CN118622358A - An air curtain-water curtain triple barrier dust control device and method for underground mining operations - Google Patents

Abstract

The present invention discloses an air curtain-water curtain triple barrier dust control device and method for underground mining operation, which relates to the field of mining technology, including coal mining machine, hydraulic support, air intake tunnel, main pipeline and air regulating network, wherein, air-water nozzle and several ventilation pipelines are installed in the top area of hydraulic support, one end of ventilation pipeline is connected to air-water nozzle, air-water nozzle includes two injection ports of air flow outlet and mixed flow outlet, nozzle and support frame for fixing nozzle are arranged in mixed flow outlet, nozzle is connected to external water pipe, ventilation pipeline is connected to main pipeline in air intake tunnel; air regulating network is installed in upwind area of coal mining machine, air regulating network includes reel, motor for controlling reel and air regulating network body. The present invention combines spray dust reduction with new type of wind curtain dust control, forms air curtain-water curtain barrier in the area below hydraulic support, realizes spray dust reduction and barrier effect, and at the same time avoids contact of large amount of dust and droplets in pedestrian area, reduces humidity of working environment, and optimizes working environment.

Description

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

Technical Field

The 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

High-concentration dust not only seriously threatens the health of underground workers and easily causes pneumoconiosis, but also affects the underground safety production of coal mining enterprises. High-concentration dust can cause serious dust explosions, resulting in mass deaths and injuries. Therefore, dust has become one of the main hazards threatening underground safety production in coal mines.

At present, the dust prevention measures in coal mines mainly include five categories: ventilation dust removal, spray dust suppression, coal seam water injection dust prevention, chemical dust removal and personal protection. Among them, ventilation dust removal is one of the most economical and widely used dust control measures. This technology is divided into two categories, one is ventilation dust removal, and the other is ventilation dust removal. Both technologies use the flow speed and direction of the wind flow to jointly prevent and control the dust in the tunnel to achieve the purpose of dust removal, but the ventilation dust removal method is often difficult to effectively reduce the dust concentration, and the dust removal effect is not obvious; the ventilation dust removal method can control dust pollution within a certain area and reduce contact with operators, and gradually become an efficient dust prevention technology. However, for the fully mechanized mining working face in open space, the existing ventilation dust removal technology is not mature enough and has low efficiency, so it is difficult to promote its use. Spray dust suppression is also a common dust removal method. Its principle is to atomize water to settle dust. It has the characteristics of good economy and simple process, while the single spray dust suppression technology is difficult to achieve a good dust suppression effect.

Therefore, it is urgent to study a dust control method to effectively control and settle the high-concentration dust generated by coal mining machines in fully mechanized mining faces.

Summary of the invention

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

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

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 regulating network, wherein:

An air-water nozzle and several 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 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. 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. After being atomized by the nozzle, a water curtain is formed. The water curtain collides, condenses and settles with the dust generated by the cutting of the coal mining machine to achieve the spray dust reduction effect; 30%-40% of the high-pressure gas of the total volume of the ventilation pipeline enters the mixed flow outlet, and 60%-70% of the high-pressure gas of the total volume of the ventilation pipeline enters the air flow outlet. The ventilation pipelines are all connected to the main pipeline in the air intake tunnel; an air regulating net is installed in the upwind area of the coal mining machine, and the air regulating net includes a reel, a motor for controlling the reel and the air regulating net body.

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 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 a role in gas pressurization and pressure regulation.

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

Optionally, the ventilation pipeline is connected to an independent gas circuit switch along the support of the hydraulic support, and then enters the air inlet tunnel and is connected to the main pipeline, with a gas supply range of 0.1-1.0MPa. According to the operating position of the coal mining machine, the gas introduced by the air-water nozzle can be turned on or off at any time through the gas circuit switch. Each hydraulic support is equipped with an air-water nozzle, a ventilation pipeline and a gas circuit switch.

