Coal mine ventilation shaft fan stop coordination control and lane network air volume control system and method

Abstract

The present invention is applicable to the field of intelligent monitoring of coal mine ventilation systems, and provides a system and method for coordinated control of coal mine air shaft fan shutdown and tunnel network air volume regulation, including: a fan monitoring and early warning module, which is used to monitor online parameters of fan operating conditions and underground air network monitoring parameters, diagnose faults based on a support vector machine algorithm, deeply mine abnormal information of fan operation, and issue early warnings for abnormal fan states and air shutdown alarms; a fan coordinated control and analysis module, which is used to analyze fan failures and reasons for air shutdown, call a database of fan operating condition characteristic curves, analyze the expected operating conditions of related fans that expand their service range after air shutdown, and use an expert decision generation module to formulate a linkage control plan. The beneficial effects of the present invention are: providing double protection against possible abnormal risks of major fans, and having great significance for disaster prevention and mitigation of mine ventilation systems.

Description

Technical Field

[0001] The present invention belongs to the field of intelligent monitoring of coal mine ventilation systems, and in particular relates to a system and method for coordinated control of wind stoppage of coal mine ventilation shaft fans and air volume regulation of lane networks. Background Art

[0002] The mine ventilation system is one of the basic systems of coal mine production. It is responsible for supplying sufficient fresh air to the underground work site, diluting and discharging toxic and harmful gases, dust, heat and humidity underground. It consists of a shaft ventilation network, main fans that drive the airflow, and ventilation structures that control the airflow.

[0003] Against the backdrop of the rapid development of efficient, large-scale, intensively produced mines, their ventilation system networks are characterized by simple topological structures, high ventilation resistance at air-using locations, and rapid mining advances. These factors contribute to rapid and significant changes in ventilation system resistance. Consequently, ventilation equipment and facilities are becoming increasingly crucial to the ventilation system, as failure can lead to failure of most, or even the entire, system. Mine main ventilation fans, providing sufficient fresh air to underground workplaces and removing harmful gases, are essential core equipment in coal mining. As air demand and ventilation resistance continue to increase, some mines are adopting multiple intake and return ventilation systems to meet ventilation needs. This, however, increases the difficulty of coordinated control and management of main ventilation fans. Mine main ventilation fans operate in harsh environments, with long operating cycles and complex operating conditions, making them prone to equipment failure. A failure and air stoppage can reduce or even reverse airflow in certain areas of the mine. Failure to promptly repair the fans or implement emergency airflow control can lead to accidents such as excessive harmful gases and suffocation.

[0004] Current research on ventilation assurance for mine main ventilation fans focuses primarily on fault diagnosis and normal ventilation. Utilization of real-time information from mine fan monitoring systems is still relatively limited. Ventilation monitoring parameters remain limited to simple functions such as direct display of data collected by sensors, statistical processing, and over-limit alarms. Effective hazard identification, analysis, and expert decision-making based on the parameters of the monitored environment are not yet possible. Furthermore, variable frequency control of main ventilation fans is limited to normal ventilation or in the event of a disaster underground. There is no consideration of coordinated emergency ventilation with the remaining normally operating fans in a multi-fan mine when a single fan fails and stops. Summary of the Invention

[0005] The purpose of the embodiments of the present invention is to provide a system and method for coordinated control of coal mine shaft fan shutdown and tunnel network air volume control, organically combining the coal mine monitoring and supervision system with computer technology, PLC control technology, fault diagnosis and analysis technology, fan frequency conversion control technology, optimization selection algorithm of adjustment branches, intelligent software development and other fields of knowledge, to achieve real-time monitoring of ground fan operating parameters and ventilation parameters underground in the coal mine, and to fuse and analyze the information, to provide early warning and alarm for fan failures, and after a single fan fails, to analyze and judge the area that meets the safety guarantee air volume requirements, and then to jointly control the underground dampers, wind windows and ground fans according to the control plan, to reduce the scope of influence of underground airflow stagnation, reversal and other problems caused by single fan failures.

