A pressure regulating gas chamber for closed wall of goaf area

Abstract

The present invention discloses a pressure regulating gas chamber of a closed wall of a goaf area, comprising an explosion-proof wall, an auxiliary closed wall, a pressure equalizing gas chamber, a first extraction pipeline, and a second extraction pipeline; an auxiliary closed wall is arranged outside the explosion-proof wall, and a pressure equalizing gas chamber is formed between the explosion-proof wall and the auxiliary closed wall; a first extraction pipeline and a second extraction pipeline are arranged on the auxiliary closed wall, the first extraction pipeline and the second extraction pipeline run through the auxiliary closed wall, the inner ends of the first extraction pipeline and the second extraction pipeline are both extended into the pressure equalizing gas chamber, and the outer ends of the first extraction pipeline and the second extraction pipeline are both extended to the outside of the auxiliary closed wall; a first extraction gate valve and a second extraction gate valve are respectively arranged on the outer ends of the first extraction pipeline and the second extraction pipeline. The present invention has the characteristics of avoiding gas accumulation in front of the explosion-proof wall, effectively preventing gas overflow in the goaf, solving the hidden danger of spontaneous combustion in the goaf, and providing a strong guarantee for the fire prevention and extinguishing management of mines.

Description

Technical Field

[0001] The present invention relates to a goaf closed wall pressure regulating gas chamber, in particular to a goaf closed wall pressure regulating gas chamber which can avoid gas accumulation in front of an explosion-proof wall, effectively prevent gas overflow in the goaf, solve the hidden danger of spontaneous combustion in the goaf, and provide a strong guarantee for mine fire prevention and extinguishing management. Background Art

[0002] During the coal mining process, after the parking lot air door was removed, the closed wall of the wind tunnel was on the air inlet side. The pressure difference of the closed wall was in a balanced pressure state before, and then changed to -330pa. The pressure difference in the goaf changed greatly, which brought hidden dangers to the fire prevention and gas on-site management of the goaf. At the same time, due to the influence of factors such as the mine ventilation system, temperature, and atmospheric pressure, the pressure in the goaf is unstable. The closed wall of the goaf and the surrounding rock will have cracks due to the impact of mining, which may easily cause gas overflow in the goaf. Therefore, the ventilation area takes the changes of various factors on site as the starting point, and uses the construction of a pressure regulating air chamber as a means to facilitate the pressure control of the goaf, ensuring that the goaf is always in a low pressure difference or balanced pressure state, thereby ensuring that the fire prevention, gas and other work in the goaf are in a safe and controllable state. Summary of the invention

[0003] The purpose of the present invention is to provide a goaf closed wall pressure regulating gas chamber which can avoid gas accumulation in front of the explosion-proof wall, effectively prevent gas overflow in the goaf, solve the hidden danger of spontaneous combustion in the goaf, and provide a strong guarantee for mine fire prevention and extinguishing management.

[0004] The purpose of the present invention can be achieved through the following technical solutions:

[0005] A pressure regulating gas chamber for a closed wall of a goaf area, comprising an explosion-proof wall, an auxiliary closed wall, a pressure equalizing gas chamber, a first extraction pipeline, a second extraction pipeline, a first extraction gate valve, a second extraction gate valve, an auxiliary closed wall observation pipe, an explosion-proof wall observation pipe, an explosion-proof wall measure pipe, an observation pipe connected to the goaf area, a measure pipe connected to the goaf area, an auxiliary closed wall waterproof pipe, and an explosion-proof wall drain pipe;

[0006] An auxiliary closed wall is arranged outside the explosion-proof wall, and a pressure-equalizing air chamber is formed between the explosion-proof wall and the auxiliary closed wall; a first extraction pipeline and a second extraction pipeline are arranged on the auxiliary closed wall, the first extraction pipeline and the second extraction pipeline penetrate the auxiliary closed wall, the inner ends of the first extraction pipeline and the second extraction pipeline are extended into the pressure-equalizing air chamber, and the outer ends of the first extraction pipeline and the second extraction pipeline are extended to the outside of the auxiliary closed wall; a first extraction gate valve and a second extraction gate valve are arranged on the outer ends of the first extraction pipeline and the second extraction pipeline, respectively;

