An air curtain-water curtain triple barrier dust control device and method for underground mining operations

Abstract

The present invention discloses a triple-barrier dust control device and method for underground mining operations using an air curtain and a water curtain. The device relates to the field of mining technology and includes a coal mining machine, a hydraulic support, an air intake tunnel, a main pipeline, and an air conditioning network. An air-water nozzle and a plurality of ventilation pipelines are installed in the top area of the hydraulic support. One end of the ventilation pipeline is connected to the air-water nozzle. The air-water nozzle includes two nozzles, an air flow outlet and a mixed flow outlet. A nozzle and a support frame for fixing the nozzle are provided in the mixed flow outlet. The nozzle is connected to an external water pipe, and the ventilation pipelines are all connected to the main pipeline in the air intake tunnel. An air conditioning network is installed in the upwind area of the coal mining machine. The air conditioning network includes a reel, a motor for controlling the reel, and the air conditioning network body. The present invention combines spray dust reduction with a new type of air curtain dust control, forming an air curtain and a water curtain barrier in the area below the hydraulic support, achieving both spray dust reduction and barrier effects while preventing the sidewalk area from being exposed to large amounts of dust and droplets, reducing the humidity of the working environment, and optimizing the working environment.

Description

Technical Field

[0001] The present invention relates to the field of mining technology, in particular to a dust removal technology for a mining environment, and in particular to an air curtain-water curtain triple barrier dust control device and method for underground mining operations. Background Art

[0002] High dust concentrations not only pose a serious threat to the health of underground workers, easily causing pneumoconiosis, but also impact underground coal mining safety. High dust concentrations can trigger severe dust explosions, resulting in mass casualties and injuries. Therefore, dust has become one of the major hazards threatening underground coal mine safety.

[0003] Currently, coal mine dust control measures primarily fall into five categories: ventilation dust removal, spray dust suppression, coal seam water injection, chemical dust removal, and personal protection. Ventilation dust removal is currently one of the most economical and widespread dust control measures. This technology is categorized into two types: ventilation dust removal and ventilation dust control. Both technologies leverage the velocity and direction of airflow to control dust within the tunnels, achieving the goal of dust removal. However, ventilation dust removal often fails to effectively reduce dust concentrations, resulting in limited dust removal effectiveness. Ventilation dust control, on the other hand, can confine dust pollution to a specific area, reducing exposure to workers and gradually becoming a highly effective dust control technology. However, existing ventilation dust control technologies are immature and inefficient for fully mechanized mining faces in open spaces, making widespread use difficult. Spray dust suppression is also a common dust removal method. Its principle is to atomize water to settle dust, offering economical efficiency and a simple process. However, single-use spray dust suppression techniques struggle to achieve effective dust reduction results.

[0004] Therefore, it is urgent to study a dust control method to effectively control and settle the high concentration of dust generated by coal mining machines in fully mechanized mining faces. Summary of the Invention

[0005] In order to solve the above problems, the present invention discloses a triple-barrier dust control device and method for underground mining operations using an air curtain and a water curtain. The method is simple to operate and can greatly reduce the dust concentration on the sidewalk, especially at the coal mining machine driver and frame moving operations, thereby establishing a clean working area and maintaining a good working environment. The technology has the advantages of good economy, wide applicability and broad application prospects.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] The first aspect of the present invention proposes an air curtain-water curtain triple barrier dust control device for underground mining operations, comprising a coal mining machine, a hydraulic support, an air intake tunnel, a main pipeline and an air conditioning network, wherein:

