Mining intelligent foam spraying dust settling system and method

Abstract

The invention relates to a mining intelligent foam spraying dust suppression system and method, and belongs to the technical field of mine dust prevention and control. The system comprises a three-dimensional space matrix spraying device for providing various spraying areas, a fog-penetrating camera, a foam spraying device and a foam spraying device; the camera is used for shooting field real-time pictures and capturing field dust concentration escape cloud clusters so as to obtain dust concentration and distribution data; the dust concentration sensor is used for monitoring on-site dust concentration and transmitting monitoring data to the control system; the flame sensor is used for detecting smoke and flame in the air to find a fire source and transmitting monitoring data to the control system; and the control system sends a working instruction to the three-dimensional space matrix spraying device according to the dust concentration sensor and the flame sensor to carry out dust falling or fire extinguishing, obtains a dust dissipation rule and a dust high-concentration dissipation area through the fog-penetrating camera, and determines the spraying area and intensity. The dust falling efficiency can be improved, and the dust explosion risk can be reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of mine dust prevention and control, and in particular relates to an intelligent mining foam spraying dust reduction system and method, which is used for dust control and explosion prevention in various coal mines, metal mines, tunnels and other places, and is particularly suitable for the control of dust disasters in mining working faces, belt transport lanes, centralized transport lanes, auxiliary transport lanes, transfer points and tunnels. Background Art

[0002] In recent years, with the continuous improvement of the degree of mechanization of mining, the mining methods and processes of mines have developed towards efficient and intensive production. As a result, problems such as natural disasters in mines have become increasingly prominent, especially in the dust pollution problem at the bottom of the mine. Mine dust, as an inevitable product of the production and processing of minerals, is one of the main causes of mine production disasters. It is also an important factor that endangers the life safety and occupational health of underground workers. Its natural disaster is mainly manifested in the dust with explosive hazards that may cause dust explosions under certain conditions. Its occupational hazards are mainly manifested in the fact that miners inhale dust in the bottom of the mine for a long time, which can easily cause pneumoconiosis. According to relevant statistics, miners who work in a high-concentration dust pollution environment for a long time can cause pneumoconiosis in an average of 5 to 10 years. If the silica content in the dust is 80-90%, pneumoconiosis can occur in 1.5 to 2 years, which is extremely difficult to cure. At present, the commonly used dust removal methods at mine operation sites include advance water injection, dry or wet dust collector dust extraction and purification, spray dust reduction inside and outside the tunneling equipment, backpack foam dust reduction, etc. However, due to the limitations of application conditions, it is difficult to improve the dust control effect at the operation site by using a single prevention and control measure.

[0003] A Chinese patent (publication number: CN101251025A, publication date: August 27, 2008) discloses a foam dust removal system for use in coal mines, which is mainly composed of a quantitative addition pump, a foaming agent storage tank, a compressed air pipeline, a clean water pipeline, a foamer and a foam nozzle. The existing water pipe at the dust removal site is used to add the foaming agent to the water pipe by a small flow quantitative addition pump. The mixed liquid containing the foaming agent and the compressed air pass through the foamer at the same time to generate a large amount of foam, which is transported to the foam nozzle through a hose. The foam nozzle sprays the foam in an umbrella shape to cover the dust generating point. The system provides a foam dust removal system for use in coal mines with a simple structure, reliable performance, continuous operation and good dust removal effect; however, the system does not have advanced intelligent perception capabilities for on-site dust concentration, fire, dust emission generation and migration rules, visual display of dust-permeable fog, etc., and does not introduce intelligent control technology to automatically control the actuator to spray foam on demand.

[0004] A Chinese patent (publication number: CN110630315A, publication date: December 31, 2019) discloses an intelligent wet dust reduction and emergency disaster reduction device for mining, including a detection component, a central control system, and an execution device. The invention uses dust concentration and temperature sensors installed on the tunnel wall to feed back the real-time dust concentration and temperature conditions in the mine to the central control system. The central control system determines whether the dust concentration exceeds the set threshold and controls the rail car to spray dust removal. If the temperature is higher than the set threshold, fire-proof and explosion-proof agents are added at the same time. The device solves the problem of performing automated dynamic dust removal operations in dust-producing areas; however, the device cannot solve the problems of visual monitoring of dust-penetrating fog, self-tracking and identification of high-concentration dust escape clouds, and intelligent full coverage of foam spraying three-dimensional rectangular arrays. As a result, the dust generation and migration laws of different application scenarios are not adapted to the dust reduction process in real time and effectively, and the dust reduction effect is poor.

[0005] A Chinese patent (publication number: CN116398133A, publication date: July 7, 2023) discloses a dust-blocking device for a tunneling working face and a matching dust removal system and a method of use. The invention designs a dust-blocking and explosion-proof transparent door that can provide workers with a visible working condition in front, but the transparent door is an airtight closed structure. It is not allowed to use an airtight sealing device that cannot be ventilated to block the front of the tunneling working face in the underground coal mine, because mine ventilation is the cornerstone of safe production in coal mines. Sufficient air volume can provide sufficient oxygen for underground workers, thereby ensuring life safety, discharging a large amount of toxic and harmful gases such as gas and coal dust, cooling the working face and dehumidifying, etc. This structure not only allows gas and coal dust to accumulate in a closed space instantly, but the sparks generated when the cutting teeth of the tunneling machine peel off the coal wall are likely to cause disasters such as gas and coal dust explosions, and poor ventilation can easily cause miners to suffocate and die. At the same time, the patent states that when the tunnel boring machine is not in operation, the dust shielding device can be quickly recovered by rotating the dust shielding and explosion-proof transparent door, so that it is parallel to the side of the tunneling working face and can move with the tunnel boring machine. The disadvantages of this invention are: installing door panels on both sides of the tunnel boring machine not only increases the load of the tunnel boring machine and affects the flexibility of the tunnel boring machine during operation, but the door panels installed by the tunnel boring machine driver on one side of the main body of the tunneling machine also easily trap the operator in a small area, making it impossible to escape in time when disasters such as roof collapse occur.

