Underground fire monitoring system and monitoring method thereof

Abstract

The invention provides an underground fire monitoring system and a monitoring method thereof, the underground fire monitoring system comprises an underground working area, two sides of the underground working area are respectively provided with an air inlet roadway and an air return roadway, the monitoring system comprises a fire detection unit, an alarm unit and a control unit, and the control unit is electrically connected with the fire detection unit and the alarm unit; the fire detection unit comprises a video acquisition module and a temperature detection module, the video acquisition module is used for acquiring and identifying an underground fire video image, and the temperature detection module is used for detecting the temperature of a fire point; the control unit comprises a video analysis module, a processing module and an execution module, the video analysis module is electrically connected with the video acquisition module, and the execution module is electrically connected with the processing module and the alarm unit. Through specific design of the monitoring system, real-time, on-line and continuous monitoring of fire in an underground working area is achieved, pictures are controllable, temperature sensing is sensitive, early warning response is fast, and safety of underground operation of a coal mine is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of coal mine safety and relates to an underground fire monitoring system and a monitoring method thereof. Background Art

[0002] Mine fire refers to fires that occur in underground tunnels, working faces, chambers, goafs and other places in coal mines. Once a mine fire accident occurs, it will cause serious personal injury and property loss. Mine fires may also induce gas and coal dust explosions, thereby further expanding the degree and scope of disasters, greatly troubling coal mine fire rescue. Coal mine fire accident prevention is the foundation of coal mine safety production. Real-time and effective detection of coal mine fires can effectively prevent fires on the one hand, and detect fires early on the other hand. Rescue can be carried out when the intensity of coal mine fires is small, the scope is relatively small, and the spread is slow, thereby reducing losses and casualties.

[0003] The existing technical solution discloses a coal mine fire detection system, including a video acquisition module, a target detection module, a data processing module, a target recognition module and a fire alarm module. The video acquisition module is composed of a front-end monitoring camera and is used to perform real-time scanning of the underground environment. The target detection module is used to detect the smoke area from the acquired video image. The data processing module is used to perform grayscale processing and image enhancement processing on the detected suspicious smoke area. The target recognition module is used to extract and recognize features of the smoke area to determine whether a fire has occurred. The fire alarm module is used to sound an alarm when a fire is detected.

[0004] The existing technical solution also discloses a method and device for detecting and preventing external fires in underground coal mines. The method includes obtaining the temperature and multiple sensor data of the underground area of ​​the coal mine, the multiple sensor data including carbon monoxide concentration, smoke data and open flame data; judging whether the temperature warning conditions are met based on the temperature; using data fusion technology to process the temperature and multiple sensor data to obtain effective feature information; and making decisions and outputting judgment results based on the logical reasoning algorithm of the adaptive DS evidence theory on the effective feature information.

[0005] However, the existing technology still has the problem that coal mine fire monitoring mainly relies on the independent setting of each monitoring point, lacks unified management, and once a fire occurs at a monitoring point, it takes a long time to check the monitoring point, delaying rescue work, and the temperature sensor is not sensitive and the early warning response is slow. Therefore, it is very important to provide a monitoring system for underground fires. Summary of the invention

[0006] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a monitoring system and a monitoring method for underground fires. In the present invention, through the specific design of the monitoring system, real-time, online and continuous monitoring of fires in underground working areas is achieved, and the screen is controllable, the temperature perception is sensitive, and the early warning response is fast, thereby improving the safety of underground coal mine operations.

[0007] To achieve this object, the present invention adopts the following technical solutions:

[0008] In a first aspect, the present invention provides a monitoring system for underground fires, comprising an underground working area, with air inlet tunnels and air return tunnels respectively arranged on both sides of the underground working area, the monitoring system comprising a fire detection unit, an alarm unit and a control unit, the control unit being electrically connected to the fire detection unit and the alarm unit respectively;

[0009] The fire detection unit includes a video acquisition module and a temperature detection module, wherein the video acquisition module is used to acquire and identify the fire video image in the well, and the temperature detection module is used to detect the temperature of the fire point;

[0010] The control unit includes a video analysis module, a processing module and an execution module. The video analysis module is electrically connected to the video acquisition module, and the execution module is electrically connected to the processing module and the alarm unit respectively.