[0008] An air-water nozzle and several ventilation pipes are installed in the top area of the hydraulic support. One end of the ventilation pipe is connected to the air-water nozzle. The air-water nozzle includes two injection ports, an air flow outlet and a mixed flow outlet. A nozzle and a support frame for fixing the nozzle are arranged in the mixed flow outlet. The nozzle is connected to an external water pipe, and the external water pipe is connected to the high-pressure water circuit of the comprehensive mining working face to provide high-pressure water for the nozzle. The water pressure range is 3.0~6.0MPa, and a water curtain is formed after being atomized by the nozzle. The water curtain collides, condenses and settles with the dust generated by the coal cutting machine to achieve the spray dust reduction effect; 30%~40% of the high-pressure gas of the total volume of the ventilation pipe enters the mixed flow outlet, and 60%~70% of the high-pressure gas of the total volume of the ventilation pipe enters the air flow outlet. The ventilation pipes are all connected to the main pipeline in the air inlet tunnel; an air regulating network is installed in the upwind area of the coal mining machine, and the air regulating network includes a reel, a motor for controlling the reel and the air regulating network body.

[0009] Optionally, a flow meter, a barometer, and an air pressure pump are installed on the main pipeline. The flow meter and the barometer are used to display the flow rate and pressure value of the gas in the main gas pipeline in real time, monitor and ensure whether the gas state in the pipeline is normal, and the air pressure pump is used to pressurize the air in the air inlet channel, playing the role of gas pressurization and pressure regulation.

[0010] Optionally, a cable trough is installed below the air-water nozzle.

[0011] Optionally, the ventilation line connects to an independent air switch along the hydraulic support's struts, then enters the air intake tunnel and connects to the main pipeline. The air supply range is 0.1-1.0 MPa. The air switch can be used to turn the air supply from the air-water nozzles on and off at any time, depending on the operating position of the shearer. Each hydraulic support is equipped with air-water nozzles, ventilation lines, and an air switch.

[0012] Optionally, the air-regulating net is located 3-5 meters upwind of the shearer, 300-600 mm from the unmined coal wall, and 400-800 mm from the roadway floor to prevent friction between the bottom of the air-regulating net and the roadway floor and unmined coal wall during movement. A motor-controlled reel is mounted on the top of the air-regulating net. When the shearer is operating, personnel in an area 3-5 meters upwind control the motor to lower the reel, regulating the incoming airflow. When not in operation, the reel can be retracted to avoid affecting airflow at the working face.

[0013] Optionally, the air-regulating net body has a mesh structure made of dense, small pores. The porous medium limits the velocity of the airflow passing through it, thereby inducing the incoming airflow to deflect toward the sidewalk area. A counterweight is provided beneath the air-regulating net body to ensure vertical expansion of the net body. When not in operation, the net body can be retracted by a motor-controlled reel. The air-regulating net can redirect the majority of airflow entering the shearer space, allowing more airflow to enter the sidewalk area and reducing the amount of incoming airflow that directly enters the shearer's cutting area. This reduces the amount of coal mining dust carried by the airflow into the sidewalk area, allowing more fresh airflow to enter the sidewalk area. Furthermore, the net can deflect some of the fresh airflow transported from the air intake tunnel toward the sidewalk, thereby enhancing the strength of the "pressure wall" and synergizing with the "air curtain-water curtain barrier" to control dust generated by the shearer within the negative pressure area near the shearer. This also makes it easier for the dust to collide with droplets from the spray mist field outside the shearer, increasing the probability of collision and achieving efficient dust reduction.

[0014] The nozzles in the air-water nozzles are fixed by a support frame to prevent deviation during the spray dust reduction operation and ensure the stability of the fog field spraying.

[0015] The mixed flow outlet is connected to the high-pressure gas of the ventilation pipeline, which accounts for 30-40% of the total volume of the ventilation pipeline. The high-pressure air is mixed with the water mist formed by the nozzle through the mixed flow outlet to form a strong water curtain, which enhances the dust reduction and dust blocking effect of the water curtain and prevents the high-concentration dust cut by the coal mining machine from entering the sidewalk area.