[0006] Therefore, in view of the characteristics of mine dust production, large dust production, large ventilation volume, easy dust generation, small dust particle size, poor hydrophilicity, wide smoke dispersion range, small spraying range coverage of existing equipment, which makes it difficult to be intelligent, resulting in poor dust reduction effect, and the defects of the existing portal sealing structure, there is an urgent need to develop a safer, more efficient and intelligent foam dust reduction system and method. Summary of the invention

[0007] In view of the shortcomings of the prior art, the present invention provides an intelligent mining foam spraying dust reduction system and method, so as to realize advanced intelligent perception of dust concentration, fire, dust emission generation and migration law, and visual display of dust-permeable fog during mining, and self-track and identify high-concentration dust emission clouds in real time according to the on-site environment and current operating status, intercept dust through its own dust-proof mesh structure and adaptively spray three-dimensional rectangular array foam, so as to achieve full coverage of dust source points and high-dust concentration areas, improve dust reduction efficiency and reduce the risk of dust explosion.

[0008] An intelligent foam spraying dust suppression system for mining, comprising a three-dimensional space matrix spraying device, which is movably arranged inside the ore body and provides a spraying area with a variety of styles and ranges to suppress dust or extinguish fire in the form of water mist or foam;

[0009] The fog-penetrating camera is installed on the top of the three-dimensional space matrix spraying device and moves with the three-dimensional space matrix spraying device to capture the on-site images and capture the on-site dust concentration escape cloud to obtain the dust concentration size and distribution data;

[0010] Dust concentration sensor, suspended inside the ore body, is used to monitor the dust concentration on site and transmit the monitoring data to the control system;

[0011] Flame sensors, which detect smoke and flames in the air to find fire sources;

[0012] When the data monitored by any one of the control system, dust concentration sensor and flame sensor exceeds the preset threshold, a work instruction is issued to the three-dimensional space matrix spraying device to reduce dust or extinguish fire; at the same time, the dust concentration distribution data obtained by the fog-penetrating camera and the dust concentration obtained by the dust concentration sensor are used to obtain the law of dust dispersion and the location of high-concentration dust dispersion clouds, thereby determining the area and spraying intensity that the three-dimensional space matrix spraying device needs to spray.

[0013] The three-dimensional space matrix spraying device is arranged along the excavation direction of the tunnel boring machine through a transportation mechanism and moves along the excavation direction.

[0014] The three-dimensional space matrix spraying device includes two relatively arranged support frames, on which openable and closable door leaf devices are installed through folding mechanisms. The shape of the openable and closable door leaf devices is compatible with the excavation tunnel and the excavator; a pneumatic support rod is arranged between the support frame and the openable and closable door leaf device.

[0015] The support frame is provided with rollers, and the transport mechanism is connected to the support frame via the rollers; the rollers roll back and forth along the roller sliding grooves, and the rollers are confined within the roller sliding grooves, thereby ensuring that the three-dimensional space matrix spraying device cannot flip or tip over, and at the same time confining the rollers to roll back and forth within the roller sliding grooves.

[0016] A touch switch is respectively arranged at both ends of the roller sliding groove to limit the movement of the roller.

[0017] The inlet of the three-dimensional space matrix spraying device is the inlet of the openable and closable door leaf device, and the outlet of the three-dimensional space matrix spraying device is a nozzle arranged on the openable and closable door leaf device. A one-to-one corresponding control valve is arranged between the nozzle and the openable and closable door leaf device. The opening of different control valves can form spraying areas with different styles and ranges; a dust intercepting net is also arranged on the openable and closable door leaf device.

[0018] The interior of the openable and closable door leaf device is a hollow pipe-shaped foam supply pipeline system connected to the foaming device; an inlet connected to the foam supply pipeline system is provided on one side of the openable and closable door leaf device, and a nozzle is arranged on the other side and connected to the foam supply pipeline system.

[0019] The intelligent mining foam spraying dust suppression system includes a feeding device for providing mining dust suppressants. The system supplies water to the foaming device and the feeding device through the mine water supply pipeline, and supplies air to the foaming device and the feeding device through the mine compressed air pipeline. The feeding device extracts the diluted mining dust suppressant after metering and pumps it into the foaming device. The high-pressure mixed liquid generated by the water supplied to the foaming device by the mine water supply pipeline and the air supplied to the foaming device by the mine compressed air pipeline is delivered to the foaming device together.

[0020] The feeding device includes an automatic feeding device, the feeding port of the automatic feeding device is connected to the mining dust suppressant, and the discharging port is connected to the feeding port of the slurry dilution box through the feeding pipeline of the slurry dilution box; the mine water supply pipeline supplies clean water into the slurry dilution box; the slurry dilution box is connected to the inlet end of the mining foam dust suppression device through the mining foam dust suppression device inlet pipeline, and is connected to the water mist nozzle to spray water mist or connected to the foam nozzle to spray foam for dust reduction or fire extinguishing; the mining foam dust suppression device can adjust the suction amount in multiple gears; the mining foam dust suppression device is connected to the air inlet of the mine compressed air pipeline to obtain the air pump power source for extracting slurry.

[0021] A method for intelligent dust suppression by spraying foam for mining, using the above-mentioned intelligent dust suppression system for spraying foam for mining, specifically comprises the following steps:

[0022] The dust concentration sensor monitors the dust concentration on site, the flame sensor detects smoke and flames in the air to find the fire source, and the fog-penetrating camera takes on-site images and captures dust concentration escape distribution data;

[0023] Dust concentration sensors, flame sensors, and fog-penetrating cameras transmit the collected information to the control system;

[0024] When the data value monitored by the flame sensor or the dust concentration sensor is greater than a preset threshold, the three-dimensional space matrix spraying device is turned on to spray and reduce dust;

[0025] Determination of the spraying area and intensity of the three-dimensional space matrix spraying device: The mist-penetrating camera captures the dust concentration dissipation cloud in real time to obtain the dust concentration distribution data and transmits it to the control system. The control system obtains the dynamic data of the dust cloud through the dust concentration distribution data and the data collected by the dust concentration sensor, and learns the law of dust dissipation and the high-concentration dust dissipation area, so as to determine the area and spraying intensity that the three-dimensional space matrix spraying device needs to spray;

[0026] When the control system receives the dust concentration from the dust concentration sensor, the dust concentration obtained by the fog-penetrating camera on site, the flame sensor uses smoke sensing technology to detect smoke in the air to find the fire source, or the flame sensor uses temperature sensing technology to detect that the surrounding temperature has dropped to a preset threshold, the dust reduction or fire extinguishing ends.

