A Mining Intelligent Foam Spraying Dust Suppression System and Method

Abstract

This invention relates to an intelligent foam spraying dust suppression system and method for mining, belonging to the field of mine dust control technology. The system includes a three-dimensional spatial matrix spraying device providing various spraying patterns; a fog-penetrating camera for real-time image capture and observation of dust concentration clouds to obtain dust concentration and distribution data; a dust concentration sensor for monitoring dust concentration and transmitting the data to a control system; a flame sensor for detecting smoke and flames in the air to identify ignition sources and transmitting the data to the control system; and a control system that issues operating commands to the three-dimensional spatial matrix spraying device for dust suppression or fire extinguishing based on the dust concentration and flame sensors. The fog-penetrating camera identifies dust dispersion patterns and high-concentration dust dispersion areas to determine the spraying area and intensity. This invention improves dust suppression efficiency and reduces the risk of dust explosions.

Description

Technical Field

[0001] This invention belongs to the field of dust control technology in mining, and particularly relates to an intelligent foam spraying dust suppression system and method for mining, which is used for dust control and explosion prevention in various coal mines, metal mines, tunnels and other places. It is especially suitable for dust disaster control in mining working faces, belt conveyor roadways, centralized transport roadways, auxiliary transport roadways, transfer points and tunnels. Background Technology

[0002] In recent years, with the continuous improvement of the mechanization of mining, mining methods and processes have developed towards high-efficiency and intensive production. Consequently, problems such as natural disasters in mines have become increasingly prominent, especially dust pollution at the bottom of the mine. Mine dust, as an inevitable byproduct of mineral production and processing, is one of the main causes of mine production disasters and a significant factor endangering the lives and occupational health of underground workers. Its natural hazard is mainly manifested in the potential for dust explosions under certain conditions. Its occupational hazard is primarily manifested in the fact that long-term inhalation of dust in the underground working environment easily leads to pneumoconiosis. According to relevant statistics, miners working in high-concentration dust pollution environments for extended periods can develop pneumoconiosis on average within 5 to 10 years. If the silica content in the dust is 80-90%, pneumoconiosis can develop within 1.5 to 2 years, and it is extremely difficult to cure. Currently, common dust control methods used in mine operations include pre-injection of water, dry or wet dust collectors for dust extraction and purification, internal and external spraying of dust suppression equipment, and backpack foam dust suppression. However, due to limitations in application conditions, it is difficult to improve the dust control effect at the work site by using only one prevention and control measure.

[0003] Chinese Patent (Publication No.: CN101251025A, Publication Date: August 27, 2008) discloses a foam dust removal system for underground coal mines. It mainly consists of a metering pump, a foaming agent storage tank, compressed air pipelines, clean water pipelines, a foamer, and foam nozzles. Utilizing existing water pipes at the dust removal site, a small-flow metering pump adds foaming agent to the water pipes. The mixed liquid containing the foaming agent and compressed air simultaneously pass through the foamer, generating a large amount of foam. This foam is then transported through hoses to the foam nozzles, where it is sprayed out in an umbrella shape to cover the dust-generating points. This system provides a simple, reliable, and continuously operating foam dust removal system for underground coal mines. However, this system lacks advanced intelligent sensing capabilities for on-site dust concentration, fire hazards, dust emission and transport patterns, and visual display of dust-permeable fog. It also does not incorporate intelligent control technology to automatically control the actuators to spray foam as needed.

[0004] Chinese patent (publication number: CN110630315A, publication date: December 31, 2019) discloses an intelligent wet dust suppression and emergency disaster reduction device for mines, including a detection component, a central control system, and an execution device. This invention uses dust concentration and temperature sensors installed on the tunnel wall to feed back the real-time dust concentration and temperature in the mine to the central control system. The central control system determines whether the dust concentration exceeds a set threshold and controls a rail-guided trolley to spray dust. If the temperature is higher than the set threshold, fireproof and explosion-proof reagents are added. This device solves the problem of performing automated dynamic dust removal operations in dust-generating areas. However, this device cannot solve problems such as visual monitoring of dust fog, self-tracking and identification of high-concentration dust dispersal clouds, and intelligent full coverage of a three-dimensional rectangular array for foam spraying. As a result, it does not adapt the dust suppression process to the dust generation and movement patterns of different application scenarios in a real-time and effective manner, resulting in poor dust suppression effect.

[0005] Chinese Patent (Publication No.: CN116398133A, Publication Date: July 7, 2023) discloses a dust-blocking device and supporting dust removal system for a tunneling face, as well as its usage method. This invention designs a dust-blocking, explosion-proof transparent door, providing workers with a visible view of the working conditions ahead. However, this transparent door is an airtight, sealed structure. In underground coal mine tunneling faces, airtight sealing devices are not permitted to block the tunneling face, as mine ventilation is the cornerstone of safe coal mine production. Sufficient airflow provides underground workers with ample oxygen, ensuring their safety, expelling large amounts of methane and coal dust, and cooling and dehumidifying the working face. This structure not only instantly causes methane and coal dust to accumulate in the confined space, but the sparks generated when the tunneling machine's cutting teeth peel away coal from the coal face can easily cause methane and coal dust explosions. Furthermore, poor ventilation can easily lead to miners suffocating to death. Meanwhile, the patent clarifies that when the tunneling machine is not in operation, the dust-blocking device can be quickly retracted by rotating the dust-blocking and explosion-proof transparent door, making it parallel to the side of the tunneling face and able to move with the tunneling machine. The drawback of this invention is that installing doors on both sides of the tunneling machine not only increases the load on the machine and affects its operational flexibility, but the door installed on one side of the main tunneling body can also easily trap the operator in a small area, making it impossible to escape in time in the event of a roof collapse or other disaster.