[0007] A return air tunnel wind shield wall is arranged outside the auxiliary closed wall, and the outer ends of the first extraction pipeline and the second extraction pipeline are extended to the outside of the return air tunnel wind shield wall;

[0008] The explosion-proof wall is provided with an explosion-proof wall measure pipe, an explosion-proof wall observation pipe, and an explosion-proof wall drain pipe, which penetrate the explosion-proof wall, the auxiliary closed wall, and the pressure-equalizing air chamber; the inner ends of the explosion-proof wall measure pipe, the explosion-proof wall observation pipe, and the explosion-proof wall drain pipe extend to the inside of the explosion-proof wall; the outer ends of the explosion-proof wall measure pipe, the explosion-proof wall observation pipe, and the explosion-proof wall drain pipe all extend to the outside of the auxiliary closed wall;

[0009] The explosion-proof wall is provided with an observation pipe for connecting the goaf area and a measure pipe for connecting the goaf area, which penetrate the explosion-proof wall, the auxiliary closed wall and the pressure-equalizing air chamber; the inner ends of the observation pipe for connecting the goaf area and the measure pipe for connecting the goaf area extend into the goaf area inside the explosion-proof wall; the outer ends of the observation pipe for connecting the goaf area and the measure pipe for connecting the goaf area both extend to the outside of the auxiliary closed wall;

[0010] The auxiliary closed wall is provided with an auxiliary closed wall observation tube and an auxiliary closed wall waterproof tube, which penetrate the auxiliary closed wall, and the inner ends of the auxiliary closed wall observation tube and the auxiliary closed wall waterproof tube extend into the pressure equalizing air chamber; the outer ends of the auxiliary closed wall observation tube and the auxiliary closed wall waterproof tube extend to the outside of the auxiliary closed wall;

[0011] The distance between the explosion-proof wall and the auxiliary enclosed wall is 0.5m;

[0012] The specifications of the first extraction pipeline and the second extraction pipeline are both 10-inch pipes;

[0013] The auxiliary closed wall observation tube, the explosion-proof wall observation tube, the explosion-proof wall measure tube, the connected goaf area observation tube, the connected goaf area measure tube, the auxiliary closed wall waterproof tube, and the explosion-proof wall drain tube are all 2-inch tubes;

[0014] The outer ends of the explosion-proof wall observation tube and the observation tube connected to the goaf are connected via a U-shaped differential pressure gauge;

[0015] A bundled tube connected differential pressure gauge is installed on the auxiliary closed wall observation tube.

[0016] The present invention provides a pressure regulating gas chamber for a closed wall of a goaf, which has the characteristics of avoiding gas accumulation in front of an explosion-proof wall, effectively preventing gas overflow in the goaf, solving the hidden danger of spontaneous combustion in the goaf, and providing a strong guarantee for mine fire prevention and extinguishing management. The beneficial effects of the present invention are as follows: the air pressure in the pressure-equalizing air chamber is regulated by the first extraction gate valve and the second extraction gate valve through the first extraction pipeline and the second extraction pipeline; the first extraction gate valve and the second extraction gate valve are adjusted to increase or decrease the pressure in the pressure-equalizing air chamber, thereby increasing or decreasing the pressure in the goaf, so that the pressure difference in the goaf is always in a low pressure difference and equalized pressure state, reducing air leakage into the goaf, and achieving safe and controllable fire prevention and gas management; an auxiliary closed wall is added outside the explosion-proof wall, and a pressure-equalizing air chamber is formed between the explosion-proof wall and the auxiliary closed wall, reducing the pressure inside and outside the explosion-proof wall from the original 330 Pa to 0-40 Pa, reducing safety risks, avoiding gas accumulation in front of the explosion-proof wall, effectively preventing gas overflow in the goaf, solving the hidden danger of spontaneous combustion in the goaf, and providing a strong guarantee for mine fire prevention and extinguishing management;

