A system for joint control and joint measurement of railway tunnel engineering ventilation safety

Abstract

This invention provides a joint control and monitoring system for ventilation safety in railway tunnel engineering. The monitoring system includes: a gas monitoring module, comprising a fixed sensor installed at a fixed location in the tunnel and a mobile sensor installed on the excavation face and work vehicle that advances with the construction progress; a fan unit, with the fan arranged at the tunnel entrance and connected to the excavation face via a tunnel ventilation belt; a power consumption monitoring module for monitoring the power consumption data of the fan unit; and a joint control and monitoring unit, which performs joint control and monitoring of the fan unit based on the data from the gas sensor and the power consumption monitoring module.

Description

Technical Field

[0001] This invention relates to the field of information and intelligent control in railway engineering, and in particular to a joint control and monitoring system for ventilation safety in railway tunnel engineering. Background Technology

[0002] With the continuous improvement of my country's transportation network, more and more long and extra-long tunnels are appearing in railway construction. The "Nine Regulations on Tunnel Construction Safety" stipulate that "toxic and harmful gases must be monitored and controlled, ventilation management must be strengthened, and construction operations exceeding concentration standards are strictly prohibited." The main toxic and harmful gas generated during tunnel excavation is methane. When methane reaches a certain concentration, it can easily cause major safety accidents such as fires. Therefore, the concentration of toxic and harmful gases in the tunnel and the power consumption of ventilation equipment should be monitored and supervised in real time.

[0003] For high-risk tunnels, the power consumption of ventilation equipment will be correlated with the concentration of toxic gases within the tunnel. A linked monitoring mechanism will be established to link power consumption with harmful gas concentrations, enabling coordinated control and early warning systems to ensure the safety of construction operations within the tunnel. The correlation between ventilation power consumption and harmful gas concentration monitoring data in high-risk tunnel projects will be studied. Based on a gas concentration monitoring module, a real-time linked monitoring system for ventilation equipment power consumption and harmful gas monitoring will be established in high-risk tunnel projects. This method ensures the safety of construction operations within the tunnel while avoiding waste of electrical resources, promoting environmental protection and energy conservation. It also enables intelligent operation of ventilation equipment through changes in power consumption and provides technical decision-making support for stable construction power supply monitoring in environments with weak infrastructure, harsh climate conditions, and poor power supply.

[0004] Furthermore, railways in complex and challenging mountainous areas are characterized by significant engineering environmental features such as complex geology and topography, harsh climate conditions, frequent mountain disasters, and fragile ecological environments. The infrastructure along these railway lines is weak, the electricity supply areas suffer from adverse weather conditions, and the power supply conditions for construction are poor, making power supply and usage management during railway construction extremely difficult. These railway projects require intelligent hardware equipment and related technologies for metering and monitoring construction power supply and usage, combined with engineering construction informatization, to establish an information platform that can display data in real time and provide decision support for construction power supply and usage management.

[0005] In the field of intelligent construction, existing technologies have vigorously promoted emerging technologies such as digitalization and the Internet, and implemented a series of building digitalization measures. The advancement of BIM (Building Information Modeling) in railway engineering projects has largely achieved intelligent and refined management of the power consumption of specific engineering machinery and equipment. Research on energy conservation and consumption reduction in engineering cost control has yielded some results. For example, efforts have been made to promote the deep integration of Intelligent Traffic Systems (ITS), intelligent robots, and human control. Regarding power supply and consumption in engineering projects, researchers have successively carried out research on intelligent power supply and refined power consumption. Due to the significant impact of electricity consumption during construction, the need for power energy consumption management is becoming increasingly important. Summary of the Invention

[0006] In order to overcome and mitigate the above-mentioned shortcomings of the existing technology and meet the needs of engineering practice, this application proposes a joint control and monitoring system for ventilation safety in railway tunnel engineering.

[0007] According to one aspect of this application, a joint control and monitoring system for ventilation safety in railway tunnel engineering is proposed. The monitoring system includes: a gas monitoring module comprising a fixed sensor located at a fixed position in the tunnel and a mobile sensor installed on the excavation face and work vehicle that advances with the construction progress; a fan unit comprising a fan arranged at the tunnel entrance and connected to the excavation face via a tunnel ventilation belt; a power consumption monitoring module for monitoring the power consumption data of the fan unit; and a joint control and monitoring unit for performing joint control and monitoring of the fan unit based on the data from the gas sensor and the power consumption monitoring module.