[0006] Therefore, given the characteristics of mine dust such as large dust generation, high ventilation volume leading to dust dispersion, small dust particle size, poor hydrophilicity, wide smoke dispersion range, and small coverage area of ​​existing equipment spraying, which prevent intelligent control and result in poor dust suppression effects, as well as the defects of existing portal sealing structures, there is an urgent need to develop a safer, more efficient, and intelligent foam dust suppression system and method. Summary of the Invention

[0007] To address the shortcomings of existing technologies, this invention provides an intelligent foam spraying dust suppression system and method for mining. This system enables advanced intelligent sensing of dust concentration, fire hazards, dust emission and transport patterns, and visualized dust fog during mining operations. Based on the site environment and current operational status, it tracks and identifies high-concentration dust clouds in real time. Through its own dust-proof mesh structure, it intercepts dust and adaptively sprays a three-dimensional rectangular array of foam, achieving full coverage of dust sources and high-concentration dust areas, thereby improving dust suppression efficiency and reducing the risk of dust explosions.

[0008] A mining intelligent foam dust suppression system includes a three-dimensional spatial matrix spraying device that can be movably installed inside the ore body, providing a variety of spraying areas to suppress dust or extinguish fires in the form of water mist or foam.

[0009] A fog-penetrating camera is installed on top of the three-dimensional spatial matrix spraying device and moves with the device to capture images of the scene and the dust concentration cloud, so as to obtain data on dust concentration and distribution.

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

[0011] Flame sensors are used to detect smoke and flames in the air to locate fire sources;

[0012] When the data detected by any one of the dust concentration sensor and flame sensor exceeds a preset threshold, the control system issues a working command to the three-dimensional spatial matrix spraying device to reduce dust or extinguish fire. At the same time, by using the dust concentration distribution data obtained by the fog-penetrating camera and the dust concentration obtained by the dust concentration sensor, the system can determine the pattern of dust dispersion and the location of high-concentration dust dispersion clouds, thereby determining the area and intensity of spraying required by the three-dimensional spatial matrix spraying device.

[0013] The three-dimensional spatial matrix spraying device is arranged along the tunneling direction of the tunneling machine via a transport mechanism and moves along the tunneling direction.

[0014] The three-dimensional spatial matrix spraying device includes two opposing support frames. An openable door device is installed on the two opposing support frames through a hinge mechanism. The shape of the openable door device is adapted to the tunnel and the tunneling machine. A pneumatic support rod is provided between the support frame and the openable door device.

[0015] The support frame is equipped with rollers, and the transport mechanism is connected to the support frame through the rollers; the rollers roll back and forth in the roller sliding groove, and the rollers are confined within the roller sliding groove to ensure that the three-dimensional spatial matrix spraying device cannot be overturned or tilted, while also limiting the rollers to roll back and forth within the roller sliding groove.

[0016] Each end of the roller sliding groove is equipped with a touch switch to limit the movement of the roller.

[0017] The inlet of the three-dimensional spatial matrix spraying device is the inlet of the openable door device, and the outlet of the three-dimensional spatial matrix spraying device is the nozzle installed on the openable door device. A one-to-one control valve is installed between the nozzle and the openable door device. The opening of different control valves can form spraying areas with different patterns and ranges. The openable door device is also equipped with a dust interception net.

[0018] The openable door device has a hollow, tubular foam supply pipeline system inside, which is connected to the foaming device; an inlet connected to the foam supply pipeline system is provided on one side of the openable door device, and a nozzle is provided on the other side connected to the foam supply pipeline system.

[0019] The intelligent foam dust suppression system for mining includes a feeding device for providing mining dust suppressant. The system supplies water to the foaming device and the feeding device through the mine water supply pipeline and 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 mixing the water supplied to the foaming device from the mine water supply pipeline and the air supplied to the foaming device from the mine compressed air pipeline is then transported to the foaming device.

[0020] The feeding device includes an automatic feeding device, the inlet of which is connected to the mining dust suppressant, and the outlet of which is connected to the feeding port of the liquid dilution tank through a feeding pipeline. A mine water supply pipeline replenishes the liquid dilution tank with clean water. The liquid dilution tank is connected to the inlet of the mining foam dust suppressant through a liquid inlet pipeline, and is connected to a water mist nozzle to spray water mist or to a foam nozzle to spray foam for dust suppression or fire extinguishing. The mining foam dust suppressant can be adjusted in multiple levels to control the suction volume. The mining foam dust suppressant is connected to the air inlet of the mine compressed air pipeline to obtain the power source for the air pump used to extract the liquid.