[0006] The embodiment of the present invention is implemented as follows: on the one hand, a system for coordinated control of fan stoppage in a coal mine ventilation shaft and air volume control in a lane network includes:

[0007] The fan monitoring and early warning module is used to monitor the online parameters of the fan operating conditions and the underground air network monitoring parameters, diagnose faults based on the support vector machine algorithm, deeply mine abnormal information of fan operation, and issue early warnings for abnormal fan conditions and air stop alarms;

[0008] The fan collaborative control and analysis module is used to analyze the causes of fan failures and shutdowns, access the fan operating condition characteristic curve database, analyze the expected operating conditions of related fans after the fan shutdown and expand the service range, and use the expert decision generation module to develop a coordinated control plan;

[0009] The lane network safety air volume assessment module uses ventilation network calculation software to dynamically predict the distribution of lane network branch air volume after a single fan stops, and determines the service area of ​​the associated fans that meets the safety air volume requirements after the single fan stops.

[0010] The alley network air volume linkage control module is used to perform advanced simulation and solution of the control plan, and to control the ventilation sub-module in a linkage manner when a single fan stops blowing. It verifies the control effect through real-time feedback from alley wind speed monitoring, adjusts the operating frequency of the associated main ventilation fans, meets the air volume demand of the expanded air supply area, and coordinates to reduce the impact range of the single fan stoppage failure.

[0011] On the other hand, a method for coordinated control of wind shaft fan stoppage and lane network air volume regulation in a coal mine specifically includes the following steps:

[0012] The fan monitoring and early warning module monitors the fan operating parameters online. At the same time, the underground air network monitoring system monitors the ventilation parameters of the underground ventilation network branches in real time and transmits them to the surface host computer interaction submodule through the industrial Ethernet communication system for dynamic analysis and judgment of the ventilation system.

[0013] When the fan monitoring and early warning module uses the support vector machine algorithm for fault diagnosis and deeply mines the abnormal information of the fan operation, if a fan failure or fan stop is found, the host computer interaction submodule will warn the fan abnormal state and issue a fan stop alarm;

[0014] The upper computer interaction submodule uses the fan collaborative control analysis module to quickly identify fan failures and shutdown causes, accesses the fan operating condition characteristic curve database, analyzes the expected operating conditions of the associated fans after the fan stops, and uses the expert decision generation module to develop a linkage control plan;

[0015] The ventilation network is iteratively solved using the preset ventilation model and monitored ventilation parameters in the database, and verified with the safety assurance air volume threshold range of the key tunnel branches to achieve advanced simulation of the adjustment plan and verify the proposed adjustment plan. The ventilation sub-module is then controlled in a coordinated manner, and the control effect is verified through real-time feedback from tunnel wind speed monitoring. The operating frequency of the associated main ventilation fan is adjusted to meet the air volume demand of the expanded air supply area, and the scope of impact of single fan shutdown failure is reduced through coordinated linkage.

[0016] Furthermore, the specific steps of the linkage control scheme include:

[0017] According to the logical relationship between the branches of the air distribution points in the underground ventilation network of a mine with multiple fans operating together, the optimal air distribution adjustment branch is selected. After the server conducts advanced simulation and safety inspection of the adjustment plan, the server of the upper computer interaction sub-module sends the adjustment command to the underground damper control device to execute the adjustment of key ventilation facilities, open the associated locking dampers, change the ventilation network structure, and expand the service range of the associated fans.

[0018] After changing the ventilation network structure, the operating frequency of the ground fan needs to be adjusted. The server of the upper computer interaction submodule predicts the required air volume based on the adjusted ventilation network conditions, and then uses the curve search method to complete the fan frequency adjustment. The required air volume that meets the key branches underground is obtained through the ventilation network solution iteration. The total required air volume is calculated and the fan operating conditions are quickly searched in the fan characteristic curve library to obtain the adjustment frequency.

[0019] After the upper computer interaction sub-module server conducts advance simulation and safety verification of the adjustment plan, the server sends the adjustment command to the fan monitoring substation, which executes the adjustment of the fan operating frequency. At the same time, the server monitors the adjustment process of the ventilation network associated branches in real time and displays various ventilation parameters on the terminal in real time until the air volume requirements of the key branches are met.