[0008] The joint control and monitoring system selects one of the following operating modes based on the different concentrations of the predetermined gas monitored by the gas monitoring module and / or the electricity consumption monitored by the electricity consumption monitoring module:

[0009] In the normal mode, the fans in the fan unit operate at low speed, continuously supplying fresh air to the tunnel;

[0010] Excessive speed mode: In this mode, all fans are activated and their speed is increased.

[0011] Hazard mode: In this mode, all live equipment at the working face is shut off, an evacuation warning is issued, all fans are started and run at maximum speed.

[0012] In energy-saving mode, when the concentration of the predetermined gas is lower than the predetermined energy-saving value, the number of fans is turned off or the fan operating speed is reduced.

[0013] The gas monitoring module and / or the fan in the fan unit are all equipped with a position identification mark and send the relevant information to the joint control and monitoring unit.

[0014] The joint control and monitoring unit determines the concentration of toxic and harmful gases and / or the power consumption of the fans in each zone based on the location identification marks in the received monitoring data, thereby obtaining environmental information at different locations in the tunnel;

[0015] Different working modes are activated at different locations;

[0016] The power consumption monitoring module is a smart meter. The smart meter collects the power consumption of the wind turbine in real time or at predetermined time intervals and transmits the power data to the joint control and measurement unit. The joint control and measurement unit counts the duration and power consumption of each wind turbine at different speeds, and compares the power consumption of the motor at low and high speeds. Based on the highest power consumption of all wind turbines monitored, the power of the cable line and power supply equipment is planned.

[0017] Preferably, the wind turbine unit is controlled through a first wind turbine control loop and a second control loop. The first control loop is a direct closed-loop connection between the controller of the wind turbine unit and the gas monitoring module, and the wind turbine unit controls the wind turbine based on the monitoring data of the gas monitoring module. The second control loop is a control loop in which the controller of the wind turbine unit receives control signals from the joint control and monitoring unit, and the joint control and monitoring unit issues control commands to the wind turbine unit based on the data analysis of the power consumption monitoring module.

[0018] In one specific embodiment of the joint control and monitoring system according to this disclosure, the gas monitoring module, fan unit, electrical monitoring module and joint control and monitoring unit all have explosion-proof performance or are equipped with explosion-proof devices.

[0019] By applying the technical solution according to this disclosure, the beneficial effects can be obtained at least as follows:

[0020] The system monitors the concentration of toxic and harmful gases and electricity consumption to obtain environmental information at different locations within the tunnel. When the concentration of toxic and harmful gases reaches a certain warning threshold, the joint control and monitoring system will issue an alert and automatically activate different operating modes, such as increasing the number of ventilation devices or increasing their operating speed, to ensure the safety of construction personnel. Simultaneously, the system will also monitor changes in electricity consumption and the concentration of toxic and harmful gases. When the gas concentration falls below a certain standard value, the system will automatically reduce the number of ventilation devices or decrease their operating speed, activating an energy-saving mode. Attached Figure Description

[0021] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, are not intended to limit the scope of the invention. In the drawings:

[0022] Figure 1 This is a schematic diagram of a preferred embodiment of the joint control and monitoring system for ventilation safety in railway tunnel engineering according to the present disclosure;

[0023] Figure 2 This is a control diagram illustrating the joint control method in a joint control and testing system based on the content of this disclosure;

[0024] Figure 3 This is a schematic diagram illustrating the working principle of the joint control and testing center unit in the joint control and testing system based on the content of this disclosure. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the embodiments of this application will be further described in detail below with reference to the accompanying drawings. Here, the illustrative embodiments of the present invention and their descriptions are used to explain the present invention, but are not intended to limit the present invention.

[0026] It should be noted that, in order to avoid obscuring the invention with unnecessary details, only the structures and / or processing steps closely related to the solution according to the invention are shown in the accompanying drawings, while other details that are not closely related to the invention are omitted.

[0027] It should be emphasized that the term "including / comprises / has" as used herein refers to the presence of a feature, element, step, or component, but does not exclude the presence or addition of one or more other features, elements, steps, or components.

[0028] According to one aspect of this application, a joint control and monitoring system for ventilation safety in railway tunnel engineering is proposed. The monitoring system includes: a gas monitoring module, which includes fixed sensors installed at fixed locations in the tunnel and mobile sensors installed on the excavation face and work vehicle that advance with the construction progress; a fan unit, which includes fans arranged at the tunnel entrance and connected to the excavation face through tunnel ventilation belts; a power consumption monitoring module for monitoring the power consumption data of the fan unit; and a joint control and monitoring unit, which performs joint control and monitoring of the fan unit based on the data from the gas sensors and the power consumption monitoring module.