[0021] A method for intelligent foam dust suppression in mining, employing the aforementioned intelligent foam dust suppression system, specifically includes the following steps:

[0022] Dust concentration sensors monitor on-site dust concentration, flame sensors detect smoke and flames in the air to locate fire sources, and fog-penetrating cameras capture on-site images and capture dust concentration dispersion and 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 dust concentration sensor exceeds the preset threshold, the three-dimensional spatial matrix spraying device is activated to spray and reduce dust.

[0025] Determination of spraying area and intensity of three-dimensional spatial matrix spraying device: The fog-penetrating camera captures the dust concentration 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, and learns the pattern of dust dispersion and the area of ​​high dust concentration dispersion, thereby determining the area and spraying intensity that the three-dimensional spatial matrix spraying device needs to spray.

[0026] The dust suppression or fire extinguishing process ends when the control system receives the dust concentration from the dust concentration sensor, the dust concentration from the dust cloud captured by the fog-penetrating camera, the smoke detection technology of the flame sensor to detect smoke in the air and find a fire source, or the temperature detection technology of the flame sensor to detect that the ambient temperature has dropped to a preset threshold.

[0027] The beneficial effects of this invention are:

[0028] 1. This invention incorporates a fog-penetrating camera, which not only captures real-time operational footage through dust and fog and transmits it back to the host computer on the surface, but also captures real-time concentration and distribution data of dust dispersion clouds. It integrates dust concentration distribution data with data collected by dust concentration sensors, and automatically tracks and identifies high-concentration dust dispersion clouds based on the site environment and current operational status. Through intelligent control, it forms an adaptive, three-dimensional rectangular array of sprayed foam to cover the entire area and reduce dust. Furthermore, by adding fire-extinguishing materials to the mining dust suppressant, it can extinguish fires in the event of a fire.

[0029] 2. This invention includes a winch transport mechanism. When mining operations cease, the three-dimensional spatial matrix spraying device is moved to a working area away from the coal face of the tunneling roadway. It can also close like a door against the roadway wall, without affecting other operations or the passage of personnel and vehicles. When mining operations begin and dust suppression is required, the winch transport mechanism transports the three-dimensional spatial 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 escaping from the dust source for dust suppression operations.

[0030] 3. This invention features a three-dimensional spatial matrix spraying device. This device creatively incorporates dust-catching nets in the spaces where the nozzles are not spraying. These nets not only allow sufficient airflow through the doors to reach the face of the tunnel, but also, under the high-pressure airflow from the wall-mounted ventilation ducts, cause the nets and dust to collide intensely, achieving a physical dust suppression effect. This device can move freely within the tunnel, and the doors can be opened and closed; this flexible design enhances its applicability in mine operations.

[0031] This invention achieves advanced perception of dust concentration areas by self-tracking and identifying high-concentration dust clouds, and intelligently controls the spatial position and intensity of foam spraying from nozzles to fully cover and seal off dust, eliminating dust at the source. It forms a three-dimensional rectangular array of foam spraying with "one policy for each mine, one area for each time", which can effectively improve dust reduction efficiency. When all nozzles are open and the foaming intensity is at its maximum, it can form a thick, substantial "foam blanket" that completely covers and removes all dust clumps.

[0032] 4. The openable door device provided in this invention overcomes the shortcomings of the existing airtight door structure. The door frame and door assembly are placed on fixed tracks on both sides, and when the door is open, it is close to both sides, without obstructing other operating equipment and personnel. Furthermore, the intelligent foam dust suppression system for mining can move along the track to the back of the working face and stop. It will only move to the appropriate position to participate in the work when it is in operation. This versatile and flexible approach enhances its applicability in mine operations.

[0033] 5. This invention provides an intelligent foam dust suppression system for mining. This system acts as a "smart brain," intelligently controlling the foam manufacturing process. By collecting data from flame sensors, dust concentration sensors, and fog-penetrating cameras, the system determines the range and intensity of foam or water spraying. Simultaneously, by activating solenoid valves corresponding to multiple nozzles at different locations, it creates a spatial mesh-like structure of foam and water mist of different shapes sprayed in the direction and range of dust dispersion, thus more easily capturing dust. The system achieves automated material suction, automated mixing, quantitative extraction of the mixed liquid, remote delivery of the mixed liquid, and real-time preparation of the liquid ratio based on the actual dust concentration in the area, enhancing the dust suppression effect. Attached Figure Description