[0020] The system and method for coordinated control of fan shutdowns and tunnel network air volume regulation provided in the embodiments of the present invention are applicable to multi-fan ventilation systems in coal mines. They can provide early warnings and air shutdown alarms for each fan failure, and after a single fan fails and stops, the impact of the single fan failure is reduced by jointly controlling the underground ventilation structure and the remaining normally operating fans above ground. An emergency air adjustment method for dealing with single fan shutdowns is proposed, which provides double protection against possible abnormal risks of the main fans and is of great significance to disaster prevention and mitigation of mine ventilation systems. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a structural diagram of the wind turbine monitoring, early warning and linkage control system.

[0022] Figure 2 This is the flow chart of the lane network linkage control. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0024] The specific implementation of the present invention is described in detail below with reference to specific embodiments.

[0025] The system and method for coordinated control of blower stoppage in coal mine ventilation shafts and air volume regulation in lane networks provided by the present invention solve the technical problems in the background technology.

[0026] like Figure 1 and Figure 2 FIG. 1 is a schematic diagram of the operation of a system for coordinated control of fan stoppage in a coal mine ventilation shaft and air volume control in a laneway network, provided by one embodiment of the present invention. The system comprises:

[0027] The fan monitoring and early warning module is used to monitor the online parameters of the fan operating conditions and the underground air network monitoring parameters, diagnose faults based on the support vector machine algorithm, deeply mine abnormal information of fan operation, and issue early warnings for abnormal fan conditions and air stop alarms;

[0028] The fan collaborative control and analysis module is used to analyze the causes of fan failures and shutdowns, access the fan operating condition characteristic curve database, analyze the expected operating conditions of related fans after the fan shutdown and expand the service range, and use the expert decision generation module to develop a coordinated control plan;

[0029] The lane network safety air volume assessment module uses ventilation network calculation software to dynamically predict the distribution of lane network branch air volume after a single fan stops, and determines the service area of ​​the associated fans that meets the safety guarantee air volume requirement (≥40% of the normal air volume) after the single fan stops.

[0030] The alley network air volume linkage control module is used to perform advanced simulation and solution of the control plan, and to control the ventilation sub-module in a linkage manner when a single fan stops blowing. It verifies the control effect through real-time feedback from alley wind speed monitoring, adjusts the operating frequency of the associated main ventilation fans, meets the air volume demand of the expanded air supply area, and coordinates to reduce the impact range of the single fan stoppage failure.

[0031] As a preferred embodiment of the present invention, the fan monitoring and early warning module includes a fan online monitoring submodule, an underground ventilation network monitoring submodule, and a host computer interaction submodule;

[0032] The fan online monitoring submodule is used to monitor the fan operating parameters, including air volume, temperature, atmospheric pressure, negative pressure, total pressure, dynamic pressure, speed, shaft temperature sensor, current, voltage, power, efficiency, operating frequency, vibration frequency, and noise spectrum;

[0033] The underground ventilation network monitoring submodule is used to monitor underground ventilation network parameters, including various wind speeds, wind pressures, wind directions, methane concentrations, atmospheric pressures, dry and wet temperatures, and ventilation facility status information;

[0034] The host computer interaction submodule is used to display various operating parameters of the fan online monitoring, analyze the operating status of the fan through the prediction model, conduct comprehensive analysis and evaluation of the fan and ventilation parameter monitoring information, predict fan failure and alarm for wind stoppage, including servers, professional software, dedicated databases, and display terminals.

[0035] like Figure 2 As shown, as another preferred embodiment of the present invention, the wind turbine collaborative management and control analysis module includes a wind turbine fault analysis submodule, a wind turbine operating characteristic curve generation module, and an expert decision generation module;

[0036] The fan fault diagnosis submodule is used to dynamically analyze fan faults through a fault diagnosis model based on a support vector machine, determine the fault type and quantify the damage extent;

[0037] The fan operating characteristic curve generation module includes fan operating characteristic curves at different frequencies, which is used to provide support for matching the air volume supply and demand of the fan-ventilation network and establish a Qf linkage control function;

[0038] The expert decision generation module uses a decision tree analysis method to determine the coordinated control mode of multiple wind shaft fans, and uses an expert auxiliary decision database to generate a fan fault linkage control plan.