[0017] Observe the pressure difference change in the goaf area through the explosion-proof wall observation tube and the U-type differential pressure gauge connected to the goaf observation tube;

[0018] Connect a differential pressure gauge through the bundle tube on the auxiliary closed wall observation tube to observe the pressure difference changes in the air chamber. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

[0020] Figure 1 The present invention is a schematic structural diagram of a pressure regulating air chamber in a closed wall of a goaf area. DETAILED DESCRIPTION

[0021] The purpose of the present invention can be achieved through the following technical solutions:

[0022] A pressure regulating gas chamber in the closed wall of a goaf, see Figure 1 , including explosion-proof wall 1, auxiliary closed wall 2, equalizing air chamber 3, first extraction pipeline 4, second extraction pipeline 5, first extraction gate valve 6, second extraction gate valve 7, auxiliary closed wall observation pipe 8, explosion-proof wall observation pipe 9, explosion-proof wall measure pipe 10, goaf-connected observation pipe 11, goaf-connected measure pipe 12, auxiliary closed wall waterproof pipe 13, explosion-proof wall drain pipe 14;

[0023] An auxiliary closed wall 2 is arranged on the outside of the explosion-proof wall 1, and a pressure-equalizing air chamber 3 is formed between the explosion-proof wall 1 and the auxiliary closed wall 2; a first extraction pipeline 4 and a second extraction pipeline 5 are arranged on the auxiliary closed wall 2, and the first extraction pipeline 4 and the second extraction pipeline 5 penetrate the auxiliary closed wall 2, and the inner ends of the first extraction pipeline 4 and the second extraction pipeline 5 extend into the pressure-equalizing air chamber 3, and the outer ends of the first extraction pipeline 4 and the second extraction pipeline 5 extend to the outside of the auxiliary closed wall 2; a first extraction gate valve 6 and a second extraction gate valve 7 are arranged on the outer ends of the first extraction pipeline 4 and the second extraction pipeline 5, respectively; the pressure-equalizing air chamber is regulated by the first extraction gate valve 6 and the second extraction gate valve 7 through the first extraction pipeline 4 and the second extraction pipeline 5 3; adjust the first extraction gate valve 6 and the second extraction gate valve 7 to increase or decrease the pressure in the equalizing air chamber 3, so as to increase or decrease the pressure in the goaf, so that the pressure difference in the goaf is always in a low pressure difference and equalized pressure state, reduce the air leakage into the goaf, and achieve safe and controllable fire prevention and gas management; add an auxiliary closed wall 2 on the outside of the explosion-proof wall 1, and form an equalizing air chamber 3 between the explosion-proof wall 1 and the auxiliary closed wall 2, so as to reduce the pressure inside and outside the explosion-proof wall 1 from the original 330pa to 0-40pa, reduce safety risks, avoid gas accumulation in front of the explosion-proof wall, effectively prevent gas overflow in the goaf, solve the hidden danger of natural fire in the goaf, and provide a strong guarantee for mine fire prevention and extinguishing management;

[0024] A return air tunnel windshield wall is arranged outside the auxiliary closed wall 2, and the outer ends of the first extraction pipeline 4 and the second extraction pipeline 5 are extended to the outside of the return air tunnel windshield wall;

[0025] The explosion-proof wall 1 is provided with an explosion-proof wall measure pipe 10, an explosion-proof wall observation pipe 9, and an explosion-proof wall drain pipe 14, which penetrate the explosion-proof wall 1, the auxiliary closed wall 2, and the pressure-equalizing air chamber 3; the inner ends of the explosion-proof wall measure pipe 10, the explosion-proof wall observation pipe 9, and the explosion-proof wall drain pipe 14 extend to the inside of the explosion-proof wall 1; the outer ends of the explosion-proof wall measure pipe 10, the explosion-proof wall observation pipe 9, and the explosion-proof wall drain pipe 14 all extend to the outside of the auxiliary closed wall 2;