Optionally, the air regulating net is 3 to 5 meters away from the upwind side of the coal mining machine, 300 to 600 mm away from the unmined coal wall, and 400 to 800 mm away from the tunnel floor, so as to avoid friction between the bottom of the air regulating net and the tunnel floor and the unmined coal wall during movement. A reel is installed at the upper end of the air regulating net, which can be controlled by a motor. When the coal mining machine is working, the personnel control the motor to lower the reel in the area 3 to 5 meters away from the upwind side to adjust the direction of the incoming wind flow. It can be retracted by the reel when not working, without affecting the flow of wind on the working face.

Optionally, the air regulating net body is a mesh structure, made of dense small holes, and uses porous media to limit the flow rate of the wind flow, inducing the incoming wind flow to deviate to the sidewalk area; a counterweight is provided under the air regulating net body to ensure the vertical extension of the air regulating net body, and the reel can be retracted by a motor in a non-working state. The air regulating net can induce most of the wind flow entering the coal mining machine space to change direction, so that more wind flow enters the sidewalk area, and a large amount of incoming wind flow directly enters the coal mining machine cutting area, so as to reduce the wind flow carrying coal mining and cutting dust into the sidewalk area, so that more fresh wind flow enters the sidewalk area, and at the same time, it induces part of the fresh wind flow transported by the air intake channel to deviate to the sidewalk direction, enhance the strength of the "pressure wall", and work together with the "air curtain-water curtain barrier" to control the dust generated by the coal mining machine in the negative pressure area near the coal mining machine, 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, increase the collision probability, and achieve the purpose of efficient dust reduction.

The nozzle in the air-water nozzle is fixed by a support frame to prevent deviation during the spray dust reduction operation and ensure the stability of the fog field spray.

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 mixes 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.

Most of the high-pressure gas connected by the ventilation pipeline enters the airflow outlet, which accounts for 60-70% of the total volume of the ventilation pipeline. The high-pressure jet ejected from the airflow outlet first reaches the working face bottom plate, and then moves to the sidewalk area under the constraints of the working face bottom plate and the cable trough, and forms a vortex in the sidewalk space. The high-pressure gas ejected from the airflow outlet can effectively further prevent dust from entering the sidewalk area, and can also prevent a large number of droplets from escaping to the manned operation area, causing excessive humidity in the environment where the coal mining face driver and the frame moving work are located, affecting the occupational health of the workers, and at the same time forming an "air curtain-water curtain barrier". In addition, the high-pressure gas ejected from the airflow outlet can increase the static pressure energy of the sidewalk area, forming a static pressure difference from the sidewalk area to the coal mining machine area, forming an airflow from high pressure to low pressure, and also preventing the dust generated in the coal mining machine area from entering the sidewalk area under the action of the airflow, establishing an invisible "pressure wall", and combining with the "air curtain-water curtain barrier" to jointly enhance the dust blocking effect, forming a triple barrier, and preventing the high-concentration dust generated by cutting from entering the sidewalk area where people are working.

During the moving process, the hydraulic support will move with the cutting position of the coal mining machine. In order to make the "air curtain-water curtain barrier" always block the dust generated by coal mining and cutting work from entering the pedestrian area, the gas circuit switch and the valve of the high-pressure water pipeline of the fully mechanized mining face need to be closed and opened at any time with the working position of the coal mining machine. While ensuring that the entire section of the coal mining machine cutting area is blocked from dust, the gas circuit and water circuit switches of at least two hydraulic supports need to be opened in the downwind area to further extend the dust blocking effect. The personnel of the coal mining working face always control the formation position of the "air curtain-water curtain barrier" by opening and closing the gas circuit switch and the water circuit switch to realize the dynamic movement of the air curtain-water curtain barrier work.

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

S1. Fresh air flows into the fully mechanized mining face from the air inlet tunnel and moves to the air regulating net on the upwind side of the coal mining machine. The air regulating net limits the wind speed and air volume of fresh air flowing to the coal mining cutting space and turns to the sidewalk area, so that the static pressure energy in the sidewalk area is higher than the static pressure energy in the coal mining cutting space, resulting in the fresh air flow in the downwind area of the coal mining machine always flowing from the sidewalk to the coal mining cutting space, and the dust-laden air flow is controlled within the coal mining machine cutting area;

S2. The air-water nozzle installed on the top area of the hydraulic support uses high-pressure jets to form an air curtain, and uses spray to form a strong water curtain. The strong water curtain collides, aggregates, and settles with the accumulated dust near the coal mining machine. The air curtain intercepts the dust generated by the coal mining machine and the droplets sprayed by the nozzle, forming an air curtain-water curtain barrier; the air curtain-water curtain barrier cooperates with the air regulating network to jointly enhance the dust blocking effect, prevent the high-concentration dust generated by cutting from entering the sidewalk area where people are working, and thus form 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 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 drivers.