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

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

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

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

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

[0039] in,

[0040] 1-Windlass transport mechanism, 101-Windlass 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-Water inlet pipeline of material dilution tank, 5-Water supply power pipeline for foaming device, 6-Air inlet pipeline for mine foam dust suppression device, 7-Air supply power pipeline for foaming device, 8-Fogging device, 9-Fog penetration camera, 10-Three-dimensional spatial matrix spraying device, 1001-Support frame, 1002-Pneumatic support rod, 1003-Nozzle, 1004-Dust interception net 1005-Folding mechanism, 1006-Load-bearing roller, 1007-Openable door device, 1008-Foam supply pipeline system inlet, 1009-Foam supply pipeline system, 11-Foam body, 12-Flame sensor, 13-Dust concentration sensor, 14-Dust emission zone, 15-Coal face of tunneling roadway, 16-Mining dust suppressant, 17-Inlet pipeline of mining automatic feeding device, 18-Mining automatic feeding device, 19-Feeding pipeline of material dilution tank, 20-Material dilution tank, 21-Inlet pipeline of mining foam dust suppression device, 22-Mining foam dust suppression device, 23 - Belt conveyor, 24- Mixed material inlet pipeline, 25- Tunneling machine, 26- Ore body, 27- Above-ground and underground communication network, 28- Host computer, 29- Large display screen, 30- Winch conveyor control circuit, 31- Material dilution tank water supply pipeline control valve, 32- Foaming device water supply pipeline control valve, 33- Mining 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- Mining automatic feeding device feeding control circuit, 38- Mining automatic feeding device 39-Central processing intelligent control unit; 40-Discharge control valve of mine automatic feeding device; 41-Control circuit of mine automatic feeding device; 42-Feeding control valve of material dilution tank; 43-Water inlet control valve of material dilution tank; 44-Control circuit of mine foam dust suppression device; 45-Air inlet control valve of mine foam dust suppression device; 46-Mixing outlet control valve of mine foam dust suppression device; 47-Control valve control circuit; 48-Control circuit of three-dimensional spatial matrix spraying device; 49-Mixing inlet control valve of foaming device; 50-Nozzle spraying control valve of three-dimensional spatial matrix spraying device. Detailed Implementation

[0041] To better explain and facilitate understanding of the present invention, the technical solution and effects of the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0042] like Figure 1-5As shown, a mining intelligent foam dust suppression system includes a winch transport mechanism 1, which comprises a winch mechanism 101. A wire rope 102 is mounted on the winch mechanism 101 via a fixed pulley block 103. The wire rope 102 is arranged along the tunneling direction of the tunneling machine 25. The wire rope 102 is connected to a three-dimensional spatial matrix spraying device 10, and the wire rope 102 moves around the fixed pulley block 103, driving the three-dimensional spatial matrix spraying device 10 to move.

[0043] The winch transport mechanism 1 can also be a transport mechanism of other types, such as wheeled, tracked, quadrupedal, sliding rail, monorail hoisting, or push-pull.

[0044] The intelligent foam dust suppression system for mining also includes a flame sensor 12 and a dust concentration sensor 13 suspended inside 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 source of fire. When the dust concentration detected by the dust concentration sensor 13 is greater than a preset threshold, dust suppression is performed. 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 the rise in ambient temperature to a preset threshold and determines that there is a flame, fire suppression is performed.

[0045] The three-dimensional spatial matrix spraying device 10 includes two opposing support frames 1001. A fog-penetrating camera 9 is mounted on top of the support frames 1001 and electrically connected to the control system. The fog-penetrating camera 9 captures images of the scene using a long-wave infrared camera and can transmit them to a large ground display screen 29 for display. Simultaneously, the fog-penetrating camera 9 can capture real-time dust concentration clouds to obtain dust concentration magnitude and distribution data, and transmit this data to the control system. The control system uses the dust concentration magnitude and distribution data and the data collected by the dust concentration sensor 13, and performs real-time tracking and status identification of the dust concentration clouds based on the scene environment. Specifically, the fog-penetrating camera 9 captures images of dust clouds at the site to obtain dust concentration data. The dust concentration and distribution data are obtained through the principle of light scattering within the fog-penetrating camera. Higher dust concentration results in more scattered light, thus reducing the light intensity reaching the camera. By measuring the difference between incident and outgoing light intensities, the dust concentration and distribution data are indirectly obtained. This data is then transmitted to the control system. Based on the real-time dynamic data of the dust clouds, the control system determines the pattern of dust dispersion and the location of high-concentration dust clouds, thereby determining the area and intensity to be sprayed by the three-dimensional spatial matrix spraying device 10. The support frame 1001 is equipped with load-bearing wheels 1006 at its bottom, enabling it to move back and forth within the tunnel, bear weight, and move directionally, as well as allowing the door device 1007 to open and close. Two opposing support frames 1001 are equipped with openable and closable door panels 1007 via hinge mechanisms 1005. The shape of the openable and closable door panels 1007 is adapted to the tunnel and the tunneling machine 25. A pneumatic support rod 1002 is provided between the support frames 1001 and the openable and closable door panels 1007. With the assistance of a set of load-bearing wheels 1006, the pneumatic support rod 1002 retracts to open and close the openable and closable door panels 1007, so that it can be opened when there is no dust, thus avoiding interference with other mining operations. The support frame 1001 is equipped with rollers 106, and the steel wire rope 102 is connected to the support frame 1001 through the rollers 106. The rollers 106 roll back and forth in the roller sliding groove 105, which is arranged along the direction of the steel wire rope 102. Due to the fixed connection between the steel wire rope 102 and the three-dimensional spatial matrix spraying device 10, the rollers 106 are confined within the roller sliding groove 105, ensuring that the three-dimensional spatial matrix spraying device 10 cannot be overturned or tilted, while also limiting the rollers 106 to roll back and forth within 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 rollers 106 and prevent the three-dimensional spatial matrix spraying device 10 from leaving the confined working area. A flame sensor 12 and a dust concentration sensor 13 are suspended below the roller sliding groove 105.