[0026] The explosion-proof wall 1 is provided with an observation pipe 11 for connecting the goaf area and a measure pipe 12 for connecting the goaf area. The observation pipe 11 for connecting the goaf area and the measure pipe 12 for connecting the goaf area penetrate the explosion-proof wall 1, the auxiliary closed wall 2, and the pressure equalizing chamber 3; the inner ends of the observation pipe 11 for connecting the goaf area and the measure pipe 12 for connecting the goaf area extend to the goaf area inside the explosion-proof wall 1; the outer ends of the observation pipe 11 for connecting the goaf area and the measure pipe 12 for connecting the goaf area extend to the outside of the auxiliary closed wall 2;

[0027] The auxiliary closed wall 2 is provided with an auxiliary closed wall observation tube 8 and an auxiliary closed wall waterproof tube 13, which penetrate the auxiliary closed wall 2, and the inner ends of the auxiliary closed wall observation tube 8 and the auxiliary closed wall waterproof tube 13 extend into the pressure equalizing air chamber 3; the outer ends of the auxiliary closed wall observation tube 8 and the auxiliary closed wall waterproof tube 13 extend to the outside of the auxiliary closed wall 2;

[0028] The distance between the explosion-proof wall 1 and the auxiliary closed wall 2 is 0.5m;

[0029] The specifications of the first extraction pipeline 4 and the second extraction pipeline 5 are both 10-inch pipes;

[0030] The auxiliary closed wall observation tube 8, the explosion-proof wall observation tube 9, the explosion-proof wall measure tube 10, the connected goaf observation tube 11, the connected goaf measure tube 12, the auxiliary closed wall waterproof tube 13, and the explosion-proof wall drain tube 14 are all 2-inch tubes;

[0031] The outer ends of the explosion-proof wall observation tube 9 and the observation tube 11 connected to the goaf are connected by a U-shaped differential pressure gauge, and the pressure difference change of the goaf is observed by the U-shaped differential pressure gauge connected to the explosion-proof wall observation tube 9 and the observation tube 11 connected to the goaf;

[0032] The auxiliary closed wall observation tube 8 is equipped with a bundled tube connected differential pressure gauge, through which the bundled tube connected differential pressure gauge on the auxiliary closed wall observation tube 8 is used to observe the pressure difference change in the air chamber.

[0033] Working principle of the present invention:

[0034] In the present invention, an auxiliary enclosed wall 2 is arranged outside the explosion-proof wall 1, and a pressure-equalizing air chamber 3 is formed between the explosion-proof wall 1 and the auxiliary enclosed wall 2; a first extraction pipeline 4 and a second extraction pipeline 5 are arranged on the auxiliary enclosed wall 2, and the first extraction pipeline 4 and the second extraction pipeline 5 penetrate the auxiliary enclosed wall 2, and the inner ends of the first extraction pipeline 4 and the second extraction pipeline 5 are extended into the pressure-equalizing air chamber 3, and the outer ends of the first extraction pipeline 4 and the second extraction pipeline 5 are extended to the outside of the auxiliary enclosed wall 2; a first extraction gate valve 6 and a second extraction gate valve 7 are respectively arranged on the outer ends of the first extraction pipeline 4 and the second extraction pipeline 5; the pressure-equalizing air is regulated by the first extraction gate valve 6 and the second extraction gate valve 7 through the first extraction pipeline 4 and the second extraction pipeline 5 Air pressure in chamber 3; adjust the first extraction gate valve 6 and the second extraction gate valve 7 to increase or decrease the pressure in the equalizing air chamber 3, so as to increase or decrease the pressure in the goaf, so that the pressure difference in the goaf is always in a low pressure difference and equalized pressure state, reduce air leakage into the goaf, and achieve safe and controllable fire prevention and gas management; add an auxiliary closed wall 2 on the outside of the explosion-proof wall 1, and form an equalizing air chamber 3 between the explosion-proof wall 1 and the auxiliary closed wall 2, so as to reduce the pressure inside and outside the explosion-proof wall 1 from the original 330pa to 0-40pa, reduce safety risks, avoid gas accumulation in front of the explosion-proof wall, effectively prevent gas overflow in the goaf, solve the hidden danger of natural fire in the goaf, and provide a strong guarantee for mine fire prevention and extinguishing management;