[0016] The majority of the high-pressure gas introduced from the ventilation line enters the air outlet, accounting for 60-70% of the total volume of the ventilation line. The high-pressure jet ejected from the outlet first reaches the working face floor, then, constrained by the working face floor and cable trough, migrates toward the sidewalk area, forming a vortex within the sidewalk space. The high-pressure gas ejected from the outlet effectively prevents dust from entering the sidewalk area and prevents large amounts of droplets from escaping into the manned work area, which could cause excessive humidity for drivers and rack movers at the coal face and impact their occupational health. It also forms an "air curtain-water curtain barrier." Furthermore, the high-pressure gas ejected from the outlet increases the static pressure energy in the sidewalk area, creating a static pressure differential between the sidewalk and the shearer area, shifting the airflow from high pressure to low pressure. This also prevents dust generated in the shearer area from entering the sidewalk area under the influence of the airflow, creating an invisible "pressure wall." Combined with the "air curtain-water curtain barrier," the dust-blocking effect is enhanced, forming a triple barrier that prevents high concentrations of dust generated by cutting from entering the manned sidewalk area.

[0017] During the shifting process, the hydraulic supports will move with the shearer's cutting position. To ensure that the "air curtain-water curtain barrier" always prevents dust generated by coal mining and cutting from entering the sidewalk area, the air circuit switch and the valve of the high-pressure water pipeline on the fully mechanized mining face must be closed and opened at any time according to the shearer's working position. While ensuring dust is blocked in the entire shearer cutting area, the air and water circuit switches of at least two hydraulic supports must be opened in the downwind area to further prolong the dust blocking effect. Coal mining face personnel always control the formation position of the "air curtain-water curtain barrier" by opening and closing the air circuit switch and the water circuit switch, realizing the dynamic movement of the air curtain-water curtain barrier.

[0018] The second aspect of the present invention provides a dust control method for the above device, comprising the following steps:

[0019] S1: Fresh air flows from the air intake roadway into the fully mechanized mining face roadway and is transported to the air regulating net on the upwind side of the shearer. The air regulating net limits the speed and volume of fresh air flowing into the coal cutting space and diverts it to the sidewalk area, making the static pressure energy in the sidewalk area higher than the static pressure energy in the coal cutting space. As a result, the fresh air flow in the downwind area of the shearer always flows from the sidewalk to the coal cutting space, and the dust-laden air flow is controlled within the shearer cutting area.

[0020] S2. Air-water nozzles installed on the top of the hydraulic support use high-pressure jets to form an air curtain, and spray to form a powerful water curtain. The powerful water curtain collides with, aggregates, and settles the accumulated dust near the shearer. The air curtain intercepts the dust generated by the shearer cutting and the droplets sprayed by the nozzles, forming an air curtain-water curtain barrier. The air curtain-water curtain barrier works in conjunction with the air conditioning network to enhance the dust blocking effect, preventing the high concentration of dust generated by cutting from entering the sidewalk area where people are working, thereby creating a clean sidewalk space.

[0021] S3. As the coal mining machine moves back and forth, the entire cutting process is always kept under the triple barrier effect of air curtain and water curtain. The dust-producing area of the coal mining machine keeps a low static pressure energy state, achieving a clean environment for the sidewalk and coal mining driver.

[0022] The beneficial effects of the present invention are:

[0023] 1. The present invention combines spray dust reduction with a new type of wind curtain dust control, forming an "air curtain-water curtain barrier" in the area below the hydraulic support. Compared with the traditional external spray technology of the coal mining machine, the spray can not only achieve the effect of spray dust reduction, but also play a barrier role, while preventing the sidewalk area, especially the coal mining machine drivers and the frame moving workers from being exposed to large amounts of dust and droplets. While reducing the dust concentration, it also reduces the humidity of the working environment, optimizes the working environment, and protects the occupational health of the workers.

[0024] 2. Compared with the traditional hydraulic support spray technology, the nozzle position arrangement of the present invention is reasonable. The number of nozzles installed on a single hydraulic support is reduced from 2 to 4 to 1, which greatly reduces water consumption and reduces the moisture content of the produced coal without affecting the sales of coal.

