Mine local ventilation and cooling system method based on liquid air

Abstract

The invention discloses a mine local ventilation and cooling system and method based on liquid air, and relates to the technical field of mine environment control, and the mine local ventilation and cooling system comprises an intelligent conveying pipeline, an intelligent multi-mode release device, an air purification and energy recovery device and a mine environment self-adaptive monitoring and control system; the intelligent conveying pipeline comprises a multi-layer composite heat insulation structure and an intelligent control module, and the intelligent control module comprises a temperature sensor, a pressure sensor and a flow sensor and is used for monitoring and adjusting the conveying state of liquid air in real time. The intelligent multi-mode release device comprises an intelligent release device with plasma vaporization, ultrasonic nanometer atomization and vortex synergistic functions, through the steps of the intelligent multi-mode release device, efficient conversion and accurate distribution of liquid air from storage to a working face are achieved, the airflow speed and direction are adjusted in real time according to mine environment parameters, and the intelligent multi-mode release device has the advantages of being simple in structure and convenient to use. The uniform distribution and local cooling effect of fresh air are ensured, and the air quality of an operation area is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of mine environment control, and particularly to a method for local ventilation and cooling system in mines based on liquid air. Background Art

[0002] In mine operations, the ventilation system is crucial for ensuring the safety and health of personnel. Traditionally, mechanical fans are the main means to achieve mine ventilation. With the development of mining technology, especially in complex environments such as ultra-long distance drivage roadways or deep metal mine stopes, the application of mechanical fans gradually shows its limitations. The prior art has significantly improved the storage and transportation efficiency of liquid air by optimizing the design and material selection of storage containers. Although this progress has greatly promoted the application of liquid air in multiple fields, in the field of mine ventilation, its application still faces challenges, and further exploration and innovation are still needed in aspects such as the efficient and low-loss transportation of liquid air to the working face and how to intelligently adjust the release mode according to real-time environmental data.

[0003] Although the prior art has made remarkable achievements in the storage and transportation of liquid air, it has not fully considered the requirements of a large demand for fresh air, a high concentration of harmful gases, and strict temperature control in a special environment such as a mine. Especially during ultra-long distance drivage, problems such as insufficient oxygen supply, accumulation of harmful gases, and high temperature caused by insufficient air volume are particularly prominent. This not only affects work efficiency but also poses a potential threat to the health of miners. Traditional ventilation methods are difficult to achieve real-time monitoring and precise regulation and cannot effectively respond to the dynamic changes of environmental parameters in the mine. Summary of the Invention

[0004] In view of the above existing problems, the present invention is proposed.

[0005] Therefore, the present invention provides a local ventilation and cooling system in mines based on liquid air to solve the problems of insufficient oxygen supply, accumulation of harmful gases, and poor temperature control caused by insufficient air volume in traditional ventilation methods during ultra-long distance drivage.

[0006] To solve the above technical problems, the present invention provides the following technical solutions:

[0007] In a first aspect, the present invention provides a local ventilation and cooling system in mines based on liquid air, which includes an intelligent transportation pipeline, an intelligent multi-mode release device, an air purification and energy recovery device, and a mine environment adaptive monitoring and control system;

[0008] The intelligent transportation pipeline includes a multi-layer composite heat insulation structure and an intelligent control module. The intelligent control module includes a temperature sensor, a pressure sensor, and a flow sensor for real-time monitoring and adjusting the transportation state of liquid air;

[0009] The intelligent multi-mode release device includes an intelligent release device with functions of plasma vaporization, ultrasonic nano-atomization, and eddy current enhancement, which is used to adjust the air flow speed and direction for precise air supply and cooling.

[0010] The air purification and energy recovery device includes a low-temperature plasma purification module, a dust filtration module, a cold energy recovery module, and a condensate collection module, which are used for the removal of harmful gases and dust, as well as the recovery and utilization of cold energy and water resources.

