Experimental system and method for simulating intelligent spray cooling and dust falling of coal mine driving working face

Abstract

The invention discloses an experimental system and method for simulating intelligent spray cooling and dust falling of a coal mine driving working face. A roadway simulation assembly comprises a simulation box body and a baffle; the temperature control module comprises a heating medium, a heating resistance wire and a temperature controller and is used for adjusting the roadway temperature; the air flow regulation and control module comprises a first fan, a first temperature heater, a first valve and a ventilation pipeline and is used for supplying air flow. The spraying regulation and control module comprises a water pumping device, a water conveying pipeline, a second temperature heater, a flow controller and a spraying assembly and is used for simulating spraying operation. The coal dust generation module comprises a dust bin, a dust conveying belt, a fan II, a dust conveying pipeline and a dust diffuser, and is used for simulating dust generation; the effect monitoring module comprises a temperature and dust concentration sensor and is used for monitoring the cooling and dust falling effects. The method comprises the following steps: simulating different temperatures, dust volumes, air volumes and spraying volumes of a driving working face to obtain cooling and dust-falling effects of different spraying schemes. According to the invention, cooling and dust falling effects of different spraying schemes can be obtained through simulation.

Description

Technical Field

[0001] This invention belongs to the field of intelligent spray cooling technology, specifically an experimental system and method for simulating intelligent spray cooling and dust suppression in coal mine tunneling faces. Background Technology

[0002] With the large-scale mining of coal resources, the mining depth has gradually shifted to depths of thousands of meters, bringing with it the problem of high-temperature heat hazards. Extensive data shows that the rock temperature at depths of thousands of meters can exceed 35℃, significantly exceeding the 26℃ limit stipulated in the "Coal Mine Safety Regulations." Simultaneously, the use of large-scale tunneling equipment has greatly increased heat generation, leading to severely excessive ambient temperatures at the tunneling face. High temperatures disrupt the body's water-salt balance, causing sluggish reactions and decreased motivation among workers, severely impacting their physical and mental health, reducing work efficiency, and increasing the risk of accidents. Dust pollution, one of the five major hazards in mines, is increasingly prevalent due to the widespread use of mechanized equipment at tunneling faces, resulting in a significant increase in dust generation. Workers exposed to high dust concentrations for extended periods have a significantly increased probability of developing pneumoconiosis. Furthermore, the large amount of dust obstructs visibility, greatly increasing the accident rate during operations.

[0003] High temperatures and dust pollution not only threaten the occupational health of workers but also increase the risk of accidents during operations, posing significant challenges to safe, efficient, and green mining. To address these issues, spray cooling and dust suppression technology has been applied in underground coal mine operations. By spraying cold water into the roadways, the cold water significantly reduces the temperature of the surrounding rock and airflow, thereby lowering the working environment temperature. Furthermore, the small water droplets generated by the spray combine with dust particles, accelerating dust settling and effectively reducing dust concentration at the working face and in the roadways. This is crucial for protecting the health and safety of workers. However, current research on spray cooling and dust suppression is limited, mainly focusing on spray materials and numerical simulations. The development of spray schemes remains unscientific. Therefore, there is an urgent need to research experimental devices and testing methods related to spray cooling and dust suppression to guide the scientific development of spray schemes.

[0004] CN216013270U discloses an experimental device for simulating the dust suppression and cooling effect of underground spraying. This device uses a dust preparation module to generate polluted air, a high-pressure spray module to purify the airflow, and a wastewater discharge module to purify the device. The dust suppression and cooling efficiency is calculated based on data from a data acquisition module. The device simulates the conventional roadway spraying cooling and dust suppression process, but it differs significantly from the actual working face scenario. CN114324091A discloses a laboratory device for simulating the time-varying patterns of dust in mine roadways. This device simulates the roadway, dust generation, cutterhead, ventilation duct, spraying, and monitoring devices, providing a relatively realistic simulation of dust generation, but it neglects the influence of the tunneling machine and temperature and humidity on dust. CN108756996A discloses a mine thermal and humidity environment simulation experimental platform. This platform uses multiple control units to control the temperature and humidity of the roadway, simulating both summer and winter working conditions in tunneling roadways, but it ignores the influence of roadway ventilation on temperature and humidity. In order to effectively address the shortcomings of existing technologies, there is an urgent need to provide an experimental system and method for simulating intelligent spray cooling and dust suppression at coal mine tunneling faces. Summary of the Invention

[0005] To address the problems existing in the prior art, this invention provides an experimental system and method for simulating intelligent spray cooling and dust suppression at a coal mine tunneling face. This system has a simple structure and low manufacturing cost. It can fully simulate the spray cooling and dust suppression conditions at a coal mine tunneling face and intelligently change various environmental parameters and cooling and dust suppression schemes. It can obtain cooling and dust suppression effects from different spray schemes, providing reliable technical support for the design of actual on-site spray cooling and dust suppression schemes. This method features a simple simulation operation process, a high degree of intelligence, and ideal simulation results. It can efficiently and accurately obtain the cooling and dust suppression effects of different spray schemes, which is beneficial for developing more scientific spray schemes for on-site cooling and dust suppression.