[0027] The beneficial effects of the present invention are:

[0028] 1. The present invention is provided with a fog-penetrating camera, which can not only capture the real-time operation picture of the scene through the dust and fog and transmit it back to the upper computer on the well, but also can capture the concentration size and distribution data of the dust concentration escape cloud in real time, fuse and judge the dust concentration distribution data and the data collected by the dust concentration sensor, and self-track and identify the high-concentration dust escape cloud in real time according to the on-site environment and the current operation status, and form an adaptive spray foam three-dimensional space rectangular square array full coverage network to reduce dust through intelligent control; at the same time, on this basis, adding fire extinguishing materials to the mine dust suppressant can play a fire extinguishing role when a fire occurs.

[0029] 2. The present invention is provided with a winch transport mechanism, which can move the three-dimensional space matrix spraying device to an operating area away from the coal wall facing the tunnel when the mining operation is stopped, and can also be closed like a door leaf close to the tunnel wall without affecting the implementation of other operations and the passage of people and vehicles; when dust reduction is required at the beginning of the mining operation, the winch transport mechanism transports the three-dimensional space matrix spraying device to a position that matches the spraying distance controlled by the self-set spray intensity and the high-concentration cloud of dust source escape to perform dust reduction operations.

[0030] 3. The present invention is equipped with a three-dimensional space matrix spraying device, which is creatively equipped with a dust interception net in the space where each nozzle does not spray. The dust interception net can not only allow sufficient air volume to enter the front of the excavation face through the door leaf, but also can make the net and dust collide strongly under the high-pressure airflow blown by the wall-attached wind tube to play a role in physical dust reduction. The device can move freely in the tunnel and the door leaf can be opened and closed. The flexible and changeable design enhances its applicability in mine work.

[0031] The present invention realizes advanced perception of dust concentration areas through self-tracking and identification of high-concentration dust dissipation clouds, intelligently controls the spatial position and intensity of nozzle spraying foam, fully covers and blocks dust, and eliminates dust at the source, forming a "one mine, one policy, one time, one place" three-dimensional foam space rectangular array full coverage spraying, which can greatly improve the dust reduction efficiency. When all nozzles are opened and the foaming intensity is the maximum, a thick and substantial "foam quilt body" can be formed to thoroughly cover and remove all dust clusters.

[0032] 4. The openable and closable door leaf device provided in the present invention overcomes the defects of the closed and airtight door structure in the prior art. The door frame and the door leaf assembly are placed on fixed tracks on both sides. When the door leaf is opened, it is close to the two sides and does not hinder other operating equipment and personnel. In addition, the intelligent spraying foam dust reduction system for mining can be moved along the track to the rear of the working surface and stopped. It will only be moved to the appropriate position to participate in the work when it is in the working state. Such a changeable and flexible method enhances its applicability in mine work.

[0033] 5. The present invention provides an intelligent spraying foam dust reduction system for mining. The system acts as a "smart brain" to intelligently control the foam manufacturing process. The control system collects data from flame sensors, dust concentration sensors, and fog-penetrating cameras to determine the range and intensity of the foam or water spraying. At the same time, by opening the solenoid valves corresponding to multiple numbers of nozzles at different positions, a spatial mesh foam and water mist structure of different shapes is formed in the direction and range of dust dissipation, thereby making it easier to capture dust. The above system realizes automatic material suction, automatic material mixing, quantitative extraction of mixed liquid, remote transportation of mixed liquid, and real-time preparation of the material-liquid ratio according to the actual situation of the dust concentration area on site, thereby enhancing the dust reduction effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 The overall schematic diagram of the intelligent foam spraying dust suppression system for mining provided by the present invention;

[0035] Figure 2 A connection diagram of a control system for an intelligent foam spraying dust suppression system for mining provided by the present invention;

[0036] Figure 3 The overall control system logic block diagram of the intelligent foam spraying dust suppression system for mining provided by the present invention;

[0037] Figure 4 A schematic diagram of the structure of the winch transport mechanism of the intelligent foam spraying dust suppression system for mining provided by the present invention;

[0038] Figure 5 A schematic diagram of the structure of a three-dimensional space matrix spraying device of the intelligent foam spraying dust suppression system for mining provided by the present invention;

[0039] in,

[0040] 1-winch transport mechanism, 101-winch mechanism, 102-wire rope, 103-fixed pulley block, 104-touch switch, 105-roller sliding groove, 106-roller, 2-mine water supply pipeline, 3-mine compressed air pipeline, 4-liquid dilution box water inlet pipeline, 5-foaming device spray water supply power pipeline, 6-mine foam dust suppression device air inlet pipeline, 7-foaming device air supply power pipeline, 8-foaming device, 9-fog penetrating camera, 10-three-dimensional space matrix spraying device, 1001-support frame, 1002-pneumatic support rod, 1003-nozzle, 1004-dust interception net , 1005-folding mechanism, 1006-load-bearing wheel, 1007-openable and closable door leaf device, 1008-foam supply pipeline system inlet, 1009-foam supply pipeline system, 11-foam body, 12-flame sensor, 13-dust concentration sensor, 14-dust escape zone, 15-coal wall at the head of the tunnel, 16-mine dust suppressant, 17-liquid inlet pipeline of automatic feeding device for mine, 18-automatic feeding device for mine, 19-feed liquid dilution box feeding pipeline, 20-feed liquid dilution box, 21-liquid inlet pipeline of mine foam dust suppression device, 22-mine foam dust suppression device, 23 - belt conveyor, 24-mixture liquid inlet pipeline, 25-tunneling machine, 26-ore body, 27-on- and underground communication network, 28-host computer, 29-large display screen, 30-winch transport mechanism control circuit, 31-liquid dilution box water supply pipeline control valve, 32-foaming device water supply pipeline control valve, 33-mine foam dust suppression device air supply pipeline control valve, 34-foaming device air supply pipeline control valve, 35-foaming device jet water supply power pipeline control valve, 36-foaming device air supply power pipeline control valve, 37-mine automatic feeding device feed control circuit, 38-mine automatic feeding device Feed control valve, 39-central processing intelligent control unit, 40-discharge control valve of automatic feeding device for mining, 41-control circuit of automatic feeding device for mining, 42-feeding control valve of liquid dilution box, 43-water inlet control valve of liquid dilution box, 44-control circuit of foam dust suppression device for mining, 45-air inlet control valve of foam dust suppression device for mining, 46-mixing outlet control valve of foam dust suppression device for mining, 47-control circuit of control valve, 48-control circuit of three-dimensional space matrix spraying device, 49-mixing inlet control valve of foaming device, 50-nozzle injection control valve of three-dimensional space matrix spraying device. DETAILED DESCRIPTION

