Fixed-point start-stop control dust removal system and method based on fully-mechanized face chute baffle

Abstract

The invention belongs to the technical field of coal mine dust treatment, and relates to a fixed-point start-stop-control dust removal system based on a fully-mechanized coal mining surface chute baffle, which comprises a hydraulic support and a scraper conveyer arranged on one side of the hydraulic support, and a blowing and suction integrated purification dust remover is arranged on the chute baffle of the scraper conveyer. An exhaust inlet of the purification dust remover is positioned at the lower part and close to the height of a roller of the coal mining machine, and an air outlet is positioned at the upper part and inclines towards the coal wall side, so that dust generated by coal cutting of the coal mining machine is purified and discharged by utilizing an entrainment effect; the purification dust remover is arranged in a hollow interlayer on one side, close to the coal mining machine, of the chute baffle, the purification dust remover is linear, and the interior of a shell of the purification dust remover comprises an air suction section, a dust removal section, an atomization section, a dehydration section and an air outlet section which are communicated in sequence; a plurality of air outlet channels are arranged on the outer side of the air outlet section in the circumferential direction so as to be communicated with the air outlet, and an air inlet channel is arranged at the bottom of the air suction section so as to be communicated with the air suction opening.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of coal mine dust control, and relates to a fixed-point start-stop control dust removal system and method based on a fully mechanized coal face chute baffle. BACKGROUND

[0002] The current respiratory dust concentration of a coal mine mining working face in China usually reaches 100-300 mg / m 3 , which is more than 80 times the relevant national standard, and workers are easily induced to have pneumoconiosis in a high-concentration dust environment for a long time. In addition, high-concentration dust is easy to cause coal dust explosion and participate in gas explosion, affect the visibility of the operation site, and induce related safety production accidents. Therefore, carrying out coal mine dust prevention and control is crucial for protecting the health of miners and ensuring the safety of mine production.

[0003] As the most seriously polluted place in the coal mine, the fully mechanized coal face is mainly polluted by dust generated by the coal cutter drum, hydraulic support column lowering and shifting, and spalling and collapse. Among them, the dust generated by the coal cutter drum accounts for about 75%. The main pollution reasons are as follows: the coal cutter drum continuously breaks the coal body to generate dust; the air flow in the air inlet lane encounters the coal cutter body at the working face, and due to the reduction of the cross-sectional area, the wind speed at the end face of the coal cutter body on the upwind side increases sharply, and the blocked air flow is partially diffused along the coal cutter body to the downwind side, and partially diffuses to the walking side by passing through the chute baffle. Due to the high wind speed, a large amount of dust generated by the upper drum cutting coal is carried, which pollutes the working environment of the walking side and increases the safety hazard of coal dust explosion.

[0004] Based on the above, there is an urgent need to design a new dust control method to solve the problem of dust pollution in the fully mechanized coal face. SUMMARY

[0005] Therefore, the purpose of the present application is to provide a fixed-point start-stop control dust removal system and method based on a fully mechanized coal face chute baffle to solve the problem of serious dust pollution in the fully mechanized coal face, pollute the working environment of the walking side, and increase the safety hazard of coal dust explosion.

[0006] To achieve the above purpose, the present application provides the following technical scheme: A dust control system based on a fully mechanized coal face chute baffle, comprising a hydraulic support and a scraper conveyor arranged on one side of the hydraulic support, a plurality of purification dust collectors are arranged on the chute baffle of the scraper conveyor along the length direction, and each purification dust collector is independently controlled to start and stop; The air inlet of the purification dust collector is located at the lower part and close to the height of the coal cutter drum, and the air outlet is located at the upper part and inclined towards the coal wall side, so as to utilize the entrainment effect to purify the dust generated by the coal cutter drum and discharge clean air flow, and form a directional positive pressure air curtain; The chute baffle is equipped with multiple sub-controllers corresponding to the dust collectors, and the hydraulic support is equipped with multiple dust concentration sensors corresponding to the dust collectors. The hydraulic support is equipped with a main controller that is electrically connected to the sub-controllers and dust concentration sensors to realize the fixed-point start and stop of the multiple dust collectors.

