Intelligent management and control platform for coal mine fire early warning assistant defense joint control

Abstract

The invention provides a coal mine fire early warning assistant defense joint control intelligent management and control platform, and relates to the technical field of coal mine safety detection. The platform is applied to a goaf equipped with a nitrogen making machine, and comprises a data acquisition layer, a data processing layer, a communication control layer, a monitoring and early warning layer and a data visualization layer, the platform collects the fluid flow in a closed pipeline in a goaf, the environment temperature of the goaf, the pressure of different working faces in a coal mine and the pressure of the position where each valve of the nitrogen making machine is located in real time, integrates all the collected data, compares and analyzes the integrated data with a set threshold value range, and if the analysis result is normal, the nitrogen making machine is started. If yes, the current operation state of the nitrogen making machine in the goaf is maintained; if the analysis result is abnormal, the nitrogen making machine is controlled to open a valve to inject nitrogen into the goaf for fire extinguishing until the analysis result becomes a normal position, and nitrogen injection is automatically stopped. The spontaneous combustion risk of the goaf can be effectively prevented and controlled, and the overall safety management level of a coal mine can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of coal mine safety detection, and in particular to an intelligent management and control platform for coal mine fire early warning, joint prevention and control. Background Art

[0002] Coal mine fire is a common type of accident, usually occurring in underground tunnels, working faces, chambers, goafs and other locations in coal mines. Coal mine fire accidents may affect coal mine production, even cause personal injury and property loss, and may also cause gas and coal dust explosions, resulting in environmental damage and pollution. Therefore, fire prevention and timely handling are crucial for safe production in coal mines. The goaf is the area where coal is most likely to spontaneously ignite underground in coal mines, accounting for more than 60% of the total number of spontaneous combustion of coal. The goaf is a caving space with developed cracks and coal residues. Oxygen enters the goaf to oxidize the coal and release heat, but the heat cannot be taken away in time by the convection heat exchange and surface heat conduction generated by air leakage, causing the temperature to continue to rise and lead to fire.

[0003] In recent years, as intelligent mine construction has gradually become a new direction for mine construction, the intelligent monitoring and early warning technology for mine fires has made significant progress, but there are still some shortcomings. For example, the method of monitoring and early warning of mine fires by building early warning indicator systems and models focuses on laboratory simulation experiments. It is often difficult to effectively simulate the complexity of the actual air supply conditions and air leakage conditions in coal mines, which makes it difficult to effectively associate the characteristics of coal spontaneous combustion with the site. Some methods that can be tested on the spot have the problem of high cost when applied on the spot. In addition, the existing monitoring methods are mainly focused on the determination of some environmental dangerous states or disaster precursors, and there are still many factors that lack corresponding monitoring and detection methods. Many parameters on the coal mine site lack effective monitoring methods, and continuous dynamic monitoring has not been achieved. At this stage, they mainly rely on manual measurement, and the efficiency of information generation is low. Summary of the invention

[0004] In view of the above-mentioned deficiencies in the prior art, the present invention proposes a coal mine fire early warning, joint prevention and control intelligent management and control platform, which aims to improve the safety and fire prevention and extinguishing capabilities of coal mines.

[0005] The invention proposes a coal mine fire early warning, joint prevention and control intelligent management and control platform, which is applied to goafs equipped with nitrogen generators. The platform includes: a data acquisition layer, a data processing layer, a communication control layer, a monitoring and early warning layer, and a data visualization layer;

[0006] The data acquisition layer is used to collect in real time the fluid flow in the closed pipeline in the goaf, the ambient temperature of the goaf, the pressure of different working faces in the coal mine, and the pressure at the location of each valve of the nitrogen generator, and transmit all the collected data to the data processing layer and the data visualization layer;

[0007] The data processing layer is used to accumulate and calculate all collected fluid flow rates, and respectively integrate all collected ambient temperatures, pressures of different working surfaces in the coal mine, and pressures at the locations of valves of the nitrogen generator, and then transmit the integrated fluid flow rates, ambient temperatures, and pressures at each location to the communication control layer;