[0039] As another preferred embodiment of the present invention, the lane network safety air volume evaluation module includes a ventilation network safety assurance air volume threshold calculation submodule, a ventilation network dynamic solution submodule, and an associated fan service area evaluation submodule;

[0040] The ventilation network safety guarantee air volume threshold calculation submodule is used to calculate the safety guarantee air volume of each branch of the ventilation network based on the personnel distribution in each area, gas parameters, tunnel properties, and equipment configuration factors, and determine the safety guarantee air volume threshold range of key tunnel branches;

[0041] The ventilation network dynamic solver module is used to obtain the wind resistance value of the branch with wind resistance variation through dynamic monitoring of branch air volume and the wind measurement and resistance calculation method with Tikhonov regularization, and iteratively solve and obtain the dynamic air volume value of each branch of the ventilation network through the greedy evolutionary algorithm and the generalized cross-validation criterion;

[0042] The associated fan service area analysis submodule is used to substitute the calculation results of the ventilation network dynamic solution submodule into the safety guarantee air volume threshold interval of the key tunnel branch, and prompt a warning message when the air volume of the associated fan service area branch exceeds the safety guarantee air volume threshold interval.

[0043] As another preferred embodiment of the present invention, the lane network air volume linkage control module includes a lane network branch air volume adjustment advance simulation analysis submodule, a linkage control ventilation submodule, and a fan frequency conversion control submodule;

[0044] The advance simulation analysis submodule of the lane network branch air volume adjustment is used to build a simulation model of the mine ventilation system. After the expert decision generation module generates the fan failure linkage control plan, it simulates and analyzes the underground ventilation network and the fan control plan to determine the risk of disaster caused by the control and ensure the safety and reliability of the system adjustment.

[0045] The linkage control ventilation submodule includes a remote controller and ventilation facilities. It can effectively adjust the branch air volume by remotely controlling the wind resistance of the wind window, and change the structure of the ventilation network and the service range of the fan by remotely controlling the opening and closing state of the damper to meet the demand for expanding the air volume of the air supply area.

[0046] The fan frequency conversion control submodule, after the server of the ground monitoring center predicts the required air volume according to the abnormal ventilation situation, uses the curve search method to complete the fan frequency regulation. The curve search method obtains the fan characteristic curve that meets the required air volume through network solution, and quickly searches in the fan characteristic curve library to obtain the adjustment frequency of the fan. The fan frequency conversion control submodule is used to adjust according to the adjustment frequency of the fan to achieve coordinated linkage to reduce the scope and degree of impact of a single fan stoppage failure on the ventilation system.

[0047] An embodiment of the present invention provides a method for coordinated control of wind shaft fan stoppage and lane network air volume regulation in a coal mine, specifically comprising the following steps:

[0048] Step 1: The fan monitoring and early warning module monitors the fan operating parameters online. At the same time, the underground air network monitoring system monitors the ventilation parameters of the underground ventilation network branches in real time and transmits them to the surface host computer interaction submodule through the industrial Ethernet communication system for dynamic analysis and judgment of the ventilation system;

[0049] Step 2: When the fan monitoring and early warning module uses the support vector machine algorithm to diagnose faults, it deeply mines abnormal information about the fan operation. If a fan failure or fan stoppage is found, the host computer interaction submodule will warn of the abnormal state of the fan and issue a fan stop alarm.