The beneficial effects of the present invention are:

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 contacting a large amount of dust and droplets, reducing the dust concentration while reducing the humidity of the working environment, optimizing the working environment, and protecting the occupational health of the workers.

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

3. The present invention adopts an air regulating net to change the direction of airflow, reduces the impact of airflow deviating toward the sidewalk caused by the coal cutting and falling by the coal mining machine, and avoids a large amount of cutting dust being brought into the sidewalk area. At the same time, the formed triple barrier can control the cutting dust in the space from the hydraulic support to the coal wall, greatly increases the contact and collision probability between the external spray on the coal mining machine and the cutting dust, and improves the dust reduction efficiency of the external spray.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is 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 according to the present invention;

FIG2 is a schematic diagram of the structure of the air-water nozzle in the present invention;

FIG3 is a schematic diagram of a nozzle installation method in the present invention;

FIG4 is a top view of an air curtain-water curtain triple barrier dust control device for underground mining operations according to the present invention;

FIG. 5 is a schematic diagram of the installation position of the air regulating network of the present invention.

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 inlet 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

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 belong to 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 claimed for protection, but merely represents the 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 belong to the scope of protection of the present invention.

Example 1

An air curtain-water curtain triple barrier dust control device for underground mining operation comprises 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:

The top area of the hydraulic support 2 is equipped with an air-water nozzle 3 and a plurality of ventilation pipes 4. 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. 3 forms a water curtain after atomization, and the water curtain collides, condenses and settles with the dust generated by the cutting of the coal mining machine 1, so as to achieve the effect of spray dust reduction; 30% to 40% of the total volume of the high-pressure gas of the ventilation pipeline 4 enters the mixed flow outlet 302, and 60% to 70% of the total volume of the ventilation pipeline 4 enters the air flow outlet 301, and the ventilation pipeline 4 is connected to the main pipeline 8 in the air inlet tunnel 7; the air regulating net 9 is installed in the upwind area of the coal mining machine 1, and the air regulating net 9 includes a reel 902, a motor 901 for controlling the reel 902 and an air regulating net body.

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 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 803 is used to pressurize the air in the air inlet channel 7, thereby playing a role in gas pressurization and pressure regulation.

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

Optionally, the ventilation pipeline 4 is connected to an independent gas circuit switch 5 along the support of the hydraulic support 2, and then enters the air inlet tunnel 7 and is connected to the main pipeline 8, with a gas supply range of 0.1 to 1.0 MPa. According to the operating position of the coal mining machine 1, the gas introduced by the air-water nozzle 3 can be turned on or off at any time through the gas circuit switch 5. Each hydraulic support 2 is equipped with an air-water nozzle 3, a ventilation pipeline 4 and a gas circuit switch 5.

Optionally, the air regulating net 9 is 3 to 5 meters away from the upwind side of the coal mining machine 1, 300 to 600 mm away from the unmined coal wall, and 400 to 800 mm away from the tunnel floor, so as to avoid friction between the bottom of the air regulating net 9 and the tunnel floor and the unmined coal wall during movement. A reel 902 is installed at the upper end of the air regulating net 9, which can be controlled by a motor 901. When the coal mining machine 1 is working, a person controls the motor 901 to lower the reel 902 in the upwind area 3 to 5 meters away to adjust the direction of the incoming wind flow. When it is not working, it can be retracted by the reel 902 without affecting the flow of wind on the working face.

