AHB type mine gas control borehole construction internal and external extraction and blowout prevention device

Abstract

This invention relates to the field of gas extraction technology. It discloses an AHB-type mine gas control borehole extraction and blowout prevention device, including an in-hole extraction blowout preventer, a self-sealing gas-water-slag separator and collector, and a U-shaped extraction and waterproofing device. The self-sealing gas-water-slag separator and collector includes a gas separation chamber and a disc-type separation chamber distributed vertically. The disc-type separation chamber contains six self-shaking filter screens that rotate around the center of the disc-type separation chamber. Through the obstruction and contact of the self-shaking filter screens by protrusions, impurities on the filter screens are shaken off, ensuring the filter screens have a self-cleaning purpose in the initial stage. Simultaneously, the filter screens assist in the removal of coal dust, thereby avoiding blockages caused by insufficient filtration efficiency and preventing gas leakage during long-term extraction.

Description

Technical Field

[0001] This invention relates to the field of gas extraction technology, specifically to an AHB-type mine gas control borehole extraction and blowout prevention device. Background Technology

[0002] The advanced construction and decompression drilling all adopt the traditional construction process of "orifice extractor + separation extractor". When large amounts of coal and high-concentration gas are suddenly injected, the orifice is often blocked, the slag extraction is not smooth, and the pressure inside the hole rises sharply, resulting in frequent accidents of coal and gas exceeding the limit, which seriously threatens the safe production of the mine. In the process of slag removal, the traditional extraction box is prone to gas leakage inside, which often causes the roadway to exceed the limit.

[0003] Collectors are often connected to the end of the extractor to filter coal slag and discharge gas. During continuous extraction, the clogging rate of the filter screen is related to the discharge volume and duration. After clogging, the gas extraction passage and the residual gas extraction passage inside the coal slag cannot be discharged smoothly. At this time, gas leakage is likely to occur during the filter screen treatment process. At the same time, when the amount of coal powder collected inside the collector increases during long-term extraction or eruption, a small amount of gas is also likely to be discharged through the gaps in the coal powder during the discharge of coal powder. Summary of the Invention

[0004] The purpose of this invention is to provide an AHB-type mine gas control borehole drilling and extraction anti-blowout device to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] The AHB type mine gas control borehole construction borehole extraction and blowout prevention device includes an in-hole extraction blowout preventer, a self-sealing gas-water-slag separator and collector, and a U-shaped extraction and waterproof device, wherein the in-hole extraction blowout preventer, the self-sealing gas-water-slag separator and collector, and the U-shaped extraction and waterproof device are connected in sequence.

[0007] The in-hole extraction blowout preventer includes an extraction pipe installed at the borehole, and an extraction hose and a slag discharge hose are fixedly connected to the side of the extraction pipe.

[0008] The self-sealing gas-water-slag separator includes a gas separation chamber and a disc separation chamber distributed vertically. The disc separation chamber is fixedly connected to an air inlet branch pipe and a slag inlet branch pipe on its side. The air inlet branch pipe is connected to the extraction hose, the slag inlet branch pipe is connected to the slag discharge hose, and the gas separation chamber is connected to the disc separation chamber.

[0009] The disc-shaped separation chamber is equipped with six self-shaking filter screens that rotate around the center of the disc-shaped separation chamber. Several angled protrusions are fixedly connected to the bottom of the inner wall of the disc-shaped separation chamber, which are used to make instantaneous contact with the protrusions and shake off the particles when the self-shaking filter screens rotate.

[0010] The U-shaped extraction and waterproofing device includes a low negative pressure extraction branch pipe and a U-shaped pipe. One end of the U-shaped pipe is connected to the low negative pressure extraction branch pipe, and the other end of the U-shaped pipe extends to the top of the gas separation chamber and is connected to the gas separation chamber.