[0050] Step 3: The host computer interaction submodule uses the fan collaborative control analysis module to quickly identify fan failures and shutdown causes, access the fan operating condition (variable frequency) characteristic curve database, analyze the expected operating conditions of the associated fans after the fan shutdown to expand the service range, and use the expert decision generation module to develop a linkage control plan;

[0051] Step 4: Use the preset ventilation model and monitored ventilation parameters in the database to iteratively solve the ventilation network, verify it with the safety assurance air volume threshold range of the key tunnel branches, realize advanced simulation of the adjustment plan, verify the proposed adjustment plan, and then control the ventilation sub-module in a coordinated manner. Verify the control effect through real-time feedback from tunnel wind speed monitoring, adjust the operating frequency of the associated main ventilation fan, meet the air volume demand of the expanded air supply area, and coordinate to reduce the impact range of single fan stoppage failure.

[0052] The specific steps of the linkage control scheme include:

[0053] Step 3.1: According to the logical relationship of the air distribution point branches in the underground ventilation network of the mine with multiple fans in joint operation, the optimal air distribution adjustment branch is selected. After the server performs advanced simulation and safety inspection on the adjustment plan, the server of the upper computer interaction sub-module sends the adjustment command to the underground damper control device to execute the adjustment of key ventilation facilities (dampers, windows), open the associated locking dampers, change the ventilation network structure, and expand the service range of the associated fans.

[0054] Step 3.2: After changing the ventilation network structure, the operating frequency of the ground fan needs to be adjusted. The server of the upper computer interaction submodule predicts the required air volume based on the adjusted ventilation network conditions. Specifically, the curve search method is used to complete the variable frequency adjustment of the fan. The required air volume that meets the key branches underground is obtained through the ventilation network solution iteration. The total required air volume is calculated and the fan operating conditions are quickly searched in the fan characteristic curve library to obtain the adjustment frequency.

[0055] Step 3.3: After the upper computer interaction sub-module server performs advance simulation and safety verification on the adjustment plan, the server sends the adjustment command to the fan monitoring substation, which executes the adjustment of the fan operating frequency. At the same time, the server monitors the adjustment process of the ventilation network associated branches in real time and displays various ventilation parameters on the terminal in real time until the air volume requirements of the key branches are met.

[0056] The system and method for coordinated control of fan shutdown in coal mine ventilation shafts and air volume regulation in the above-mentioned embodiments of the present invention are applicable to multi-fan ventilation systems in coal mines. They can provide early warnings and air shutdown alarms for each fan failure, and after a single fan fails and stops, the impact of the single fan failure is reduced by jointly controlling the underground ventilation structure and the remaining normally operating fans above ground. An emergency air adjustment method for dealing with single fan shutdown is proposed, which provides double protection against possible abnormal risks of the main fans and is of great significance to disaster prevention and mitigation of mine ventilation systems.

[0057] In order to enable the above-mentioned method and system to be loaded and run smoothly, in addition to the various modules mentioned above, the system may also include more or fewer components than described above, or a combination of certain components, or different components, for example, it may include input and output devices, network access devices, buses, processors and memories, etc.

[0058] It should be understood that although the various steps in the flow charts of the various embodiments of the present invention are shown in sequence according to the instructions of the arrows, these steps are not necessarily performed in sequence according to the order indicated by the arrows. Unless clearly stated herein, the execution of these steps is not strictly limited in order, and these steps can be performed in other orders. Moreover, at least a portion of the steps in the various embodiments may include multiple sub-steps or multiple stages, and these sub-steps or stages are not necessarily performed at the same time, but can be performed at different times, and the execution order of these sub-steps or stages is not necessarily performed in sequence, but can be performed in turn or alternately with at least a portion of other steps or sub-steps or stages of other steps.