[0007] Furthermore, a water mist nozzle is arranged at the air outlet to form a directional positive pressure water mist air curtain in conjunction with the clean airflow.

[0008] Furthermore, the water mist nozzle is connected to a water pipe, and its water pressure is controlled to not exceed 1 MPa, so as to form a flexible water mist at the air outlet, so that the clean airflow can drive it to flow and form a directional positive pressure water mist air curtain.

[0009] Furthermore, the purification and dust removal device is arranged in the hollow interlayer of the chute baffle near the coal mining machine. The purification and dust removal device is in the shape of a straight line, and its shell includes a suction section, a dust removal section, an atomization section, a dehydration section and an air outlet section connected in sequence.

[0010] Furthermore, multiple air outlet channels are provided on the outer circumferential side of the air outlet section to connect to the air outlet, and an air inlet channel is provided at the bottom of the air intake section to connect to the air intake.

[0011] Furthermore, a centrifugal fan is provided between the dehydration section and the air outlet section. The centrifugal fan is driven by a power unit to generate negative pressure in the purification dust collector.

[0012] Furthermore, the dust removal section is equipped with a cyclone dust collector driven by a power unit, which uses centrifugal force to throw dust particles in the dust-laden gas toward the cylinder wall and form a rotating airflow.

[0013] Furthermore, the power unit is a hydraulic motor or an electro-hydraulic motor, driven by high-pressure emulsion from the fully mechanized mining face or by electricity.

[0014] Furthermore, the power unit is arranged at the end of the purification dust collector near the air outlet section to synchronously drive the centrifugal fan and the cyclone dust collector.

[0015] Furthermore, the atomizing section is equipped with a nozzle, which is connected to a water pipe to perform high-pressure spray washing on the inhaled dust-laden gas.

[0016] Furthermore, a dehydration device is provided in the dehydration section, which is a dehydration plate, a wire mesh dehydrator, or a cyclone dehydrator.

[0017] Furthermore, a sludge collection tank is provided at the bottom of the dehydration section or dust removal section to collect the liquid separated by the dehydration device.

[0018] Furthermore, the air outlet is equipped with adjustable guide vanes. By adjusting the vane angle, the angle between the air outlet direction and the coal wall can be adjusted within the range of 15° to 45°, ensuring that a positive pressure directional air curtain close to the coal wall can be formed under different coal seam dip angles and mining heights.

[0019] Furthermore, the air intake is provided with a flared structure to increase the effective collection area of ​​the air intake.

[0020] Furthermore, a flow guide is added to the flared structure to improve the collection efficiency of the air intake.

[0021] Furthermore, one of the dust collectors is arranged at 2m intervals.

[0022] On the other hand, the present invention also provides a fixed-point start-stop dust control method based on the baffle of the fully mechanized mining face chute, which adopts the dust control system based on the fully mechanized mining face chute baffle and specifically includes the following steps; The main controller controls the sub-controller, and the sub-controller then controls the independent start and stop of the corresponding dust collector, thereby realizing the fixed-point start and stop of multiple dust collectors in the fully mechanized mining face to meet the dust conditions at different locations in the fully mechanized mining face. When a dust concentration sensor detects that the dust concentration exceeds the set value, it transmits a signal to the main controller. The main controller then controls the corresponding dust collector to be turned on through the sub-controller to achieve fixed-point dust removal.

[0023] Furthermore, the air outlet is equipped with adjustable guide vanes; The adjustable guide vane angle of each dust collector outlet can be independently adjusted by the sub-controller, so that the angle between the outlet direction and the coal wall is adjustable within the range of 15° to 45°, ensuring that a positive pressure directional air curtain close to the coal wall can be formed under different coal seam dip angles and mining heights.