[0011] The mine environment adaptive monitoring and control system includes oxygen concentration, harmful gas concentration, temperature, humidity, and dust concentration sensors. Based on Internet of Things and artificial intelligence technologies, it can real-time monitor the oxygen concentration, harmful gas concentration, temperature, humidity, and dust concentration.

[0012] As a preferred solution of the mine local ventilation and cooling system based on liquid air of the present invention, wherein: the inner wall of the intelligent conveying pipeline is coated with a nano-adiabatic material coating to reduce the evaporation loss of liquid air during transportation.

[0013] As a preferred solution of the mine local ventilation and cooling system based on liquid air of the present invention, wherein: the plasma vaporization heats and quickly vaporizes the liquid air by generating a plasma field to improve the conversion efficiency from liquid to gas.

[0014] The ultrasonic nano-atomization uses ultrasonic energy to decompose the liquid air into extremely fine particles to form a fog state, which is used to improve the vaporization speed and uniformity.

[0015] As a preferred solution of the mine local ventilation and cooling system based on liquid air of the present invention, wherein: the low-temperature plasma purification module uses low-temperature plasma technology to destroy the molecular structure of harmful gases and effectively remove harmful gases such as methane and carbon monoxide.

[0016] The dust filtration module uses a high-efficiency electrostatic precipitator and a HEPA filter to capture dust and particles in the air and purify the air quality.

[0017] The cold energy recovery module is used to recover the cold energy generated during the vaporization of liquid air.

[0018] The condensate collection module is used to process and utilize the condensate generated during the vaporization process.

[0019] As a preferred solution of the mine local ventilation and cooling system based on liquid air of the present invention, wherein: the mine environment adaptive monitoring and control system analyzes and predicts the change trend of environmental parameters in real time through artificial intelligence algorithms.

[0020] Second aspect, the present invention provides a method for local ventilation and cooling in a mine based on liquid air. The liquid air is transported from the storage point to the tunneling face in a low-loss manner through an intelligent control module. By using an intelligent multi-mode release device arranged at the tunneling face, the air is released according to the monitored data of oxygen concentration, harmful gas concentration, temperature, humidity, and dust concentration. The released air is processed by an air purification and energy recovery device, and the oxygen concentration, harmful gas concentration, temperature, humidity, and dust concentration are monitored in real time through a mine environment adaptive monitoring and control system. An artificial intelligence algorithm is used to predict the environmental change trend.

[0021] As the method for local ventilation and cooling in a mine based on liquid air according to the present invention, the intelligent release device with an eddy current enhancement function generates an eddy current through a nozzle structure, enabling the effective diffusion of cold air and used to adjust the direction and speed of the air flow.

[0022] As the method for local ventilation and cooling in a mine based on liquid air according to the present invention, the working shift and personnel distribution in the mine are obtained through the arranged work plan and real-time personnel positioning equipment.

[0023] As the method for local ventilation and cooling in a mine based on liquid air according to the present invention, the mine environment adaptive monitoring and control system optimizes the supply time and strategy of liquid air according to the working shift and personnel distribution in the mine.

[0024] As the method for local ventilation and cooling in a mine based on liquid air according to the present invention, when the intelligent monitoring and control system detects an abnormal situation, it automatically activates the safety valve and pressure relief device and issues an alarm.

[0025] The beneficial effects of the present invention are as follows: Through the steps of the intelligent multi-mode release device, the efficient conversion and precise distribution of liquid air from storage to the working face are realized. According to the mine environment parameters, the air flow speed and direction are adjusted in real time, ensuring the uniform distribution of fresh air and the local cooling effect, improving the air quality in the working area, and providing a more comfortable working environment for miners. The beneficial effects of optimizing ventilation efficiency and enhancing operation safety are achieved. The operation of the air purification and energy recovery device realizes the maximum utilization of resources and the purpose of environmental protection by effectively removing harmful gases and dust and recycling cold energy and water resources. The role of this step is to ensure the air quality in the mine while reducing energy consumption, further enhancing the sustainability and economy of the system. Description of the Drawings

[0026] To more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the accompanying drawings required for the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can be obtained based on these drawings.

