Intelligent ventilation system for mine

Abstract

The invention relates to the technical field of mine intelligent ventilation, and discloses a mine intelligent ventilation system which comprises a mine ventilation environment parameter monitoring system, an air door and air window automation and remote control system, a local ventilator intelligent control system, a main ventilator intelligent monitoring system and an analysis decision platform. In the mine ventilation environment parameter monitoring system, according to the principle of mine ventilation resistance measurement, a ventilation route of a mine is selected, multi-parameter sensors are arranged at nodes, air pressure, temperature, humidity, wind speed and wind quantity at the starting end and the tail end of each roadway of the mine are monitored in real time, and node air density is calculated. According to the intelligent ventilation system for the mine, real-time wind measurement improves the wind measurement precision and frequency of the mine and reduces the workload of manual wind quantity detection, meanwhile, the number of wind measurement staff can be properly reduced, manual inspection tour and unattended operation of wind measurement work are achieved, and therefore expenditure is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of mine intelligent ventilation, and in particular to a mine intelligent ventilation system. Background Art

[0002] Air supply in coal mines is the basic condition to ensure the normal work and safe production of mine workers. It is the most basic link in all production links of mines. Reasonable mine ventilation and systematic monitoring and intelligent control of the ventilation system are the basic means to create a climatic environment suitable for work, prevent various disasters and accidents, and achieve safe production.

[0003] At present, the intelligent ventilation system mainly has the following problems:

[0004] (1) For ventilation environment monitoring, only a small number of wind speed sensors are arranged in the safety monitoring system (and the accuracy of the existing wind speed sensors cannot meet the actual needs), which cannot automatically measure wind and does not have the ventilation resistance monitoring function;

[0005] (2) The local ventilation fans at the excavation face did not realize the variable frequency speed regulation function, and did not realize remote real-time monitoring;

[0006] (3) The dampers and windows underground have not realized quantitative automatic control and remote centralized control functions;

[0007] (4) A professional software platform has not been established on the ground, and the underground environmental parameters, ventilation power and ventilation facility parameters have not been monitored in real time. The three-dimensional dynamic visualization of the underground ventilation status has not been achieved, and the dynamic solution function of the ventilation network is not available. At the same time, the ventilation system does not have fault diagnosis, prediction and early warning functions. The linkage control function of the ventilation system has not been realized during disasters, and the purpose of the ventilation system to prevent, reduce and control disasters has not been achieved. Summary of the invention

[0008] 1. Technical issues to be resolved

[0009] The purpose of the present invention is to solve the above-mentioned problems and to propose an intelligent mine ventilation system.

[0010] (II) Technical solution

[0011] The technical solution of the present invention to solve the above technical problems is as follows:

[0012] A mine intelligent ventilation system includes a mine ventilation environment parameter monitoring system, an air door and window automation and remote control system, a local ventilator intelligent control system, a main ventilator intelligent monitoring system and an analysis and decision-making platform, wherein in the mine ventilation environment parameter monitoring system, according to the principle of mine ventilation resistance measurement, a mine ventilation route is selected, and multi-parameter sensors are arranged at the nodes to monitor the air pressure, temperature, humidity, wind speed and volume at the beginning and end of each tunnel of the mine in real time, calculate the air density of the node, monitor and measure the tunnel resistance section by section, realize online monitoring of ventilation resistance, and obtain the total resistance of the mine by accumulation; in addition, the natural wind pressure parameters of the mine can be monitored in real time, the wind resistance parameters of the main tunnels can be mastered, and the resistance distribution of the three zones of mine ventilation resistance, namely, the air intake zone, the air use zone and the return air zone, can be mastered, and the automatic air door and the automatic air window can be combined into the automatic air door and the automatic air window in the remote control system. The control system of the window is equipped with an industrial Ethernet transmission interface, which is connected to the underground ring network to achieve unified management and control of ground centralized control and dispatch. An intelligent local ventilation system is established in the local fan intelligent control system to realize online monitoring of the fan, remote centralized control, video monitoring, quantitative regulation of air volume, and intelligent gas emission functions. The main fan intelligent monitoring system can control the gate opening and fan operating frequency locally and remotely to change the air volume of the main fan. Through the PLC control system, the ground interface and the protocol access software platform, the ground air volume online adjustment function can be realized. The analysis and decision-making platform displays the distribution of ventilation parameters of various air-using locations in the mine in real time. At the same time, the ventilation information management platform can integrate safety monitoring, optical fiber temperature measurement, bundle tube monitoring and other data, analyze various fire monitoring data, and analyze and warn of mine fires.