[0006] To achieve the above objectives, the present invention provides an experimental system for simulating intelligent spray cooling and dust suppression in a coal mine tunneling face, comprising a roadway simulation component, a temperature control module, an airflow control module, a spray control module, a coal dust generation module, an effect monitoring module, and a sewage discharge and sludge removal module. The tunnel simulation component includes a simulation box, a straight baffle, and an L-shaped baffle. The central area of ​​the simulation box has a T-shaped tunnel simulation space, comprising a longitudinally distributed main tunnel space and transversely distributed auxiliary tunnel spaces. The front end of the main tunnel space extends to the front end of the simulation box, and the middle section of the auxiliary tunnel space connects to the rear end of the main tunnel space. Its left and right ends and rear end extend to the left and right ends and rear end of the simulation box, respectively. The straight baffle is fixedly installed at the front end of the simulation box and blocks the front end of the main tunnel space. The L-shaped baffle is fixedly installed at the rear end of the simulation box and blocks the rear end and right end of the auxiliary tunnel space. The simulation box has media-carrying spaces on both sides of the main tunnel space. The temperature control module includes a heating medium, heating resistance wires, and a temperature controller. The heating medium is filled in the medium carrying space. Two sets of heating resistance wires are respectively arranged in the medium carrying space. The temperature controller is located on the outside of the simulation chamber and is connected to the two sets of heating resistance wires. The airflow control module includes a fan, a temperature heater, a valve, and a ventilation duct. The fan is located outside the simulation chamber. The air inlet of the ventilation duct is connected to the air outlet of the fan, and its outlet passes through an L-shaped baffle into the auxiliary tunnel space, and then bends before entering the main tunnel space. The temperature heater is fitted outside the air inlet section of the ventilation duct. The valve is connected in series in the air inlet section of the ventilation duct. The spray control module includes a water pump, a water supply pipeline, a second temperature heater, a flow controller, a primary spray assembly, a secondary spray assembly, and a tertiary spray assembly. The water pump is located outside the simulation chamber. The inlet of the water supply pipeline is connected to the outlet of the water pump, and its outlet passes through an L-shaped baffle into the auxiliary tunnel space, and then bends before entering the main tunnel space. The second temperature heater is installed outside the inlet section of the water supply pipeline. The flow controller is connected in series in the inlet section of the water supply pipeline. The primary, secondary, and tertiary spray assemblies are distributed sequentially from front to back at intervals on the top of the main tunnel space and are all connected to the water supply pipeline. The coal dust generating module includes a dust silo, a dust conveyor belt, a second fan, a dust conveying pipeline, a dust diffuser, and a housing. The dust silo is supported on the front side of the simulated housing, with a front discharge pipeline and a rear discharge pipeline connected side-by-side at its bottom. A second valve and a third valve are connected in series on the front and rear discharge pipelines, respectively. The feed section of the dust conveyor belt is located on the front side of the simulated housing, and its inlet is connected to the outlet of the front discharge pipeline. Its outlet section passes through a straight baffle into the main tunnel space and extends along one side of the main tunnel space into the auxiliary tunnel space, then exits the simulated housing from the left opening of the auxiliary tunnel space. The second fan is located on the front side of the simulated housing. The inlet of the feed section of the dust conveying pipeline is connected to the outlet of the rear discharge pipeline, and its inlet is connected to the outlet of the second fan. Its outlet end passes through the straight baffle and enters the front end of the main tunnel space; the dust diffuser is located in the main tunnel space and is installed at the outlet end of the dust conveying pipeline; the box is installed in the front space of the main tunnel space and is located behind the dust diffuser. The effect monitoring module includes a temperature sensor and a dust concentration sensor. Multiple temperature sensors and multiple dust concentration sensors are installed sequentially and at intervals from front to back in the main roadway space. The sewage discharge and sludge removal module includes a dust removal net, a sewage discharge box, and a drainage ditch. The dust removal net is sealed at the left opening end of the auxiliary roadway space and is fixedly connected to the simulated box. The sewage discharge box has an opening at the right end, and its right opening is fixedly connected to the left side of the left opening end of the auxiliary roadway space. The drainage ditch is L-shaped and is located at the bottom of the simulated roadway space. The longitudinal section of the drainage ditch extends along the left edge of the main roadway space, and its transverse section extends along the front edge of the auxiliary roadway space and extends into the sewage discharge box.

[0007] Furthermore, to facilitate fully automated control, a controller is also included; the controller is connected to a temperature sensor, a dust concentration sensor, a temperature controller, a fan, a temperature heater, a valve, a water pump, a temperature heater, a flow controller, a dust conveyor belt, a fan, a valve, a valve, a dust diffuser, and a dust removal screen.

[0008] As a preferred embodiment, the simulation chamber is made of copper; both the straight baffle and the L-shaped baffle are made of copper; the ventilation duct is made of rubber hose; and the heating medium is kerosene.

[0009] As a preferred option, both the first and second fans are small axial flow forced-in fans.

[0010] As a preferred embodiment, the dust hopper is funnel-shaped, and the dust diffuser includes a powder receiving shell and a motor; the powder receiving shell has a disc-shaped structure, and its inlet is rotatably fitted onto the outside of the outlet end of the dust conveying pipeline, and multiple dust outlet channels communicating with the inner cavity of the dust receiving shell are evenly opened in its circumference; the motor is located on the rear side of the end of the powder receiving shell, and its output shaft is fixedly connected to the center of the end of the powder receiving shell, and its base is connected to the dust conveying pipeline through a bracket.

[0011] As a preferred embodiment, there are three temperature sensors and three dust concentration sensors; the three temperature sensors are located between the housing and the first-stage spray assembly, between the first-stage spray assembly and the second-stage spray assembly, and between the second-stage spray assembly and the third-stage spray assembly, respectively; the distribution of the three dust concentration sensors is the same as that of the three temperature sensors.

[0012] Furthermore, in order to facilitate the perception of wastewater turbidity and quickly determine the dust cleaning effect, the effect monitoring module also includes a turbidity sensor, which is installed in the drainage ditch and connected to the controller.

[0013] In this invention, a T-shaped roadway simulation space is created in the middle of the simulation chamber, and straight baffles and L-shaped baffles are installed at the front and rear ends of the simulation chamber. This not only seals off the front and rear ends of the roadway simulation space but also facilitates the arrangement and maintenance of relevant experimental components within the main roadway space. Thus, the structure of a coal mine tunneling face can be effectively simulated inside the simulation chamber. Heating media are filled into the medium-carrying spaces on both sides of the main roadway space, and heating resistance wires are installed to facilitate heating of the media, thereby effectively changing the temperature inside the main roadway space. Therefore, the temperature environment of an actual tunneling roadway can be effectively simulated through the temperature control module. A ventilation duct connected to a blower is arranged through the L-shaped baffles in the main roadway space, facilitating the supply of airflow to the simulated tunneling face within the main roadway space. The valve allows for easy adjustment of the airflow rate during air supply. The temperature heater allows for easy adjustment of the airflow temperature, thus meeting different temperature supply conditions. Therefore, by setting up the airflow control module, airflow at different temperatures and volumes can be supplied, effectively simulating the airflow effect in actual tunneling. The water supply pipeline connected to the pumping unit is arranged in the main tunnel space through an L-shaped baffle, and sequentially connected to primary, secondary, and tertiary spray components from front to back. This facilitates the use of each spray component to perform spray cooling and dust suppression operations at different locations in the main tunnel space. Furthermore, by setting up three spray components, the spray volume of each stage can be different, thus facilitating the analysis of the cooling and dust suppression effects of each stage and enabling more efficient testing of the cooling and dust suppression effects of different spray schemes. The flow controller allows for convenient adjustment of the water flow rate, thereby regulating the spray volume. The temperature heater allows for easy adjustment of the water temperature, meeting the needs of different temperature water supply conditions. Therefore, by setting up the spray control module, the spray effect at different temperatures and flow rates can be simulated, effectively simulating the actual spray cooling and dust suppression operation conditions. By placing the housing within the main tunnel space, a tunneling machine can be simulated, thus mimicking its effect on obstructing airflow and dust dispersion. The dust chamber simultaneously supplies dust particles to both the dust conveying pipeline and the dust conveyor belt. The outlet of the dust conveying pipeline passes through a straight baffle to the front of the housing and connects to a dust diffuser. This allows for simultaneous dust distribution during supply, effectively mimicking the dust generated by the rotating cutting section of a modular tunneling machine. The dust conveyor belt passes through the straight baffle into the main tunnel space and exits from the left opening of the auxiliary tunnel space, effectively simulating a scraper conveyor. The inclusion of a second fan facilitates the airflow power for dust transport within the dust conveying pipeline.Therefore, by setting up a coal dust generation module, the working conditions of dust generation during tunneling face operations can be effectively simulated, and the amount of dust generated under different mining intensities can be simulated more accurately. The installation of temperature and dust concentration sensors facilitates real-time data collection of temperature and dust concentration in the main roadway at various times. This not only enables real-time monitoring of the spray cooling and dust suppression effect but also allows for further analysis of temperature and dust concentration variation patterns, facilitating the development of more scientific spray cooling and dust suppression technology solutions. The installation of a dust removal net facilitates dust removal through electrostatic principles, ensuring that the air discharged into the atmosphere is clean and does not cause environmental pollution. The installation of drainage ditches facilitates the collection of wastewater generated during the cleaning process and allows for centralized discharge into a sewage tank, facilitating subsequent centralized treatment operations. Therefore, by setting up the sewage discharge and sludge removal module, it is convenient to carry out cleaning operations on the simulated tunnel space after the simulation operation is completed, and to treat and collect the sewage and wastewater generated during the cleaning process, so that the experimental system can be reused multiple times.