[0029] Preferably, the wind turbine unit is controlled through a first wind turbine control loop and a second control loop. The first control loop is a direct closed-loop connection between the wind turbine unit's controller and the gas monitoring module, with the wind turbine unit controlling the turbine based on monitoring data from the gas monitoring module. The second control loop involves the wind turbine unit's controller receiving control signals from a joint control and monitoring unit, which then issues control commands to the wind turbine unit based on data analysis from the power consumption monitoring module.

[0030] In one specific embodiment of the joint control and monitoring system according to this disclosure, the joint control and monitoring system selects one of the following operating modes based on the different concentrations of a predetermined gas monitored by the gas monitoring module and / or the electricity consumption monitored by the electricity consumption monitoring module:

[0031] In the normal mode, the fans in the fan unit operate at low speed, continuously supplying fresh air to the tunnel;

[0032] Excessive speed mode: In this mode, all fans are activated and their speed is increased.

[0033] Danger mode: In this mode, all live equipment at the working face is shut off, an evacuation warning is issued, and all fans are started and run at maximum speed.

[0034] In energy-saving mode, when the concentration of the predetermined gas is lower than the predetermined energy-saving value, the number of fans is turned off or the fan operating speed is reduced.

[0035] The gas monitoring module, fan unit, electrical monitoring module, and joint control and measurement unit all have explosion-proof performance or are equipped with explosion-proof devices. Explosion-proof devices may be, for example, explosion-proof baffles or protective covers.

[0036] In one specific embodiment of the joint control and monitoring system according to this disclosure, the gas monitoring module and / or the fans in the fan unit are all pre-set with position identification marks and send relevant information to the joint control and monitoring unit.

[0037] The joint control and monitoring unit determines the concentration of toxic and harmful gases and / or the power consumption of the fans in each zone based on the location identification marks in the received monitoring data, thereby obtaining environmental information at different locations in the tunnel;

[0038] Different working modes are activated in different locations.

[0039] In one specific embodiment of the joint control and monitoring system according to this disclosure, preferably, the power monitoring module is a smart meter. The smart meter collects the power consumption of the fan in real time or at predetermined time intervals and transmits the power data to the joint control and monitoring unit. The joint control and monitoring unit counts the duration and power consumption of each fan under different speed conditions, and compares the power consumption of the motor at low speed and high speed.

[0040] In one specific embodiment of the joint control and monitoring system according to this disclosure, the gas monitoring module includes toxic and harmful gas sensors installed at multiple locations on the working face and the lining trolley.

[0041] In one specific embodiment of the joint control and monitoring system according to this disclosure, the joint control and monitoring unit performs joint control and monitoring of the wind turbine unit based on data from the gas monitoring module and the power consumption monitoring module. The joint control and monitoring unit includes a query module, a storage module, an early warning module, and a data analysis module.

[0042] In one specific embodiment of the joint control and monitoring system according to this disclosure, the gas monitoring module may also include toxic and hazardous gas sensors arranged on the tunnel sidewall, depending on site requirements. Alternatively, multiple toxic and hazardous gas sensors may be arranged only at the excavation work face and on the work vehicle.

[0043] In one specific embodiment of the joint control and monitoring system according to this disclosure, the fan unit includes a variable frequency fan, which is installed at the tunnel entrance and connected to the tunnel construction face via a wind belt. The controller of the variable frequency fan can change the voltage and frequency of the fan according to the concentration of toxic and harmful gases, thereby controlling the fan speed and air volume.

[0044] In one specific embodiment of the joint control and monitoring system according to this disclosure, the joint control and monitoring system is configured to activate an over-limit mode when the gas concentration exceeds the following preset values: methane (CH4) < 1%, carbon monoxide (CO) < 24 ppm, carbon dioxide (CO2) < 1.5%, and oxygen content < 20%. When the methane (CH4) concentration is ≥ 5%, a danger mode is activated.