[0011] In the present invention, through the specific design of the monitoring system, real-time, online and continuous monitoring of fires in underground working areas is achieved, and the picture is controllable, the temperature perception is sensitive, and the early warning response is fast, thereby improving the safety of underground coal mine operations.

[0012] It should be noted that the underground fire monitoring system and monitoring method provided by the present invention utilizes a video acquisition module and a temperature detection module to detect the fire point and fire trend in the underground working area, can accurately locate the fire point, and realize real-time monitoring of the spatial state distribution of the underground temperature field, thereby realizing real-time, online, continuous monitoring and early warning of the fire in the underground working area. In addition, the present invention designs sound and light alarm components at each alarm point in the coal mine, so that the early warning response is more sensitive, the safety of coal mine operations is improved, and the safety of personnel is ensured.

[0013] It should be noted that the control unit in the present invention includes a video analysis module, a processing module and an execution module, wherein the video analysis module is used to receive and analyze the image data from the video acquisition module, the processing module is used to integrate and analyze the fire point location and temperature development trend information, determine the fire situation, and send corresponding instructions to the execution module, and the execution module triggers the alarm unit to issue an alarm according to the instructions.

[0014] It should be noted that the images collected by the video acquisition module in the present invention are analyzed by the food analysis module, and the specific method may be:

[0015] The background estimation method is used to detect moving targets in the collected video, and the original background image and illumination factor are introduced into the background update model. The introduction of the original background image prevents the smoke with a relatively slow diffusion speed from being filtered out as a background image, and the introduction of the illumination factor avoids the sudden change of illumination affecting the quality of background update. In addition, through color judgment, pixels with relatively bright colors can be excluded, thereby excluding some non-smoke moving subjects, which reduces the workload of the subsequent image recognition process. Specifically, an image conversion unit and an image enhancement unit can be designed. The image grayscale unit is used to convert the detected smoke motion area into a grayscale image. The image enhancement unit performs image enhancement on the grayscale values ​​of the pixels that change the smoke motion area, thereby improving the overall recognition accuracy of the fire point.

[0016] As a preferred technical solution of the present invention, the video acquisition module includes at least one monitoring camera, and the monitoring camera is used to sense and identify the fire point.

[0017] It should be noted that the specific model of the surveillance camera in the present invention is not particularly limited, and those skilled in the art can make adaptive adjustments according to actual conditions. Among them, the surveillance camera must meet the functions of real-time recording, identifying target fire points and storage, at least one surveillance camera, for example, can be 1, 2, 3, 4, 5, etc., which are not exhaustive here, and the values ​​that meet the limited range are all within the protection scope of the present invention.

[0018] As a preferred technical solution of the present invention, the fire detection unit also includes a concentration detection module, which includes a sampling tube and a quality detection component. The two ends of the sampling tube are respectively connected to the return air duct and the quality detection component for detecting the gas concentration in the underground working area.

[0019] Preferably, the quality detection component is electrically connected to the concentration analysis module of the control unit for determining the fire trend.

[0020] Preferably, the mass detection component comprises a mass spectrometer or a chromatograph.

[0021] Preferably, a filter assembly is provided at the inlet of the sampling tube, and the filter assembly is used to filter gas impurities.

[0022] It should be noted that in the present invention, the filter assembly is arranged at the inlet of the sampling tube, that is, at the return air channel, to filter out dust in the gas entering the sampling tube, which is beneficial to improving the detection accuracy.