[0025] 3. The present invention adopts an air regulating net to change the direction of airflow, reduce the impact of airflow deviating toward the sidewalk caused by the coal cutting and dropping by the coal mining machine, and avoid a large amount of cutting dust being brought into the sidewalk area. At the same time, the triple barrier formed can control the cutting dust in the space from the hydraulic support to the coal wall, greatly increasing the contact and collision probability between the external spray on the coal mining machine and the cutting dust, and improving the dust reduction efficiency of the external spray. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A schematic diagram of the structure of an air curtain-water curtain triple barrier dust control device for underground mining operations and a schematic diagram of a dust control method of the present invention;

[0027] Figure 2 Schematic diagram of the structure of the air-water nozzle in the present invention;

[0028] Figure 3 Schematic diagram of the nozzle installation method of the present invention;

[0029] Figure 4 This is a top view of an air curtain-water curtain triple barrier dust control device for underground mining operations according to the present invention;

[0030] Figure 5 This is a schematic diagram of the installation position of the air regulating network of the present invention.

[0031] Among them, 1. Coal mining machine; 2. Hydraulic support; 3. Air-water nozzle; 301. Air flow outlet; 302. Mixed flow outlet; 303. Nozzle; 304. Support frame; 305. External water pipe; 4. Ventilation pipeline; 5. Air circuit switch; 6. Cable trough; 7. Air intake tunnel; 8. Main pipeline; 801. Flow meter; 802. Barometer; 803. Air pressure pump; 9. Air regulating network; 901. Air regulating network motor; 902. Reel; 10. Pedestrian area. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the invention for which protection is sought, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0033] Example 1

[0034] An air curtain-water curtain triple barrier dust control device for underground mining operations includes a coal mining machine 1, a hydraulic support 2, an air inlet tunnel 7, a main pipeline 8 and an air regulating network 9, wherein:

[0035] An air-water nozzle 3 and several ventilation pipes 4 are installed in the top area of the hydraulic support 2. One end of the ventilation pipe 4 is connected to the air-water nozzle 3. The air-water nozzle 3 includes two injection ports, an air flow outlet 301 and a mixed flow outlet 302. A nozzle 303 and a support frame 304 for fixing the nozzle 303 are arranged in the mixed flow outlet 302. The nozzle 303 is connected to an external water pipe 305. The external water pipe 305 is connected to the high-pressure waterway of the fully mechanized mining working face to provide high-pressure water for the nozzle 303. The water pressure range is 3.0-6.0 MPa. After atomization, a water curtain is formed, which collides with, condenses, and settles the dust generated by the cutting of the coal mining machine 1, achieving the effect of spray dust reduction; 30% to 40% of the total volume of high-pressure gas in the ventilation pipeline 4 enters the mixed flow outlet 302, and 60% to 70% of the total volume of high-pressure gas in the ventilation pipeline 4 enters the air flow outlet 301. The ventilation pipeline 4 is connected to the main pipeline 8 in the air inlet tunnel 7; an air regulating network 9 is installed in the upwind area of the coal mining machine 1, and the air regulating network 9 includes a reel 902, a motor 901 for controlling the reel 902, and the air regulating network body.

[0036] Optionally, a flow meter 801, a barometer 802, and an air pressure pump 803 are installed on the main pipeline 8. The flow meter 801 and the barometer 802 are used to display the flow and pressure values of the gas in the main gas pipeline in real time, monitor and ensure whether the gas state in the pipeline is normal, and the air pressure pump 803 is used to pressurize the air in the air inlet channel 7, playing the role of gas pressurization and pressure regulation.

[0037] Optionally, a cable trough 6 is installed below the air-water nozzle 3 .