[0045] For example, Figure 1 In one specific embodiment of the joint control and monitoring system shown, the monitoring system includes: a gas monitoring module, which includes a fixed sensor 110 installed at a fixed location in the tunnel and a mobile sensor 120 installed on the excavation work face and work vehicle that are continuously advancing with the construction progress; a fan unit 200, whose fans are arranged along the length of the tunnel and connected to the excavation work face through a tunnel ventilation belt 300; an electricity consumption monitoring module 400 for monitoring the electricity consumption data of the fan unit; and a joint control and monitoring unit 500, which performs joint control and monitoring of the fan unit based on the data from the gas sensor and the electricity consumption monitoring module.

[0046] The gas monitoring module may include, for example, gas sensors mounted on the tunnel sidewalls. These sensors can be wired or wireless, including those at fixed locations within the tunnel and those installed on the excavation face and work vehicles as construction progresses. The ventilation units can be connected to the excavation face via tunnel ventilation belts; the ventilation units are arranged along the length of the tunnel. Smart meters can be used to monitor the power consumption of the ventilation units. These smart meters, connected to the ventilation units, enable remote meter reading and intelligent monitoring of the power consumption of equipment such as the ventilation units. This achieves the beneficial effects of real-time linkage and energy conservation, while also providing a reference for power supply decisions during construction. For example, the power of cable lines and power supply equipment can be planned based on the highest power consumption of all monitored ventilation units.

[0047] Furthermore, according to a specific embodiment of the joint control and monitoring system of this application, for example, during the excavation of a long tunnel in a complex and challenging mountainous area, toxic and harmful gas monitoring sensors are installed to monitor the concentration of toxic and harmful gases generated during construction, such as methane (CH4), carbon monoxide (CO), carbon dioxide (CO2), hydrogen sulfide, sulfur dioxide, and nitrogen dioxide. Simultaneously, an O2 sensor is installed to monitor O2 concentration. Different types of sensors can be installed on the tunnel face and the lining trolley, maintaining a certain safe excavation distance between the tunnel face and the lining trolley, allowing simultaneous monitoring of gas concentrations at two locations within a certain distance, especially for comparing sudden changes in gas concentration at the tunnel face. As the tunnel is excavated, the gas sensors move forward along with the tunnel face and the lining trolley. The gas concentration signals collected by the sensors are transmitted to the joint monitoring and control center via wireless networks such as Bluetooth or Wi-Fi.

[0048] The term "working face," also known as the tunnel face, is a term used in tunnel construction. It refers to the working face that is continuously advanced during tunnel excavation (in coal mining, mining, or tunnel engineering). It is not a fixed face; the excavation face includes the working face, sidewall face, and arch face.

[0049] Different types and models of gas sensors can be installed on the tunnel face and the lining trolley. A certain safe excavation distance is maintained between the tunnel face and the lining trolley. Gas concentrations at two locations at a certain distance can be monitored simultaneously, especially the sudden changes in gas concentration at the tunnel face can be compared.

[0050] Lining trolleys used in tunnel construction are essential equipment for secondary lining in tunnel construction, used for constructing the concrete lining of the tunnel's inner wall. Concrete lining trolleys are indispensable in secondary lining during tunnel construction, and mainly include simple lining trolleys, fully hydraulic automatic walking lining trolleys, and grid-type lining trolleys. Fully hydraulic lining trolleys can be further divided into side-top arch type, full-circular needle beam type, bottom-form needle beam type, and full-circular through-type, etc. In hydraulic tunnel and bridge construction, lifting slipform, jacking slipform, and flipping formwork are also commonly used.

[0051] Preferably, a smart meter can be installed on the tunnel ventilation fan circuit to periodically collect the fan's power consumption and transmit the data to the joint control and monitoring unit. Through analysis and calculation, the unit can statistically analyze the duration and power consumption of the fan at different speeds, and dynamically display the energy-saving effect of installing the variable frequency fan by comparing power consumption at low and high speeds. The fan power consumption and analysis results can then be pushed to relevant terminal devices such as desktop computers or mobile terminals for real-time viewing by management personnel, providing auxiliary decision-making for toxic and harmful gas monitoring and tunnel excavation. Furthermore, the joint control and monitoring unit can also provide data output, storage, query, and analysis functions. Figure 3 The schematic diagram of one embodiment of the joint control and monitoring unit illustrates that the unit receives data from the gas monitoring module, smart meter, and variable frequency fan unit. After summarizing and analyzing the data, it outputs the data, providing functions such as storage, query, and analysis. Simultaneously, based on the analysis and query results, it can feed back to the gas monitoring module, smart meter, and variable frequency fan unit, for example, to the operating controllers or preset parameter adjustments of the gas monitoring module, smart meter, and variable frequency fan unit.