[0011] As a further embodiment of the present invention: the air inlet branch pipe and the slag inlet branch pipe are distributed vertically on the side of the disc separation chamber near the extraction pipe. A central shaft is rotatably connected to the center of the disc separation chamber. Six self-shaking filter screens are distributed in a ring around the central shaft. The self-shaking filter screens are rotatably connected to the central shaft through a one-way elastic hinge mechanism. The air inlet branch pipe and the slag inlet branch pipe are located above and below the central shaft, respectively.

[0012] As a further embodiment of the present invention: a primary slag discharge pipe is fixedly connected to the bottom of the disc-type separation chamber, a bent discharge pipe is connected to one side of the primary slag discharge pipe, a cap is hinged to the top of the bent discharge pipe, an extension collector is fixedly connected to the bottom of the disc-type separation chamber on the side away from the air inlet branch pipe, the extension collector is connected to the disc-type separation chamber, the protrusion covers the extension collector, and the lowest end of the extension collector is connected to the primary slag discharge pipe through a slag discharge connecting pipe.

[0013] As a further embodiment of the present invention: the gas separation chamber is provided with two inclined screens inside, a baffle plate is fixedly connected to the top of the inner wall of the gas separation chamber, the bottom of the gas separation chamber is connected to the opening directly above the disc separation chamber through a contraction port, and the self-sealing gas-water-slag separation and collection device also includes a liquid supply pipeline, which is connected to a nozzle and a water gun respectively. The nozzle is located directly above the gas separation chamber, and the water gun is located on one side of the primary slag discharge pipe.

[0014] As a further embodiment of the present invention: the two vertical parts of the U-shaped tube are connected by horizontally distributed air passages, a secondary slag discharge pipe is fixedly connected to the center of the arc-shaped bottom of the U-shaped tube, and a self-draining pipe is connected to one side of the secondary slag discharge pipe.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] The rotating self-shaking filter screen rotates within the disc-type separation chamber. During this process, impurities in the gas entering the chamber through the intake branch pipe are filtered and then rotated downwards, propelling the pulverized coal while simultaneously filtering the gas within it. When the filter screen reaches the raised block, the impurities are shaken off through the block's obstruction and contact with the screen. This ensures the filter screen has a self-cleaning function in the initial stage, while also assisting the pulverized coal. This prevents blockages caused by insufficient filtration, which could lead to gas leakage during prolonged extraction.

[0017] By influencing the liquid, impurities are caused to flow through the liquid, which then lifts the plate at the end of the bent discharge pipe, discharging the liquid along with coal powder impurities. This ensures that there are no excessive impurities inside the disc separation chamber. At the same time, the liquid seals the bottom of the primary slag discharge pipe, making it difficult for gas to pass through, thus achieving the bottom discharge sealing function, enabling continuous discharge, and preventing gas leakage. This allows the device to be used in long-term gas extraction operations, ensuring safe operation.

[0018] After the gas enters through the U-shaped tube, the liquid accumulates inside the arc of the U-shaped tube due to gravity. At this time, the gas directly enters the other end of the U-shaped tube through the gas inlet pipe and is then extracted through the low negative pressure extraction branch pipe. Meanwhile, the self-draining pipe is connected to the automatic waterproof device. The automatic waterproof device can control the waterproofing based on the liquid level inside the secondary slag discharge pipe, ensuring that the liquid level inside the secondary slag discharge pipe is always higher than the height of the self-draining pipe. This keeps the self-draining pipe in an airtight state, forming a closed-loop drainage system. This method is also used for long-term continuous gas extraction, while preventing gas leakage and enabling the device to operate continuously. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 A three-dimensional cross-sectional schematic diagram of the internal and external extraction and blowout prevention device for AHB-type mine gas control borehole construction.