[0008] The communication control layer is used to store the integrated fluid flow, ambient temperature and pressure at each position and transmit them to the monitoring and early warning layer, and receive control instructions from the monitoring and early warning layer, and adjust the fluid flow in the closed pipeline in the goaf, the ambient temperature of the goaf, the pressure of different working faces in the coal mine, and the pressure at the position of each valve of the nitrogen generator by controlling the valve of the nitrogen generator in the goaf according to the control instructions;

[0009] The monitoring and early warning layer is used to select any one or more data of the integrated fluid flow, ambient temperature and pressure at each position according to the query conditions input by the user, and compare and analyze the selected data with the set threshold range. If the analysis result is normal, the current operating state of the nitrogen generator in the goaf is maintained; if the analysis result is abnormal, a fire alarm message is issued and a control instruction is issued to the monitoring and early warning layer to control the nitrogen generator to open the valve to inject nitrogen into the goaf to extinguish the fire until the analysis result becomes a normal position, and the nitrogen injection is automatically stopped;

[0010] The data visualization layer is used to display in real time the collected fluid flow in the closed pipeline in the goaf, the ambient temperature of the goaf, the pressure of different working faces in the coal mine, the pressure at the location of each valve of the nitrogen generator, the opening and position information of each valve in the nitrogen generator, and the historical monitoring data and fire alarm information stored in the communication control layer;

[0011] The data acquisition layer includes: a mine intrinsically safe flow meter, a mine flameproof and intrinsically safe temperature sensor, and a mine flameproof pressure transmitter; wherein the mine intrinsically safe flow meter is installed in a closed pipeline of a coal mine; the mine flameproof and intrinsically safe temperature sensor is vertically suspended at a position where the airflow is stable above the tunnel; the mine flameproof pressure transmitter is installed on different working surfaces in the coal mine and at the locations of valves of the nitrogen generator;

[0012] The mine intrinsically safe flow meter is used to collect the fluid flow in the closed pipeline in the goaf in real time and transmit it to the data processing layer; the fluid flow includes: flow percentage, instantaneous flow and cumulative amount;

[0013] The mine flameproof and intrinsically safe temperature sensor uses optical fiber temperature measurement technology to monitor the ambient temperature in the goaf in real time and transmit it to the data processing layer;

[0014] The flameproof pressure transmitter for mining uses sensing elements to monitor the pressure of different working surfaces in the coal mine and the pressure of each valve position of the nitrogen generator in real time, and transmits the pressure to the data processing layer;

[0015] The data processing layer includes: an intelligent flow totalizer and a multi-channel data acquisition instrument;

[0016] The intelligent flow totalizer is used to receive all collected fluid flows, perform cumulative calculations on all fluid flows and transmit them to the communication control layer;

[0017] The multi-channel data acquisition instrument is used to respectively receive, record, integrate and display all the collected ambient temperatures, pressures of different working surfaces in the coal mine and pressures at the locations of valves of the nitrogen generator, and transmit the integrated ambient temperatures, pressures of different working surfaces in the coal mine and pressures at the locations of valves of the nitrogen generator to the communication control layer;

[0018] The communication control layer includes: a serial port server and a mine-use flameproof and intrinsically safe control box;

[0019] The serial port server is used to realize the transmission of data between the data processing layer and the mine flameproof and intrinsically safe control box and the transmission of control instructions between the mine flameproof and intrinsically safe control box and the monitoring and early warning layer respectively;

[0020] The mine-used explosion-proof and intrinsically safe control box is used to store the integrated fluid flow, ambient temperature and pressure at each position, and transmit them to the monitoring and early warning layer; it is used to receive control instructions from the monitoring and early warning layer, and to adjust the fluid flow in the closed pipeline in the goaf by controlling the valve of the nitrogen generator in the goaf according to the control instructions, thereby adjusting the ambient temperature of the goaf, the pressure of different working faces in the coal mine and the pressure at the position of each valve of the nitrogen generator.