[0052] For example, during normal tunnel excavation, the joint control and monitoring system operates in normal mode, with the ventilation fan running at low speed, continuously supplying fresh air to the tunnel. When the concentration of toxic or harmful gases exceeds the standard during excavation, the joint control and monitoring system switches to exceedance mode, activating the ventilation fan control circuit and increasing the fan speed. For instance, when the methane (CH4) concentration is ≥1%, the fan speed will increase if the concentration is higher than the warning value; when the methane (CH4) concentration is <1%, the fan speed will decrease. When the methane concentration is ≥5%, the joint control and monitoring system switches to danger mode, activating the methane-electricity interlock function, cutting off all energized equipment at the tunnel face, alerting workers to evacuate immediately, and simultaneously starting the ventilation fan at maximum speed.

[0053] Figure 2 This diagram illustrates a control schematic of an example of the joint control and monitoring method in the joint control and monitoring system of this disclosure. In each step shown, the joint control and monitoring unit collects data such as the power consumption, wind speed, and gas concentration of the fan; based on preset values, it determines whether the concentration of toxic and harmful gases exceeds the safety limit. If it exceeds the safety limit, the fan operates at high frequency, high speed, and high power. If the concentration of toxic and harmful gases is below the safety limit, the fan operates at low speed. After a predetermined fan operation time, the relevant data is read again to determine whether the concentration of toxic and harmful gases is below the safety limit; if it is, the fan operates at low speed. A smart meter collects the power consumption data of the fan operation and transmits it to the joint control and monitoring unit. The fan can be, for example, a DC inverter fan or other fans whose power and airflow can be controlled.

[0054] The fans in the ventilation unit can be evenly distributed along both sides of the tunnel along its length. Furthermore, the variable frequency fans in the unit can be installed at the tunnel entrance, connected to the tunnel face via air ducts. This not only removes toxic and harmful gases from the tunnel but also supplies fresh air. The variable frequency fans can control their voltage and frequency based on the concentration signal of the toxic and harmful gases, thereby controlling the fan speed and airflow.

[0055] Variable frequency drives (VFDs) can be installed at the tunnel entrance and connected to the tunnel face via air ducts. They can not only exhaust toxic and harmful gases from the tunnel but also supply fresh air. The VFD controls the fan's voltage and frequency based on the concentration of toxic and harmful gases, thereby controlling the fan's speed and airflow. During normal excavation, the fan operates at low speed, continuously supplying fresh air to the tunnel. When the concentration of toxic and harmful gases exceeds the standard during excavation, the fan control circuit is activated, increasing the fan speed.

[0056] The joint control and monitoring unit collects the concentration and corresponding location of toxic and harmful gases. By setting different gas concentration thresholds, it outputs early warning and alarm signals and controls the fan circuit to start the fan or increase its speed. Smart meters collect real-time data on the fan's power consumption, reflecting the fan's power usage and indirectly indicating the concentration monitoring status. The safety standards for toxic and harmful gas concentrations are: CH4 < 1%, carbon monoxide (CO) < 24 ppm, and carbon dioxide (CO2) < 1.5%. To ensure the safety of on-site personnel, the oxygen content must be > 20%.

[0057] During tunnel excavation, toxic and harmful gases are mainly generated at the tunnel face and the excavation interface without secondary lining. Various toxic and harmful gas sensors are installed at the tunnel face and on the lining trolley, moving with the excavation and lining trolley. The linkage monitoring and control center identifies which sensor the received signal originates from, monitoring the concentration of toxic and harmful gases and electricity consumption to obtain environmental information at different locations within the tunnel. When the concentration of toxic and harmful gases reaches a certain warning threshold, the linkage monitoring and control center issues an alert, and the system automatically activates more ventilation equipment or increases its operating speed, thereby monitoring changes in electricity consumption and toxic and harmful gas concentrations. When the gas concentration falls below a certain standard value, the system automatically reduces the number of ventilation devices or decreases their operating speed. For high-risk tunnels, the electricity consumption of exhaust equipment is correlated with the concentration of toxic gases within the tunnel, establishing a linkage monitoring mechanism between electricity consumption and harmful gas concentration. This mechanism enables linked control and early warning of electricity consumption and harmful gas concentrations, ensuring the safety of construction operations within the tunnel.

[0058] The implementation of the technical solution in this application can help promote the informatization of railway construction, stabilize various infrastructure construction tasks, practice the integration of "informatization + infrastructure", and integrate with the existing smart grid to provide data support and underlying information for comprehensive solutions.