[0027] Figure 1 It is a flowchart of a mine local ventilation and cooling system based on liquid air.

[0028] Figure 2 It is a schematic diagram of a mine local ventilation and cooling method based on liquid air. Detailed implementation manners

[0029] To make the above objects, features, and advantages of the present invention more obvious and understandable, the following will make a detailed description of the specific implementation manners of the present invention with reference to the accompanying drawings of the specification.

[0030] In the following description, many specific details are set forth to fully understand the present invention. However, the present invention can also be implemented in other ways different from those described herein. Those skilled in the art can make similar promotions without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0031] Secondly, the so-called "one embodiment" or "embodiment" herein refers to a specific feature, structure, or characteristic that can be included in at least one implementation manner of the present invention. The "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that excludes other embodiments.

[0032] Refer to Figure 1 Figure 2 , which is an embodiment of the present invention. This embodiment provides a mine local ventilation and cooling system based on liquid air, including the following steps:

[0033] The inner wall of the intelligent conveying pipeline is coated with a nano-thermal insulation material coating to reduce the evaporation loss of liquid air during transportation.

[0034] Furthermore, the inner wall of the intelligent conveying pipeline is coated with a nano-thermal insulation material coating to reduce the evaporation loss of liquid air during transportation. During the transportation of liquid air, by applying the nano-thermal insulation material coating on the inner wall of the intelligent conveying pipeline, the influence of the external environment on the internal temperature of the pipeline can be effectively reduced, thereby reducing the evaporation loss of liquid air caused by temperature rise. This ensures that the liquid air maintains a low temperature throughout the entire transportation path from the storage point to the tunneling face, maintaining its liquid state and avoiding waste of resources caused by unnecessary evaporation. The application of the nano-thermal insulation material coating enhances the heat insulation performance of the pipeline, enabling the liquid air to be transported to the target location in a highly efficient and low-loss state, providing a stable material basis for subsequent multi-mode release. This treatment method also indirectly supports the mine local ventilation and cooling systems to achieve more accurate and efficient air supply and temperature regulation functions.

[0035] Plasma vaporization heats and rapidly vaporizes liquid air by generating a plasma field to improve the conversion efficiency from liquid to gas.

[0036] Furthermore, plasma vaporization heats and rapidly vaporizes liquid air by generating a plasma field to improve the conversion efficiency from liquid to gas. The intelligent multi-mode release device uses a plasma generator to generate a plasma field, which can rapidly increase the local temperature, causing the liquid air to quickly convert to gas under its action. This process not only speeds up the vaporization rate of liquid air but also improves the conversion efficiency, ensuring that fresh air can be quickly and evenly distributed to the mine working face. In this way, sufficient fresh air can be provided to miners in a short time, the temperature of the working environment can be effectively reduced, the air quality can be improved, and the health and safety of miners can be guaranteed. The vaporization method combined with the intelligent conveying pipeline with a nano-thermal insulation material coating can further reduce the evaporation loss of liquid air during transportation, thus ensuring the efficiency and stability of the entire process.

[0037] Ultrasonic nano-atomization uses ultrasonic energy to break down liquid air into extremely fine particles, forming a fog state to improve the vaporization rate and uniformity.

[0038] Furthermore, ultrasonic nano-atomization utilizes ultrasonic energy to decompose liquid air into extremely fine particles, forming a fog-like state, which is used to improve the vaporization speed and uniformity. The ultrasonic nano-atomization function in the intelligent multi-mode release device generates high-frequency vibrations through an ultrasonic generator, causing the liquid air to be decomposed into tiny particles when passing through the device, forming a fog-like distribution, increasing the contact area between the liquid air and the surrounding environment, thus accelerating the process of its transformation from liquid to gas, and making the air distribution more uniform. In this way, not only the efficiency of fresh air supply is improved, but also it ensures that each area of the working face can obtain a uniform supply of fresh air, effectively improving the air quality in the mine and ensuring the safety and health of the operators. The application of ultrasonic nano-atomization combined with plasma vaporization can further optimize the air distribution effect and ensure that the entire ventilation and cooling process is more efficient and stable.