[0021] Figure 2 A schematic diagram of the use of the internal and external extraction and blowout prevention device for AHB type mine gas control borehole construction;

[0022] In the diagram: 100, in-hole extraction blowout preventer; 200, self-sealing gas-water-slag separator and collector; 300, U-shaped extraction waterproof device; 1, extraction pipe; 11, extraction hose; 12, slag discharge hose; 2, gas separation chamber; 21, baffle plate; 22, inclined screen; 23, contraction port; 3, disc separation chamber; 31, air inlet branch pipe; 32, slag inlet branch pipe; 33, protrusion; 34, extension collector; 341, slag discharge connecting pipe; 35, primary slag discharge pipe; 351, bent discharge pipe; 4, self-shaking filter screen; 41, central shaft; 42, one-way elastic hinge mechanism; 5, liquid supply pipeline; 51, nozzle; 52, water gun; 6, low negative pressure extraction branch pipe; 7, U-shaped pipe; 71, air passage pipe; 72, secondary slag discharge pipe; 73, self-draining pipe. Detailed Implementation

[0023] It includes an in-hole extraction blowout preventer 100, a self-sealing gas-water-slag separator and collector 200, and a U-shaped extraction waterproof device 300, which are connected in sequence.

[0024] The in-hole extraction blowout preventer 100 is inserted into the borehole to extract gas and coal dust residue. At this time, a large amount of gas and coal dust residue enter the self-sealing gas-water-slag separator and extractor 200 for collection and temporary storage. Meanwhile, during the extraction, the gas is treated secondary by the U-shaped extraction waterproof device 300.

[0025] The in-hole extraction blowout preventer 100 includes an extraction pipe 1 installed at the borehole, and an extraction hose 11 and a slag discharge hose 12 are fixedly connected to the side of the extraction pipe 1.

[0026] The gas discharged through the extraction pipe 1 enters the interior of the self-sealing gas-water-slag separator 200 through the extraction hose 11, while the residue and gas discharged through the extraction pipe 1 are discharged into the interior of the self-sealing gas-water-slag separator 200 through the slag discharge hose 12.

[0027] The self-sealing gas-water-slag separator and collector 200 includes a gas separation chamber 2 and a disc separation chamber 3 distributed vertically. An air inlet branch pipe 31 and a slag inlet branch pipe 32 are fixedly connected to the side of the disc separation chamber 3. The air inlet branch pipe 31 is connected to the extraction hose 11, and the slag inlet branch pipe 32 is connected to the slag discharge hose 12. The gas separation chamber 2 and the disc separation chamber 3 are connected. Inside the disc separation chamber 3 are six self-shaking filter screens 4 that rotate around the center of the disc separation chamber 3. Several angled distributions are fixedly connected to the bottom of the inner wall of the disc separation chamber 3. The protrusion 33 is used to make instantaneous contact with the self-shaking filter 4 when it rotates to shake off the particles. The air inlet branch pipe 31 and the slag inlet branch pipe 32 are distributed vertically on the side of the disc separation chamber 3 near the extraction pipe 1. The disc separation chamber 3 is rotatably connected to the center shaft 41. Six self-shaking filter screens 4 are distributed in a ring around the center shaft 41. The self-shaking filter screens 4 are rotatably connected to the center shaft 41 through a one-way elastic hinge mechanism 42. The air inlet branch pipe 31 and the slag inlet branch pipe 32 are located above and below the center shaft 41, respectively.