[0023] As a preferred technical solution of the present invention, the temperature detection module includes a distributed optical fiber temperature measurement host, a first temperature-sensitive optical fiber and a second temperature-sensitive optical fiber; the distributed optical fiber temperature measurement host is respectively connected to the first temperature-sensitive optical fiber and the second temperature-sensitive optical fiber; the distributed optical fiber temperature measurement host is electrically connected to the processing module of the control unit, and the first temperature-sensitive optical fiber and the second temperature-sensitive optical fiber extend into the underground working area from the air inlet channel and the return air channel on both sides of the underground working area, and extend along the side wall of the underground working area.

[0024] It should be noted that the present invention adopts distributed optical fiber temperature measurement to measure the real-time temperature field in the underground working area. The temperature-sensing optical fiber is resistant to radio frequency and electromagnetic interference, flame retardant and explosion-proof, can operate safely in the working area underground in the coal mine, conduct continuous monitoring, and realize real-time, online, and multi-point temperature sensing.

[0025] As a preferred technical solution of the present invention, the alarm unit includes a plurality of sound and light alarm components distributed in the underground working area, which are used to alert the personnel working in the working area.

[0026] It should be noted that when the alarm unit is arranged underground in the coal mine, the present invention divides the working area into multiple alarm point areas along its extension direction, and sets at least one sound and light alarm component in each alarm point area. According to the distance between the fire points in the working area, the sound and light alarm components in different alarm point areas are triggered to alarm, which can prompt the staff working at different positions in the underground working area to take corresponding measures. Among them, the number of sound and light alarm components can be, for example, 1, 2, 3, 4, 5, etc., which are not exhaustive here, and the values ​​that meet the limited range all fall within the protection scope of the present invention.

[0027] In a second aspect, the present invention provides a method for monitoring underground fires, wherein the method uses the underground fire monitoring system described in the first aspect to perform fire monitoring, and the method comprises:

[0028] (1) Deploy alarm units in the underground working area;

[0029] (2) The fire point is identified by the video acquisition module and fed back to the video analysis module of the control unit for video analysis to accurately determine the location of the fire point;

[0030] (3) The temperature detection module collects temperature information at different locations in the underground working area and transmits it to the processing module of the control unit. The processing module analyzes and processes the acquired data to accurately determine the ignition trend of the ignition point;

[0031] (5) The processing module integrates and analyzes the location of the fire point and the fire trend, triggering the execution module to drive the alarm unit to sound an alarm.

[0032] As a preferred technical solution of the present invention, in step (1), the deployment method of the alarm unit includes:

[0033] The underground working area is divided into alarm point areas, at least one sound and light alarm component is arranged in each alarm point area, and each sound and light alarm component is independently and electrically connected to the execution module of the control unit.

[0034] As a preferred technical solution of the present invention, in step (2), the method for the video analysis module to perform video analysis includes:

[0035] The underground working area is divided into video monitoring areas, at least one monitoring camera is arranged in each video monitoring area, and each monitoring camera is independently electrically connected to the video analysis module.

[0036] As a preferred technical solution of the present invention, in step (3), the temperature detection module detects the temperature changes at different positions along the first temperature-sensitive optical fiber and the second temperature-sensitive optical fiber based on the temperature effect of optical time-domain reflection and back Raman scattering of the optical fiber, thereby realizing the temperature detection of the hot spots in the underground working area.

[0037] As a preferred technical solution of the present invention, in step (4), the processing module analyzes and processes the collected image and temperature data to obtain the location of the fire point and the fire trend, and sends an instruction to the execution module to drive the sound and light alarm components in different alarm point areas to sound an alarm.

[0038] In the present invention, the system refers to an equipment system, a device system or a production device.