[0014] The system has a simple structure and low manufacturing cost. It can fully simulate the spray cooling and dust suppression conditions of coal mine tunneling faces, and can intelligently change various environmental parameters and cooling and dust suppression schemes. It can obtain the cooling and dust suppression effects of different spray schemes, and can provide reliable technical support for the design of actual on-site spray cooling and dust suppression schemes.

[0015] This invention also provides an experimental method for simulating intelligent spray cooling and dust suppression in a coal mine tunneling face, employing an experimental system for simulating intelligent spray cooling and dust suppression in a coal mine tunneling face, comprising the following steps: Step 1: Control the temperature controller to connect the power supply and the heating resistance wire, and use the heating resistance wire to heat the heating medium to the set temperature range A, so that the temperature in the main tunnel space reaches the state of simulating the real environment. The control fan and temperature heater are started and operated, the control valve is opened, and airflow is supplied into the main roadway space through the ventilation duct. The temperature controller heats the supplied airflow to the set temperature range B. Meanwhile, multiple temperature sensors and multiple dust concentration sensors are used to collect temperature signals and dust concentration signals at different locations in the initial state, and send them to the controller. The controller obtains and records the initial state temperature data and dust concentration data based on the temperature signals and dust concentration signals. Step 2: Control the dust removal screen to start working, control the second fan, dust conveyor belt and dust diffuser to start working, and at the same time, control valves 2 and 3 to open, and use the front and rear feeding pipes to feed dust particles into the inlet of the dust conveyor belt and the inlet of the dust conveying pipe respectively. The dust conveyor belt is used to transport the dust particles along the simulated tunnel space, and the dust conveying pipe is used to transport the dust to the dust diffuser. The dust diffuser is used to disperse the dust particles to the front of the box to simulate the working conditions of dust generation during tunneling operations. At the same time, multiple temperature sensors, multiple dust concentration sensors, and temperature heater II are activated to control the flow controller to open and supply pressurized water to the main tunnel space through the water supply pipeline. Temperature heater II heats the supplied water to the set temperature range C. Meanwhile, the primary spray assembly, secondary spray assembly, and tertiary spray assembly carry out spray cooling and dust suppression operations at different locations. Meanwhile, multiple temperature sensors and multiple dust concentration sensors were used to change the spray state, and the cooling and dust reduction effects under different spray states were obtained and recorded. Step 4: After the spray cooling and dust suppression operation is completed, control the fan 2, dust conveyor belt and dust diffuser to stop, and at the same time, control valve 2 and valve 3 to close; Step 5: Control valve 1 to its maximum opening, and use the supplied airflow to clean the unsettled dust in the main roadway. At the same time, use the electrostatic effect of the dust removal screen to filter the airflow entering the sewage box to effectively remove the dust carried in the airflow. At the same time, the flow controller is adjusted to maximize the spray volume of each spray component to clean the dust deposited in the main tunnel space, and the wastewater generated is collected by the drainage ditch and then discharged into the sewage tank. Meanwhile, multiple dust concentration sensors are used to collect turbidity signals in the drainage ditch, and the dust concentration signals and turbidity signals are sent to the controller. The controller obtains dust concentration data and turbidity data based on the dust concentration signals and turbidity signals, respectively. When the dust concentration data at different locations are all lower than the set safety threshold A, control fan one and temperature heater one to stop and control valve one to close; when the turbidity data is lower than the set safety threshold B, control water device and temperature heater two to stop and control flow controller to close.

[0016] As a preferred option, in step one, the air volume of the supplied airflow is adjusted by regulating the opening degree of valve one.

[0017] As a preferred embodiment, in step two, the amount of dust added to the dust conveyor belt and dust conveying pipeline is controlled by adjusting the opening of valves two and three.

[0018] This invention provides an experimental method for simulating intelligent spray cooling and dust suppression in a coal mine tunneling face. First, the temperature control module and airflow regulation module are activated to set the initial environment. During this process, the temperature control module controls the temperature conditions in the main roadway space, and during the introduction of airflow, a temperature heater simultaneously changes the airflow temperature, fully considering the impact of ventilation on the temperature in the main roadway space. Next, the dust generation module is activated to simulate dust generation conditions. Subsequently, the spray regulation module is activated to perform spray cooling and dust suppression operations, thus introducing the influence of water on dust. The effect of spraying for water and dust suppression is obtained through an effect monitoring module. Finally, the sewage and sludge removal module cleans up sewage and polluted air. The experiment can be repeated multiple times using the same experimental system. Simultaneously, during the experiment, the airflow and temperature, waterflow and temperature, and dust volume can be conveniently adjusted by controlling the opening degree of different valves, the set temperature of the temperature heater, and the flow rate of the flow controller. This allows for obtaining the cooling and dust suppression effects of different spray schemes, thus facilitating the development of more scientific spray schemes for on-site cooling and dust suppression.

[0019] This invention uses a temperature control module to simulate different tunnel temperature conditions, an airflow control module and a spray control module to simulate the temperature and flow rate of air supply and spray, a dust generation module to simulate the amount of dust generated at different mining intensities, an effect monitoring module to monitor the cooling and dust reduction effect of the spray, and a sewage and sludge removal module to clean up sewage and polluted air in the main tunnel. This allows for repeated experiments using the same system. During experiments, by adjusting the valves, flow controllers, and temperature heaters of different modules, different temperatures, dust levels, air volumes, and spray volumes at the tunneling face can be simulated, and the cooling and dust reduction effects of different spray schemes can be obtained to guide the scientific development of on-site spray plans. The main advantages compared to existing technologies are: 1) Through the temperature control module and the airflow regulation module, the three factors of roadway temperature, airflow temperature and airflow rate are adjusted, which can simulate different conditions, making the simulation range of the device wider and the simulation effect closer to the actual site.