[0028] In the initial stage, the gas extracted through the extraction hose 11 contains a small amount of coal dust impurities and enters the disc separation chamber 3. At the same time, a large amount of coal dust impurities also enter the disc separation chamber 3. Since the disc separation chamber 3 is internally connected to a self-shaking filter screen 4, the self-shaking filter screen 4 rotates towards the side of the air inlet branch pipe 31. At this time, the six self-shaking filter screens 4 divide the interior of the disc separation chamber 3 into six sections. The air inlet branch pipe 31 and the slag inlet branch pipe 32 are distributed vertically. The gas ejected carrying a small amount of coal dust will be filtered through the upper self-shaking filter screen 4. After filtration, the gas is drawn up into the gas separation chamber 2 by suction. At this time, the gas ejected from the slag inlet branch pipe 32... The large amount of coal slag contains only a small amount of residual gas. At this time, the coal slag will fall as the self-shaking filter screen 4 rotates, pushing the coal slag downwards. At the same time, the gas will be drawn up through multiple filters to the inside of the gas separation chamber 2. When the self-shaking filter screen 4 rotates to the side near the bottom of the slag inlet branch pipe 32, it will be affected by the protrusion 33. At this time, the one-way elastic hinge mechanism 42 at the central shaft 41 will rotate at a certain angle when the self-shaking filter screen 4 is obstructed by the slag inlet branch pipe 32. At this time, the one-way elastic hinge mechanism 42 rotates and stores energy. The protrusion 33 is arc-shaped. After the self-shaking filter screen 4 rotates to the tilt and separates from the protrusion 33, the self-shaking filter... As the screen 4 disengages from the limiting effect of the protrusion 33, the self-shaking filter screen 4 is rapidly reset due to the elastic influence of the torsion spring inside the one-way elastic hinge mechanism 42, and then contacts the next protrusion 33. At this time, the self-shaking filter screen 4 shakes, thereby shaking off the surface impurities directly filtered by the air inlet branch pipe 31 into the interior of the primary slag discharge pipe 35. Simultaneously, the self-shaking filter screen 4 continues to rotate with the central shaft 41 and begins to rise after passing through the primary slag discharge pipe 35. After rising, the self-shaking filter screen 4 continues to deform under the influence of the protrusion 33 until it encounters the next protrusion 33 and makes instantaneous contact. At this time, the shaking surface is the direct spray surface of the slag inlet branch pipe 32. Due to the shaking, impurities are shaken downwards and collected in the primary slag discharge pipe 35. The self-shaking filter screen 4, after being cleaned by the protrusion 33, rotates to the air inlet branch pipe 31 and continues to move. The central shaft 41 is powered by an explosion-proof motor and is connected to the disc separation chamber 3 by an explosion-proof bearing. The frame of the self-shaking filter screen 4 and the protrusion 33 are made of plastic to avoid sparks from metal collisions. In this way, a large amount of coal slag and coal slag inside the gas extraction gas can be filtered in the initial stage. At the same time, the self-shaking action greatly extends the filtration clogging cycle, thereby effectively improving filtration efficiency and filtration life.

[0029] The U-shaped extraction and waterproofing device 300 includes a low negative pressure extraction branch pipe 6 and a U-shaped pipe 7. One end of the U-shaped pipe 7 is connected to the low negative pressure extraction branch pipe 6, and the other end of the U-shaped pipe 7 extends to the top of the gas separation chamber 2 and is connected to the gas separation chamber 2.

[0030] One end of the U-shaped pipe 7 is connected to the flange interface of the low negative pressure extraction branch pipe 6 in the construction roadway, and the other end of the U-shaped pipe 7 is connected to the extraction port of the gas separation chamber 2 to realize continuous extraction of gas sprayed inside the hole.

[0031] A primary slag discharge pipe 35 is fixedly connected to the bottom of the disc-type separation chamber 3. A bent discharge pipe 351 is connected to one side of the primary slag discharge pipe 35. A cap is hinged to the top of the bent discharge pipe 351. An extension collector 34 is fixedly connected to the bottom of the disc-type separation chamber 3 on the side away from the air inlet branch pipe 31. The extension collector 34 is connected to the disc-type separation chamber 3. A protrusion 33 covers the extension collector 34. The lowest end of the extension collector 34 is connected to the primary slag discharge pipe 35 through a slag discharge connecting pipe 341. Two inclined screens 22 are installed inside the gas separation chamber 2. A baffle plate 21 is fixedly connected to the top of the inner wall of the gas separation chamber 2. The bottom of the gas separation chamber 2 is connected to the opening at the top of the disc-type separation chamber 3 through a contraction port 23. The self-sealing gas-water-slag separation collector 200 also includes a liquid supply pipe 5. The liquid supply pipe 5 is connected to a nozzle 51 and a water gun 52. The nozzle 51 is located directly above the gas separation chamber 2, and the water gun 52 is located on one side of the primary slag discharge pipe 35.