[0046] The openable door device 1007 contains a hollow, tubular foam supply pipeline system 1009. One side of the openable door device 1007 has a foam supply pipeline system inlet 1008 connected to the foam supply pipeline system 1009, and the other side has a nozzle 1003 connected to the foam supply pipeline system 1009. A three-dimensional spatial matrix spraying device nozzle spray control valve 50 is installed between the nozzle 1003 and the foam supply pipeline system 1009. A dust interception net 1004 is installed in the open area of ​​the openable door device 1007 where the nozzle 1003 is not located, serving to intercept dust. The generated dust-suppressing foam enters the foam supply pipeline system 1009 through the foam supply pipeline system inlet 1008 and is sprayed out through the nozzle 1003.

[0047] The intelligent foam 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 supplying foam.

[0048] The mine water supply pipeline 2 has branches at its end including a liquid dilution tank inlet pipeline 4 and a foaming device spray water supply power pipeline 5. The mine compressed air pipeline 3 has branches at its end including a mine foam dust suppression device inlet pipeline 6 and a foaming device air supply power pipeline 7, so as to realize the supply of gas and water to the entire system.

[0049] The feeding device includes an automatic feeding device 18 for mining, which is commercially available in this embodiment. The inlet of the automatic feeding device 18 is connected to a mining dust suppressant 16, and the outlet of the automatic feeding device 18 is connected to the inlet of a liquid dilution tank 20 via a feeding pipe 19. The automatic feeding device 18 draws the mining dust suppressant 16 through the inlet pipe 17 and pumps it into the liquid dilution tank 20 through the feeding pipe 19. The mining dust suppressant 16 can be a thickening environmentally friendly mining dust suppressant disclosed in patent number ZL202211473687.1, an environmentally friendly highly wettable dust suppressant disclosed in patent number ZL202211439381.4, or a commercially available ordinary mining dust suppressant. The liquid dilution tank inlet pipe 4 is connected to the inlet of the liquid dilution tank 20 to replenish clean water into the liquid dilution tank 20; a liquid dilution tank water supply pipe control valve 31 is installed on the liquid dilution tank inlet pipe 4. The liquid dilution tank 20 is connected to the inlet end of the mining foam dust suppression device 22 through the mining foam dust suppression device liquid inlet pipe 21. The air pump inside the mining foam dust suppression device 22 pumps the liquid quantitatively and pressurizes it. Under the combined action of the high-pressure water supplied by the foaming device spray water power pipe 5 and the high-pressure gas supplied by the foaming device air power pipe 7, the liquid is sprayed out through the nozzle 1003. It 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; the mining foam dust suppression device 22 can adjust and control the suction volume in multiple levels 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 inlet of the foaming device 8. The inlet of the foaming device 8 is equipped with a foaming device mixing inlet control valve 49, and the outlet of the foaming device 8 is connected to the nozzle spray control valve 50 of the three-dimensional spatial matrix spraying device. The foaming device spray 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 equipped with a foaming device spray water supply power pipeline control valve 35, and a foaming device water supply pipeline control valve 32 is installed on the foaming device spray water supply power pipeline 5. 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 equipped with a foaming device air supply power pipeline control valve 36, and a foaming device air supply pipeline control valve 34 is installed on the foaming device air supply power pipeline 7. The air inlet pipe 6 of the mining foam dust suppression device is connected to the air inlet of the mining foam dust suppression device 22. A control valve 33 for the air supply pipe of the mining foam dust suppression device is installed on the air inlet pipe 6. The mining foam dust suppression device 22 obtains the power source for the air pump to extract the slurry through the air inlet pipe 6. The mixed slurry is pumped into the foaming device 8 through the mixed material inlet pipe 24. The nozzle spray control valve 50 of the three-dimensional spatial matrix spraying device controls the opening and closing of the nozzle 1003 to achieve foam spraying.

[0051] The intelligent foam dust suppression system for mining also includes a control system, which comprises a central processing intelligent control unit 39. The central processing intelligent control unit 39 is connected to a winch transport mechanism 1, a touch switch 104, a fog-penetrating camera 9, a flame sensor 12, a dust concentration sensor 13, a pneumatic support rod 1002, a material dilution tank feeding control valve 42, a material dilution tank water inlet control valve 43, a material dilution tank water supply pipeline control valve 31, a foaming device water supply pipeline control valve 32, and a mining foam dust suppression device air supply pipeline control valve. 33. Air inlet control valve of mining foam dust suppression device; 45. Mixing outlet control valve of mining foam dust suppression device; 46. Air supply pipeline control valve of foaming device; 34. Water supply pipeline control valve of foaming device; 35. Air supply pipeline control valve of foaming device; 36. Mixing inlet control valve of foaming device; 49. Nozzle spray control valve of three-dimensional matrix spraying device; 50. Feeding control valve of mining automatic feeding device; 38. Discharge control valve of mining automatic feeding device; 40. Mining foam dust suppression device; 22. Automatic feeding device; 18. Upper computer; 28. Electrical connection.