[0021] The beneficial effects of adopting the above technical solution are:

[0022] The present invention integrates multiple traditional independent devices to design a unified coal mine fire early warning, joint prevention and control intelligent management and control platform, that is, to build a nitrogen generator-goaf area intelligent monitoring system, wherein the platform has the following advantages:

[0023] The platform of the present invention can monitor key parameters such as temperature and oxygen concentration in the goaf in real time, and automatically adjust the operating status of valves, nitrogen generators and other equipment according to the monitored data to maintain environmental stability in the goaf and prevent spontaneous combustion. In addition, the platform of the present invention improves the accuracy of predicting future spontaneous combustion risks by storing historical monitoring data and performing long-term data accumulation and analysis.

[0024] The platform of the present invention helps to reduce energy consumption and operating costs by precisely controlling nitrogen injection and ventilation.

[0025] The platform of the present invention uses data calculation models to assist managers in making more scientific and reasonable fire prevention and extinguishing decisions, and can quickly initiate emergency plans when abnormal situations are detected to reduce potential safety risks. The platform of the present invention is designed with an intuitive operation interface, allowing operators to easily manage and monitor the entire system.

[0026] The platform of the present invention integrates multiple traditional independent devices to form a unified control platform, and can automatically identify and adjust the device status by introducing automation technology to achieve intelligent risk management. The platform of the present invention can achieve remote monitoring and control through network connection, which improves the flexibility and efficiency of management.

[0027] The platform of the present invention meets the strict regulations and requirements for safe production in coal mines, has application value, and the application of the platform of the present invention can significantly improve the safety level of coal mines and reduce fire accidents caused by spontaneous combustion.

[0028] In summary, the coal mine fire early warning, joint prevention and control intelligent management and control platform is an efficient and intelligent coal mine safety management system, which prevents fires by monitoring and controlling the gas environment in the goaf and adjusting the gas environment through nitrogen generators and other equipment. It can not only effectively prevent and control the risk of spontaneous combustion in the goaf, but also improve the overall safety management level of coal mines. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a structural schematic diagram of a coal mine fire early warning, joint prevention and joint control intelligent management and control platform in this implementation mode;

[0030] Figure 2 This is a communication diagram of the nitrogen generator-goaf intelligent monitoring system in this embodiment. DETAILED DESCRIPTION

[0031] In order to facilitate the understanding of the present application, the specific embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings and embodiments. The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thoroughly understood.

[0032] In this embodiment, since the goaf is a high-risk area for coal mine fires, reducing the oxygen content by injecting a certain amount of nitrogen into the oxidation zone or fire zone of the goaf using a nitrogen generator is one of the effective means to prevent and control coal mine fires. The nitrogen generator is used to reduce the oxygen content in the oxidation zone or fire zone of the goaf to below 5%, reducing the possibility of gas explosion, while reducing the effect of air leakage, reducing the combustion intensity, preventing the spontaneous heating and spontaneous combustion of coal, and achieving the purpose of fire prevention and suppression of gas explosion.

[0033] A coal mine fire early warning, joint prevention and control intelligent management and control platform in this embodiment, such as Figure 1 As shown, the platform is applied to the goaf equipped with nitrogen generators. The platform includes: data acquisition layer, data processing layer, communication control layer, monitoring and early warning layer and data visualization layer.

[0034] The data acquisition layer is used to collect in real time the fluid flow in the closed pipeline in the goaf, the ambient temperature of the goaf, the pressure of different working faces in the coal mine, and the pressure at the location of each valve of the nitrogen generator, and transmit all the collected data to the data processing layer and the data visualization layer.

[0035] The data acquisition layer includes: a mine-used intrinsically safe flow meter, a mine-used flameproof and intrinsically safe temperature sensor, and a mine-used flameproof pressure transmitter.

[0036] The mine intrinsically safe flow meter is installed in the closed pipeline of the coal mine, and is used to collect the fluid flow in the closed pipeline in the goaf in real time and transmit it to the data processing layer; the fluid flow includes: flow percentage, instantaneous flow and cumulative amount.