[0059] The foregoing disclosure does not limit the implementation of this new product and / or method in other forms. Those skilled in the art will utilize this important information to modify the foregoing to achieve similar implementations. However, all modifications or alterations based on this new product are subject to reserved rights.

[0060] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the protection scope of the present invention.

Claims

1. A joint control and monitoring system for ventilation safety in railway tunnel engineering, characterized in that, The joint control and testing system includes: The gas monitoring module includes a fixed sensor set at a fixed location in the tunnel and a mobile sensor installed on the excavation face and work vehicle that are constantly advancing with the construction progress. A ventilation unit, comprising a fan arranged at the tunnel entrance, the fan being connected to the excavation work face via a tunnel ventilation belt; A power consumption monitoring module for monitoring the power consumption data of the wind turbine unit; A joint control and testing unit, which performs joint control and testing on the wind turbine unit based on the data from the gas monitoring module and the power consumption monitoring module; The joint control and monitoring system selects one of the following operating modes based on the different concentrations of the predetermined gas monitored by the gas monitoring module and / or the electricity consumption monitored by the electricity consumption monitoring module: In the normal mode, the fans in the fan unit operate at low speed, continuously supplying fresh air to the tunnel; Excessive speed mode: In this mode, all fans are activated and their speed is increased. Hazard mode: In this mode, all live equipment at the working face is shut off, an evacuation warning is issued, all fans are started and run at maximum speed. In energy-saving mode, when the concentration of the predetermined gas is lower than the predetermined energy-saving value, the number of fans is turned off or the fan operating speed is reduced. The gas monitoring module and / or the fan in the fan unit are all equipped with a position identification mark and send the relevant information to the joint control and monitoring unit. The joint control and monitoring unit determines the concentration of toxic and harmful gases and / or the power consumption of the fans in each zone based on the location identification marks in the received monitoring data, thereby obtaining environmental information at different locations in the tunnel; Different working modes are activated at different locations; The power consumption monitoring module is a smart meter. The smart meter collects the power consumption of the wind turbine in real time or at predetermined time intervals and transmits the power data to the joint control and measurement unit. The joint control and measurement unit counts the duration and power consumption of each wind turbine at different speeds, and compares the power consumption of the motor at low and high speeds. Based on the highest power consumption of all wind turbines monitored, the power of the cable line and power supply equipment is planned.

2. The joint control and testing system according to claim 1, characterized in that, The wind turbine unit is controlled through a first control loop and a second control loop. The first control loop is a direct closed-loop connection between the controller of the wind turbine unit and the gas monitoring module. The wind turbine unit controls the wind turbine based on the monitoring data of the gas monitoring module. The second control loop is where the controller of the wind turbine receives control signals from the joint control and monitoring unit, and the joint control and monitoring unit issues control commands to the wind turbine based on data analysis of the power consumption monitoring module.

3. The joint control and testing system according to claim 1, characterized in that, The gas monitoring module, fan unit, power consumption monitoring module, and joint control and measurement unit all have explosion-proof performance or are equipped with explosion-proof devices.

4. The joint control and testing system according to claim 3, characterized in that, The gas monitoring module includes toxic and harmful gas sensors installed at multiple locations on the working face and lining trolley.

5. The joint control and testing system according to claim 4, characterized in that, The joint control and monitoring unit performs joint control and monitoring of the wind turbine unit based on data from the gas monitoring module and the power consumption monitoring module. The joint control and monitoring unit includes a query module, a storage module, an early warning module, and a data analysis module.

6. The joint control and testing system according to claim 5, characterized in that, The gas monitoring module includes toxic and harmful gas sensors evenly arranged on the tunnel sidewall.

7. The joint control and testing system according to claim 6, characterized in that, The fan unit includes a variable frequency fan, which is installed at the tunnel entrance and connected to the tunnel construction face via a wind belt. The controller of the variable frequency fan can change the voltage and frequency of the fan according to the concentration of toxic and harmful gases, thereby controlling the fan speed and air volume.

8. The joint control and testing system according to claim 7, characterized in that, The joint control and monitoring system is configured to activate an exceedance mode when the gas concentration exceeds the following preset values: Methane (CH4) <1%, carbon monoxide (CO) <24ppm, carbon dioxide (CO2) <1.5%, oxygen content <20%; When the concentration of methane gas (CH4) is ≥5%, the hazard mode is activated.

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