[0041] In order to better explain the present invention and facilitate understanding, the technical solutions and effects of the present invention are described in detail below through specific implementation modes in conjunction with the accompanying drawings.

[0042] like Figure 1-5As shown, an intelligent foam spraying dust suppression system for mining includes a winch transport mechanism 1, wherein the winch transport mechanism 1 includes a winch mechanism 101, and a steel wire rope 102 is installed on the winch mechanism 101 through a fixed pulley block 103; the steel wire rope 102 is arranged along the excavation direction of the tunneling machine 25. The steel wire rope 102 is connected to a three-dimensional space matrix spraying device 10, and the steel wire rope 102 moves around the fixed pulley block 103 to drive the three-dimensional space matrix spraying device 10 to move.

[0043] The winch transport mechanism 1 can also adopt other transport mechanisms such as wheel type, crawler type, four-legged type, slide rail type, monorail hoisting type, push-pull type, etc.

[0044] The intelligent foam spraying dust reduction system for mining also includes a flame sensor 12 and a dust concentration sensor 13 suspended in the ore body 26. The dust concentration sensor 13 is used to monitor the dust concentration on site, and the flame sensor 12 is used to detect smoke and flames in the air to find the fire source. Dust reduction is performed when the dust concentration detected by the dust concentration sensor 13 is greater than a preset threshold value, or when the flame sensor 12 uses smoke sensing technology to detect smoke in the air to find the fire source or the flame sensor 12 uses temperature sensing technology to detect the increase in ambient temperature to a preset threshold value to determine the presence of a flame, fire extinguishing is performed.

[0045] The three-dimensional space matrix spraying device 10 includes two supporting frames 1001 arranged opposite to each other, and the mist-penetrating camera 9 is arranged on the top of the supporting frame 1001 and is electrically connected to the control system. The mist-penetrating camera 9 takes the scene image through the long-wave infrared camera and can transmit it to the ground display screen 29 for display. At the same time, the mist-penetrating camera 9 can capture the dust concentration dissipation cloud group in real time to obtain the dust concentration size and distribution data, and transmit it to the control system. The control system completes the real-time tracking and status identification of the dust concentration dissipation cloud group through the dust concentration size and distribution data and the data collected by the dust concentration sensor 13 according to the scene environment. Specifically, the mist-penetrating camera 9 shoots the dust concentration dissipation cloud at the scene to obtain the dust concentration cloud, and obtains the dust concentration size and distribution data through the light scattering principle of the dust cloud in the mist-penetrating camera. The higher the dust concentration, the more scattered light will be, thereby reducing the light intensity reaching the mist-penetrating camera. By measuring the difference characteristics between the incident light intensity and the outgoing light intensity, the dust concentration size and distribution data are indirectly obtained, and the dust concentration size and distribution data are transmitted to the control system at the same time. The control system judges and identifies the law of dust dissipation and the position of the high-concentration dust dissipation cloud according to the dynamic data of the dust cloud transmitted and obtained in real time, thereby determining the area and spraying intensity that the three-dimensional space matrix spraying device 10 needs to spray. The support frame 1001 is equipped with a load-bearing wheel 1006 at the bottom, which can realize the support frame 1001 to move back and forth in the excavation tunnel, and at the same time realize the load-bearing and directional movement of the support frame 1001 and the opening and closing movement of the openable and closable door leaf device 1007. The two relatively arranged support frames 1001 are provided with an openable and closable door device 1007 via a folding mechanism 1005, and the shape of the openable and closable door device 1007 is adapted to the tunneling tunnel and the tunneling machine 25; a pneumatic support rod 1002 is provided between the support frame 1001 and the openable and closable door device 1007, and the pneumatic support rod 1002 is assisted by a set of load-bearing wheels 1006 to realize the opening and closing of the openable and closable door device 1007 by contraction, so that it can be opened when there is no dust reduction to avoid interfering with other mining operations. The support frame 1001 is provided with a roller 106, and the steel wire 102 is connected to the support frame 1001 through the roller 106; the roller 106 rolls back and forth along the roller sliding groove 105, and the roller sliding groove 105 is arranged along the arrangement direction of the steel wire 102; due to the fixed connection between the steel wire 102 and the three-dimensional space matrix spraying device 10, the roller 106 is limited in the roller sliding groove 105, ensuring that the three-dimensional space matrix spraying device 10 cannot be turned over or tipped, and at the same time, the roller 106 is limited to roll back and forth in the roller sliding groove 105. A touch switch 104 is provided at each end of the roller sliding groove 105 to limit the movement of the roller 106 and prevent the three-dimensional space matrix spraying device 10 from leaving the limited working area. A flame sensor 12 and a dust concentration sensor 13 are suspended at the lower part of the roller sliding groove 105.