[0039] Compared with the prior art, the present invention has the following beneficial effects:

[0040] The present invention provides a monitoring system and a monitoring method for underground fires. The video acquisition module and the temperature detection module are used to detect the fire point and the fire trend in the underground working area, and the fire point can be accurately located to realize the real-time monitoring of the spatial state distribution of the underground temperature field, thereby realizing the real-time, online, and continuous monitoring and early warning of the fire in the underground working area. In addition, the present invention designs sound and light alarm components at each alarm point in the coal mine, so that the early warning reaction is more sensitive, the safety of coal mine operations is improved, and the safety of personnel is ensured. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 A schematic diagram of the structure of an underground fire monitoring system provided by a specific embodiment of the present invention;

[0042] Among them, 1-downhole working area; 2-sampling tube; 3-quality detection component; 4-filter component; 5-temperature detection module; 6-first temperature sensing optical fiber; 7-second temperature sensing optical fiber; 8-alarm unit; 9-control unit; 10-video acquisition module. DETAILED DESCRIPTION

[0043] It should be understood that, in the description of the present invention, the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0044] It should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "disposed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0045] Those skilled in the art should understand that the present invention necessarily includes necessary pipelines, conventional valves and general pump equipment for realizing a complete process, but the above content does not belong to the main inventive point of the present invention. Those skilled in the art can add layouts on their own based on the process flow and equipment structure selection, and the present invention does not make special requirements and specific limitations on this.

[0046] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0047] In a specific embodiment, the present invention provides a monitoring system for underground fires, such as Figure 1 As shown, it includes an underground working area 1, and air inlet tunnels and return air tunnels are respectively arranged on both sides of the underground working area 1. The monitoring system includes a fire detection unit, an alarm unit 8 and a control unit 9, and the control unit 9 is electrically connected to the fire detection unit and the alarm unit 8 respectively;

[0048] The fire detection unit includes a video acquisition module 10 and a temperature detection module 5. The video acquisition module 10 is used to acquire and identify the fire video image underground, and the temperature detection module 5 is used to detect the temperature of the fire point;

[0049] The control unit 9 includes a video analysis module, a processing module and an execution module. The video analysis module is electrically connected to the video acquisition module 10 , and the execution module is electrically connected to the processing module and the alarm unit 8 , respectively.

[0050] In the present invention, through the specific design of the monitoring system, real-time, online and continuous monitoring of the fire in the underground working area 1 is achieved, and the picture is controllable, the temperature perception is sensitive, and the early warning response is fast, thereby improving the safety of underground coal mine operations.

[0051] It should be noted that the underground fire monitoring system and monitoring method provided by the present invention utilizes the video acquisition module 10 and the temperature detection module 5 to detect the fire point and fire trend in the underground working area 1, and can accurately locate the fire point, realize the real-time monitoring of the spatial state distribution of the underground temperature field, and further realize the real-time, online, continuous monitoring and early warning of the fire in the underground working area 1. In addition, the present invention designs sound and light alarm components at each alarm point in the coal mine, so that the early warning reaction is more sensitive, the safety of coal mine operations is improved, and the safety of personnel is ensured.

[0052] It should be noted that the control unit 9 in the present invention includes a video analysis module, a processing module and an execution module, wherein the video analysis module is used to receive and analyze and process image data from the video acquisition module 10, the processing module is used to integrate and analyze the fire point location and temperature development trend information, determine the fire situation, and issue corresponding instructions to the execution module, and the execution module triggers the alarm unit 8 to issue an alarm according to the instructions.

[0053] It should be noted that the images captured by the video acquisition module 10 in the present invention are analyzed by the food analysis module, and the specific method may be:

[0054] The background estimation method is used to detect moving targets in the collected video, and the original background image and illumination factor are introduced into the background update model. The introduction of the original background image prevents the smoke with a relatively slow diffusion speed from being filtered out as a background image, and the introduction of the illumination factor avoids the sudden change of illumination affecting the quality of background update. In addition, through color judgment, pixels with relatively bright colors can be excluded, thereby excluding some non-smoke moving subjects, which reduces the workload of the subsequent image recognition process. Specifically, an image conversion unit and an image enhancement unit can be designed. The image grayscale unit is used to convert the detected smoke motion area into a grayscale image. The image enhancement unit performs image enhancement on the grayscale values ​​of the pixels that change the smoke motion area, thereby improving the overall recognition accuracy of the fire point.

[0055] The video acquisition module 10 includes at least one monitoring camera, which is used to sense and identify the fire point.