[0020] 2) Three-stage spray components were designed at different locations from the dust source at the tunneling working face. The temperature and flow rate of the spray were controlled by a temperature heater and a flow controller. This enabled the simulation of multiple spray schemes to find the most economical spray cooling and dust suppression implementation scheme more quickly.

[0021] 3) By arranging temperature and dust concentration sensors, it is easy to obtain temperature and dust concentration data after spraying through each level of spray components. By comparing the data, the cooling and dust reduction effects of different spray schemes can be obtained, which can then guide the design process of spray schemes more scientifically.

[0022] This method has a simple simulation process, a high degree of intelligence, and ideal simulation effect. It can efficiently and accurately obtain the cooling and dust suppression effects of different spray schemes, which can help to formulate more scientific spray schemes for on-site cooling and dust suppression. Attached Figure Description

[0023] Figure 1 This is a three-dimensional structural schematic diagram of the present invention; Figure 2 yes Figure 1 Top view; Figure 3 This is a schematic diagram of the assembly of the dust diffuser and the dust conveying pipeline in this invention; Figure 4 yes Figure 3 The main view.

[0024] In the diagram: 1. Simulation chamber; 2. Main tunnel space; 3. Auxiliary tunnel space; 4. Medium carrying space; 5. Heating medium; 6. Heating resistance wire; 7. Temperature controller; 8. Straight baffle; 9. L-shaped baffle; 10. Fan 1; 11. Temperature heater 1; 12. Valve 1; 13. Ventilation duct; 14. Water pump device; 15. Water supply duct; 16. Temperature heater 2; 17. Flow controller; 18. Primary spray duct; 19. Secondary spray. Components, 20. Three-stage spray assembly, 21. Dust bin, 22. Front discharge pipe, 23. Rear discharge pipe, 24. Dust conveying pipe, 25. Dust conveyor belt, 26. Fan II, 27. Dust diffuser, 28. Box, 29. Temperature sensor, 30. Dust concentration sensor, 31. Dust removal net, 32. Sewage box, 33. Drainage ditch, 34. Powder container shell, 35. Motor, 36. Dust outlet channel, 37. Turbidity sensor. Detailed Implementation

[0025] The invention will now be further described with reference to the accompanying drawings.

[0026] like Figures 1 to 4 As shown, the present invention provides an experimental system for simulating intelligent spray cooling and dust suppression in a coal mine tunneling face, including a roadway simulation component, a temperature control module, an airflow control module, a spray control module, a coal dust generation module, an effect monitoring module, and a sewage discharge and sludge removal module; The tunnel simulation component includes a simulation box 1, a straight baffle 8, and an L-shaped baffle 9. The central area of ​​the simulation box 1 has a T-shaped tunnel simulation space, which includes a longitudinally distributed main tunnel space 2 and a laterally distributed auxiliary tunnel space 3. The front end of the main tunnel space 2 extends to the front end of the simulation box 1, and the middle section of the auxiliary tunnel space 3 connects to the rear end of the main tunnel space 2. Its left and right ends and rear end extend to the left and right ends and rear end of the simulation box 1, respectively. The straight baffle 8 is fixedly installed at the front end of the simulation box 1 and blocks the front end of the main tunnel space 2. The L-shaped baffle 9 is fixedly installed at the rear end of the simulation box 1 and blocks the rear end and right end of the auxiliary tunnel space 3. The simulation box 1 has media-carrying spaces 4 on both sides of the main tunnel space 2. The temperature control module includes a heating medium 5, heating resistance wires 6, and a temperature controller 7. The heating medium 5 is filled in the medium carrying space 4. Two sets of heating resistance wires 6 are respectively arranged in the medium carrying space 4. The temperature controller 7 is located on the outside of the simulation chamber 1 and is connected to the two sets of heating resistance wires 6. The temperature controller 7 can automatically control the start and stop of the heating resistance wires 6 according to the set temperature, which ensures both heating power and effectively ensures that the temperature of the heating medium 5 is always within the set temperature range. The airflow control module includes a fan 10, a temperature heater 11, a valve 12, and a ventilation duct 13. The fan 10 is located outside the simulation chamber 1. The air inlet of the ventilation duct 13 is connected to the air outlet of the fan 10, and its air outlet passes through the L-shaped baffle 9 into the auxiliary tunnel space 3, and then enters the main tunnel space 2 after bending. The temperature heater 11 is fitted outside the air inlet section of the ventilation duct 13. The valve 12 is connected in series in the air inlet section of the ventilation duct 13. The spray control module includes a water pump 14, a water supply pipeline 15, a second temperature heater 16, a flow controller 17, a primary spray assembly 18, a secondary spray assembly 19, and a tertiary spray assembly 20. The water pump 14 is located outside the simulation chamber 1 and is used to provide water for spraying. The inlet end of the water supply pipeline 15 is connected to the outlet end of the water pump 14, and its outlet end passes through the L-shaped baffle 9 into the auxiliary tunnel space 3, and then enters the main tunnel space 2 after a bend. The second temperature heater 16 is fitted outside the inlet section of the water supply pipeline 15, which facilitates the control of the supplied water flow. Temperature can be easily adjusted; the flow controller 17 is connected in series in the inlet section of the water supply pipeline 15 to adjust the spray volume; the first-stage spray assembly 18, the second-stage spray assembly 19 and the third-stage spray assembly 20 are distributed sequentially from front to back at intervals on the top of the main tunnel space 2 and are all connected to the water supply pipeline 14; as a preferred embodiment, each spray assembly consists of a water supply branch and multiple nozzles, wherein the inlet end of the water supply branch is connected to the reserved outlet interface on the water supply pipeline 15, and multiple nozzles are sequentially installed on multiple reserved spray interfaces on the water supply branch along the length direction of the water supply branch.

[0027] As a further preferred embodiment, the primary spray assembly 18 is located at a predetermined distance in front of the housing 28, the secondary spray assembly 19 is located at a predetermined distance behind the housing 28, and the tertiary spray assembly 20 is located at a predetermined distance behind the secondary spray assembly 19. Each spray assembly simulates the conditions of reducing the temperature and dust concentration at the tunneling face through spraying.