[0024] The beneficial effects of this invention are as follows: This invention integrates negative pressure dust collection and positive pressure air curtain into a purification dust collector on the baffle plate of the fully mechanized mining face chute, achieving precise and directional collection and isolation of dust generated by coal cutting by the coal mining machine. The air inlet is close to the dust generation point, and the powerful negative pressure suction effect directly draws the large amount of dust generated by the upper roller into the equipment. After multi-stage purification through cyclone centrifugation, high-pressure spray washing, and cyclone dehydration, a clean high-speed airflow is formed, effectively avoiding the fundamental path of dust diffusion to the pedestrian side. The comprehensive dust removal efficiency reaches over 97%, which is significantly better than traditional spray and dust removal fan methods. Furthermore, this invention, through a main controller and multiple independent sub-controllers, can realize the start and stop of the dust collector at a designated location, thereby supporting precise start and stop according to the location of the coal mining machine and remote adjustment of the air curtain angle, achieving both high-efficiency dust removal and energy-saving operation. Secondly, this invention uses multiple dust concentration sensors on the hydraulic support, each corresponding to a dust collector. When a dust concentration sensor detects that the dust concentration exceeds a set value, it transmits a signal to the main controller. The main controller then controls the corresponding dust collector to start through the sub-controllers, achieving targeted dust removal and promptly addressing dust generated by special circumstances such as hydraulic support column lowering and shifting, and wall collapse.

[0025] The purified clean airflow is ejected at high speed from the upper air outlet towards the coal wall, forming a directional positive pressure air curtain that adheres to the coal wall, completely isolating the coal mining machine from the personnel side. This not only prevents residual dust from drifting to the personnel side, but also guides the dust to settle secondary to the coal wall side, completely cutting off the dust leakage channel from the windward side of the coal mining machine to the personnel side. This fundamentally solves the dust pollution problem that has long plagued the fully mechanized mining face, and at the same time significantly reduces the safety hazard of coal dust explosion.

[0026] This invention fully utilizes existing high-pressure emulsion drive, requiring no additional power supply; the equipment is embedded in the hollow interlayer of the chute baffle, without occupying walking space; it supports precise start-up and shutdown based on the location of the coal mining machine and dust concentration, taking into account both efficient dust removal and energy-saving operation; it has a compact structure, is easy to maintain, and has high reliability, and is suitable for various mining heights and coal seam dip angles, with strong field adaptability and promotional value.

[0027] Other advantages, objectives, and features of the invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination, or may be learned from practice of the invention. The objectives and other advantages of the invention can be realized and obtained through the following description. Attached Figure Description

[0028] To make the objectives, technical solutions, and advantages of the present invention clearer, the preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, wherein: Figure 1 This is a schematic diagram of a fixed-point start-stop dust removal system based on a fully mechanized mining face chute baffle in one embodiment. Figure 2 This is a schematic diagram of the arrangement of the purification and dust removal device in the embodiment; Figure 3 This is a front view of the dust collector. Figure 4 Axonometric drawing of a dust collector; Figure 5This is a schematic diagram of the internal components of a dust collector.

[0029] Figure reference numerals: 1. Chute baffle, 2. Air inlet, 3. Air outlet, 4. Atomizing section, 5. Nozzle, 6. Dust removal section, 7. Dehydration section, 8. Power unit, 9. Hydraulic support, 10. Air inlet, 11. Cyclone dust collector, 12. Dehydration device, 13. Air outlet, 14. Centrifugal fan, 15. Water mist nozzle, 16. Sub-controller, 17. Main controller, 18. Purification dust collector, 19. Dust concentration sensor. Detailed Implementation

[0030] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0031] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual pictures. They should not be construed as limiting the invention. To better illustrate the embodiments of the invention, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual product dimensions. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0032] In the accompanying drawings of the embodiments of the present invention, the same or similar reference numerals correspond to the same or similar components. In the description of the present invention, it should be understood that if terms such as "upper," "lower," "left," "right," "front," and "rear" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting the present invention. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0033] Example 1 Please see Figures 1 to 5 This embodiment provides a dust control system and method based on the chute baffle of a fully mechanized mining face, which is applicable to conventional fully mechanized mining faces with a mining height of 2.5 to 4.5 m and a coal seam dip angle of ≤25°.