[0056] It should be noted that the specific model of the surveillance camera in the present invention is not particularly limited, and those skilled in the art can make adaptive adjustments according to actual conditions. Among them, the surveillance camera must meet the functions of real-time recording, identifying target fire points and storage, at least one surveillance camera, for example, can be 1, 2, 3, 4, 5, etc., which are not exhaustive here, and the values ​​that meet the limited range are all within the protection scope of the present invention.

[0057] The fire detection unit also includes a concentration detection module, which includes a sampling tube 2 and a quality detection component 3. The two ends of the sampling tube 2 are respectively connected to the return air channel and the quality detection component 3 for detecting the gas concentration in the underground working area 1.

[0058] The quality detection component 3 is electrically connected to the concentration analysis module of the control unit 9 for determining the fire trend.

[0059] The mass detection component 3 includes a mass spectrometer or a chromatograph.

[0060] A filter assembly 4 is provided at the inlet of the sampling tube 2, and the filter assembly 4 is used to filter gas impurities.

[0061] It should be noted that in the present invention, the filter assembly 4 is arranged at the inlet of the sampling tube 2, that is, at the return air channel, to filter out dust in the gas entering the sampling tube 2, which is beneficial to improving the detection accuracy.

[0062] The temperature detection module 5 includes a distributed optical fiber temperature measurement host, a first temperature sensing optical fiber 6 and a second temperature sensing optical fiber 7; the distributed optical fiber temperature measurement host is respectively connected to the first temperature sensing optical fiber 6 and the second temperature sensing optical fiber 7; the distributed optical fiber temperature measurement host is electrically connected to the processing module of the control unit 9, and the first temperature sensing optical fiber 6 and the second temperature sensing optical fiber 7 extend into the underground working area 1 from the air inlet channel and the return air channel on both sides of the underground working area 1, and extend along the side wall of the underground working area 1.

[0063] It should be noted that the present invention adopts distributed optical fiber temperature measurement to measure the real-time temperature field in the underground working area 1. The temperature-sensing optical fiber is resistant to radio frequency and electromagnetic interference, flame retardant and explosion-proof, can operate safely in the working area underground in the coal mine, perform continuous monitoring, and realize real-time, online, and multi-point temperature sensing.

[0064] The alarm unit 8 includes a plurality of sound and light alarm components distributed in the underground working area 1, and is used to alert personnel working in the working area.

[0065] It should be noted that when the alarm unit 8 is arranged underground in the coal mine, the working area is divided into multiple alarm point areas along its extension direction, and at least one sound and light alarm component is set in each alarm point area. According to the distance between the fire points in the working area, the sound and light alarm components in different alarm point areas are triggered to alarm, which can prompt the staff working at different positions in the underground working area 1 to take corresponding measures. Among them, the number of sound and light alarm components, for example, can be 1, 2, 3, 4, 5, etc., which are not exhaustive here, and the values ​​that meet the limited range all fall within the protection scope of the present invention.

[0066] In another specific embodiment, the present invention provides a method for monitoring underground fires. The method uses the above-mentioned underground fire monitoring system to perform fire monitoring, and specifically includes:

[0067] (1) Arranging an alarm unit 8 in the underground working area 1;

[0068] (2) The fire point is identified by the video acquisition module 10 and fed back to the video analysis module of the control unit 9 for video analysis to accurately determine the location of the fire point;

[0069] (3) The temperature detection module 5 collects temperature information at different locations in the underground working area 1 and transmits it to the processing module of the control unit 9. The processing module analyzes and processes the acquired data to accurately determine the ignition trend of the ignition point;

[0070] (5) The processing module integrates and analyzes the location of the fire point and the fire trend, triggering the execution module to drive the alarm unit 8 to sound an alarm.

[0071] In step (1), the deployment method of the alarm unit 8 includes:

[0072] The underground working area 1 is divided into alarm point areas, at least one sound and light alarm component is arranged in each alarm point area, and each sound and light alarm component is independently and electrically connected to the execution module of the control unit 9.