[0037] In this embodiment, the intrinsically safe flowmeter for mining is an instrument for measuring fluid flow, which has intrinsic safety characteristics and can measure the volume flow of conductive liquids in closed pipes. It is suitable for places with explosion hazards in coal mines. The sensor in the intrinsically safe flowmeter for mining is used to detect the flow signal, that is, to measure the induced electromotive force, and to process the data to obtain the accurate fluid flow, and then convert the fluid flow into a digital signal for display through a converter. The converter uses a high-performance microprocessor and a three-line LCD with backlight display, which can simultaneously display the flow percentage, instantaneous flow and cumulative amount. The intrinsically safe flowmeter for mining adopts multi-pulse technology, signal digital processing technology and error correction technology to make the flow measurement more accurate and reliable. At the same time, the intrinsically safe flowmeter for mining can measure various corrosive and non-corrosive liquids such as highly corrosive liquids such as acids, alkalis, and salts, heavy turbidity coal slurry or slurry, and is suitable for a variety of industrial environments. In this embodiment, the intrinsically safe flowmeter for mining is used to monitor the flow of nitrogen in the goaf in real time to ensure that the oxygen content in the goaf is stable within a safe range.

[0038] The mine flameproof and intrinsically safe temperature sensor is vertically suspended at a position where the wind flow is stable above the tunnel, and is used to monitor the ambient temperature in the goaf in real time using optical fiber temperature measurement technology and transmit it to the data processing layer.

[0039] In this embodiment, the explosion-proof and intrinsically safe temperature sensor for mining adopts an intrinsically safe design, an explosion-proof structure, and an explosion-proof mark of Exd i, which is suitable for underground coal mines with explosive gas mixtures such as methane (CH4) and coal dust. The explosion-proof and intrinsically safe temperature sensor for mining includes a transmitter, which uses imported PT100 as a sensitive element, and amplifies and processes through a precision electronic circuit with a dedicated small signal conversion integrated circuit as the core, and outputs a current signal that is proportional to the temperature. The transmitter housing is AuG12 aluminum casting and stainless steel housing, and the whole machine has a modular structure. The explosion-proof and intrinsically safe temperature sensor for mining has the remarkable characteristics of high accuracy, small size, and strong vibration resistance. It can be widely used in temperature measurement and process control in various environments of coal mines, as well as data acquisition. The output signal of the explosion-proof and intrinsically safe temperature sensor for mining is a two-wire 4mA-20mA signal, which can be connected to various PLCs and data measuring instruments to realize automatic real-time data acquisition.

[0040] The mine flameproof pressure transmitter is installed on different working surfaces in the coal mine and at the locations of the valves of the nitrogen generator. It is used to monitor the pressure of different working surfaces in the coal mine and the pressure of the valves of the nitrogen generator in real time through sensing elements, and transmit it to the data processing layer.

[0041] In this embodiment, the explosion-proof pressure transmitter for mining is an intelligent pressure measurement and control product that integrates pressure measurement and output. The product is a fully electronic structure, with a high-end piezoresistive pressure sensor at the front end, which is converted by high-precision A / D and processed by a microprocessor to output 4mA-20mA analog quantity. The explosion-proof pressure transmitter for mining is flexible to use, simple to operate, easy to debug, safe and reliable, and can be used to measure the pressure of fluid media in coal mines. The explosion-proof pressure transmitter for mining complies with the GB 3836.1-2010 explosion-proof standard and has obtained an explosion-proof certificate and a safety standard certificate. The explosion-proof mark is ExdIMb. It has the advantages of explosion-proof and explosion-proof, no need for association, direct use, wide range, suitable for high, medium and low pressures, anti-vibration, impact, corrosion-resistant all-stainless steel structure, small size, light weight, direct process installation, anti-interference design, and suitable for harsh environments in mines.

[0042] The data processing layer is used to accumulate and calculate all collected fluid flows, and integrate all collected ambient temperatures, pressures of different working surfaces in the coal mine, and pressures at the locations of various valves of the nitrogen generator, and then transmit the integrated fluid flows, ambient temperatures, and pressures at each location to the communication control layer.