[0052] The central processing intelligent control unit 39 intelligently controls the winch transport mechanism 1 through the winch transport mechanism control line 30, and intelligently controls the touch switch 104, fog-penetrating camera 9, flame sensor 12, dust concentration sensor 13, and pneumatic support rod 1002 through the three-dimensional spatial matrix spraying device control line 48. It also controls the material dilution tank feeding control valve 42, material dilution tank water inlet control valve 43, material dilution tank water supply pipeline control valve 31, foaming device water supply pipeline control valve 32, mining foam dust suppression device air supply pipeline control valve 33, mining foam dust suppression device air inlet control valve 45, and mining foam dust suppression device mixing outlet control valve 4 through the control valve control line 47. 6. Control valve 34 for the air supply pipeline of the foaming device; control valve 35 for the water supply pipeline of the foaming device; control valve 36 for the air supply pipeline of the foaming device; control valve 49 for the mixing inlet of the foaming device; control valve 50 for the nozzle spraying of the three-dimensional spatial matrix spraying device; control valve 38 and valve 40 for the automatic feeding device of the mine through the feeding control line 37; control valve 22 for the foam dust suppression device of the mine through the control line 44; control valve 18 for the automatic feeding device of the mine through the control line 41; connect to the upper computer 28 above ground through the communication network 27 above and below ground and display or manually operate on the large display screen 29. The large display screen 29 is equipped with manual operation buttons for the intelligent foam dust suppression system for mining, and displays the on-site operation status. As the roller 106 moves, it monitors the entire roadway in real time; displays dust concentration and a cloud map showing the distribution of dust concentration with different color depths; displays smoke and temperature data from the flame sensor to detect any fire sources on site; and displays real-time data transmission of all equipment during the dust suppression process.

[0053] The intelligent foam dust suppression system for mining includes three control modes: remote control by personnel above ground, automatic control by the central intelligent control unit 39 in the mine, and in-situ control by personnel working underground.

[0054] The method for dust suppression using the aforementioned intelligent foam spraying system for mining is as follows:

[0055] When mining operations are carried out in the mine, the tunneling machine 25 strips off the ore body 26 from the coal face 15 of the tunneling roadway. At the same time, it generates mine dust with characteristics such as high concentration, small particle size, poor hydrophilicity, wide dispersion range like smoke, easy floating and difficult settling. The generation and movement of mine dust will vary depending on the site geological conditions and different tunneling equipment.

[0056] When the dust concentration detected by the dust concentration sensor 13 reaches a preset threshold, the intelligent foam dust suppression system for mining is activated to suppress dust; or when the flame sensor 12 detects smoke in the air using smoke sensing technology and finds a fire source, or when the flame sensor 12 detects an increase in the surrounding temperature using temperature sensing technology and finds it reaches a preset threshold, the intelligent foam dust suppression system for mining is activated to extinguish the fire. The intelligent foam dust suppression system for mining can be activated in three ways: automatically, remotely controlled by surface operators through the large display screen 29 and the host computer 28, or locally operated by on-site personnel using the control panel of the central processing intelligent control unit 39 to activate the central processing intelligent control unit 39.

[0057] After the central processing intelligent control unit 39 is started, it controls the fog-penetrating camera 9 through the fog-penetrating camera control line. The fog-penetrating camera 9 captures real-time operation images through the dust and fog and transmits them back to the host computer 28 on the well and displays them on the large display screen 29. At the same time, the fog-penetrating camera 9 captures the concentration and distribution data of the dust cloud in the dust emission zone 14 in real time and transmits the collected dust concentration 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 through the above two real-time transmitted data, learns the pattern of dust emission and the location of the high-concentration dust emission cloud, and then opens the corresponding position and number of nozzles 1003 to adaptively spray dust reduction in the high-concentration dust emission area. Through the above process, the high-concentration dust emission cloud is tracked and identified in real time according to the on-site environment and the current operation status, and finally the high-concentration dust area is obtained. Then, the central processing intelligent control unit 39 controls the winch mechanism 101 to start via the winch transport mechanism control line 30. The winch mechanism 101 rotates and drives the wire rope 102 to move within the stroke limited by the fixed pulley group 103. The central processing intelligent control unit 39 intelligently regulates the opening of the nozzle spray control valve 50 of the three-dimensional spatial matrix spraying device via the control valve control line 47. Foam is then adaptively sprayed through the nozzle 1003 towards the high dust concentration area, completely covering and sealing off the dust, eliminating dust at the source, and forming a foam three-dimensional spatial rectangular array full-coverage spraying method that is "one policy for one mine, one area for one time".The specific opening positions, number and spraying intensity of said nozzles 1003 can be set according to actual working conditions. When the drum of the roadheader 25 excavates the coal wall 15 at the heading face of the roadway on the upper part of the left section, the central processing intelligent control unit 39 obtains the following sensing information: the dust concentration monitored by the dust concentration sensor 13, the dust concentration value and distribution data obtained from the dust concentration diffusion cloud captured on site by the fog-penetrating camera 9, and whether the flame sensor 12 detects smoke in the air by means of smoke sensing technology to find a fire source and detects that the surrounding temperature rise reaches a preset threshold by means of temperature sensing technology. According to the real-time transmitted and acquired dynamic data of the dust cloud and the fire generation information, the central processing intelligent control unit 39 judges and identifies the law of dust diffusion and the position of the high-concentration dust diffusion cloud, and turns on the required spray control valves 50 for the nozzles of the three-dimensional space matrix spraying device all arranged on the L-shaped upper part in the left-end openable door panel device 1007 corresponding to the upper part of the left section of the coal wall 15 at the roadway heading face in the three-dimensional space matrix spraying device 10. After the spray control valves 50 for the nozzles of the three-dimensional space matrix spraying device open the nozzles 1003, the spray forms a "sun"-shaped spatial net-shaped three-dimensional structure to spray net-shaped foam as in the embodiment. The central processing intelligent control unit 39 controls the distance between the three-dimensional space matrix spraying device 10 and the dust diffusion area 14 according to the measured dust concentration value, and regulates the material suction amount in multiple gears by controlling the mining foam dust reduction device 22, so as to micro-control the output foaming intensity. Said nozzles 1003 can form a series of spatial net-shaped three-dimensional structure spray nets such as rectangular, U-shaped and fishing-net-shaped to achieve full-coverage spraying. When the nozzles 1003 stop spraying outward, dust reduction or fire extinguishing is completed.