[0059] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0060] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

[0061] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A system for coordinated control of fan stoppage in coal mine ventilation shafts and air volume control in lane networks, characterized in that: include: The fan monitoring and early warning module is used to monitor the online parameters of the fan operating conditions and the underground air network monitoring parameters, diagnose faults based on the support vector machine algorithm, deeply mine abnormal information of fan operation, and issue early warnings for abnormal fan conditions and air stop alarms; The fan collaborative control and analysis module is used to analyze the causes of fan failures and shutdowns, access the fan operating condition characteristic curve database, analyze the expected operating conditions of related fans after the fan shutdown and expand the service range, and use the expert decision generation module to develop a coordinated control plan; The lane network safety air volume assessment module uses ventilation network calculation software to dynamically predict the distribution of lane network branch air volume after a single fan stops, and determines the service area of ​​the associated fans that meets the safety air volume requirements after the single fan stops. The lane network air volume linkage control module is used to simulate and solve the control scheme in advance, and to control the ventilation sub-module in conjunction with the ventilation sub-module when a single fan stops. The control effect is verified through real-time feedback from lane wind speed monitoring, and the operating frequency of the associated main ventilation fans is adjusted to meet the air volume demand of the expanded air supply area, and the coordinated linkage reduces the scope of the impact of the single fan stoppage failure; The lane network safety air volume evaluation module includes a ventilation network safety assurance air volume threshold calculation submodule, a ventilation network dynamic solution module, and an associated fan service area evaluation submodule; The ventilation network safety guarantee air volume threshold calculation submodule is used to calculate the safety guarantee air volume of each branch of the ventilation network based on the personnel distribution in each area, gas parameters, tunnel properties, and equipment configuration factors, and determine the safety guarantee air volume threshold range of key tunnel branches; The ventilation network dynamic solver module is used to obtain the wind resistance value of the branch with wind resistance variation through dynamic monitoring of branch air volume and the wind measurement and resistance calculation method with Tikhonov regularization, and iteratively solve and obtain the dynamic air volume value of each branch of the ventilation network through the greedy evolutionary algorithm and the generalized cross-validation criterion; The associated fan service area analysis submodule is used to substitute the calculation results of the ventilation network dynamic solution submodule into the safety guarantee air volume threshold interval of the key tunnel branch, and prompt a warning message when the air volume of the associated fan service area branch exceeds the safety guarantee air volume threshold interval.

2. The coal mine ventilation shaft fan stop coordinated control and lane network air volume control system according to claim 1 is characterized in that: The fan monitoring and early warning module includes a fan online monitoring submodule, an underground ventilation network monitoring submodule, and a host computer interaction submodule; The fan online monitoring submodule is used to monitor the fan operating parameters, including air volume, temperature, atmospheric pressure, negative pressure, total pressure, dynamic pressure, speed, shaft temperature sensor, current, voltage, power, efficiency, operating frequency, vibration frequency, and noise spectrum; The underground ventilation network monitoring submodule is used to monitor underground ventilation network parameters, including various wind speeds, wind pressures, wind directions, methane concentrations, atmospheric pressures, dry and wet temperatures, and ventilation facility status information; The host computer interaction submodule is used to display various operating parameters of the fan online monitoring, analyze the operating status of the fan through the prediction model, conduct comprehensive analysis and evaluation of the fan and ventilation parameter monitoring information, predict fan failure and alarm for wind stop.

3. The coal mine ventilation shaft fan stop coordinated control and lane network air volume control system according to claim 2 is characterized in that: The wind turbine collaborative control and analysis module includes a wind turbine fault analysis submodule, a wind turbine operating characteristic curve generation module, and an expert decision generation module; The fan fault diagnosis submodule is used to dynamically analyze fan faults through a fault diagnosis model based on a support vector machine, determine the fault type and quantify the damage extent; The fan operating characteristic curve generation module includes fan operating characteristic curves at different frequencies, which is used to provide support for matching the air volume supply and demand of the fan-ventilation network and establish a Qf linkage control function; The expert decision generation module uses a decision tree analysis method to determine the coordinated control mode of multiple wind shaft fans, and uses an expert auxiliary decision database to generate a fan fault linkage control plan.