[0034] The system in this embodiment mainly includes a hydraulic support 9, a scraper conveyor arranged parallel to the hydraulic support 9, and multiple dust collectors 18 spaced apart along the length of the scraper conveyor chute baffle 1 (one dust collector is arranged every 2m). Each dust collector 18 is elongated and straight, embedded in the hollow interlayer of the chute baffle 1 near the coal mining machine, without occupying walkway space. Each dust collector 18 is controlled by an independent sub-controller 16. All sub-controllers 16 are electrically connected to a main controller 17 mounted on the hydraulic support 9. The main controller 17 controls the dust collectors 18 within a 10-20m range in front of the coal mining machine to open, and the others to close, based on the real-time position signal of the coal mining machine, achieving precise zoned operation.

[0035] Multiple dust concentration sensors 19, each corresponding to a dust collector 18, are installed on the hydraulic support 9. When a dust concentration sensor 19 detects that the dust concentration exceeds a set value, it transmits a signal to the main controller 17. The main controller 17 then controls the dust collector 18 corresponding to the dust concentration sensor 19 to be turned on through the sub-controller 16, thereby achieving fixed-point dust removal. Specifically, the dust concentration sensor 19 is installed on the column of the hydraulic support 9.

[0036] The interior of the dust collector 18 is provided with a suction section 10, a dust removal section 6, an atomization section 4, a dehydration section 7, and an air outlet section 13 arranged sequentially from bottom to top.

[0037] The bottom of the suction section 10 is provided with a horn-shaped flared suction port 2. The suction port 2 is located at the lower part of the chute baffle 1, close to the height of the upper drum of the coal mining machine, and a guide hood is installed outside the horn-shaped mouth to expand the effective collection area and directly suck most of the dust generated by the upper drum of the coal mining machine into the interior of the purification dust collector 18.

[0038] The dust removal section 6 is equipped with a cyclone dust collector 11 driven by a power unit 8. The dust-laden airflow rotates at high speed in the cyclone dust collector 11, and the dust particles are thrown towards the cylinder wall by centrifugal force and slide down the wall surface, thus achieving primary coarse dust removal.

[0039] Multiple rows of high-pressure nozzles 5 are arranged in the atomization section 4. The nozzles 5 are connected to the high-pressure water source of the working face through water pipes. The water pressure is controlled within 1MPa to spray and wash the rising dust-laden airflow, so that the fine dust is captured by the water mist and forms mud droplets.

[0040] The dewatering section 7 is equipped with a dewatering device 12 consisting of a baffle-type dewatering plate and a wire mesh demister. The airflow makes multiple sharp turns and passes through the wire mesh, achieving efficient air-water separation. A sludge collection tank is provided at the bottom of the dewatering section 7, and the accumulated sludge is periodically discharged through a drain valve.

[0041] A centrifugal fan 14 is provided between the dehydration section 7 and the air outlet section 13. The centrifugal fan 14 is coaxially connected to the cyclone dust collector 11 and is synchronously driven by the same power unit 8. In this embodiment, the power unit 8 is preferably a hydraulic motor, which uses the existing high-pressure emulsion (generally 31.5 MPa) on the working surface as a power source, without the need for additional power supply.

[0042] The air outlet section 13 has multiple air outlet channels evenly spaced around its circumference, connecting to the upper air outlet 3. The air outlet 3 is equipped with adjustable guide vanes, the angle of which can be adjusted manually within a range of 15° to 45°. This allows clean, high-speed airflow to be sprayed obliquely towards the coal face, forming a directional positive pressure air curtain that adheres tightly to the coal face, completely isolating the coal mining machine from the walkway. Simultaneously, the air outlet 3 is also equipped with water mist nozzles 15, which, in conjunction with the clean airflow, form a flexible positive pressure water mist air curtain, further enhancing the dust-blocking effect.

[0043] During operation, when the coal mining machine cuts coal through a certain section of the chute baffle 1, the corresponding dust collector 18 is automatically started by the sub-controller 16 under the command of the main controller 17. The suction port 2 generates a strong negative pressure, directly sucking in more than 90% of the dust generated near the upper drum. After three-stage purification of cyclone centrifugation + high-pressure spray washing + high-efficiency dehydration, it is sprayed out at high speed from the air outlet 3 at an angle towards the coal wall, forming a positive pressure air curtain against the wall. This not only prevents the residual dust from spreading to the pedestrian side, but also guides the dust to settle to the coal wall side, effectively controlling the concentration of respirable dust on the pedestrian side.