[0035] Observe the pressure difference change in the goaf area through the U-shaped differential pressure gauge connected to the explosion-proof wall observation tube 9 and the goaf observation tube 11;

[0036] The pressure difference change in the air chamber is observed by connecting a differential pressure gauge through the bundle tube on the auxiliary closed wall observation tube 8.

[0037] The present invention provides a pressure regulating gas chamber for a closed wall of a goaf, which has the characteristics of avoiding gas accumulation in front of an explosion-proof wall, effectively preventing gas overflow in the goaf, solving the hidden danger of spontaneous combustion in the goaf, and providing a strong guarantee for mine fire prevention and extinguishing management. The beneficial effects of the present invention are as follows: the air pressure in the pressure-equalizing air chamber is regulated by the first extraction gate valve and the second extraction gate valve through the first extraction pipeline and the second extraction pipeline; the first extraction gate valve and the second extraction gate valve are adjusted to increase or decrease the pressure in the pressure-equalizing air chamber, thereby increasing or decreasing the pressure in the goaf, so that the pressure difference in the goaf is always in a low pressure difference and equalized pressure state, reducing air leakage into the goaf, and achieving safe and controllable fire prevention and gas management; an auxiliary closed wall is added outside the explosion-proof wall, and a pressure-equalizing air chamber is formed between the explosion-proof wall and the auxiliary closed wall, reducing the pressure inside and outside the explosion-proof wall from the original 330 Pa to 0-40 Pa, reducing safety risks, avoiding gas accumulation in front of the explosion-proof wall, effectively preventing gas overflow in the goaf, solving the hidden danger of spontaneous combustion in the goaf, and providing a strong guarantee for mine fire prevention and extinguishing management;

[0038] Observe the pressure difference change in the goaf area through the explosion-proof wall observation tube and the U-type differential pressure gauge connected to the goaf observation tube;

[0039] Connect a differential pressure gauge through the bundle tube on the auxiliary closed wall observation tube to observe the pressure difference changes in the air chamber.

[0040] The above contents are merely examples and explanations of the structure of the present invention. The technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the structure of the invention or exceed the scope defined by the claims, they should all fall within the protection scope of the present invention.

Claims

1. A pressure regulating gas chamber for a closed wall of a goaf area, comprising an explosion-proof wall (1), an auxiliary closed wall (2), a pressure equalizing gas chamber (3), a first extraction pipeline (4), a second extraction pipeline (5), a first extraction gate valve (6), a second extraction gate valve (7), an auxiliary closed wall observation pipe (8), an explosion-proof wall observation pipe (9), an explosion-proof wall measure pipe (10), a goaf area observation pipe (11), a goaf area measure pipe (12), an auxiliary closed wall waterproof pipe (13), and an explosion-proof wall drain pipe (14), characterized in that; An auxiliary enclosed wall (2) is arranged outside the explosion-proof wall (1), and a pressure-equalizing air chamber (3) is formed between the explosion-proof wall (1) and the auxiliary enclosed wall (2); a first extraction pipeline (4) and a second extraction pipeline (5) are arranged on the auxiliary enclosed wall (2), the first extraction pipeline (4) and the second extraction pipeline (5) penetrate the auxiliary enclosed wall (2), the inner ends of the first extraction pipeline (4) and the second extraction pipeline (5) extend into the pressure-equalizing air chamber (3), and the outer ends of the first extraction pipeline (4) and the second extraction pipeline (5) extend to the outside of the auxiliary enclosed wall (2); a first extraction gate valve (6) and a second extraction gate valve (7) are arranged on the outer ends of the first extraction pipeline (4) and the second extraction pipeline (5), respectively; a return air tunnel wind shield wall is arranged outside the auxiliary enclosed wall (2), and the outer ends of the first extraction pipeline (4) and the second extraction pipeline (5) extend to the outside of the return air tunnel wind shield wall.