[0032] Residue and materials inside the disc-type separation chamber 3 enter the primary slag discharge pipe 35 and accumulate inside. To achieve continuous discharge and avoid blockage, a bent discharge pipe 351 is installed on one side of the primary slag discharge pipe 35. The end of the bent discharge pipe 351 is bent upwards, and the port of the primary slag discharge pipe 35 is also upwards, forming a U-shaped pipe. At this time, the water gun 52 quickly sprays liquid into the primary slag discharge pipe 35, causing the liquid level inside the primary slag discharge pipe 35 to rise sharply. At this time, the liquid level at the end of the bent discharge pipe 351 is level with the liquid level inside the primary slag discharge pipe 35. The nozzle 51 continuously sprays water, causing impurities and dust to fall into the primary slag discharge pipe 35. Due to the influence of the liquid, the impurities flow through the liquid, and the liquid pushes up the plate at the end of the bent discharge pipe 351, discharging the liquid along with coal powder impurities, thereby ensuring the disc-type separation chamber... There are no excessive impurities inside the separation chamber 3. At the same time, the liquid seals the bottom of the primary slag discharge pipe 35, making it difficult for gas to pass through, thereby achieving the bottom discharge sealing function, realizing continuous discharge, and avoiding gas leakage. This allows the device to be used for long-term gas extraction work, ensuring the safety of use. Meanwhile, after the gas is filtered by the self-shaking filter screen 4, it moves upward by suction. At this time, the gas undergoes secondary filtration through the inclined screen 22. At the same time, the spray from the nozzle 51 can further reduce the dust in the extracted gas. Meanwhile, the liquid is affected by gravity and flows into the primary slag discharge pipe 35 after being collected through the contraction port 23, further playing a sealing role. The purpose of setting the baffle plate 21 is to avoid the direct spraying of water mist, which would cause the extraction port to be directly pumped to the U-shaped pipe 7, resulting in an excessively high liquid level in the U-shaped pipe 7.

[0033] The two vertical parts of the U-shaped tube 7 are connected by horizontally distributed air passage pipes 71. A secondary slag discharge pipe 72 is fixedly connected to the center of the arc-shaped bottom of the U-shaped tube 7, and a self-draining pipe 73 is connected to one side of the secondary slag discharge pipe 72.

[0034] After the gas enters through the U-shaped tube 7, the liquid will accumulate inside the arc of the U-shaped tube 7 due to gravity. At this time, the gas will directly enter the other end of the U-shaped tube 7 through the gas inlet pipe 71, and then be extracted through the low negative pressure extraction branch pipe 6. Meanwhile, the self-draining pipe 73 is connected to the automatic waterproof device. The automatic waterproof device can control the waterproofing according to the liquid level inside the secondary slag discharge pipe 72, so that the liquid level inside the secondary slag discharge pipe 72 is always higher than the height of the self-draining pipe 73, thus keeping the self-draining pipe 73 in an air-sealed state, thereby forming a closed-loop drainage system. This method is also used for long-term continuous gas extraction, while avoiding gas leakage, enabling the device to operate continuously.

[0035] Usage process of this invention

[0036] For the sake of brevity, some terms will be introduced.

[0037] The valve at the connection between the end of the U-shaped pipe 7 and the low negative pressure extraction branch pipe 6 is butterfly valve A, the valve at the suction port at the top of the gas separation chamber 2 is butterfly valve B, and the valve at the end of the air inlet branch pipe 31 is butterfly valve C.

[0038] The extraction pipe 1 is inserted into the borehole to continuously extract gas. The extracted gas enters the disc separation chamber 3 through the extraction hose 11 and the gas inlet branch pipe 31, while the pulverized coal enters the disc separation chamber 3 through the slag discharge hose 12 and the slag inlet branch pipe 32.

[0039] When using static pressure water drilling in rock sections, fully open butterfly valve A, appropriately open butterfly valve B, fully open butterfly valve C, and adjust the extraction flow.