[0046] The interior of the openable and closable door leaf device 1007 is a foam supply pipeline system 1009 in the shape of a hollow pipe. A foam supply pipeline system inlet 1008 connected to the foam supply pipeline system 1009 is provided on one side of the openable and closable door leaf device 1007, and a nozzle 1003 connected to the foam supply pipeline system 1009 is provided on the other side. A three-dimensional space matrix spraying device nozzle injection control valve 50 is provided between the nozzle 1003 and the foam supply pipeline system 1009. The empty position of the openable and closable door leaf device 1007 where the nozzle 1003 is not provided is also provided with a dust interception net 1004 to intercept dust. The generated dust reduction foam enters the foam supply pipeline system 1009 through the foam supply pipeline system inlet 1008, and the dust reduction foam is sprayed out through the nozzle 1003.

[0047] The intelligent foam spraying dust suppression system for mining also includes a mine water supply pipeline 2 for water supply, a mine compressed air pipeline 3 for air supply, and a feeding device for manufacturing and providing foam.

[0048] The end of the mine water supply pipeline 2 is branched with a liquid dilution box water inlet pipeline 4 and a foaming device injection water supply power pipeline 5, and the end of the mine compressed air pipeline 3 is branched with a mine foam dust suppression device air inlet pipeline 6 and a foaming device air supply power pipeline 7 to realize the supply of gas and water for the entire system.

[0049] The feeding device includes an automatic feeding device 18 for mining, and a commercially available automatic feeding device is used in this embodiment. The feeding port of the automatic feeding device 18 for mining is connected to the mining dust suppressant 16, and the discharge port of the automatic feeding device 18 for mining is connected to the feeding port of the liquid dilution box 20 through the liquid dilution box feeding pipeline 19. The automatic feeding device 18 for mining extracts the mining dust suppressant 16 through the liquid inlet pipeline 17 of the automatic feeding device for mining, and pumps the mining dust suppressant 16 into the liquid dilution box 20 through the liquid dilution box feeding pipeline 19. The mining dust suppressant 16 can be a thickening type mining environmentally friendly dust suppressant disclosed in Patent No. ZL202211473687.1, an environmentally friendly high-wet dust suppressant disclosed in Patent No. ZL202211439381.4, or a commercially available ordinary mining dust suppressant. The feed liquid dilution box water inlet pipeline 4 is connected to the water inlet of the feed liquid dilution box 20 to supply clean water into the feed liquid dilution box 20; a feed liquid dilution box water supply pipeline control valve 31 is provided on the liquid dilution box water inlet pipeline 4. The feed liquid dilution box 20 is connected to the inlet end of the mining foam dust suppression device 22 through the mining foam dust suppression device liquid inlet pipeline 21, and the air pump inside the mining foam dust suppression device 22 pressurizes and pumps the liquid quantitatively, and under the joint action of the high-pressure water supplied by the foaming device spray water supply power pipeline 5 and the high-pressure gas supplied by the foaming device air supply power pipeline 7, the liquid is sprayed through the nozzle 1003, connected to the water mist nozzle 1003 to spray water mist or connected to the foam nozzle 1003 to spray foam for dust suppression; the mining foam dust suppression device 22 can adjust and control the material suction amount in multiple gears to micro-control the output foaming intensity.

[0050] Preferably, in this embodiment, the mixing outlet of the mining foam dust suppression device 22 is connected to the feeding port of the foaming device 8, the feeding port of the foaming device 8 is provided with a foaming device mixing inlet control valve 49, and the discharge port of the foaming device 8 is connected to the three-dimensional space matrix spraying device nozzle injection control valve 50; the foaming device injection water supply power pipeline 5 is connected to the water inlet of the foaming device 8, the water inlet of the foaming device 8 is provided with a foaming device injection water supply power pipeline control valve 35, and the foaming device injection water supply power pipeline 5 is provided with a foaming device water supply pipeline control valve 32. The foaming device air supply power pipeline 7 is connected to the air inlet of the foaming device 8, the air inlet of the foaming device 8 is provided with a foaming device air supply power pipeline control valve 36, and the foaming device air supply pipeline control valve 34 is provided on the foaming device air supply power pipeline 7. The mine foam dust suppression device air inlet pipeline 6 is connected to the air inlet of the mine foam dust suppression device 22. The mine foam dust suppression device air supply pipeline control valve 33 is provided on the mine foam dust suppression device air inlet pipeline 6. The mine foam dust suppression device 22 obtains the air pump power source for extracting the material liquid through the mine foam dust suppression device air inlet pipeline 6. The mixed material liquid is pumped into the foaming device 8 through the mixed material liquid inlet pipeline 24; the three-dimensional space matrix spraying device nozzle injection control valve 50 controls the nozzle 1003 to open and close to realize the spraying of foam.

[0051] The intelligent foam spraying dust suppression system for mining also includes a control system, which includes a central processing intelligent control unit 39, the central processing intelligent control unit 39 and the winch transport mechanism 1, the touch switch 104, the fog camera 9, the flame sensor 12, the dust concentration sensor 13, the pneumatic support rod 1002, the liquid dilution box feeding control valve 42, the liquid dilution box water inlet control valve 43, the liquid dilution box water supply pipeline control valve 31, the foaming device water supply pipeline control valve 32, the mining foam dust suppression device air supply pipeline control valve 33. The air inlet control valve 45 of the mining foam dust suppression device, the mixing outlet control valve 46 of the mining foam dust suppression device, the air supply pipeline control valve 34 of the foaming device, the injection water supply power pipeline control valve 35 of the foaming device, the air supply power pipeline control valve 36 of the foaming device, the mixing inlet control valve 49 of the foaming device, the nozzle injection control valve 50 of the three-dimensional space matrix spraying device, the feed control valve 38 of the mining automatic feeding device, the discharge control valve 40 of the mining automatic feeding device, the mining foam dust suppression device 22, the automatic feeding device 18, and the host computer 28 are electrically connected.