[0039] The low-temperature plasma purification module uses low-temperature plasma technology to break the molecular structure of harmful gases and effectively remove harmful gases such as methane and carbon monoxide.

[0040] Furthermore, the low-temperature plasma purification module uses low-temperature plasma technology to break the molecular structure of harmful gases and effectively remove harmful gases such as methane and carbon monoxide. During operation, the low-temperature plasma purification module generates a low-temperature plasma field, causing harmful gas molecules to be bombarded and excited by high-energy electrons in the field, resulting in the breaking of their chemical bonds and then being transformed into harmless or low-toxicity substances. Methane and carbon monoxide molecules will undergo decomposition reactions under the action of low-temperature plasma, generating relatively safe products such as carbon dioxide and water. This process can not only efficiently remove harmful gases in the mine, but also avoid the problem of secondary pollution that may be brought about by traditional purification methods. The low-temperature plasma purification module ensures the safety of the air quality in the mine and provides a healthier environment for the operators. In addition, this purification method combined with ultrasonic nano-atomization can further optimize the air distribution effect, ensure that the entire ventilation and cooling process is more efficient and stable, and contribute to improving the overall safety of the mine.

[0041] The dust filtration module is used to capture dust and particles in the air and purify the air quality through a high-efficiency electrostatic precipitator and a HEPA filter.

[0042] Furthermore, the dust filtration module captures dust and particles in the air through a high-efficiency electrostatic precipitator and a HEPA filter to purify the air quality. During operation, the air containing dust and particles first passes through the high-efficiency electrostatic precipitator. The electrostatic effect makes the particulate matter in the air charged and adsorbed onto the dust collection plate, thus achieving preliminary filtration. Then the air continues to pass through the HEPA filter, which can capture finer particulate matter, including particles with a diameter of 0.3 microns and above, ensuring deep purification of the air. The coal dust and other mineral dust generated during mine operations are effectively removed after these two steps, greatly reducing the content of suspended particulate matter in the air. This not only improves the air quality in the mine but also reduces the risk of miners suffering from respiratory diseases. The combination of the dust filtration module and the low-temperature plasma purification module can further enhance the overall air purification effect, ensuring a cleaner and safer mine environment and protecting the health of the operating personnel.

[0043] The cold energy recovery module is used to recover the cold energy generated during the vaporization of liquid air.

[0044] Furthermore, the cold energy recovery module is used to recover the cold energy generated during the vaporization of liquid air. During operation, when the liquid air vaporizes through the intelligent multi-mode release device, the cold energy recovery module captures and stores the cold released during this process.

[0045] Specifically, the low-temperature environment during the vaporization process is used to cool other media or directly stored for subsequent use, assisting in local cooling in the mine or other equipment that requires cooling. The recovery of cold energy not only improves the energy utilization efficiency but also reduces the dependence on external refrigeration equipment, thereby reducing the overall energy consumption and operating costs. The cold energy recovery module ensures the effective utilization of the cold energy generated during the vaporization of liquid air, further enhancing the effect of mine environment control and providing support for achieving more energy-saving and environmentally friendly mine ventilation and cooling. The combination of the cold energy recovery module and the dust filtration module can optimize the energy utilization efficiency of the entire process, ensuring the formation of an efficient and coordinated operation chain among various treatment steps, and jointly improving the safety and comfort of mine operations.

[0046] The condensate collection module is used to process and utilize the condensate generated during the vaporization process.