2. The goaf closed wall pressure regulating gas chamber according to claim 1, characterized in that: The explosion-proof wall (1) is provided with an explosion-proof wall measure pipe (10), an explosion-proof wall observation pipe (9), and an explosion-proof wall drainage pipe (14); the explosion-proof wall measure pipe (10), the explosion-proof wall observation pipe (9), and the explosion-proof wall drainage pipe (14) penetrate the explosion-proof wall (1) and the pressure-equalizing air chamber (3); the inner ends of the explosion-proof wall measure pipe (10), the explosion-proof wall observation pipe (9), and the explosion-proof wall drainage pipe (14) extend to the inner side of the explosion-proof wall (1); and the outer ends of the explosion-proof wall measure pipe (10), the auxiliary closed wall observation pipe (8), and the auxiliary closed wall waterproof pipe (13) all extend to the outer side of the auxiliary closed wall (2).

3. The pressure regulating gas chamber of the closed wall of the goaf according to claim 1, characterized in that: The explosion-proof wall (1) is provided with an observation pipe (11) and a measure pipe (12) for connecting to the goaf area. The observation pipe (11) and the measure pipe (12) for connecting to the goaf area penetrate the explosion-proof wall (1), the auxiliary closed wall (2), and the pressure equalizing chamber (3). The inner ends of the observation pipe (11) and the measure pipe (12) for connecting to the goaf area extend into the goaf inside the explosion-proof wall (1); and the outer ends of the observation pipe (11) and the measure pipe (12) for connecting to the goaf area extend to the outside of the auxiliary closed wall (2).

4. The goaf closed wall pressure regulating gas chamber according to claim 1, characterized in that: The auxiliary closed wall (2) is provided with an auxiliary closed wall observation tube (8) and an auxiliary closed wall waterproof tube (13); the auxiliary closed wall observation tube (8) and the auxiliary closed wall waterproof tube (13) penetrate the auxiliary closed wall (2); the inner ends of the auxiliary closed wall observation tube (8) and the auxiliary closed wall waterproof tube (13) extend into the pressure equalizing air chamber (3); and the outer ends of the auxiliary closed wall observation tube (8) and the auxiliary closed wall waterproof tube (13) extend to the outside of the auxiliary closed wall (2).

5. The goaf closed wall pressure regulating gas chamber according to claim 1, characterized in that: The distance between the explosion-proof wall (1) and the auxiliary closed wall (2) is 0.5 m.

6. The pressure regulating gas chamber of the closed wall of the goaf according to claim 1, characterized in that: The specifications of the first extraction pipeline (4) and the second extraction pipeline (5) are both 10-inch pipes.

7. The pressure regulating gas chamber of the closed wall of the goaf according to claim 1, characterized in that: The auxiliary closed wall observation tube (8), the explosion-proof wall observation tube (9), the explosion-proof wall measure tube (10), the connected goaf area observation tube (11), the connected goaf area measure tube (12), the auxiliary closed wall waterproof tube (13), and the explosion-proof wall drainage tube (14) are all 2-inch tubes.

8. The goaf enclosed wall pressure regulating gas chamber according to claim 1, characterized in that: The outer ends of the explosion-proof wall observation tube (9) and the goaf-connected observation tube (11) are connected via a U-shaped differential pressure gauge.

9. The goaf closed wall pressure regulating gas chamber according to claim 1, characterized in that: The auxiliary closed wall observation tube (8) is provided with a bundled tube connected differential pressure gauge.

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