[0073] In step (2), the method for the video analysis module to perform video analysis includes:

[0074] The underground working area 1 is divided into video monitoring areas, at least one monitoring camera is arranged in each video monitoring area, and each monitoring camera is independently electrically connected to the video analysis module.

[0075] In step (3), the temperature detection module 5 detects the temperature changes at different positions along the first temperature-sensitive optical fiber 6 and the second temperature-sensitive optical fiber 7 based on the temperature effect of optical time domain reflection and back Raman scattering of the optical fiber, thereby detecting the temperature of the hot spots in the underground working area 1.

[0076] In step (4), the processing module analyzes and processes the collected image and temperature data to obtain the location of the fire point and the fire trend, and sends an instruction to the execution module to drive the sound and light alarm components in different alarm point areas to sound an alarm.

[0077] Example 1

[0078] This embodiment provides a monitoring system for underground fires, wherein:

[0079] The monitoring system includes an underground working area 1, with air intake tunnels and return air tunnels respectively arranged on both sides of the underground working area 1. The monitoring system includes a fire detection unit, an alarm unit 8 and a control unit 9, and the control unit 9 is electrically connected to the fire detection unit and the alarm unit 8 respectively; the fire detection unit includes a video acquisition module 10 and a temperature detection module 5, the video acquisition module 10 is used to acquire and identify the fire video image underground, and the temperature detection module 5 is used to detect the temperature of the fire point; the control unit 9 includes a video analysis module, a processing module and an execution module, the video analysis module is electrically connected to the video acquisition module 10, and the execution module is electrically connected to the processing module and the alarm unit 8 respectively.

[0080] The video acquisition module 10 includes three monitoring cameras, which are used to sense and identify the fire point. The alarm unit 8 includes three sound and light alarm components distributed in the underground working area 1, which are used to remind the personnel working in the working area.

[0081] The fire detection unit also includes a concentration detection module, which includes a sampling tube 2 and a quality detection component 3. The two ends of the sampling tube 2 are respectively connected to the return air lane and the quality detection component 3, which is used to detect the gas concentration in the underground working area 1. The quality detection component 3 is electrically connected to the concentration analysis module of the control unit 9, which is used to determine the fire trend; the quality detection component 3 includes a mass spectrometer or a chromatograph; a filter component 4 is provided at the inlet of the sampling tube 2, and the filter component 4 is used to filter gas impurities.

[0082] The temperature detection module 5 includes a distributed optical fiber temperature measurement host, a first temperature sensing optical fiber 6 and a second temperature sensing optical fiber 7; the distributed optical fiber temperature measurement host is respectively connected to the first temperature sensing optical fiber 6 and the second temperature sensing optical fiber 7; the distributed optical fiber temperature measurement host is electrically connected to the processing module of the control unit 9, and the first temperature sensing optical fiber 6 and the second temperature sensing optical fiber 7 extend into the underground working area 1 from the air inlet channel and the return air channel on both sides of the underground working area 1, and extend along the side wall of the underground working area 1.

[0083] In summary, the present invention provides a monitoring system and a monitoring method for underground fires, which utilizes a video acquisition module 10 and a temperature detection module 5 to detect the ignition point and ignition trend in an underground working area 1, can accurately locate the ignition point, and achieve real-time monitoring of the spatial state distribution of the underground temperature field, thereby achieving real-time, online, and continuous monitoring and early warning of fires in the underground working area 1. In addition, the present invention designs sound and light alarm components at various alarm points in the coal mine, making the early warning response more sensitive, improving the safety of coal mine operations, and ensuring personnel safety.

[0084] The above description is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Those skilled in the art should understand that any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention are within the protection scope and disclosure scope of the present invention.