Optionally, the air regulating net body is in a mesh structure and is made of dense small holes. The porous medium is used to limit the flow rate of the wind flow, thereby 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 extension 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 wind flow entering the space of the coal mining machine 1 to change its direction, so that more wind flow enters the sidewalk area 10, and a large amount of incoming wind flow is reduced to directly enter the cutting area of the coal mining machine 1, so as to reduce the wind flow carrying coal mining and cutting dust into the sidewalk area 10, so that more fresh wind flow enters the sidewalk area 10, and at the same time induces part of the fresh wind flow transported by the air inlet channel 7 to deviate in the direction of the sidewalk, 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.

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.

The mixed flow outlet 302 is connected to the high-pressure gas of the ventilation pipeline 4, which accounts for 30-40% of the total volume of the ventilation pipeline 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.

Most of the high-pressure gas connected by the ventilation pipeline 4 enters the airflow outlet 301, which accounts for 60-70% of the total volume of the ventilation pipeline 4. The high-pressure jet ejected from the airflow outlet 301 first reaches the working face bottom plate, and then moves to the pedestrian area 10 under the constraints of the working face bottom plate and the cable trough 6, and forms a vortex in the pedestrian space. The high-pressure gas ejected from the airflow outlet 301 can effectively further prevent dust from entering the pedestrian area 10, and can also prevent a large number of droplets from escaping to the manned working area, causing excessive humidity in the environment where the coal mining face driver and the frame moving work are working, affecting the occupational health of the workers, and at the same time forming an "air curtain-water curtain barrier". In addition, the high-pressure gas ejected from the airflow outlet 301 can increase the static pressure energy of the pedestrian area 10, forming a static pressure difference from the pedestrian area 10 to the coal mining machine area, forming an airflow from high pressure to low pressure, and also preventing the dust generated in the coal mining machine area from entering the pedestrian area 10 under the action of the airflow, thereby establishing an invisible "pressure wall" and combining with the "air curtain-water curtain barrier" to jointly enhance the dust blocking effect, forming a triple barrier to prevent the high-concentration dust generated by cutting from entering the pedestrian area 10 where people are working.

During the moving process, the hydraulic support 2 will move with the cutting position of the coal mining machine 1. In order to make the "air curtain-water curtain barrier" always block the dust generated by the coal mining and cutting work from entering the pedestrian area 10, the gas circuit switch 5 and the valve of the high-pressure water pipeline of the fully mechanized mining face need to be closed and opened at any time with the working position of the coal mining machine. While ensuring that the entire section of the coal mining machine cutting area is blocked from dust, the gas circuit and water circuit switches of at least two hydraulic supports 2 need to be opened in the downwind area to further extend the dust blocking effect. The personnel of the coal mining working face always control the formation position of the "air curtain-water curtain barrier" by opening and closing the gas circuit switch and the water circuit switch to realize the dynamic movement of the air curtain-water curtain barrier work.

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

S1, fresh airflow enters the fully mechanized mining face tunnel from the air inlet tunnel 7, and moves to the air regulating net 9 on the upwind side of the coal mining machine 1. Since the ventilation hole area of the air regulating net 9 is small, the wind speed and air volume of the fresh airflow to the coal mining cutting space are limited, so that the fresh airflow changes its moving direction and turns to the sidewalk area 10, so that the static pressure energy at the sidewalk area 10 is higher than the static pressure energy of the coal mining cutting space, resulting in the fresh airflow in the downwind area of the coal mining machine 1 always flowing from the sidewalk to the coal mining cutting space, forming an invisible "pressure wall", and the dust-laden airflow is controlled within the cutting area of the coal mining machine 1;

S2, through the air-water nozzle 3 installed in the top area of the hydraulic support 2, the air curtain is formed by high-pressure jet, and the strong water curtain is formed by spray. The strong water curtain collides, aggregates, and settles with the accumulated dust near the coal mining machine. The air curtain intercepts the dust generated by the coal mining machine 1 and the droplets sprayed by the nozzle 303, preventing a large amount 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 regulating net 9 to jointly strengthen the dust blocking effect, enhance the strength of the "pressure wall", and form a triple barrier effect, preventing the high-concentration dust generated by cutting from entering the sidewalk area 10 where people are working, thereby forming a clean sidewalk space;

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 of air curtain and water curtain. The dust-producing area of the coal mining machine 1 keeps a low static pressure energy state, achieving a clean environment for the sidewalk and coal mining drivers.