[0043] In this embodiment, the intrinsically safe flow meter for mining, the explosion-proof and intrinsically safe temperature sensor for mining and the explosion-proof pressure transmitter for mining can directly output the measured data in the form of electrical signals. The above sensors usually output standard current signals such as 4mA-20mA and can be directly connected to the intelligent flow integrator and the multi-channel data acquisition instrument.

[0044] The data processing layer includes: an intelligent flow totalizer and a multi-channel data acquisition instrument.

[0045] The intelligent flow totalizer is used to receive all collected fluid flows, perform cumulative calculations on all fluid flows and display them, and transmit the cumulative results of the fluid flows to the communication control layer.

[0046] In order to meet the needs of the intelligent control system, a new type of intelligent flow totalizer is set in this embodiment. The intelligent flow totalizer is used in conjunction with the intrinsically safe flow meter for mining. It adopts the AI ​​series instrument universal hardware with mature technology and mass production, and cooperates with excellent flow totalizer software, so that the instrument has the advantages of rich functions, simple programming, good anti-interference and high reliability. The intelligent flow totalizer adopts modular input and programmable internally. The input flow signal can be a variety of common and special customized signals, and is displayed in the form of digital tube or Chinese LCD. The intelligent flow totalizer has complete temperature and pressure compensation function. There is no need to replace different instruments or models. The temperature and pressure compensation calculation of general gas, saturated steam, superheated steam and liquid can be realized through programming. When used as a batch controller, it has an independent 4-bit control accumulator and a 12-bit total accumulator, as well as a special display mode. It is powerful and easy to operate, ensuring that the frequency signal has sufficient flow calculation accuracy even at very low frequencies. At the same time, the intelligent flow totalizer integrates RS485 communication function, which can realize online work with the host system.

[0047] The multi-channel data acquisition instrument is used to respectively receive, record, integrate and display all collected ambient temperatures, pressures of different working surfaces in the coal mine and pressures at the locations of each valve of the nitrogen generator, and transmit the integrated ambient temperatures, pressures of different working surfaces in the coal mine and pressures at the locations of each valve of the nitrogen generator to the communication control layer.

[0048] In this embodiment, due to the installation position of the explosion-proof and intrinsically safe control box for mines, when the signal increases, the installation position of the explosion-proof and intrinsically safe control box for mines does not increase accordingly. Therefore, a multi-channel signal acquisition instrument is set up, which also has communication function, thereby solving the installation space problem and improving the signal acquisition and communication capabilities of the equipment itself. The multi-channel data acquisition instrument adopts programmable modular input, which can support thermocouples, thermal resistors, voltage, current and two-wire transmitter input; it is suitable for the measurement and display of various physical quantities such as temperature, pressure, flow, liquid level, humidity, etc.; the measurement accuracy is as high as 0.3 level. It also supports up to four alarm functions, including two upper limit alarms and two lower limit alarms, which can be output independently or share one relay output. It supports RS485 communication interface function, and the S or S4 module can communicate with the host computer when installed. The communication protocol is compatible with AI series instruments. It is powered by a switching power supply or a 24VDC power supply in the input range of 100VAC~240VAC, and has protection functions against lightning strikes and 10 seconds to prevent misconnection to a 380VAC power supply.