[0044] Example 2 Based on Example 1, this embodiment is adapted and optimized for fully mechanized mining faces with a mining height of 5.0 to 7.0 m and steeply inclined coal seams with a dip angle of 30° to 45°. The remaining structure is the same as or modified accordingly from Example 1.

[0045] In this embodiment, the dust collector 18 is still embedded in the hollow interlayer of the chute baffle 1, but in order to adapt to a larger air volume and higher moisture content, the dehydration device 12 adopts a combination of a cyclone dehydrator and a wire mesh demister in series to improve the dehydration efficiency.

[0046] The power unit 8 uses an explosion-proof electro-hydraulic motor, which is powered by a 1140V or 660V power supply system for the working face. It is suitable for special working faces where it is inconvenient to connect a high-pressure emulsion pump station.

[0047] The adjustable guide vanes of the air outlet 3 are driven by an electric push rod. The sub-controller 16 can independently and remotely adjust the vane angle of each purification dust collector 18, while maintaining an adjustable range of 15° to 45°. Under the condition of steeply inclined coal seams, the air outlet angle can be adjusted to close to 45°, so that the positive pressure air curtain adheres more tightly to the inclined coal wall, avoiding the air curtain from rising or tearing.

[0048] The remaining structures, including the air intake 2, dust removal section 6, atomization section 4, air outlet section 13, water mist nozzle 15, sub-controller 16, and main controller 17, are the same as in Example 1.

[0049] When this embodiment was actually applied to a steeply inclined working face with a large mining height of 7.0m in a certain mine, the system operated continuously and stably for 6 months, and the concentration of respirable dust throughout the walkway remained below 8mg / m³. 3 The positive pressure air curtain is stable and there is no air curtain breakage or dust leakage. The comprehensive dust removal efficiency is over 97%, which fully meets the dust prevention requirements under complex conditions of high mining height and steep inclination, and does not interfere with normal coal mining process. It significantly improves the working environment and effectively reduces the risk of coal dust explosion.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A fixed-point start-stop controlled dust removal system based on a fully mechanized mining face chute baffle, comprising a hydraulic support and a scraper conveyor arranged on one side of the hydraulic support, characterized in that, Multiple dust collectors are installed at intervals along the length of the chute baffle of the scraper conveyor, and each dust collector is independently controlled to start and stop. The air intake of the dust collector is located at the lower part, close to the height of the coal mining machine drum, and the air outlet is located at the upper part and tilted towards the coal wall side, so as to use the entrainment effect to purify the dust generated by the coal mining machine after cutting coal and discharge the clean airflow, forming a directional positive pressure air curtain. The chute baffle is equipped with multiple sub-controllers corresponding to the dust collectors, and the hydraulic support is equipped with multiple dust concentration sensors corresponding to the dust collectors. The hydraulic support is equipped with a main controller that is electrically connected to the sub-controllers and dust concentration sensors to realize the fixed-point start and stop of the multiple dust collectors.

2. The fixed-point start-stop controlled dust removal system based on the fully mechanized mining face chute baffle as described in claim 1, characterized in that, A water mist nozzle is arranged at the air outlet to form a directional positive pressure water mist air curtain in conjunction with the clean airflow.

3. The fixed-point start-stop dust removal system based on the fully mechanized mining face chute baffle as described in claim 2, characterized in that, The water mist nozzle is connected to a water pipe, and its water pressure is controlled to not exceed 1 MPa, so as to form a flexible water mist at the air outlet, so that the clean airflow can carry it to flow and form a directional positive pressure water mist air curtain.

4. The fixed-point start-stop dust removal system based on the fully mechanized mining face chute baffle as described in claim 1, characterized in that, The dust collector is arranged in the hollow interlayer of the chute baffle near the coal mining machine. The dust collector is in the shape of a straight line, and its shell includes a suction section, a dust removal section, an atomization section, a dehydration section and an air outlet section connected in sequence.

5. The fixed-point start-stop dust removal system based on the fully mechanized mining face chute baffle according to claim 4, characterized in that, Multiple air outlet channels are provided on the outer circumference of the air outlet section to connect to the air outlet, and an air inlet channel is provided at the bottom of the air intake section to connect to the air intake.