The air curtain and water curtain are formed by the air-water nozzle 3 of the hydraulic support 2. The strong water curtain formed under the action of the high-speed airflow can effectively purify the polluted airflow near the coal mining machine, and jointly block the dust and droplets from entering the sidewalk area 10 with the air curtain; the air curtain can effectively intercept the dust and sprayed droplets generated by the cutting of the coal mining machine 1, and prevent a large amount of dust and droplets from entering the sidewalk area 10; the wind regulating net 9 induces most of the wind flow to deviate in the direction of the sidewalk, which can form a high-pressure area of the sidewalk, and prevent the dust in the low-pressure area of the coal mining machine 1 from entering the sidewalk, thereby establishing an invisible "pressure wall", and combined with the "air curtain-water curtain barrier" to jointly strengthen the dust blocking effect, form a triple barrier effect, and prevent the high-concentration dust generated by cutting from entering the sidewalk area 10 where people are working, thereby forming a clean sidewalk space; and as the coal mining machine 1 cuts and moves back and forth, it can cooperate with the air valve and nozzle switch to open and close, so that the entire cutting process is always under the triple barrier effect of the air curtain-water curtain, ensuring the physical and mental health of the operators. 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 operations, establish a clean working area, and maintain a good working environment. The technology has the advantages of good economy, wide application range, and broad application prospects.

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 protection scope of the present invention.

Claims (7)

1. An air curtain-water curtain triple barrier dust control device for underground mining operation, characterized in that it includes a coal mining machine, a hydraulic support, an air intake tunnel, a main pipeline and an air regulating network, wherein: An air-water nozzle and several 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 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. 30% to 40% of the high-pressure gas of the total volume of the ventilation pipeline enters the mixed flow outlet, and 60% to 70% of the high-pressure gas of the total volume of the ventilation pipeline enters the air flow outlet. The ventilation pipelines 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, and the air regulating network includes a reel, a motor for controlling the reel and the air regulating network body. 2. An air curtain-water curtain triple barrier dust control device for underground mining operations as described in claim 1, characterized in that 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 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 tunnel, playing a role in gas pressurization and pressure regulation. 3. An air curtain-water curtain triple barrier dust control device for underground mining operations as described in claim 1, characterized in that the air regulating network is 3 to 5 m away from the upwind side of the coal mining machine, 300 to 600 mm away from the unmined coal wall, and 400 to 800 mm away from the tunnel floor. 4. An air curtain-water curtain triple barrier dust control device for underground mining operations as described in claim 1, characterized in that a cable trough is installed under the air-water nozzle. 5. An air curtain-water curtain triple barrier dust control device for underground mining operations as described in claim 1, characterized in that the ventilation pipeline is connected to an independent air circuit switch along the support of the hydraulic support. 6. An air curtain-water curtain triple barrier dust control device for underground mining operations as described in claim 1, characterized in that the air regulating net body is a mesh structure, and a counterweight is provided below the air regulating net body. 7. 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 6, characterized in that it comprises the following steps: S1. Fresh air flows into the fully mechanized mining face from the air inlet tunnel and moves to the air regulating net on the upwind side of the coal mining machine. The air regulating net limits the wind speed and air volume of fresh air flowing to the coal mining cutting space and turns to the sidewalk area, so that the static pressure energy in the sidewalk area is higher than the static pressure energy in the coal mining cutting space, resulting in the fresh air flow in the downwind area of the coal mining machine always flowing from the sidewalk to the coal mining cutting space, and the dust-laden air flow is controlled within the coal mining machine cutting area; S2. The air-water nozzle installed on the top area of the hydraulic support uses high-pressure jets to form an air curtain, and uses spray to form a strong water curtain. The strong water curtain collides, aggregates, and settles with the accumulated dust near the coal mining machine. The air curtain intercepts the dust generated by the coal mining machine and the droplets sprayed by the nozzle, forming an air curtain-water curtain barrier; the air curtain-water curtain barrier cooperates with the air regulating network to jointly enhance the dust blocking effect, prevent the high-concentration dust generated by cutting from entering the sidewalk area where people are working, and thus form 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 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 drivers.