[0049] In this embodiment, a coal mine fire early warning joint prevention and control intelligent management and control platform is shown in actual application. A nitrogen generator-goaf area intelligent monitoring system is built according to the production site conditions of the coal mine. The system is divided into three parts according to the communication principle, such as Figure 2 As shown, they are application layer, link layer and device layer respectively. The application layer is located at the top, which is represented by a computer with an IP address of 10.157.38.18, and communicates with other devices in the system through the TCP / IP protocol; the link layer is located in the middle, which is represented by an Ethernet ring network, responsible for the transmission of data packets in the system, and multiple switches are connected through the TCP / IP protocol, and each switch has an IP address, which are 10.157.38.111, 10.157.38.112, 10.157.38.113 and 10.157.38.114 respectively; the device layer is located at the bottom, which is represented by various devices in the data acquisition layer, data processing layer and communication control layer of the system, and each device is connected to a switch, and each device has an IP address, which are 10.157.38.115, 10.157.38.116, 10.157.38.117 and 10.157.38.118 respectively. The equipment at the device layer is connected to the switch via the RS485MODbus communication protocol, which is a commonly used industrial communication protocol. The nitrogen generator-goaf intelligent monitoring system uses a typical industrial automation network, in which the computer, as the terminal at the application layer, communicates with the switch at the link layer via Ethernet, and the switch at the link layer communicates with the physical equipment at the device layer via the RS485MODbus protocol, which helps to realize remote monitoring and management of equipment in the mine.

[0050] The communication control layer is used to transmit the integrated fluid flow, ambient temperature and pressure at each position to the monitoring and early warning layer, and receive control instructions from the monitoring and early warning layer, and control the valves of the nitrogen generator in the goaf according to the control instructions to adjust the fluid flow in the closed pipeline in the goaf, the ambient temperature of the goaf, the pressure of different working faces in the coal mine, and the pressure at the position of each valve of the nitrogen generator.

[0051] The communication control layer includes: a serial port server and a mine-use flameproof and intrinsically safe control box.

[0052] The serial port server is used to respectively realize the transmission of data between the data processing layer and the mine flameproof and intrinsically safe control box and the transmission of control instructions between the mine flameproof and intrinsically safe control box and the monitoring and early warning layer.

[0053] In this implementation, the high-performance serial port server transmits the data of the data acquisition equipment to the mine explosion-proof and intrinsically safe control box through the network. USR-TCP232-30X is a high-performance, low-cost series of industrial-grade serial port servers that can achieve two-way fast data transmission between RS232 / RS485 / RS422 serial ports and RJ45 network ports. It integrates the TCP / IP protocol stack internally and expands the Modbus gateway properties. It can directly integrate the equipment into the industry scenario, thereby quickly completing the construction of the business framework and saving human resource investment. The platform uses 4 serial port servers of this type, which are installed in four nitrogen generators respectively, so that they have networking functions. At the same time, 2 intelligent valves are connected to realize remote start and stop control of cooling water of the nitrogen generator.

[0054] The mine-used explosion-proof and intrinsically safe control box is used to store the integrated fluid flow, ambient temperature and pressure at each position, and transmit them to the monitoring and early warning layer; it is used to receive control instructions from the monitoring and early warning layer, and adjust the fluid flow in the closed pipeline in the goaf by controlling the valve action of the nitrogen generator in the goaf according to the control instructions, thereby adjusting the ambient temperature of the goaf, the pressure of different working faces in the coal mine, and the pressure at the position of each valve of the nitrogen generator.

[0055] In this embodiment, the mine flameproof and intrinsically safe control box is an automation control device designed for underground coal mines, and has functions such as coal mine automatic control and data monitoring and transmission. Its main hardware components include: flameproof housing, main control PLC, signal isolation safety barrier, button indicator light and other auxiliary materials. The mine flameproof and intrinsically safe control box is PLC programmable and can adapt to a variety of automation control scenarios, such as drainage automation control, belt transportation automation control, valve control and other situations. Its modular design makes the control interface configuration flexible and easy to expand and adjust according to actual needs. The design of the mine flameproof and intrinsically safe control box takes into account the challenges of the harsh environment underground, so it has strong anti-interference ability. At the same time, it has strong communication capabilities and can effectively exchange data and transmit commands with other control devices. Its communication functions include RS485 communication, TCP / IP communication, analog communication and photoelectric conversion functions. As a part of the intelligent management and control platform for coal mine fire early warning, joint defense and joint control, the mine explosion-proof and case-type control box performs corresponding control actions according to the preset control logic, such as starting or stopping equipment, adjusting valve opening, etc. It effectively controls the start and stop of equipment and performs emergency stop and lockout in emergency situations to protect the safety of equipment and personnel.