[0047] Furthermore, the condensate water collection module is used to process and utilize the condensate water generated during the vaporization process. During operation, when liquid air is vaporized through the intelligent multi-mode release device, condensate water is generated as a by-product and captured by the condensate water collection module. The condensate water is first preliminarily filtered to remove possible impurities, and then stored or directly used for various applications in the mine, such as dust suppression by sprinkling water, equipment cooling, or fire extinguishing. The collected condensate water can be used to reduce the dust concentration in the mine, improve the air quality, or provide a water source for equipment that needs to be cooled, reducing the dependence on the external water supply system. This method not only realizes the effective reuse of resources, but also reduces the mine operation cost, and helps to improve the overall environmental management efficiency. The combination of the condensate water collection module and the cold energy recovery module can further optimize the comprehensive utilization of energy and water resources, ensure that the whole process is more environmentally friendly and efficient, and jointly provide a safer and healthier working environment for the mine.

[0048] The mine environment adaptive monitoring and control system analyzes and predicts the changing trends of environmental parameters in real time through artificial intelligence algorithms.

[0049] Furthermore, the mine environment adaptive monitoring and control system analyzes and predicts the changing trends of environmental parameters in real time through artificial intelligence algorithms. The data collected by oxygen concentration, harmful gas concentration, temperature, humidity, and dust concentration sensors are transmitted to the central processing unit. Artificial intelligence algorithms are used to deeply analyze the data of oxygen concentration, harmful gas concentration, temperature, humidity, and dust concentration to identify patterns and predict future changing trends. Through learning historical data, the artificial intelligence algorithm can predict in advance the possible decrease in oxygen concentration or increase in harmful gas concentration in a certain area, and automatically adjust the delivery volume and release mode of liquid air accordingly to ensure that the environmental parameters always remain within the safe range. The real-time monitoring and prediction capabilities not only improve the response speed and accuracy of mine environment management, but also enable preventive measures to be taken before potential hazards occur, thus ensuring the safety and health of workers. Combined with the application of the condensate water collection module, the mine environment adaptive monitoring and control system can further optimize resource utilization, ensure the formation of an efficient and coordinated operation chain among various processing steps, and jointly improve the safety and comfort of mine operations.

[0050] This embodiment also provides a method for local ventilation and cooling in a mine based on liquid air. The intelligent control module transports liquid air from the storage point to the tunneling face in a low-loss manner. By using the intelligent multi-mode release device arranged at the tunneling face, the air is released according to the monitored data such as oxygen concentration, harmful gas concentration, temperature, humidity, and dust concentration. The released air is processed by the air purification and energy recovery device, and the oxygen concentration, harmful gas concentration, temperature, humidity, and dust concentration are monitored in real time through the mine environment adaptive monitoring and control system. An artificial intelligence algorithm is used to predict the environmental change trend.

[0051] The intelligent release device with vortex enhancement function generates vortices through the nozzle structure, enabling the effective diffusion of cold air for adjusting the direction and speed of the air flow.

[0052] Furthermore, the intelligent release device with vortex enhancement function generates vortices through the nozzle structure, enabling the effective diffusion of cold air for adjusting the direction and speed of the air flow. During the operation, the intelligent multi-mode release device uses a specially designed nozzle structure to generate vortices after the liquid air undergoes plasma vaporization or ultrasonic nanoatomization. These vortices can guide the cold air to evenly diffuse within the mine working face, ensuring that the cold air covers every corner. By adjusting the angle and outlet size of the nozzle, the direction and speed of the air flow can be precisely controlled, enabling the fresh air to be transported to specific areas according to actual needs, thereby achieving a more uniform temperature distribution and improved air quality. This not only improves the local ventilation efficiency but also enhances the cooling effect, providing a more comfortable working environment for miners. Combined with the application of the condensate collection module, the vortex enhancement function further optimizes the air flow path, ensuring that the entire process is more efficient and coordinated, jointly enhancing the safety and comfort of mine operations.