[0052] The central processing intelligent control unit 39 intelligently controls the winch transport mechanism 1 through the winch transport mechanism control circuit 30, intelligently controls the touch switch 104, the fog-penetrating camera 9, the flame sensor 12, the dust concentration sensor 13, and the pneumatic support rod 1002 through the three-dimensional space matrix spraying device control circuit 48, and controls the feed liquid dilution box feeding control valve 42, the feed liquid dilution box water inlet control valve 43, the feed liquid dilution box water supply pipeline control valve 31, the foaming device water supply pipeline control valve 32, the mining foam dust suppression device air supply pipeline control valve 33, the mining foam dust suppression device air inlet control valve 45, and the mining foam dust suppression device mixing outlet control valve 46 through the control valve control circuit 47. 6. Foaming device air supply pipeline control valve 34, foaming device jet water supply power pipeline control valve 35, foaming device air supply power pipeline control valve 36, foaming device mixing inlet control valve 49, three-dimensional space matrix spraying device nozzle injection control valve 50; control the mine automatic feeding device feed control valve 38 and the mine automatic feeding device discharge control valve 40 through the mine automatic feeding device feed control circuit 37; control the mine foam dust suppression device 22 through the mine foam dust suppression device control circuit 44; control the automatic feeding device 18 through the mine automatic feeding device control circuit 41; connect with the upper computer 28 on the well through the uphole and underground communication network 27 and display on the large display screen 29 or operate manually. The large display screen 29 is provided with manual operation buttons of the intelligent foam spraying dust reduction system for mining, and displays the on-site operation status at the same time, and monitors the status of the entire tunnel in real time as the roller 106 moves; displays dust concentration and a representative dust concentration distribution demonstration cloud map with different color depth characteristics; displays the smoke and temperature sensing data of the flame sensor to detect whether there is a fire source on site; and displays the real-time data transmission of all equipment during the system dust reduction process.

[0053] The intelligent foam spraying dust suppression system for mines includes three control modes: manual remote control from above ground, automatic control by the central processing intelligent control unit 39 in the mine, and manual on-site control by workers in the mine.

[0054] The method for dust reduction using the above-mentioned intelligent spraying foam dust reduction system for mining is as follows:

[0055] When the mine carries out mining operations, the tunnel boring machine 25 will strip off the ore body 26 of the coal wall 15 at the head of the tunnel, and at the same time, it will produce mine dust with the characteristics of high concentration, small particle size, poor hydrophilicity, wide smoke dispersion range, easy floating and difficult sedimentation. Mine dust will have different dust dispersion generation and migration rules depending on the on-site geological conditions and tunneling equipment.

[0056] When the dust concentration detected by the dust concentration sensor 13 reaches a preset threshold, the intelligent foam spraying dust reduction system for mining is turned on to reduce dust; or when the flame sensor 12 uses smoke sensing technology to detect smoke in the air to find the source of fire or the flame sensor 12 uses temperature sensing technology to detect that the rise in ambient temperature reaches a preset threshold, the intelligent foam spraying dust reduction system for mining is turned on to extinguish the fire. There are three ways to turn on the intelligent foam spraying dust reduction system for mining, namely: automatic start, the operator on the well observes and operates the upper computer 28 through the display screen 29 for remote control, and the mining site operator operates the control panel of the central processing intelligent control unit 39 on site to start the central processing intelligent control unit 39.

[0057] After the central processing intelligent control unit 39 is started, the fog-penetrating camera 9 is controlled through the fog-penetrating camera control line. The fog-penetrating camera 9 captures the real-time operation picture on site through the dust and fog, transmits it back to the upper computer 28 on the well and displays it on the large display screen 29; at the same time, the fog-penetrating camera 9 captures the concentration size and distribution data of the dust concentration dispersion cloud group, i.e., the dust cloud, in the dust dispersion area 14 in real time, and transmits the collected dust concentration size and distribution data to the central processing intelligent control unit 39. At the same time, the dust concentration sensor 13 transmits the collected dust concentration data to the central processing intelligent control unit 39. The central processing intelligent control unit 39 obtains the dynamic data of the dust cloud group through the above two real-time transmitted data, and obtains the law of dust dispersion and the position of the high-concentration dust dispersion cloud group, thereby opening the corresponding position and number of nozzles 1003 to perform adaptive spraying and dust reduction for the high-concentration dust dispersion area. Through the above process, real-time self-tracking and identification of the high-concentration dust dispersion cloud group according to the on-site environment and the current operation status are realized, and finally the high-concentration dust area is obtained. Then the central processing intelligent control unit 39 controls the winch mechanism 101 to start through the winch transport mechanism control circuit 30, and the winch mechanism 101 rotates and drives the wire rope 102 to move within the stroke limited by the fixed pulley block 103. The central processing intelligent control unit 39 intelligently controls the opening of the nozzle injection control valve 50 of the three-dimensional space matrix spraying device through the control valve control circuit 47, and adaptively sprays foam at the high dust concentration area through the nozzle 1003, fully covering and sealing the dust, eliminating dust from the source, forming a foam three-dimensional space rectangular square array full coverage spraying method of "one mine, one policy, one time, one area".The specific opening position, quantity, and spraying intensity of the nozzle 1003 can be set according to the actual working conditions. When the cutting drum of the roadheader 25 is excavating the coal wall 15 at the upper part of the left cross-section of the roadway heading face, the central processing intelligent control unit 39 obtains the dust concentration monitored by the dust concentration sensor 13, the dust concentration size and distribution data obtained by the fog-penetrating camera 9 by photographing the dust concentration dispersion cloud mass at the scene, and the perception information such as the fire source detected by the flame sensor 12 using the smoke sensing technology and whether the surrounding temperature rise detected by the temperature sensing technology reaches the pre-set threshold. The central processing intelligent control unit 39 judges and identifies the law of dust dispersion and the position of the high-concentration dust dispersion cloud mass according to the dynamic data of the dust cloud mass and the flame generation information transmitted and obtained in real time, and opens the spray control valves 50 of all the L-shaped upper part of the three-dimensional space matrix spraying device nozzles corresponding to the upper part of the left cross-section of the coal wall 15 at the roadway heading face in the left end openable door leaf device 1007 of the three-dimensional space matrix spraying device 10. After the spray control valves 50 of the three-dimensional space matrix spraying device nozzles open the nozzles 1003, a "day"-shaped space network three-dimensional structure spray reticulated foam as in the example is sprayed. The central processing intelligent control unit 39 controls the distance between the three-dimensional space matrix spraying device 10 and the dust dispersion area 14 according to the measured dust concentration size, and controls the multi-stage regulation of the material suction amount of the mine-used foam dust suppression device 22 to micro-control the output foaming intensity. The nozzle 1003 can form a series of space network three-dimensional structure spray nets such as rectangular, U-shaped, and fishing net-shaped to achieve full-coverage spraying. When the nozzle 1003 stops spraying outward, the dust suppression or fire extinguishing ends.