[0040] When the explosion-proof motor is turned on, the central shaft 41 rotates slowly. The ejected gas, carrying a small amount of coal dust, is filtered through the self-shaking filter screen 4 above. After filtration, the gas is drawn upwards into the gas separation chamber 2. At this time, the large amount of coal slag ejected from the slag inlet branch pipe 32 contains only a small amount of residual gas. The coal slag will then descend with the rotation of the self-shaking filter screen 4, pushing it downwards. Simultaneously, the gas is drawn upwards through multiple filters into the gas separation chamber 2. When the self-shaking filter screen 4 rotates to the lower side near the slag inlet branch pipe 32, it is acted upon by the protrusion 33. At this time, the one-way flow at the central shaft 41... When the self-shaking filter screen 4 is obstructed by the slag inlet branch pipe 32, the elastic hinge mechanism 42 will rotate at a certain angle. At this time, the one-way elastic hinge mechanism 42 rotates and stores energy, while the protrusion 33 is arc-shaped. When the self-shaking filter screen 4 rotates to the tilt and separates from the protrusion 33, the self-shaking filter screen 4 is released from the limiting effect of the protrusion 33. The self-shaking filter screen 4 is quickly reset by the elastic effect of the torsion spring in the one-way elastic hinge mechanism 42, and then contacts the subsequent protrusion 33. At this time, the self-shaking filter screen 4 shakes, thereby shaking off the surface impurities that have been directly filtered by the air inlet branch pipe 31 into the interior of the primary slag discharge pipe 35.

[0041] When drilling reaches 0.5 to 1.0 meters into the protruding coal seam, stop drilling, open nozzle 51 and water gun 52, allowing the liquid inside the liquid supply pipeline 5 to enter the gas separation chamber 2 and the primary slag discharge pipe 35 to form a seal. Gradually open butterfly valve B to adjust the water column pressure and negative pressure, so that the liquid level inside the primary slag discharge pipe 35 is higher than the liquid level inside the bent discharge pipe 351, causing the liquid to push out of the top cover at the end of the bent discharge pipe 351, and discharge the impurities to the outside through the water source. At this time, the gas is affected by the seal of the liquid when the coal dust impurities are discharged, so the gas cannot enter the interior of the bent discharge pipe 351, thus preventing the gas from being discharged. At this time, the coal dust impurities are continuously discharged, thereby avoiding blockage of the disc separation chamber 3, allowing for long-term extraction and discharge, and preventing leakage.

[0042] If too much slag accumulates inside the primary slag discharge pipe 35, the discharge valve at the bottom of the primary slag discharge pipe 35 can be opened and closed repeatedly to discharge slag in an orderly manner. However, the water gun 52 must be turned on to ensure that the primary slag discharge pipe 35 is blocked. In this state, the main problem is that the accumulated residue inside the disc separation chamber 3 affects the normal rotation and operation of the disc separation chamber 3. For some special terrain areas, such as when an extension collector 34 is fixed on the outside of the disc separation chamber 3, the coal powder pushed by the self-shaking filter screen 4 is first pushed to the primary slag discharge pipe 35. At the same time, the residual coal powder and the shaken coal powder fall into the interior of the extension collector 34. Under the influence of gravity, it enters the primary slag discharge pipe 35 through the slag discharge connecting pipe 341. The extension collector 34 increases the volume, or an extension chamber can be set directly between the primary slag discharge pipe 35 and the disc separation chamber 3 to increase the accumulation volume.

[0043] After being filtered by the disc separator 3, the gas enters the U-shaped pipe 7. At this time, the liquid inside the gas separator 2 is affected by the extraction of the low negative pressure extraction branch pipe 6, causing the liquid to accumulate at the bend of the U-shaped pipe 7 due to gravity. Meanwhile, the gas enters the low negative pressure extraction branch pipe 6 through the gas pipe 71 and is discharged. At this time, the water level is continuously drained through the self-draining pipe 73 on the side of the secondary slag discharge pipe 72, so that the gas will not leak.