[0013] Based on the above technical solution, the present invention can also be improved as follows.

[0014] Furthermore, in the mine ventilation environment parameter monitoring system, wind speed and direction sensors are used to measure the wind speed and volume at the main wind measurement locations underground, and multi-parameter sensors are used to continuously detect temperature, humidity and atmospheric pressure. Wind speed and direction sensors are arranged according to the mine ventilation system diagram to measure wind speed, volume and wind direction. At the same time, in order to ensure the accuracy of the overall data, two ventilation routes should be selected according to the mine ventilation system diagram, and multi-parameter measurement of the mine ventilation resistance measurement route should be carried out.

[0015] Furthermore, the ground centralized control software platform in the damper and window automation and remote control system integrates video monitoring technology to monitor the conditions of dampers at various locations. At the same time, a main unit of a mine-use explosion-proof and intrinsically safe damper monitoring device is provided to realize independent operation of a single damper, including the collection of various sensor data, feedback on the damper opening and closing status, voice and light prompts, and damper opening and closing control. A voice and light alarm device is also provided outside each damper, and each damper is also provided with two pairs of opening and closing status sensors. Each damper is equipped with two pairs of infrared counter-radiation sensors to realize automatic control of the damper.

[0016] Furthermore, the control system of the automatic wind window collects wind volume information monitored by the mine wind speed sensor, automatically adjusts the wind window opening according to the preset wind volume value, so as to keep the local ventilation volume of the area at a constant value, and installs an explosion-proof and intrinsically safe electric control box on each wind window, implements online monitoring of the wind window pneumatic drive device, automatically and manually controls the opening change of the wind window, realizes the regulation of air volume, and has a self-diagnosis function, which can realize the automatic adjustment of the ventilation volume of the wind window part. The device can be connected to the coal mine ring network via Ethernet, so as to realize the information sharing between the wind window air regulation system and the air regulation system of the whole mine.

[0017] Furthermore, the local ventilation fan intelligent control system is composed of a system control cabinet, a host computer, and front-end acquisition sensors. The control cabinet adopts PLC as the control core to collect operating data of electromechanical equipment, including voltage, current, faults, temperature, vibration, etc., as well as environmental parameter collection, including air volume, wind pressure, temperature, methane, etc. The host computer adopts an industrial control computer as the host, and communicates with the PLC using Ethernet. The data collected by the PLC is read into the industrial computer and displayed on the interface. The local ventilation fan and the main ventilation fan share a host computer, and the main ventilation fan and local ventilation fan on the ground are centrally monitored and controlled in the dispatching room. The PLC programmable control box for the local ventilation fan is placed next to the local ventilation fan and has an electrical communication interface. It can be directly connected to the mine industrial network. An association device is set up between the main and standby local ventilation fans to realize remote one-button automatic switching and frequency conversion control.

[0018] Furthermore, the main fan intelligent monitoring system uses sensors to monitor wind pressure, shaft temperature, vibration, frequency, start and stop, gate opening, equipment failure, etc., electrical parameters current, voltage, and power, and each parameter is directly output to the ground monitoring platform through a centralized control box. The air volume is calculated based on the fan or wind tunnel speed pressure and cross-sectional area, or the wind speed and air volume are obtained through sensors and uploaded to the ground monitoring platform. When the shaft temperature exceeds the specified value, the gate opening does not meet the requirement, and the current and voltage do not meet the requirements, an alarm message appears.

[0019] Furthermore, a three-dimensional software platform is established in the analysis and decision-making platform, and information management is supported to realize the "one-key wind measurement" function, automatic generation of ventilation reports, automatic drawing of ventilation stereograms and ventilation network diagrams, online dynamic management of ventilation system diagrams, and three-dimensional visualization of ventilation systems, which can display the distribution of ventilation parameters of various air-using locations in the mine in real time. At the same time, the ventilation information management platform can integrate safety monitoring, optical fiber temperature measurement, bundle tube monitoring and other data, analyze various fire monitoring data, and analyze and warn of mine fires.