[0056] The monitoring and early warning layer is used to select any one or more data of the integrated fluid flow, ambient temperature and pressure at each position according to the query conditions input by the user, and compare and analyze the selected data with the set threshold range. If the analysis result is normal, the current operating state of the nitrogen generator in the goaf is maintained; if the analysis result is abnormal, a fire alarm message is issued and a control instruction is issued to the monitoring and early warning layer to control the nitrogen generator to open the valve to inject nitrogen into the goaf to extinguish the fire until the analysis result becomes a normal position and the nitrogen injection is automatically stopped.

[0057] In this embodiment, the saved historical data and alarm data are queried by inputting the user's query conditions, which is convenient for summarizing the operation of the equipment and querying faults. The data analysis host in the monitoring and early warning layer has intelligent computing functions, which can detect the value of the goaf in real time and judge the current dangerous situation through the background data. When the detected value does not meet the set threshold range, the nitrogen generator is automatically started and the valve is opened to inject nitrogen into the goaf to extinguish the fire. When the detected value drops to the normal value, the nitrogen injection is automatically stopped and the equipment is shut down to achieve the intelligent linkage operation state.

[0058] The data visualization layer is used to display in real time the collected fluid flow in the closed pipeline in the goaf, the ambient temperature of the goaf, the pressure of different working faces in the coal mine, the pressure at the location of each valve of the nitrogen generator, the opening and position information of each valve in the nitrogen generator, and the historical monitoring data and fire alarm information stored in the communication control layer.

[0059] In the nitrogen generator-goaf intelligent monitoring system built in this embodiment, the data visualization interface during system operation includes the main interface, the valve pipeline control interface and the nitrogen generator control interface; the main interface mainly displays the operating status and data of the equipment included in the system, and also includes the goaf gas data collected by connecting to the goaf monitoring system. The main interface also includes a manual control button for the cooling water valve, which can manually control the start and stop of the valve and monitor its switch angle. The valve pipeline control interface intuitively displays the position of the valve outlet and the real-time data of the valve and flow. It is the main interface for controlling the valve. In this interface, the opening and closing of the valve can be remotely controlled by buttons, and the current real-time value of the flow can be viewed through the flow meter data, which reduces the complexity of operation and improves the operation efficiency. In the nitrogen generator control interface, the sub-chamber displays the control and operating status of the nitrogen generator. It is the main interface for controlling the nitrogen generator. In this interface, the remote one-key start of the nitrogen generator can be realized by operating the button, and the various data and alarm information after startup are displayed synchronously, providing a complete control window for the operator. In addition, the background of the nitrogen generator-goaf area intelligent monitoring system contains an intelligent calculation program that can monitor the goaf area data in real time. When the data is abnormal, a warning window can be automatically popped up for reference by the on-duty personnel.

[0060] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope defined by the claims of the present invention.