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

[0059] When the intelligent mining foam spraying dust reduction system is not in operation, the winch transport mechanism 1 moves the three-dimensional space matrix spraying device 10 to a side away from the coal wall 15 at the roadway heading face. When the intelligent mining foam spraying dust reduction system is required to operate, the rollers 106 move in the roller sliding grooves 105 to a position where the spraying distance matches the diffusion range of the dust source and stop, then the three-dimensional space matrix spraying device 10 starts operation and sprays foam outward. The specific spraying process is as follows:

[0060] The central processing intelligent control unit 39 starts the mine automatic feeding device 18 through the mine automatic feeding device control circuit 41. At the same time, the central processing intelligent control unit 39 opens 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. The central processing intelligent control unit 39 opens the feed control valve 42 of the liquid dilution tank. The mine automatic feeding device 18 pumps the required mine dust suppressant 16 into the liquid dilution tank 20, and the foam solution concentration percentage is 3% to 8%.

[0061] The central processing intelligent control unit 39 opens the water supply pipeline control valve 31 and the water inlet control valve 43 of the liquid dilution tank. The high-pressure mine water supplied by the mine water supply pipeline 2 enters the liquid dilution tank 20 through the water inlet pipeline 4 and is mixed and diluted with the metered mine dust suppressant 16 to obtain a suitable ratio for later use.

[0062] The central processing intelligent control unit 39 opens the control valve 33 of the air supply pipeline and the control valve 45 of the air inlet of the mining foam dust suppression device. The high-pressure gas flow provided by the mine compressed air pipeline 3 enters the air pump in the mining foam dust suppression device 22 through the air inlet pipeline 6 to provide power. The central processing intelligent control unit 39 controls the air pump of the mining foam dust suppression device 22 to start working through the control circuit 44 of the mining foam dust suppression device. It draws the diluted mixed liquid in the liquid dilution tank 20 and pumps it into the mining foam dust suppression device 22 through the liquid inlet pipeline 21. The mining foam dust suppression device 22 can adjust the working frequency of the air pump in multiple levels to control the supply of mixed liquid. At this time, the central processing intelligent control unit 39 opens the mixing outlet control valve 46 of the mining foam dust suppression device. The mixed liquid enters the foaming device 8 through the mixing 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 activates the foaming device water supply pipeline control valve 32 and the foaming device jet water supply power pipeline control valve 35. The high-pressure mine water supplied 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 activates the foaming device air supply pipeline control valve 34 and the foaming device gas supply power pipeline control valve 36. The high-pressure gas flow supplied by the mine compressed air pipeline 3 enters the foaming device 8 through the foaming device gas supply power pipeline 7. After the mixture, high-pressure mine water, and high-pressure gas are fully mixed in the foaming device 8, foaming occurs. After the foam is sprayed out through the nozzle 1003 of the three-dimensional spatial matrix spraying device 10, it accumulates into a foam body 11, similar to a "foam quilt body", which completely covers and removes all dust clumps, preventing mine dust from escaping in the opposite direction to the coal wall 15 at the tunnel face. Meanwhile, 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. It forms an adaptive spraying foam three-dimensional rectangular matrix by intelligently controlling the nozzle spraying control valve 50 of the three-dimensional spatial matrix spraying device, and changes the dust suppression and fire extinguishing schemes in real time to eliminate dust and flames.