[0038] Optionally, the ventilation line 4 connects to an independent air switch 5 along the support column of the hydraulic support 2, then enters the air intake tunnel 7 and connects to the main pipeline 8. The air supply range is 0.1-1.0 MPa. The air switch 5 can be used to open or close the air supply from the air-water nozzle 3 at any time, depending on the operating position of the coal mining machine 1. Each hydraulic support 2 is equipped with an air-water nozzle 3, ventilation line 4, and air switch 5.

[0039] Optionally, the air regulating net 9 is located 3-5 meters away from the upwind side of the shearer 1, 300-600 mm away from the unmined coal wall, and 400-800 mm away from the roadway floor, to prevent friction between the bottom of the air regulating net 9 and the roadway floor and unmined coal wall during movement. A reel 902 is mounted on the upper end of the air regulating net 9, which can be controlled by a motor 901. When the shearer 1 is operating, a person in the upwind area 3-5 meters away controls the motor 901 to lower the reel 902 to adjust the direction of the incoming airflow. When not in operation, the reel 902 can be retracted to avoid affecting the airflow at the working face.

[0040] Optionally, the air regulating net body has a mesh structure and is made of dense small pores. The porous medium is used to limit the flow rate of the wind flow, inducing the incoming wind flow to deviate toward the sidewalk area 10; a counterweight is provided under the air regulating net body to ensure the vertical stretch of the air regulating net body. When not in operation, the reel 902 can be retracted by controlling the motor 901. The air regulating network 9 can induce most of the airflow entering the space of the coal mining machine 1 to change its direction, so that more airflow enters the sidewalk area 10, reducing the amount of incoming airflow directly entering the cutting area of the coal mining machine 1, so as to reduce the airflow carrying coal mining and cutting dust into the sidewalk area 10, and allow more fresh airflow to enter the sidewalk area 10. At the same time, it induces part of the fresh airflow transported in by the air inlet channel 7 to deviate toward the sidewalk direction, thereby enhancing the strength of the "pressure wall" and cooperating with the "air curtain-water curtain barrier" to control the dust generated by the coal mining machine 1 within the negative pressure area near the coal mining machine 1, and at the same time make it easier for the dust to collide with the droplets of the spray mist field outside the coal mining machine 1, thereby increasing the collision probability and achieving the purpose of efficient dust reduction.

[0041] The nozzle 303 in the air-water nozzle 3 is fixed by a support frame 304 to prevent deviation during the spray dust reduction operation and ensure the stability of the mist field spraying.

[0042] The mixed flow outlet 302 is connected to the high-pressure gas of the ventilation pipe 4, which accounts for 30-40% of the total volume of the ventilation pipe 4. The high-pressure air is mixed with the water mist formed by the nozzle 303 through the mixed flow outlet 302 to form a strong water curtain, which enhances the dust reduction and dust blocking effect of the water curtain and prevents the high-concentration dust cut by the coal mining machine 1 from entering the sidewalk area 10.

[0043] The majority of the high-pressure gas introduced by ventilation duct 4 enters airflow outlet 301, accounting for 60-70% of the total volume of ventilation duct 4. The high-pressure jet ejected from airflow outlet 301 first reaches the working face floor, then, constrained by the working face floor and cable trough 6, migrates toward sidewalk area 10, forming a vortex within the sidewalk space. The high-pressure gas ejected from airflow outlet 301 effectively prevents dust from entering sidewalk area 10 and prevents large amounts of droplets from escaping into manned work areas, potentially causing excessive humidity in the environment for coal face drivers and frame movers, which could affect their occupational health. The high-pressure gas also forms an "air curtain and water curtain barrier." In addition, the high-pressure gas ejected from the airflow outlet 301 can increase the static pressure energy of the sidewalk area 10, forming a static pressure difference from the sidewalk area 10 to the coal mining machine area, and forming an airflow from high pressure to low pressure. It also prevents the dust generated in the coal mining machine area from entering the sidewalk area 10 under the action of the airflow, and establishes an invisible "pressure wall". Combined with the "air curtain-water curtain barrier", the dust blocking effect is enhanced to form a triple barrier to prevent the high concentration of dust generated by cutting from entering the sidewalk area 10 where people are working.