[0028] The coal dust generating module includes a dust bin 21, a dust conveyor belt 25, a second fan 26, a dust conveying pipeline 24, a dust diffuser 27, and a housing 28. The dust bin 21 is supported on the front side of the front end of the simulation housing 1, and its bottom is connected side by side to a front discharge pipeline 22 and a rear discharge pipeline 23. Valves 2 and 3 are connected in series on the front discharge pipeline 22 and the rear discharge pipeline 23, respectively, which can facilitate convenient adjustment of the discharge amount. The feeding section of the dust conveyor belt 25 is located in the simulation housing. The front side of the front end of the housing 1, with the inlet connected to the outlet of the front feeding pipe 22, has its outlet section passing through the straight baffle 8 into the main tunnel space 2, extending along one side of the main tunnel space 2 into the auxiliary tunnel space 3, and then exiting the simulated housing 1 through the left opening of the auxiliary tunnel space 3; the second fan 26 is located on the front side of the front end of the simulated housing 1; the inlet of the dust conveying pipe 24 is connected to the outlet of the rear feeding pipe 23, and the inlet of its inlet section is connected to the outlet of the second fan 26. Its outlet end passes through the straight baffle 8 and enters the front end of the main roadway space 2; the dust diffuser 27 is located in the main roadway space 2 and is installed at the outlet end of the dust conveying pipeline 24; the box 28 is installed in the front space of the main roadway space 2 and is located behind the dust diffuser 27. As a preferred option, the box 28 is made of iron to simulate the blocking effect of a real tunneling machine on the airflow and dust diffusion in the roadway. The effect monitoring module includes a temperature sensor 29 and a dust concentration sensor 30. Multiple temperature sensors 29 and multiple dust concentration sensors 30 are installed sequentially and at intervals from front to back in the main roadway space 2. The sewage discharge and sludge removal module includes a dust removal net 31, a sewage discharge box 32, and a drainage ditch 33. The dust removal net 31 is sealed at the left opening end of the auxiliary tunnel space 3 and is fixedly connected to the simulated box 1. Preferably, the dust removal net 31 adopts an electrostatic dust removal method. The sewage discharge box 32 has an opening at its right end, and its right opening is fixedly connected to the left side of the left opening end of the auxiliary tunnel space 3 for collecting discharged wastewater and exhaust gas. The drainage ditch 33 is L-shaped and is located at the bottom of the tunnel simulated space. The longitudinal section of the drainage ditch 33 extends along the left end edge of the main tunnel space 2, and its transverse section extends along the front end edge of the auxiliary tunnel space 3 and extends into the sewage discharge box 32.

[0029] To facilitate fully automated control, a controller is also included. Preferably, the controller is a PLC controller. The controller is connected to the temperature sensor 29, dust concentration sensor 30, temperature controller 7, fan 10, temperature heater 11, valve 12, water pump 14, temperature heater 16, flow controller 17, dust conveyor belt 25, fan 26, valve 2, valve 3, dust diffuser 27, and dust removal screen 31.

[0030] As a preferred embodiment, the simulation chamber 1 is made of copper, which ensures that the temperature of the heating medium in the medium-carrying space can be quickly conducted to the main roadway space, thereby quickly simulating the temperature environment of the tunnel and ensuring the heat conduction effect of the simulation chamber. The straight baffle 8 and the L-shaped baffle 9 are both made of copper, which ensures the constant temperature of the simulated roadway space. The ventilation duct 13 is made of rubber hose to effectively simulate a flexible ventilation duct. The heating medium 5 is kerosene, which does not react chemically with copper, ensuring a more uniform heating process.

[0031] As a preferred embodiment, both the first fan 10 and the second fan 26 are small axial flow pressure fans.

[0032] As a preferred embodiment, the dust chamber 21 is funnel-shaped and filled with sufficient dust particles; the dust diffuser 27 includes a powder receiving shell 34 and a motor 35; the powder receiving shell 34 has a disc-shaped structure, with its inlet rotatably fitted onto the outside of the outlet end of the dust conveying pipeline 24, and multiple dust outlet channels 36 are evenly opened in its circumference, communicating with the inner cavity of the dust receiving shell 34. As a preferred embodiment, the number of dust outlet channels 36 is 8, used to discharge dust; the motor 35 is located on the rear side of the end of the powder receiving shell 34, and its output shaft is fixedly connected to the center of the end of the powder receiving shell 34. Its base is connected to the dust conveying pipeline 23 through a bracket. In this way, the motor 35 can drive the dust receiving shell 34 to perform adjustment and rotation, and can rotate the incoming dust particles to the front space of the box 28 to effectively simulate the dust conditions generated by the rotating cutting of rock by the cutting part of the tunneling machine.

[0033] As a preferred embodiment, there are three temperature sensors 29 and three dust concentration sensors 30; the three temperature sensors 29 are respectively located between the housing 28 and the first-stage spray assembly 18, between the first-stage spray assembly 18 and the second-stage spray assembly 19, and between the second-stage spray assembly 19 and the third-stage spray assembly 20; the distribution positions of the three dust concentration sensors 30 are the same as the distribution positions of the three temperature sensors 29.

[0034] In order to facilitate the detection of wastewater turbidity and quickly determine the dust cleaning effect, the effect monitoring module also includes a turbidity sensor 37, which is installed in the drainage ditch 33 and connected to the controller.

[0035] In this invention, a T-shaped roadway simulation space is created in the middle of the simulation chamber, and straight baffles and L-shaped baffles are installed at the front and rear ends of the simulation chamber. This not only seals off the front and rear ends of the roadway simulation space but also facilitates the arrangement and maintenance of relevant experimental components within the main roadway space. Thus, the structure of a coal mine tunneling face can be effectively simulated inside the simulation chamber. Heating media are filled into the medium-carrying spaces on both sides of the main roadway space, and heating resistance wires are installed to facilitate heating of the media, thereby effectively changing the temperature inside the main roadway space. Therefore, the temperature environment of an actual tunneling roadway can be effectively simulated through the temperature control module. A ventilation duct connected to a blower is arranged through the L-shaped baffles in the main roadway space, facilitating the supply of airflow to the simulated tunneling face within the main roadway space. The valve allows for easy adjustment of the airflow rate during air supply. The temperature heater allows for easy adjustment of the airflow temperature, thus meeting different temperature supply conditions. Therefore, by setting up the airflow control module, airflow at different temperatures and volumes can be supplied, effectively simulating the airflow effect in actual tunneling. The water supply pipeline connected to the pumping unit is arranged in the main tunnel space through an L-shaped baffle, and sequentially connected to primary, secondary, and tertiary spray components from front to back. This facilitates the use of each spray component to perform spray cooling and dust suppression operations at different locations in the main tunnel space. Furthermore, by setting up three spray components, the spray volume of each stage can be different, thus facilitating the analysis of the cooling and dust suppression effects of each stage and enabling more efficient testing of the cooling and dust suppression effects of different spray schemes. The flow controller allows for convenient adjustment of the water flow rate, thereby regulating the spray volume. The temperature heater allows for easy adjustment of the water temperature, meeting the needs of different temperature water supply conditions. Therefore, by setting up the spray control module, the spray effect at different temperatures and flow rates can be simulated, effectively simulating the actual spray cooling and dust suppression operation conditions. By placing the housing within the main tunnel space, a tunneling machine can be simulated, thus mimicking its effect on obstructing airflow and dust dispersion. The dust chamber simultaneously supplies dust particles to both the dust conveying pipeline and the dust conveyor belt. The outlet of the dust conveying pipeline passes through a straight baffle to the front of the housing and connects to a dust diffuser. This allows for simultaneous dust distribution during supply, effectively mimicking the dust generated by the rotating cutting section of a modular tunneling machine. The dust conveyor belt passes through the straight baffle into the main tunnel space and exits from the left opening of the auxiliary tunnel space, effectively simulating a scraper conveyor. The inclusion of a second fan facilitates the airflow power for dust transport within the dust conveying pipeline.Therefore, by setting up a coal dust generation module, the working conditions of dust generation during tunneling face operations can be effectively simulated, and the amount of dust generated under different mining intensities can be simulated more accurately. The installation of temperature and dust concentration sensors facilitates real-time data collection of temperature and dust concentration in the main roadway at various times. This not only enables real-time monitoring of the spray cooling and dust suppression effect but also allows for further analysis of temperature and dust concentration variation patterns, facilitating the development of more scientific spray cooling and dust suppression technology solutions. The installation of a dust removal net facilitates dust removal through electrostatic principles, ensuring that the air discharged into the atmosphere is clean and does not cause environmental pollution. The installation of drainage ditches facilitates the collection of wastewater generated during the cleaning process and allows for centralized discharge into a sewage tank, facilitating subsequent centralized treatment operations. Therefore, by setting up the sewage discharge and sludge removal module, it is convenient to carry out cleaning operations on the simulated tunnel space after the simulation operation is completed, and to treat and collect the sewage and wastewater generated during the cleaning process, so that the experimental system can be reused multiple times.