[0053] The mine operation shifts and personnel distribution are obtained through the arranged work plan and real-time personnel positioning equipment.

[0054] Furthermore, the mine operation shifts and personnel distribution are obtained through the arranged work plan and real-time personnel positioning equipment. During the operation, the pre-established work plan clarifies the work tasks and time arrangements for each shift, while the real-time personnel positioning equipment is used to track and record the specific location information of miners. By using technologies such as radio frequency identification (RFID), global positioning system (GPS), or Bluetooth positioning devices, the movement of each miner within the mine can be accurately monitored. These information are centrally collected and analyzed to determine the personnel distribution in each working face. The mine environment adaptive monitoring and control system can optimize the supply time and strategy of liquid air according to the actual personnel distribution, ensuring energy-saving effects while guaranteeing air quality.

[0055] The mine environment adaptive monitoring and control system optimizes the supply time and strategy of liquid air according to the mine operation shifts and personnel distribution.

[0056] Furthermore, the mine environment adaptive monitoring and control system optimizes the supply time and strategy of liquid air according to the mine operation shifts and personnel distribution. The information on mine operation shifts and personnel distribution obtained through the pre-arranged work plan and real-time personnel positioning equipment is transmitted to the central processing unit. The mine environment adaptive monitoring and control system uses artificial intelligence algorithms to analyze and predict the demand situation of each working face in different time periods, so as to dynamically adjust the supply time and strategy of liquid air. During high-density operation areas or specific shifts, the supply volume of liquid air is increased, and the working mode of the intelligent multi-mode release device is adjusted to meet higher ventilation and cooling requirements. While in low-density operation areas or off-peak periods, the supply volume is reduced to achieve energy-saving effects. This not only improves the resource utilization efficiency but also ensures that the air quality in the mine always remains in the best state, providing a safer and healthier working environment for miners. Combining with the application of the eddy current enhancement function, the air flow direction and speed can be further optimized to ensure that fresh air can evenly cover every working point.

[0057] When the intelligent monitoring and control system detects an abnormal situation, it automatically activates the safety valve and pressure relief device and issues an alarm.

[0058] Furthermore, the mine environment parameters are continuously monitored through oxygen concentration, harmful gas concentration, temperature, humidity, and dust concentration sensors. Once these parameters exceed the preset safety range, such as too low oxygen concentration or too high harmful gas concentration, the intelligent monitoring and control system will immediately trigger the response mechanism;

[0059] Specifically, the safety valve and pressure relief device will be automatically activated to quickly reduce the pressure and prevent the potential dangerous situation from deteriorating further. At the same time, the alarm system is activated to send an emergency notice to the miners, prompting them to take necessary protective measures or evacuate the scene. This can not only respond to emergencies in a timely manner but also maximize the protection of the lives and health of miners. Combining with the information on mine operation shifts and personnel distribution, the affected area can be more accurately located, and the emergency response strategy can be optimized to ensure that each miner can receive timely and effective protection.

[0060] In summary, through the steps of the intelligent multi-mode release device, the present invention realizes the efficient conversion and precise distribution of liquid air from storage to the working face, adjusts the air flow velocity and direction in real time according to the mine environmental parameters, ensures the uniform distribution of fresh air and the local cooling effect, improves the air quality of the working area, and also provides a more comfortable working environment for miners, achieving the beneficial effects of optimizing ventilation efficiency and enhancing operation safety. The operation of the air purification and energy recovery device realizes the maximum utilization of resources and the purpose of environmental protection by effectively removing harmful gases and dust and recovering cold energy and water resources. The role of this step is to ensure the air quality in the mine while reducing energy consumption, further enhancing the sustainability and economy of the system.