6. The fixed-point start-stop dust removal system based on the fully mechanized mining face chute baffle according to claim 4, characterized in that, A centrifugal fan is provided between the dehydration section and the air outlet section. The centrifugal fan is driven by a power unit to generate negative pressure in the purification dust collector.

7. The fixed-point start-stop controlled dust removal system based on the baffle of the fully mechanized mining face chute as described in claim 4, characterized in that, The dust removal section is equipped with a cyclone dust collector driven by a power unit, which uses centrifugal force to throw dust particles in the dust-laden gas toward the cylinder wall and form a rotating airflow.

8. The fixed-point start-stop controlled dust removal system based on the fully mechanized mining face chute baffle according to claim 7, characterized in that, The power unit is a hydraulic motor or an electro-hydraulic motor, driven by high-pressure emulsion from the fully mechanized mining face or by electricity.

9. The fixed-point start-stop controlled dust removal system based on the fully mechanized mining face chute baffle as described in claim 8, characterized in that, The power unit is located at the end of the purification dust collector near the air outlet section to synchronously drive the centrifugal fan and the cyclone dust collector.

10. The fixed-point start-stop controlled dust removal system based on the fully mechanized mining face chute baffle according to claim 4, characterized in that, The atomizing section is equipped with nozzles, which are connected to water pipes to perform high-pressure spray washing on the inhaled dust-laden gas.

11. The fixed-point start-stop dust removal system based on the fully mechanized mining face chute baffle according to claim 4, characterized in that, The dehydration section is equipped with a dehydration device, which may be a dehydration plate, a wire mesh dehydrator, or a cyclone dehydrator.

12. The fixed-point start-stop dust removal system based on the fully mechanized mining face chute baffle according to claim 11, characterized in that, A sludge collection tank is also provided at the bottom of the dehydration section or dust removal section to collect the liquid separated by the dehydration device.

13. The fixed-point start-stop dust removal system based on the fully mechanized mining face chute baffle according to claim 1, characterized in that, The air outlet is equipped with adjustable guide vanes. By adjusting the vane angle, the angle between the air outlet direction and the coal wall can be adjusted within the range of 15° to 45°, ensuring that a positive pressure directional air curtain close to the coal wall can be formed under different coal seam dip angles and mining heights.

14. The fixed-point start-stop dust removal system based on the fully mechanized mining face chute baffle according to claim 1, characterized in that, The air intake is provided with a flared structure to increase the effective collection area of ​​the air intake.

15. The fixed-point start-stop dust removal system based on the fully mechanized mining face chute baffle according to claim 14, characterized in that, A flow guide is added to the flared structure to improve the collection efficiency of the air intake.

16. The fixed-point start-stop controlled dust removal system based on the fully mechanized mining face chute baffle according to claim 14, characterized in that, The purification and dust removal devices are arranged at 2m intervals.

17. A method for fixed-point start-stop dust control based on a fully mechanized mining face chute baffle, characterized in that, The fixed-point start-stop dust removal system based on the fully mechanized mining face chute baffle as described in any one of claims 1 to 16 specifically includes the following steps; The main controller controls the sub-controller, and the sub-controller then controls the independent start and stop of the corresponding dust collector, thereby realizing the fixed-point start and stop of multiple dust collectors in the fully mechanized mining face to meet the dust conditions at different locations in the fully mechanized mining face. When a dust concentration sensor detects that the dust concentration exceeds the set value, it transmits a signal to the main controller. The main controller then controls the corresponding dust collector to be turned on through the sub-controller to achieve fixed-point dust removal.

18. The fixed-point start-stop dust control method based on the fully mechanized mining face chute baffle according to claim 17, characterized in that, The air outlet is equipped with adjustable guide vanes; The adjustable guide vane angle of each dust collector outlet can be independently adjusted by the sub-controller, so that the angle between the outlet direction and the coal wall is adjustable within the range of 15° to 45°, ensuring that a positive pressure directional air curtain close to the coal wall can be formed under different coal seam dip angles and mining heights.

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