[0044] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. AHB type mine gas control borehole drilling and extraction anti-blowout device, characterized in that: It includes an in-hole extraction blowout preventer (100), a self-sealing gas-water-slag separator and collector (200), and a U-shaped extraction waterproof device (300), wherein the in-hole extraction blowout preventer (100), the self-sealing gas-water-slag separator and collector (200), and the U-shaped extraction waterproof device (300) are connected in sequence. The in-hole extraction blowout preventer (100) includes an extraction pipe (1) installed at the borehole, and an extraction hose (11) and a slag discharge hose (12) are fixedly connected to the side of the extraction pipe (1). The self-sealing gas-water-slag separator (200) includes a gas separation chamber (2) and a disc separation chamber (3) distributed vertically. The disc separation chamber (3) is fixedly connected to an air inlet branch pipe (31) and a slag inlet branch pipe (32) on its side. The air inlet branch pipe (31) is connected to the extraction hose (11), the slag inlet branch pipe (32) is connected to the slag discharge hose (12), and the gas separation chamber (2) is connected to the disc separation chamber (3). The disc-type separation chamber (3) is equipped with six self-shaking filter screens (4) that rotate around the center of the disc-type separation chamber (3). The bottom of the inner wall of the disc-type separation chamber (3) is fixedly connected with several angularly distributed protrusions (33) to make instantaneous contact with the protrusions (33) to shake off particles when the self-shaking filter screen (4) rotates. The U-shaped extraction waterproof device (300) includes a low negative pressure extraction branch pipe (6) and a U-shaped pipe (7). One end of the U-shaped pipe (7) is connected to the low negative pressure extraction branch pipe (6), and the other end of the U-shaped pipe (7) extends to the top of the gas separation chamber (2) and is connected to the gas separation chamber (2). The air inlet branch pipe (31) and the slag inlet branch pipe (32) are distributed vertically on the side of the disc separation chamber (3) near the extraction pipe (1). The disc separation chamber (3) is rotatably connected to a central shaft (41) at its center. Six self-shaking filter screens (4) are distributed in a ring around the central shaft (41). The self-shaking filter screens (4) are rotatably connected to the central shaft (41) through a one-way elastic hinge mechanism (42). The air inlet branch pipe (31) and the slag inlet branch pipe (32) are located above and below the central shaft (41), respectively. The two vertical parts of the U-shaped tube (7) are connected by a horizontally distributed air passage pipe (71). A secondary slag discharge pipe (72) is fixedly connected to the center of the arc-shaped bottom of the U-shaped tube (7). A self-draining pipe (73) is connected to one side of the secondary slag discharge pipe (72).

2. The AHB type mine gas control borehole drilling and extraction anti-blowout device according to claim 1, characterized in that: A primary slag discharge pipe (35) is fixedly connected directly below the disc-type separation chamber (3). A bent discharge pipe (351) is connected to one side of the primary slag discharge pipe (35). A cap is hinged to the top of the bent discharge pipe (351). An extension collector (34) is fixedly connected to the lower side of the disc-type separation chamber (3) away from the air inlet branch pipe (31). The extension collector (34) is connected to the disc-type separation chamber (3). The protrusion (33) covers the extension collector (34). The lowest end of the extension collector (34) is connected to the primary slag discharge pipe (35) through a slag discharge connecting pipe (341).

3. The AHB-type mine gas control borehole drilling and extraction anti-blowout device according to claim 2, characterized in that: The gas separation chamber (2) is equipped with two inclined screens (22) inside. A baffle plate (21) is fixedly connected to the top of the inner wall of the gas separation chamber (2). The bottom of the gas separation chamber (2) is connected to the opening directly above the disc separation chamber (3) through a contraction port (23). The self-sealing gas-water-slag separation collector (200) also includes a liquid supply pipeline (5). The liquid supply pipeline (5) is connected to a nozzle (51) and a water gun (52). The nozzle (51) is located directly above the gas separation chamber (2), and the water gun (52) is located on one side of the primary slag discharge pipe (35).

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