[0044] During the shifting process, the hydraulic supports 2 will move with the cutting position of the shearer 1. To ensure that the "air curtain-water curtain barrier" always prevents dust generated by the coal mining and cutting operations from entering the sidewalk area 10, the air circuit switch 5 and the valve of the high-pressure water pipeline on the fully mechanized mining face must be closed and opened at any time according to the working position of the shearer. While ensuring that the entire section of the shearer cutting area is dust-blocked, the air circuit and water circuit switches of at least two hydraulic supports 2 must be opened in the downwind area to further prolong the dust-blocking effect. Coal mining face personnel always control the formation position of the "air curtain-water curtain barrier" by opening and closing the air circuit switches and water circuit switches, realizing the dynamic movement of the air curtain-water curtain barrier.

[0045] The second aspect of the present invention provides a dust control method for the above device, comprising the following steps:

[0046] S1: Fresh air flows from the air inlet tunnel 7 into the fully mechanized mining face tunnel and is transported to the air regulating net 9 on the upwind side of the shearer 1. Due to the small ventilation hole area of the air regulating net 9, the speed and volume of the fresh air flowing into the coal cutting space are restricted, causing the fresh air flow to change its direction and turn to the sidewalk area 10. This makes the static pressure energy in the sidewalk area 10 higher than the static pressure energy in the coal cutting space. As a result, the fresh air flow in the downwind area of the shearer 1 always flows from the sidewalk to the coal cutting space, forming an invisible "pressure wall". The dust-laden air flow is controlled within the cutting area of the shearer 1.

[0047] S2. The air-water nozzle 3 installed on the top area of the hydraulic support 2 uses a high-pressure jet to form an air curtain, and a spray to form a powerful water curtain. The powerful water curtain collides with, aggregates, and settles the accumulated dust near the shearer. The air curtain intercepts the dust generated by the shearer 1 and the droplets sprayed by the nozzle 303, preventing large amounts of dust and droplets from entering the sidewalk area 10, forming an air curtain-water curtain barrier. The air curtain-water curtain barrier cooperates with the air conditioning network 9 to jointly enhance the dust blocking effect and the strength of the "pressure wall", forming a triple barrier effect, preventing the high concentration of dust generated by cutting from entering the sidewalk area 10 where people are working, thereby forming a clean sidewalk space.

[0048] S3. As the coal mining machine moves back and forth, and cooperates with the control of the air valve and nozzle switch to open and close, the entire cutting process is always kept under the triple barrier effect of the air curtain and water curtain. The dust-producing area of the coal mining machine 1 is kept in a low static pressure state, achieving a clean environment for the sidewalk and the coal mining driver.

[0049] The hydraulic support 2 air-water nozzles 3 form an air curtain and a water curtain. The powerful water curtain, formed by the high-speed airflow, can effectively purify the polluted airflow near the coal shearer and, in conjunction with the air curtain, prevent dust and droplets from entering the sidewalk area 10. The air curtain can effectively intercept the dust and sprayed droplets generated by the coal shearer 1 during cutting, preventing large amounts of dust and droplets from entering the sidewalk area 10. The air conditioning network 9 induces most of the airflow to deflect toward the sidewalk, forming a high-pressure area on the sidewalk, preventing dust in the low-pressure area of the coal shearer 1 from entering the sidewalk, thereby establishing an invisible "pressure wall". Combined with the "air curtain and water curtain barrier", the dust-blocking effect is strengthened, forming a triple barrier effect, preventing high-concentration dust generated by cutting from entering the sidewalk area 10 where people are working, thereby creating a clean sidewalk space. Furthermore, as the coal shearer 1 reciprocates and cuts, the air valve and nozzle switches can be opened and closed in coordination, maintaining the triple air curtain and water curtain barrier throughout the cutting process, thereby protecting the physical and mental health of the workers. The air curtain-water curtain triple barrier dust control method for underground mining operations provided by the present invention is simple to operate, can greatly reduce the dust concentration on the sidewalk, especially at the coal mining machine driver and frame moving work area, establish a clean working area, and maintain a good working environment. In addition, this technology has the advantages of good economy, wide applicability, and broad application prospects.