Claims

1. A monitoring system for underground fires, comprising an underground working area, with air inlet tunnels and return air tunnels respectively arranged on both sides of the underground working area. It is characterized in that The monitoring system comprises a fire detection unit, an alarm unit and a control unit, wherein the control unit is electrically connected to the fire detection unit and the alarm unit respectively; The fire detection unit includes a video acquisition module and a temperature detection module, wherein the video acquisition module is used to acquire and identify the fire video image in the well, and the temperature detection module is used to detect the temperature of the fire point; The control unit includes a video analysis module, a processing module and an execution module. The video analysis module is electrically connected to the video acquisition module, and the execution module is electrically connected to the processing module and the alarm unit respectively.

2. The monitoring system according to claim 1, It is characterized in that The video acquisition module includes at least one monitoring camera, and the monitoring camera is used to sense and identify the fire point.

3. The monitoring system according to claim 1 or 2, It is characterized in that The fire detection unit also includes a concentration detection module, which includes a sampling tube and a quality detection component. The two ends of the sampling tube are respectively connected to the return air lane and the quality detection component, and are used to detect the gas concentration in the underground working area; Preferably, the quality detection component is electrically connected to the concentration analysis module of the control unit to determine the fire trend; Preferably, the mass detection component comprises a mass spectrometer or a chromatograph; Preferably, a filter assembly is provided at the inlet of the sampling tube, and the filter assembly is used to filter gas impurities.

4. The monitoring system according to any one of claims 1 to 3, It is characterized in that The temperature detection module includes a distributed optical fiber temperature measurement host, a first temperature sensing optical fiber and a second temperature sensing optical fiber; The distributed optical fiber temperature measurement host is respectively connected to the first temperature-sensitive optical fiber and the second temperature-sensitive optical fiber; The distributed optical fiber temperature measurement host is electrically connected to the processing module of the control unit. The first temperature-sensitive optical fiber and the second temperature-sensitive optical fiber extend into the underground working area from the air inlet channel and the return air channel on both sides of the underground working area respectively, and extend along the side wall of the underground working area.

5. The monitoring system according to any one of claims 1 to 4, It is characterized in that The alarm unit includes a plurality of sound and light alarm components distributed in the underground working area, which are used to remind the personnel working in the working area.

6. A method for monitoring underground fires, It is characterized in that The monitoring method adopts the underground fire monitoring system according to any one of claims 1 to 5 to perform fire monitoring, and the monitoring method comprises: (1) Deploy alarm units in the underground working area; (2) The fire point is identified by the video acquisition module and fed back to the video analysis module of the control unit for video analysis to accurately determine the location of the fire point; (3) The temperature detection module collects temperature information at different locations in the underground working area and transmits it to the processing module of the control unit. The processing module analyzes and processes the acquired data to accurately determine the ignition trend of the ignition point; (5) The processing module integrates and analyzes the location of the fire point and the fire trend, triggering the execution module to drive the alarm unit to sound an alarm.

7. The monitoring method according to claim 6, It is characterized in that In step (1), the deployment method of the alarm unit includes: The underground working area is divided into alarm point areas, at least one sound and light alarm component is arranged in each alarm point area, and each sound and light alarm component is independently and electrically connected to the execution module of the control unit.

8. The monitoring method according to claim 6 or 7, It is characterized in that In step (2), the method in which the video analysis module performs video analysis includes: The underground working area is divided into video monitoring areas, at least one monitoring camera is arranged in each video monitoring area, and each monitoring camera is independently electrically connected to the video analysis module.

9. The monitoring method according to any one of claims 6 to 8, It is characterized in that In step (3), the temperature detection module detects the temperature changes at different positions along the first temperature-sensitive optical fiber and the second temperature-sensitive optical fiber based on the temperature effect of optical time-domain reflection and back Raman scattering of the optical fiber, thereby detecting the temperature of the hot spots in the underground working area.

10. The monitoring method according to any one of claims 6 to 9, It is characterized in that In step (4), the processing module analyzes and processes the collected image and temperature data to obtain the location of the fire point and the fire trend, and sends an instruction to the execution module to drive the sound and light alarm components in different alarm point areas to sound an alarm.

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