4. The coal mine ventilation shaft fan stop coordinated control and lane network air volume control system according to claim 1 is characterized in that: The lane network air volume linkage control module includes a lane network branch air volume adjustment advance simulation analysis submodule, a linkage control ventilation submodule, and a fan frequency conversion control submodule; The advance simulation analysis submodule of the lane network branch air volume adjustment is used to build a simulation model of the mine ventilation system. After the expert decision generation module generates the fan failure linkage control plan, it simulates and analyzes the underground ventilation network and the fan control plan to determine the risk of disaster caused by the control and ensure the safety and reliability of the system adjustment. The linkage control ventilation submodule includes a remote controller and ventilation facilities. It can effectively adjust the branch air volume by remotely controlling the wind resistance of the wind window, and change the structure of the ventilation network and the service range of the fan by remotely controlling the switch state of the damper to meet the demand for expanding the air volume of the air supply area. The fan frequency conversion control submodule, after the server of the ground monitoring center predicts the required air volume according to the abnormal ventilation situation, uses the curve search method to complete the fan frequency regulation. The curve search method obtains the fan characteristic curve that meets the required air volume through network solution, and quickly searches in the fan characteristic curve library to obtain the adjustment frequency of the fan. The fan frequency conversion control submodule is used to adjust according to the adjustment frequency of the fan to achieve coordinated linkage to reduce the scope and degree of impact of a single fan stoppage failure on the ventilation system.

5. A method for coordinated control of wind shaft fan stoppage and lane network air volume regulation in a coal mine applied to the system according to any one of claims 1 to 4, characterized in that: The specific steps include: Step 1: The fan monitoring and early warning module monitors the fan operating parameters online. At the same time, the underground air network monitoring system monitors the ventilation parameters of the underground ventilation network branches in real time and transmits them to the surface host computer interaction submodule through the industrial Ethernet communication system for dynamic analysis and judgment of the ventilation system; Step 2: When the fan monitoring and early warning module uses the support vector machine algorithm to diagnose faults, it deeply mines abnormal information about the fan operation. If a fan failure or fan stoppage is found, the host computer interaction submodule will warn of the abnormal state of the fan and issue a fan stop alarm. Step 3: The host computer interaction submodule uses the fan collaborative control analysis module to quickly determine the causes of fan failures and wind stoppages, calls the fan operating condition characteristic curve database, analyzes the expected operating conditions of the associated fans after wind stoppage to expand the service range, and uses the expert decision generation module to formulate a linkage control plan; Step 4: Use the preset ventilation model and monitored ventilation parameters in the database to iteratively solve the ventilation network, verify it with the safety assurance air volume threshold range of the key tunnel branches, realize the advanced simulation of the adjustment plan, simulate and verify the proposed adjustment plan, and then control the ventilation sub-module in a coordinated manner. Verify the control effect through real-time feedback from tunnel wind speed monitoring, adjust the operating frequency of the associated main ventilation fan, meet the air volume demand of the expanded air supply area, and coordinate to reduce the impact range of single fan stoppage failure.

6. The method for coordinated control of ventilation shaft fan stoppage and laneway air volume regulation according to claim 5 is characterized in that: The specific steps of the linkage control scheme include: Step 3.1: Based on the logical relationship between the branches of the air distribution points in the underground ventilation network of a mine with multiple fans operating in a coordinated manner, the optimal air distribution adjustment branch is selected. After the server performs advanced simulation and safety verification on the adjustment plan, the server of the host computer interaction submodule sends the adjustment command to the underground damper control device, which adjusts the key ventilation facilities, opens the associated locking dampers, changes the ventilation network structure, and expands the service range of the associated fans. Step 3.2: After changing the ventilation network structure, the operating frequency of the ground fan needs to be adjusted. The server of the upper computer interaction submodule predicts the required air volume based on the adjusted ventilation network conditions. Specifically, the curve search method is used to complete the variable frequency adjustment of the fan. The required air volume that meets the key branches underground is obtained through the ventilation network solution iteration. The total required air volume is calculated and the fan operating conditions are quickly searched in the fan characteristic curve library to obtain the adjustment frequency. Step 3.3: After the upper computer interaction sub-module server performs advance simulation and safety verification on the adjustment plan, the server sends the adjustment command to the fan monitoring substation, which executes the adjustment of the fan operating frequency. At the same time, the server monitors the adjustment process of the ventilation network associated branches in real time and displays various ventilation parameters on the terminal in real time until the air volume requirements of the key branches are met.

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