[0050] Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by technicians in this technical field within the essential scope of the present invention should also fall within the scope of protection of the present invention.

Claims

1. An air curtain-water curtain triple barrier dust control device for underground mining operations, characterized in that: It includes coal mining machine, hydraulic support, air inlet tunnel, main pipeline and air regulating network, among which, An air-water nozzle and several ventilation pipes are installed in the top area of the hydraulic support. One end of the ventilation pipe is connected to the air-water nozzle. The air-water nozzle includes two injection ports, an air flow outlet and a mixed flow outlet. A nozzle and a support frame for fixing the nozzle are provided in the mixed flow outlet. The nozzle is connected to an external water pipe. 30% to 40% of the high-pressure gas of the total volume of the ventilation pipe enters the mixed flow outlet, and 60% to 70% of the high-pressure gas of the total volume of the ventilation pipe enters the air flow outlet. The ventilation pipes are all connected to the main pipeline in the air intake tunnel; an air regulating network is installed in the upwind area of the coal mining machine. The air regulating network includes a reel, a motor for controlling the reel, and the air regulating network body; A flow meter, a barometer, and an air pressure pump are installed on the main pipeline. The flow meter and the barometer are used to display the flow rate and pressure of the gas in the main gas pipeline in real time, monitor and ensure whether the gas state in the pipeline is normal. The air pressure pump is used to pressurize the air in the air inlet tunnel, playing the role of gas pressurization and pressure regulation; The air regulating network is 3-5 m away from the upwind side of the coal mining machine, 300-600 mm away from the unmined coal wall, and 400-800 mm away from the roadway floor. The air regulating net body is in a mesh structure, and a counterweight is provided below the air regulating net body.

2. The air curtain-water curtain triple barrier dust control device for underground mining operations according to claim 1, characterized in that: A cable trough is installed below the air-water sprinkler head.

3. The air curtain-water curtain triple barrier dust control device for underground mining operations according to claim 1, characterized in that: The ventilation pipeline is connected to an independent air circuit switch along the support column of the hydraulic support.

4. The dust control method of the air curtain-water curtain triple barrier dust control device for underground mining operations according to any one of claims 1 to 3, characterized in that: The steps include: S1: Fresh air flows from the air intake roadway into the fully mechanized mining face roadway and is transported to the air regulating net on the upwind side of the shearer. The air regulating net limits the speed and volume of fresh air flowing into the coal cutting space and diverts it to the sidewalk area, making the static pressure energy in the sidewalk area higher than the static pressure energy in the coal cutting space. As a result, the fresh air flow in the downwind area of the shearer always flows from the sidewalk to the coal cutting space, and the dust-laden air flow is controlled within the shearer cutting area. S2. Air-water nozzles installed on the top of the hydraulic support use high-pressure jets to form an air curtain, and spray to form a powerful water curtain. The powerful water curtain collides with, aggregates, and settles the accumulated dust near the shearer. The air curtain intercepts the dust generated by the shearer cutting and the droplets sprayed by the nozzles, forming an air curtain-water curtain barrier. The air curtain-water curtain barrier works in conjunction with the air conditioning network to enhance the dust blocking effect, preventing the high concentration of dust generated by cutting from entering the sidewalk area where people are working, thereby creating a clean sidewalk space. S3. As the coal mining machine moves back and forth, the entire cutting process is always kept under the triple barrier effect of air curtain and water curtain. The dust-producing area of the coal mining machine keeps a low static pressure energy state, achieving a clean environment for the sidewalk and coal mining driver.

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