Claims

1. A mining intelligent foam dust suppression system, characterized in that: Includes a three-dimensional spatial matrix spraying device (10), which is movably installed inside the ore body (26) and provides a range of spraying areas to suppress dust or extinguish fires in the form of water mist or foam; A fog-penetrating camera (9) is set on top of a three-dimensional spatial matrix spraying device (10) and moves with the three-dimensional spatial matrix spraying device (10) to capture on-site images and capture on-site dust concentration dispersion clouds in order to obtain dust concentration size and distribution data. A dust concentration sensor (13) is suspended inside the ore body (26) to monitor the dust concentration on site and transmit the monitoring data to the control system; Flame sensor (12) is used to detect smoke and flame in the air to find the source of fire; When the data detected by either the dust concentration sensor (13) or the flame sensor (12) exceeds a preset threshold, the control system issues a working command to the three-dimensional spatial matrix spraying device (10) to reduce dust or extinguish fire. At the same time, the dust concentration distribution data obtained by the fog-penetrating camera (9) and the dust concentration obtained by the dust concentration sensor (13) are used to determine the pattern of dust dispersion and the location of high-concentration dust dispersion clouds, thereby determining the area and intensity of spraying required by the three-dimensional spatial matrix spraying device (10). The inlet of the three-dimensional spatial matrix spraying device (10) is the inlet of the openable door device (1007), and the outlet of the three-dimensional spatial matrix spraying device (10) is the nozzle (1003) installed on the openable door device (1007). A one-to-one corresponding control valve is provided between the nozzle (1003) and the openable door device (1007). The opening of different control valves can form spraying areas with different patterns and ranges. A dust intercepting net (1004) is also provided on the openable door device (1007). The openable door device (1007) has a hollow pipe-shaped foam supply pipeline system (1009) inside, which is connected to the foaming device (8); the openable door device (1007) has an inlet on one side that is connected to the foam supply pipeline system (1009), and a nozzle (1003) is set on the other side that is connected to the foam supply pipeline system (1009); The intelligent foam dust suppression system for mining includes a feeding device for providing mining dust suppressant (16). The system supplies water to the foaming device (8) and the feeding device through the mine water supply pipeline (2), and supplies air to the foaming device (8) and the feeding device through the mine compressed air pipeline (3). The feeding device extracts the diluted mining dust suppressant (16) after metering and pumps it into the foaming device (8). The high-pressure mixed liquid generated by mixing 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 jointly transported to the foaming device (8). The feeding device includes an automatic feeding device (18), the inlet of which is connected to the mining dust suppressant (16), and the outlet is connected to the feeding port of the liquid dilution tank (20) through the feeding pipeline (19) of the liquid dilution tank; the mine water supply pipeline (2) replenishes clean water into the liquid dilution tank (20); the liquid dilution tank (20) is connected to the inlet end of the mining foam dust suppression device (22) through the liquid inlet pipeline (21) of the mining foam dust suppression device, and the water mist nozzle is connected to the foaming device (8) to spray water mist or the foam nozzle is connected to the foaming device (8) to spray foam for dust suppression or fire extinguishing. The mining foam dust suppression device (22) can adjust the suction amount in multiple gears; 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.

2. The intelligent foam dust suppression system for mining as described in claim 1, characterized in that: The three-dimensional spatial matrix spraying device (10) is arranged along the tunneling direction of the tunneling machine (25) by a transport mechanism and moves along the tunneling direction.

3. The intelligent foam dust suppression system for mining as described in claim 1, characterized in that: The three-dimensional spatial matrix spraying device (10) includes two opposing support frames (1001). The two opposing support frames (1001) are equipped with an openable door device (1007) via a hinge mechanism (1005). The shape of the openable door device (1007) is adapted to the tunnel and the tunneling machine (25). A pneumatic support rod (1002) is provided between the support frame (1001) and the openable door device (1007).

4. The intelligent foam dust suppression system for mining as described in claim 3, characterized in that: The support frame (1001) is provided with rollers (106), and the transport mechanism is connected to the support frame (1001) through the rollers (106); the rollers (106) roll back and forth in the roller sliding groove (105), and the rollers (106) are confined within the roller sliding groove (105) to ensure that the three-dimensional spatial matrix spraying device (10) cannot be overturned or tilted, while confining the rollers (106) to roll back and forth within the roller sliding groove (105).

5. The intelligent foam dust suppression system for mining as described in claim 4, characterized in that: Each end of the roller sliding groove (105) is provided with a touch switch (104) to limit the movement of the roller (106).

6. A method for intelligent foam dust suppression in mining, employing the intelligent foam dust suppression system for mining as described in any one of claims 1-5, characterized in that, Specifically, the steps include the following: Dust concentration sensor (13) monitors on-site dust concentration; flame sensor (12) detects smoke and flame in the air to find fire sources; fog camera (9) captures on-site images and captures dust concentration dispersion data. The dust concentration sensor (13), flame sensor (12), and fog-penetrating camera (9) transmit the collected information to the control system; When the data value monitored by the flame sensor (12) or dust concentration sensor (13) is greater than the preset threshold, the three-dimensional spatial matrix spraying device (10) is turned on to spray and reduce dust. Determination of spraying area and intensity of three-dimensional spatial matrix spraying device (10): The fog-penetrating camera (9) captures the dust concentration 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 learns the law of dust dispersion and the area of ​​high dust concentration dispersion, thereby determining the area and spraying intensity that the three-dimensional spatial matrix spraying device (10) needs to spray. When the dust concentration received by the control system is the dust concentration of the dust concentration sensor (13), the dust concentration obtained by the fog camera 9 from the dust concentration cloud at the scene, the smoke sensor (12) detects the smoke in the air and finds the fire source, or the flame sensor (12) detects the temperature drop of the surrounding temperature to a preset threshold, the dust suppression or fire extinguishing ends.

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