[0061] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. A mine local ventilation and cooling system based on liquid air, characterized in that: It includes an intelligent conveying pipeline, an intelligent multi-mode release device, an air purification and energy recovery device, and a mine environment adaptive monitoring and control system; The intelligent conveying pipeline includes a multi-layer composite heat insulation structure and an intelligent control module. The intelligent control module includes a temperature sensor, a pressure sensor, and a flow sensor, which are used to monitor and adjust the conveying state of liquid air in real time; The intelligent multi-mode release device includes an intelligent release device with functions of plasma vaporization, ultrasonic nano-atomization, and vortex enhancement, which is used to adjust the air flow velocity and direction for precise air supply and cooling; The air purification and energy recovery device includes a low-temperature plasma purification module, a dust filtration module, a cold energy recovery module, and a condensate collection module, which are used for the removal of harmful gases and dust, as well as the recovery and utilization of cold energy and water resources; The mine environment adaptive monitoring and control system includes oxygen concentration, harmful gas concentration, temperature, humidity, and dust concentration sensors. Based on Internet of Things and artificial intelligence technologies, it monitors the oxygen concentration, harmful gas concentration, temperature, humidity, and dust concentration in real time.

2. The mine local ventilation and cooling system based on liquid air according to claim 1, wherein: The inner wall of the intelligent conveying pipeline is coated with a nano heat insulation material coating to reduce the evaporation loss of liquid air during transportation.

3. The local mine ventilation and cooling system based on liquid air according to claim 2, characterized in that: The plasma vaporization heats and rapidly vaporizes liquid air by generating a plasma field to improve the conversion efficiency from liquid to gas; The ultrasonic nano-atomization uses ultrasonic energy to decompose liquid air into extremely fine particles to form a fog state, which is used to improve the vaporization speed and uniformity.

4. The mine local ventilation and cooling system based on liquid air according to claim 3, wherein: The low-temperature plasma purification module uses low-temperature plasma technology to destroy the molecular structure of harmful gases and effectively remove harmful gases such as methane and carbon monoxide; The dust filtration module uses a high-efficiency electrostatic precipitator and a HEPA filter to capture dust and particles in the air and purify the air quality; The cold energy recovery module is used to recover the cold energy generated during the vaporization of liquid air; The condensate collection module is used to process and utilize the condensate generated during the vaporization process.

5. The local mine ventilation and cooling system based on liquid air according to claim 4, characterized in that: The mine environment adaptive monitoring and control system analyzes and predicts the change trend of environmental parameters in real time through artificial intelligence algorithms.

6. The method for local mine ventilation and cooling based on liquid air according to claim 5, characterized in that: Through the intelligent control module, liquid air is conveyed from the storage point to the tunneling face in a low-loss manner using the intelligent multi-mode release device arranged at the tunneling face. According to the monitored data of oxygen concentration, harmful gas concentration, temperature, humidity, and dust concentration, the air is released. The released air is processed by the air purification and energy recovery device, and the oxygen concentration, harmful gas concentration, temperature, humidity, and dust concentration are monitored in real time through the mine environment adaptive monitoring and control system, and the artificial intelligence algorithm is used to predict the environmental change trend.

7. The method for local ventilation and temperature reduction in a mine based on liquid air according to claim 6, characterized in that: The intelligent release device with vortex enhancement function generates a vortex through the nozzle structure to effectively diffuse the cold air, which is used to adjust the direction and speed of the air flow.

8. The method for local mine ventilation and cooling based on liquid air according to claim 7, characterized in that: Through the arranged work plan and real-time personnel positioning equipment, the mine operation shifts and personnel distribution are obtained.

9. The method for local ventilation and cooling in a mine based on liquid air according to claim 8, characterized in that: The mine environment adaptive monitoring and control system optimizes the supply time and strategy of liquid air according to the mine operation shifts and personnel distribution.

10. The method for local ventilation and cooling in a mine based on liquid air according to claim 9, characterized in that: When the intelligent monitoring and control system detects an abnormal situation, it automatically activates the safety valve and pressure relief device and issues an alarm.

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