage pipes extend into the sealing wall at the upper corner for 6-12 m.

[0009] Preferably, the diameter of the drainage pipe is 315 mm.

[0010] Preferably, the branch pipe is a PE pipe with a diameter of 160 mm.

[0011] Preferably, the two gas drainage pipelines are hung closely against the roadway roof.

[0012] (III) Beneficial effects

[0013] The beneficial effects of the present utility model are as follows:

[0014] For this tree-shaped flow-accumulating gob-side gas drainage structure, a tee joint is added to a gas drainage pipeline with a diameter of 315 mm, and a branch pipeline with a diameter of 160 mm is extended. A box-type current collector is installed at the end of the branch pipeline. One end of the current collector is installed with five hoses of different lengths extending into different positions in the sealing wall for gas drainage. The five hoses can cover the best gas drainage area in the wall, intercept the gas concentration in the wall to the greatest extent, and ensure the safe coal mining of the working face. Description of the drawings

[0015] Figure 1 It is a schematic structural layout diagram of the present utility model.

[0016] In the figure: 1 goaf, 2 working face, 3 support, 4 gob-side sealing wall, 5 gas drainage pipeline, 6 tee joint, 7 branch pipe, 8 box-type current collector, 9 hose. Specific implementation manners

[0017] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0018] Such as Figure 1As shown in the figure, the utility model provides a technical solution: a tree-shaped flow-accumulating gob-side gas extraction structure, including a gob 1 and a working face 2, a support 3 arranged between the gob 1 and the coal mining working face 2, and a gob-side plugging wall 4 on the coal mining working face 2. Two extraction pipelines 5 are step-pressed on the gob-side plugging wall 4 for extracting gob-side gas. The diameter of the extraction pipeline 5 is 315 mm. The pipe orifices of the two extraction pipelines 5 extend into the gob-side plugging wall 4 by 6 - 12 m. The two extraction pipelines 5 are hung closely against the roadway roof. A tee joint 6 is provided on one of the extraction pipelines 5. One end of the tee joint 6 is connected to one end of a box-type flow collector 8 through a branch pipe 7. The branch pipe 7 is a PE pipe with a diameter of 160 mm. By adding a tee joint 6 to an extraction pipeline 5 with a diameter of 315 mm, one orifice of the tee joint 6 is connected through the branch pipe 7, and a box-type flow collector 8 is installed at the end of the branch pipe 7 for collecting the extracted gas. Five hoses 9 with different lengths at one end of the box-type flow collector 8 extend into different positions in the gob-side plugging wall 5 for extraction. The arrangement of the five hoses 9 can cover the best extraction area in the gob-side plugging wall 5. The other end of the box-type flow collector 8 is connected to the five hoses 9, and the other ends of the five hoses 9 extend into the gob-side plugging wall 4 for extraction. The lengths of the five hoses 9 are all different, and the positions of the ends of the five hoses 9 extending into the gob-side plugging wall 4 are different. The diameter of the five hoses 9 is 108 mm. The five hoses 9 with different lengths can cover the best extraction area in the wall, intercept the gas concentration in the wall to the greatest extent, and ensure the safe coal mining of the working face.

[0019] The operation steps of the utility model are as follows:

[0020] By adding a tee joint 6 to an extraction pipeline 5 with a diameter of 315 mm, one orifice of the tee joint 6 is connected through the branch pipe 7, and a box-type flow collector 8 is installed at the end of the branch pipe 7 for collecting the extracted gas. Five hoses 9 with different lengths at one end of the box-type flow collector 8 extend into different positions in the gob-side plugging wall 5 for extraction. The five hoses 9 cover the best extraction area in the gob-side plugging wall 5, intercept the gas concentration in the wall to the greatest extent, and ensure the safe coal mining of the working face.

[0021] In the description of the present utility model, it should be understood that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0022] In the present utility model, unless otherwise clearly defined and limited, for example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements. Unless otherwise clearly defined, for those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0023] Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A tree-like collecting type upper corner intubation extraction structure, comprising a goaf (1) and a working face (2), a support (3) arranged between the goaf (1) and the coal mining working face (2), and an upper corner blocking wall (4) on the coal mining working face (2), two extraction pipelines (5) are stepped and pressed on the upper corner blocking wall (4) for extracting upper corner gas, characterized in that: One of the extraction pipelines (5) is provided with a three-way interface (6), and the three-way interface (6) is connected to one end of a box-type current collector (8) through a branch pipe (7), and the other end of the box-type current collector (8) is connected to a five-way hose (9), and the other end of the five-way hose (9) penetrates into the upper corner blocking wall (4) for extraction.

2. According to claim 1, a tree-like current collecting type upper corner intubation extraction structure is characterized by: The lengths of the five hoses (9) are all different, and the positions of the ports of the five hoses (9) penetrating into the upper corner blocking wall (4) are different. The diameter of the hoses (9) is 108 mm.

3. The tree-like current collecting upper corner intubation extraction structure according to claim 1 is characterized in that: The pipe openings of the two extraction pipelines (5) extend 6-12 m into the upper corner blocking wall (4).

4. The tree-like current collecting upper corner intubation extraction structure according to claim 1 is characterized in that: The diameter of the extraction pipeline (5) is 315 mm.

5. The tree-like current collecting upper corner intubation extraction structure according to claim 1 is characterized in that: The branch pipe (7) is a PE pipe, and the diameter of the branch pipe (7) is 160 mm.

6. The tree-like current collecting upper corner intubation extraction structure according to claim 1, characterized in that: The two extraction pipelines (5) are hung close to the tunnel roof.

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