Claims

1. The coal mine fire early warning, joint prevention and control intelligent management and control platform is applied to the goaf equipped with nitrogen generators, which is characterized by: The platform includes: data collection layer, data processing layer, communication control layer, monitoring and early warning layer and data visualization layer; The data acquisition layer is used to collect in real time the fluid flow in the closed pipeline in the goaf, the ambient temperature of the goaf, the pressure of different working faces in the coal mine, and the pressure at the location of each valve of the nitrogen generator, and transmit all the collected data to the data processing layer and the data visualization layer; The data processing layer is used to accumulate and calculate all collected fluid flow rates, and respectively integrate all collected ambient temperatures, pressures of different working surfaces in the coal mine, and pressures at the locations of valves of the nitrogen generator, and then transmit the integrated fluid flow rates, ambient temperatures, and pressures at each location to the communication control layer; The communication control layer is used to store the integrated fluid flow, ambient temperature and pressure at each position and transmit them to the monitoring and early warning layer, and receive control instructions from the monitoring and early warning layer, and adjust the fluid flow in the closed pipeline in the goaf, the ambient temperature of the goaf, the pressure of different working faces in the coal mine, and the pressure at the position of each valve of the nitrogen generator by controlling the valve of the nitrogen generator in the goaf according to the control instructions; The monitoring and early warning layer is used to select any one or more data of the integrated fluid flow, ambient temperature and pressure at each position according to the query conditions input by the user, and compare and analyze the selected data with the set threshold range. If the analysis result is normal, the current operating state of the nitrogen generator in the goaf is maintained; if the analysis result is abnormal, a fire alarm message is issued and a control instruction is issued to the monitoring and early warning layer to control the nitrogen generator to open the valve to inject nitrogen into the goaf to extinguish the fire until the analysis result becomes a normal position, and the nitrogen injection is automatically stopped; The data visualization layer is used to display in real time the collected fluid flow in the closed pipeline in the goaf, the ambient temperature of the goaf, the pressure of different working faces in the coal mine, the pressure at the location of each valve of the nitrogen generator, the opening and position information of each valve in the nitrogen generator, and the historical monitoring data and fire alarm information stored in the communication control layer.

2. According to claim 1, the coal mine fire early warning, joint prevention and control intelligent management and control platform is characterized in that: The data acquisition layer includes: a mine intrinsically safe flow meter, a mine flameproof and intrinsically safe temperature sensor and a mine flameproof pressure transmitter; wherein the mine intrinsically safe flow meter is installed in a closed pipeline in a coal mine; the mine flameproof and intrinsically safe temperature sensor is vertically suspended at a position where the airflow is stable above the tunnel; the mine flameproof pressure transmitter is installed on different working surfaces in the coal mine and at the locations of the valves of the nitrogen generator.

3. According to claim 2, the coal mine fire early warning, joint prevention and control intelligent management and control platform is characterized in that: The mine intrinsically safe flow meter is used to collect the fluid flow in the closed pipeline in the goaf in real time and transmit it to the data processing layer; The fluid flow rate includes: flow rate percentage, instantaneous flow rate and cumulative flow rate; The mine flameproof and intrinsically safe temperature sensor uses optical fiber temperature measurement technology to monitor the ambient temperature in the goaf in real time and transmit it to the data processing layer; The mine flameproof pressure transmitter monitors the pressure of different working surfaces in the coal mine and the pressure of each valve position of the nitrogen generator in real time through the sensor element, and transmits the pressure to the data processing layer.

4. According to claim 3, the coal mine fire early warning, joint prevention and control intelligent management and control platform is characterized in that: The data processing layer includes: an intelligent flow totalizer and a multi-channel data acquisition instrument; The intelligent flow totalizer is used to receive all collected fluid flows, perform cumulative calculations on all fluid flows and transmit them to the communication control layer; The multi-channel data acquisition instrument is used to respectively receive, record, integrate and display all collected ambient temperatures, pressures of different working surfaces in the coal mine and pressures at the locations of each valve of the nitrogen generator, and transmit the integrated ambient temperatures, pressures of different working surfaces in the coal mine and pressures at the locations of each valve of the nitrogen generator to the communication control layer.

5. According to claim 4, the coal mine fire early warning, joint prevention and control intelligent management and control platform is characterized in that: The communication control layer includes: a serial port server and a mine-use flameproof and intrinsically safe control box; The serial port server is used to realize the transmission of data between the data processing layer and the mine flameproof and intrinsically safe control box and the transmission of control instructions between the mine flameproof and intrinsically safe control box and the monitoring and early warning layer respectively; The mine-used explosion-proof and intrinsically safe control box is used to store the integrated fluid flow, ambient temperature and pressure at each position, and transmit them to the monitoring and early warning layer; it is used to receive control instructions from the monitoring and early warning layer, and to adjust the fluid flow in the closed pipeline in the goaf by controlling the valve of the nitrogen generator in the goaf according to the control instructions, thereby adjusting the ambient temperature of the goaf, the pressure of different working faces in the coal mine and the pressure at the position of each valve of the nitrogen generator.

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