[0036] The system has a simple structure and low manufacturing cost. It can fully simulate the spray cooling and dust suppression conditions of coal mine tunneling faces, and can intelligently change various environmental parameters and cooling and dust suppression schemes. It can obtain the cooling and dust suppression effects of different spray schemes, and can provide reliable technical support for the design of actual on-site spray cooling and dust suppression schemes.

[0037] This invention also provides an experimental method for simulating intelligent spray cooling and dust suppression in a coal mine tunneling face, employing an experimental system for simulating intelligent spray cooling and dust suppression in a coal mine tunneling face, comprising the following steps: Step 1: Control the temperature controller 7 to connect the power supply and the heating resistance wire 6, and use the heating resistance wire 6 to heat the heating medium 5 to the set temperature range A, so that the temperature in the main tunnel space 2 reaches and stabilizes in the state of simulating the real environment. The control fan 10 and temperature heater 11 are started and started, the control valve 12 is opened, and the ventilation pipe 13 is used to supply air into the main roadway space 2. The temperature controller 11 is used to heat the supplied air to the set temperature range B. Preferably, the air volume of the supplied airflow can be adjusted by adjusting the opening of valve 12, thereby increasing the temperature and volume of the airflow injected into the tunneling face to a state that simulates the real environment. Meanwhile, multiple temperature sensors 29 and multiple dust concentration sensors 30 are used to collect temperature signals and dust concentration signals at different locations in the initial state, and send them to the controller. The controller obtains the initial state temperature data and dust concentration data based on the temperature signals and dust concentration signals and records them. In this way, the calibration of the initial temperature and dust concentration is completed. Step 2: Control the dust removal net 31 to start working, control the second fan 26, dust conveyor belt 25 and dust diffuser 27 to start working, and control valves 2 and 3 to open, respectively using the front feeding pipe 22 and the rear feeding pipe 23 to transport dust particles to the inlet of the dust conveyor belt 25 and the inlet of the dust conveying pipe 24, respectively. The dust conveyor belt 25 is used to transport the dust particles along the simulated space of the tunnel, and the dust conveying pipe 24 is used to transport the dust to the dust diffuser 27. The dust diffuser 27 is used to disperse the dust particles to the front of the box 28 to simulate the working conditions of dust generation during tunneling operations. As a preferred option, the amount of dust injected into the dust conveyor belt 25 and the dust conveying pipeline 24 is controlled by adjusting the opening of valves two and three, thereby simulating different mining intensities; Meanwhile, multiple temperature sensors 29 and multiple dust concentration sensors 30 are used to collect temperature signals and dust concentration signals at different locations during the tunneling simulation, and send them to the controller. The controller obtains temperature data and dust concentration data under the uncooled and dust-suppressed state based on the temperature signals and dust concentration signals, and obtains the dust settling law under the uncooled and dust-suppressed state based on the changes in dust concentration data. Step 3: Start the pumping device 14 and the second temperature heater 16, open the flow controller 17, and supply pressurized water to the main tunnel space 2 through the water supply pipeline 15. Heat the supplied water to the set temperature range C through the second temperature heater 16 to adjust the temperature of the delivered water to the preset state. At the same time, spray cooling and dust suppression operations are carried out at different locations through the first-stage spray assembly 18, the second-stage spray assembly 19 and the third-stage spray assembly 20. Meanwhile, multiple temperature sensors 29 and multiple dust concentration sensors 30 are used to collect temperature signals and dust concentration signals at different locations during the cooling and dust reduction process, and send them to the controller. The controller obtains temperature data and dust concentration data during the cooling and dust reduction process based on the temperature signals and dust concentration signals. At the same time, the spray state is changed by adjusting the flow controller 17 to obtain and record the cooling and dust reduction effect under different spray states. Step 4: After the spray cooling and dust suppression operation is completed, control the fan 26, dust conveyor belt 25 and dust diffuser 27 to stop, and at the same time, control valves 2 and 3 to close. Step 5: Control valve 12 to its maximum opening, and use the supplied airflow to clean the unsettled dust in the main roadway space 2. At the same time, use the electrostatic effect on the dust removal screen 31 to filter the airflow entering the sewage box 32 to effectively remove the dust carried in the airflow. At the same time, the flow controller 7 is adjusted to maximize the spray volume of each spray component to clean the dust deposited in the main tunnel space 2, and the wastewater generated is collected by the drainage ditch 33 and then discharged into the sewage tank 32. Meanwhile, multiple dust concentration sensors 30 are used to collect dust concentration signals at different locations, and turbidity sensor 37 is used to collect turbidity signals in drainage ditch 33. The dust concentration signal and turbidity signal are sent to the controller, and the controller obtains dust concentration data and turbidity data based on the dust concentration signal and turbidity signal, respectively. When the dust concentration data at different locations are all lower than the set safety threshold A, control fan 10 and temperature heater 11 to stop and control valve 12 to close; when the turbidity data is lower than the set safety threshold B, control water device 14 and temperature heater 16 to stop and control flow controller 17 to close.