[0058] The mine-used intelligent spraying foam dust suppression system can not only suppress dust, but also play a role in fire extinguishing when a fire occurs by adding fire extinguishing materials to the mine-used dust suppressant 16. The support frame 1001 set on the three-dimensional space matrix spraying device 10 realizes intelligent control of movement and positioning through the fixed connection of the roller 106 with the steel wire rope 102 and the electrical connection of the central processing intelligent control unit 39.

[0059] When the mine-used intelligent spraying foam dust suppression system is not working, the winch transportation mechanism 1 moves the three-dimensional space matrix spraying device 10 to a side far away from the coal wall 15 at the roadway heading face. When the mine-used intelligent spraying foam dust suppression system needs to work, it moves through the roller 106 in the roller sliding groove 105 to a position where the spraying distance is adapted to the dust source dispersion range and stops, and then the three-dimensional space matrix spraying device 10 starts to work and sprays foam outward. The specific spraying process is as follows:

[0060] The central processing intelligent control unit 39 starts the automatic feeding device 18 for mining through the automatic feeding device control circuit 41 for mining. At the same time, the central processing intelligent control unit 39 opens the automatic feeding device feed control valve 38 and the automatic feeding device discharge control valve 40 for mining through the automatic feeding device feed control circuit 37 for mining. The central processing intelligent control unit 39 opens the feed control valve 42 of the liquid dilution box. The automatic feeding device 18 for mining measures and draws the required mining dust suppressant 16 into the liquid dilution box 20. The concentration percentage of the foam solution is 3% to 8%.

[0061] The central processing intelligent control unit 39 opens the slurry dilution box water supply pipeline control valve 31 and the slurry dilution box water inlet control valve 43. The high-pressure mine water provided by the mine water supply pipeline 2 enters the slurry dilution box 20 through the slurry dilution box water inlet pipeline 4, and is mixed and diluted with the measured mining dust suppressant 16 to obtain a suitable ratio for standby use.

[0062] The central processing intelligent control unit 39 opens the air supply pipeline control valve 33 and the air inlet control valve 45 of the mining foam dust suppression device. The high-pressure gas airflow provided by the mine compressed air pipeline 3 enters the air pump in the mining foam dust suppression device 22 through the mining foam dust suppression device air inlet pipeline 6 to provide a power source; the central processing intelligent control unit 39 controls the mining foam dust suppression device 22 air pump through the mining foam dust suppression device control circuit 44 to start working, extracts the diluted mixed liquid in the liquid dilution box 20, and pumps it into the mining foam dust suppression device 22 through the mining foam dust suppression device liquid inlet pipeline 21. The mining foam dust suppression device 22 can control the supply amount of the mixed liquid by adjusting the working frequency of the air pump in multiple gears; at this time, the central processing intelligent control unit 39 opens the mining foam dust suppression device mixing outlet control valve 46, and the mixed liquid enters the foaming device 8 through the mixed liquid inlet pipeline 24 under the pumping of the air pump of the mining foam dust suppression device 22. The central processing intelligent control unit 39 starts the foaming device water supply pipeline control valve 32 and the foaming device jet water supply power pipeline control valve 35, and the high-pressure mine water provided by the mine water supply pipeline 2 enters the foaming device 8 through the foaming device jet water supply power pipeline 5, providing a power source for the foaming device 8 to spray foam. The central processing intelligent control unit 39 starts the foaming device air supply pipeline control valve 34 and the foaming device air supply power pipeline control valve 36, and the high-pressure gas airflow provided by the mine compressed air pipeline 3 enters the foaming device 8 through the foaming device air supply power pipeline 7. The mixed material, high-pressure mine water, and high-pressure gas are fully mixed in the foaming device 8 and then foamed. The foam is sprayed out through the nozzle 1003 of the three-dimensional space matrix spraying device 10 and then accumulates into a foam body 11, which is similar to a "foam quilt body", which completely covers and removes all dust groups, and prevents the mine dust from escaping in the opposite direction of the coal wall 15 facing the excavation tunnel. At the same time, the sprayed foam can capture mine dust in the air. The central processing intelligent control unit 39 receives data from the dust concentration sensor 13, the flame sensor 12, and the fog-penetrating camera 9 in real time, and forms an adaptive three-dimensional rectangular array of spraying foam through intelligent control of the nozzle injection control valve 50 of the three-dimensional matrix spraying device, and changes the dust reduction and fire extinguishing schemes in real time to eliminate dust and flames.

Claims

1. An intelligent foam spraying dust suppression system for mining, characterized by: It comprises a three-dimensional space matrix spraying device (10), which is movably arranged inside the ore body (26) and provides a spraying area with a variety of styles and ranges to reduce dust or extinguish fire in the form of water mist or foam; A mist-penetrating camera (9) is arranged on the top of the three-dimensional space matrix spraying device (10), moves with the three-dimensional space matrix spraying device (10), and is used to shoot on-site images and capture on-site dust concentration escape clouds to obtain dust concentration size and distribution data; A dust concentration sensor (13), suspended inside the ore body (26), is used to monitor the dust concentration on site and transmit the monitoring data to the control system; A flame sensor (12) for detecting smoke and flames in the air to find the source of fire; The control system issues a work instruction to the three-dimensional space matrix spraying device (10) to reduce dust or extinguish fire when the data monitored by any one of the dust concentration sensors (13) and the flame sensor (12) exceeds a preset threshold; at the same time, the dust concentration distribution data obtained by the mist-penetrating camera (9) and the dust concentration obtained by the dust concentration sensor (13) are used to obtain the law of dust dispersion and the location of the high-concentration dust dispersion cloud, thereby determining the area and spraying intensity that the three-dimensional space matrix spraying device (10) needs to spray.