[0038] This invention provides an experimental method for simulating intelligent spray cooling and dust suppression in a coal mine tunneling face. First, the temperature control module and airflow regulation module are activated to set the initial environment. During this process, the temperature control module controls the temperature conditions in the main roadway space, and during the introduction of airflow, a temperature heater simultaneously changes the airflow temperature, fully considering the impact of ventilation on the temperature in the main roadway space. Next, the dust generation module is activated to simulate dust generation conditions. Subsequently, the spray regulation module is activated to perform spray cooling and dust suppression operations, thus introducing the influence of water on dust. The effect of spraying for water and dust suppression is obtained through an effect monitoring module. Finally, the sewage and sludge removal module cleans up sewage and polluted air. The experiment can be repeated multiple times using the same experimental system. Simultaneously, during the experiment, the airflow and temperature, waterflow and temperature, and dust volume can be conveniently adjusted by controlling the opening degree of different valves, the set temperature of the temperature heater, and the flow rate of the flow controller. This allows for obtaining the cooling and dust suppression effects of different spray schemes, thus facilitating the development of more scientific spray schemes for on-site cooling and dust suppression.

[0039] This method has a simple simulation process, a high degree of intelligence, and ideal simulation effect. It can efficiently and accurately obtain the cooling and dust suppression effects of different spray schemes, which can help to formulate more scientific spray schemes for on-site cooling and dust suppression.

Claims

1. An experimental system for simulating intelligent spray cooling and dust suppression in a coal mine tunneling face, comprising a roadway simulation component, characterized in that, It also includes a temperature control module, an airflow control module, a spray control module, a coal dust generation module, an effect monitoring module, and a sewage discharge and dredging module; The tunnel simulation component includes a simulation box (1), a straight baffle (8), and an L-shaped baffle (9). The central area of ​​the simulation box (1) is provided with a T-shaped tunnel simulation space, which includes a longitudinally distributed main tunnel space (2) and a transversely distributed auxiliary tunnel space (3). The front end of the main tunnel space (2) extends to the front end of the simulation box (1), and the middle section of the auxiliary tunnel space (3) is connected to the rear end of the main tunnel space (2). Its left and right ends and rear end extend to the left and right ends and rear end of the simulation box (1), respectively. The straight baffle (8) is fixedly installed at the front end of the simulation box (1) and blocks the front end of the main tunnel space (2). The L-shaped baffle (9) is fixedly installed at the rear end of the simulation box (1) and blocks the rear end and right end of the auxiliary tunnel space (3). The simulation box (1) is provided with a medium carrying space (4) on both sides of the main tunnel space (2). The temperature control module includes a heating medium (5), heating resistance wires (6) and a temperature controller (7). The heating medium (5) is filled in the medium carrying space (4). Two sets of heating resistance wires (6) are respectively arranged in the medium carrying space (4). The temperature controller (7) is located on the outside of the simulation box (1) and is connected to the two sets of heating resistance wires (6). The airflow control module includes a fan (10), a temperature heater (11), a valve (12), and a ventilation duct (13); the fan (10) is located outside the simulation box (1); the air inlet of the ventilation duct (13) is connected to the air outlet of the fan (10), and its air outlet passes through the L-shaped baffle (9) into the auxiliary roadway space (3), and after bending, enters the main roadway space (2); the temperature heater (11) is fitted outside the air inlet section of the ventilation duct (13); the valve (12) is connected in series in the air inlet section of the ventilation duct (13); The spray control module includes a water pump (14), a water supply pipeline (15), a second temperature heater (16), a flow controller (17), a first-stage spray assembly (18), a second-stage spray assembly (19), and a third-stage spray assembly (20). The water pump (14) is located outside the simulation box (1). The inlet end of the water supply pipeline (15) is connected to the outlet end of the water pump (14), and its outlet end passes through the L-shaped baffle (9) into the auxiliary tunnel space (3), and after bending, enters the main tunnel space (2). The second temperature heater (16) is fitted outside the inlet section of the water supply pipeline (15). The flow controller (17) is connected in series in the inlet section of the water supply pipeline (15). The first-stage spray assembly (18), the second-stage spray assembly (19), and the third-stage spray assembly (20) are distributed sequentially from front to back at the top of the main tunnel space (2), and are all connected to the water supply pipeline (14). The coal dust generating module includes a dust bin (21), a dust conveyor belt (25), a second fan (26), a dust conveying pipeline (24), a dust diffuser (27), and a housing (28). The dust bin (21) is supported on the front side of the front end of the simulated housing (1), and its bottom is connected side by side to a front discharge pipeline (22) and a rear discharge pipeline (23), with valves two and three connected in series on the front discharge pipeline (22) and the rear discharge pipeline (23), respectively. The feeding section of the dust conveyor belt (25) is located on the front side of the front end of the simulated housing (1), and... The feed inlet is connected to the discharge end of the front feed pipe (22), and its discharge section passes through the straight baffle (8) into the main tunnel space (2), and extends along one side of the main tunnel space (2) to the auxiliary tunnel space (3), and then exits the simulation box (1) from the left opening end of the auxiliary tunnel space (3); the second fan (26) is located on the front side of the front end of the simulation box (1); the feed inlet on the feed section of the dust conveying pipe (24) is connected to the discharge end of the rear feed pipe (23), and the inlet end on its feed section is connected to the outlet end of the second fan (26). Its outlet end passes through the straight baffle (8) and enters the front end of the main tunnel space (2); the dust diffuser (27) is located in the main tunnel space (2) and is installed at the outlet end of the dust conveying pipeline (24); the box (28) is installed in the front space of the main tunnel space (2) and is located behind the dust diffuser (27); The effect monitoring module includes a temperature sensor (29) and a dust concentration sensor (30). Multiple temperature sensors (29) and multiple dust concentration sensors (30) are installed in the main roadway space (2) from front to back at intervals. The sewage discharge and sludge removal module includes a dust removal net (31), a sewage discharge box (32), and a drainage ditch (33); the dust removal net (31) is sealed at the left opening end of the auxiliary roadway space (3) and is fixedly connected to the simulated box (1); the sewage discharge box (32) has an opening at the right end, and its right opening is fixedly connected to the left side of the left opening end of the auxiliary roadway space (3); the drainage ditch (33) is L-shaped and is located at the bottom of the simulated roadway space. The longitudinal section of the drainage ditch (33) extends along the left end edge of the main roadway space (2), and its transverse section extends along the front end edge of the auxiliary roadway space (3) and extends into the sewage discharge box (32).

2. The experimental system for intelligent spray cooling and dust suppression in a simulated coal mine tunneling face according to claim 1, characterized in that, It also includes a controller; the controller is connected to a temperature sensor (29), a dust concentration sensor (30), a temperature controller (7), a fan (10), a temperature heater (11), a valve (12), a water pump (14), a temperature heater (16), a flow controller (17), a dust conveyor belt (25), a fan (26), a valve, a valve, a dust diffuser (27), and a dust removal net (31).

3. The experimental system for simulating intelligent spray cooling and dust suppression in a coal mine tunneling face according to claim 2, characterized in that, The simulation chamber (1) is made of copper; the straight baffle (8) and the L-shaped baffle (9) are both made of copper; the ventilation pipe (13) is made of rubber hose; and the heating medium (5) is kerosene.

4. The experimental system for intelligent spray cooling and dust suppression in a simulated coal mine tunneling face according to claim 3, characterized in that, Both the first fan (10) and the second fan (26) are small axial flow forced-in fans.

5. The experimental system for simulating intelligent spray cooling and dust suppression in a coal mine tunneling face according to claim 4, characterized in that, The dust hopper (21) is funnel-shaped, and the dust diffuser (27) includes a powder receiving shell (34) and a motor (35). The powder receiving shell (34) has a disc-shaped structure, and its inlet is rotatably fitted outside the outlet end of the dust conveying pipeline (24). Multiple dust outlet channels (36) are evenly opened in the circumference and communicate with the inner cavity of the dust receiving shell (34). The motor (35) is located on the rear side of the end of the powder receiving shell (34), and its output shaft is fixedly connected to the center of the end of the powder receiving shell (34). Its base is connected to the dust conveying pipeline (23) through a bracket.

6. The experimental system for intelligent spray cooling and dust suppression in a simulated coal mine tunneling face according to claim 5, characterized in that, The number of temperature sensors (29) and dust concentration sensors (30) is three each; the three temperature sensors (29) are located between the housing (28) and the first-level spray assembly (18), between the first-level spray assembly (18) and the second-level spray assembly (19), and between the second-level spray assembly (19) and the third-level spray assembly (20), respectively; the distribution of the three dust concentration sensors (30) is the same as that of the three temperature sensors (29).

7. The experimental system for simulating intelligent spray cooling and dust suppression in a coal mine tunneling face according to claim 6, characterized in that, The effect monitoring module also includes a turbidity sensor (37), which is installed in the drainage ditch (33) and connected to the controller.

8. An experimental method for simulating intelligent spray cooling and dust suppression in a coal mine tunneling face, comprising an experimental system for simulating intelligent spray cooling and dust suppression in a coal mine tunneling face as described in any one of claims 1 to 7, characterized in that, Includes the following steps: Step 1: Control the temperature controller (7) to connect the power supply and the heating resistance wire (6), and use the heating resistance wire (6) to heat the heating medium (5) to the set temperature range A, so that the temperature in the main tunnel space (2) reaches the state of simulating the real environment; The control fan (10) and temperature heater (11) are started and started, the control valve (12) is opened, and the ventilation pipe (13) is used to supply air into the main roadway space (2), and the temperature controller (11) is used to heat the supplied air to the set temperature range B. Meanwhile, multiple temperature sensors (29) and multiple dust concentration sensors (30) are used to collect temperature signals and dust concentration signals at different locations in the initial state, and send them to the controller. The controller obtains the initial state temperature data and dust concentration data based on the temperature signals and dust concentration signals and records them. Step 2: Control the dust removal net (31) to start working, control the second fan (26), dust conveyor belt (25) and dust diffuser (27) to start working, and at the same time, control valves 2 and 3 to open, and use the front feeding pipe (22) and the rear feeding pipe (23) to transport dust particles to the inlet of the dust conveyor belt (25) and the inlet of the dust conveying pipe (24) respectively. The dust conveyor belt (25) is used to transport the dust particles along the simulated space of the tunnel, and the dust conveying pipe (24) is used to transport the dust to the dust diffuser (27). The dust diffuser (27) is used to disperse the dust particles to the front side of the box (28) to simulate the working conditions of dust generation during the tunneling operation. Meanwhile, multiple temperature sensors (29) and multiple dust concentration sensors (30) are used to collect temperature signals and dust concentration signals at different locations during the tunneling simulation process, and send them to the controller. The controller obtains temperature data and dust concentration data under the condition of no cooling and dust reduction based on the temperature signal and dust concentration signal, and obtains the dust settling law based on the change of dust concentration data. Step 3: Start the pumping device (14) and the second temperature heater (16) and open the flow controller (17). Use the water supply pipeline (15) to supply pressurized water to the main roadway space (2) and use the second temperature heater (16) to heat the supplied water to the set temperature range C. At the same time, spray cooling and dust suppression operations are carried out at different locations through the first-level spray assembly (18), the second-level spray assembly (19) and the third-level spray assembly (20). Meanwhile, multiple temperature sensors (29) and multiple dust concentration sensors (30) are used to collect temperature signals and dust concentration signals at different locations during the cooling and dust reduction process, and send them to the controller. The controller obtains temperature data and dust concentration data during the cooling and dust reduction process based on the temperature signal and dust concentration signal. At the same time, the spray state is changed by adjusting the flow controller (17) to obtain and record the cooling and dust reduction effect under different spray states. Step 4: After the spray cooling and dust suppression operation is completed, control the second fan (26), dust conveyor belt (25) and dust diffuser (27) to stop, and at the same time, control valves 2 and 3 to close. Step 5: Control valve 1 (12) to reach its maximum opening, and use the supplied airflow to clean the unsettled dust in the main roadway space (2). At the same time, use the electrostatic effect on the dust removal net (31) to filter the airflow entering the sewage box (32) to effectively remove the dust carried in the airflow. At the same time, the flow controller (7) is adjusted to maximize the spray volume of each spray component, clean the dust deposited in the main roadway space (2), and collect the generated sewage through the drainage ditch (33) and discharge it into the sewage tank (32). Meanwhile, multiple dust concentration sensors (30) are used to collect dust concentration signals at different locations, and turbidity sensors (37) are used to collect turbidity signals in the drainage ditch (33). The dust concentration signal and turbidity signal are sent to the controller, and the controller obtains dust concentration data and turbidity data based on the dust concentration signal and turbidity signal respectively. When the dust concentration data at different locations are all lower than the set safety threshold A, control the fan 1 (10) and temperature heater 1 (11) to stop and control valve 1 (12) to close; when the turbidity data is lower than the set safety threshold B, control the water device (14) and temperature heater 2 (16) to stop and control the flow controller (17) to close.

9. The experimental method for simulating intelligent spray cooling and dust suppression in a coal mine tunneling face according to claim 8, characterized in that, In step one, the air volume of the supplied airflow is adjusted by adjusting the opening of valve one (12).

10. The experimental method for simulating intelligent spray cooling and dust suppression in a coal mine tunneling face according to claim 9, characterized in that, In step two, the amount of dust added to the dust conveyor belt (25) and the dust conveying pipeline (24) is controlled by adjusting the opening of valves two and three.

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