2. The intelligent foam spraying dust suppression system for mining according to claim 1 is characterized in that: The three-dimensional space matrix spraying device (10) is arranged along the excavation direction of the excavator (25) through a transportation mechanism and moves along the excavation direction.

3. The intelligent foam spraying dust suppression system for mining according to claim 1 is characterized in that: The three-dimensional space matrix spraying device (10) comprises two supporting frames (1001) arranged opposite to each other, and an openable and closable door leaf device (1007) is installed on the two supporting frames (1001) arranged opposite to each other through a folding mechanism (1005), and the shape of the openable and closable door leaf device (1007) is compatible with the excavation tunnel and the excavator (25); a pneumatic support rod (1002) is arranged between the supporting frame (1001) and the openable and closable door leaf device (1007).

4. The intelligent foam spraying dust suppression system for mining according to claim 3 is characterized in that: The support frame (1001) is provided with a roller (106), and the transport mechanism is connected to the support frame (1001) via the roller (106); the roller (106) rolls back and forth along the roller sliding groove (105), and the roller (106) is confined in the roller sliding groove (105), thereby ensuring that the three-dimensional space matrix spraying device (10) cannot be turned over or tipped over, and at the same time, the roller (106) is confined to roll back and forth in the roller sliding groove (105).

5. The intelligent foam spraying dust suppression system for mining according to claim 4 is characterized in that: A touch switch (104) is provided at each end of the roller sliding groove (105) to limit the movement of the roller (106).

6. The intelligent foam spraying dust suppression system for mining according to claim 1 is characterized in that: The inlet of the three-dimensional space matrix spraying device (10) is the inlet of the openable and closable door leaf device (1007), and the outlet of the three-dimensional space matrix spraying device (10) is a nozzle (1003) arranged on the openable and closable door leaf device (1007). A one-to-one corresponding control valve is arranged between the nozzle (1003) and the openable and closable door leaf device (1007), and the opening of different control valves can form spraying areas with different styles and ranges; the openable and closable door leaf device (1007) is also provided with a dust interception net (1004).

7. The intelligent foam spraying dust suppression system for mining according to claim 3 is characterized by: The interior of the openable and closable door leaf device (1007) is a foam supply pipeline system (1009) in the form of a hollow pipe, which is connected to the foaming device (8); an inlet connected to the foam supply pipeline system (1009) is provided on one side of the openable and closable door leaf device (1007), and a nozzle (1003) is provided on the other side and is connected to the foam supply pipeline system (1009).

8. The intelligent foam spraying dust suppression system for mining according to claim 7 is characterized in that: The intelligent mining foam spraying dust suppression system comprises a feeding device for providing mining dust suppressants (16). The system supplies water to a foaming device (8) and a feeding device through a mine water supply pipeline (2), and supplies air to the foaming device (8) and the feeding device through a mine compressed air pipeline (3). The feeding device extracts the diluted mining dust suppressant (16) after metering and pumps the mining dust suppressant (16) into the foaming device (8). The high-pressure mixed liquid generated by mixing with the water supplied to the foaming device (8) by the mine water supply pipeline (2) and the air supplied to the foaming device (8) by the mine compressed air pipeline (3) is delivered to the foaming device (8).

9. The intelligent foam spraying dust suppression system for mining according to claim 8 is characterized in that: The feeding device comprises an automatic feeding device (18), the feeding port of the automatic feeding device (18) is connected to the mining dust suppressant (16), and the discharging port is connected to the feeding port of the liquid dilution box (20) through the liquid dilution box feeding pipeline (19); the mine water supply pipeline (2) supplies clean water to the liquid dilution box (20); the liquid dilution box (20) is connected to the inlet end of the mining foam dust suppression device (22) through the mining foam dust suppression device liquid inlet pipeline (21), and is connected to the water mist nozzle (1003) to spray water mist or connected to the foam nozzle (1003) to spray foam for dust suppression or fire extinguishing; the mining foam dust suppression device (22) can be adjusted in multiple gears to control the suction amount; the mining foam dust suppression device (22) is connected to the air inlet of the mine compressed air pipeline (3) to obtain the air pump power source for extracting liquid.

10. A method for intelligent dust suppression by spraying foam for mining, using the intelligent dust suppression system for spraying foam for mining as claimed in any one of claims 1 to 9, characterized in that: The specific steps include: The dust concentration sensor (13) monitors the dust concentration on site, the flame sensor (12) detects smoke and flames in the air to find the fire source, and the fog-penetrating camera (9) takes pictures of the site and captures dust concentration dispersion distribution data; The dust concentration sensor (13), the flame sensor (12), and the fog-penetrating camera (9) transmit the collected information to the control system; When the data value monitored by the flame sensor (12) or the dust concentration sensor (13) is greater than a preset threshold value, the three-dimensional space matrix spraying device (10) is turned on to spray and reduce dust; Determination of the spraying area and intensity of the three-dimensional space matrix spraying device (10): The mist-penetrating camera (9) captures the dust concentration dissipation cloud in real time to obtain dust concentration distribution data and transmits it to the control system. The control system obtains the dynamic data of the dust cloud through the dust concentration distribution data and the data collected by the dust concentration sensor (13), and obtains the law of dust dissipation and the dust high concentration dissipation area, thereby determining the area and spraying intensity that the three-dimensional space matrix spraying device (10) needs to spray; When the control system receives the dust concentration from the dust concentration sensor (13), the dust concentration obtained by the mist-penetrating camera 9 when capturing the dust concentration cloud on site, the flame sensor (12) detects the smoke in the air using smoke sensing technology to find the fire source, or the flame sensor (12) detects the ambient temperature dropping to a preset threshold using temperature sensing technology, dust reduction or fire extinguishing ends.

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