[0020] Furthermore, the analysis and decision-making platform also includes real-time solution of the ventilation network and an intelligent ventilation system control system, wherein association rules between sensor data and ventilation alarm and ventilation control are established in the real-time solution of the ventilation network, and user-defined rule settings are supported. Alarm levels and control targets are set for different gas concentrations and air volumes, fires, and equipment failures. In the intelligent ventilation system control system, auxiliary decisions on monitoring point layout, auxiliary decisions on wind window adjustment positions and adjustment amounts, auxiliary decisions on ventilation power adjustment, intelligent diagnosis of ventilation power failures, intelligent diagnosis of ventilation facility failures, and ventilation network failure diagnosis functions can be realized. Based on the perception information, the underground dampers and wind windows can be intelligently opened, closed, and adjusted, realizing remote centralized control and remote start and stop functions of underground local ventilators, and realizing monitoring, surveillance, and supervision.

[0021] (III) Beneficial effects

[0022] Compared with the prior art, the technical solution of this application has the following beneficial technical effects:

[0023] 1. Real-time wind measurement improves the accuracy and frequency of wind measurement in mines and reduces the workload of manual wind volume detection. It can also appropriately reduce the number of wind measurement employees, realize manned inspection and unmanned wind measurement work, thereby reducing expenses;

[0024] 2. The intelligent ventilation system project will make the complex ventilation resistance measurement work become a daily behavior in production mines. Relevant professional leaders and technicians can grasp the ventilation status of each tunnel at any time, which will improve management efficiency and save a lot of costs;

[0025] 3. The use of intelligent ventilation system will enable managers to timely discover problems in the existing ventilation system, such as unnecessary air leakage, insufficient air supply and excessive air supply. Through intelligent adjustment, the most reasonable and effective air supply can be achieved, so that the mine ventilation system can always maintain the best working state, thereby greatly reducing energy consumption during ventilation;

[0026] 4. The use of intelligent ventilation system, combined with ventilation simulation, matches the most optimized ventilation design scheme, thereby avoiding the construction of unnecessary ventilation facilities and ventilation tunnels, and saving a lot of ventilation engineering construction costs while ensuring the ventilation needs and ventilation safety of the mine;

[0027] 5. The use of intelligent ventilation system will effectively reduce ventilation safety accidents and reduce shutdown accidents caused by abnormal ventilation, thereby ensuring safe and orderly production in mines;

[0028] 6. Realize accurate monitoring, adaptive adjustment, and ventilation disaster linkage control of mine air volume; greatly improve the automation, informationization, intelligence, and disaster emergency wind control capabilities of the ventilation system. Ultimately achieve the goal of ventilation automation, intelligent analysis and decision-making, and remote unmanned control. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is an overall solution architecture diagram for the construction of an intelligent mine ventilation system according to the present invention. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] Combination Figure 1As shown, an intelligent mine ventilation system of the present invention includes a mine ventilation environment parameter monitoring system, an air door and window automation and remote control system, a local ventilator intelligent control system, a main ventilator intelligent monitoring system and an analysis and decision-making platform, wherein in the mine ventilation environment parameter monitoring system, according to the principle of mine ventilation resistance measurement, a mine ventilation route is selected, and multi-parameter sensors are arranged at the nodes to monitor the air pressure, temperature, humidity, wind speed and volume at the beginning and end of each tunnel of the mine in real time, calculate the air density of the node, monitor and measure the tunnel resistance section by section, realize online monitoring of ventilation resistance, and obtain the total resistance of the mine by accumulation; in addition, the natural wind pressure parameters of the mine can be monitored in real time, the wind resistance parameters of the main tunnels can be mastered, and the resistance distribution of the three zones of mine ventilation resistance, namely, the air intake zone, the air use zone and the return air zone, can be mastered. The automatic air door and the wind window automation and remote control system will automatically monitor the air door and the wind window. The control system of the automated wind window is equipped with an industrial Ethernet transmission interface, which is connected to the underground ring network to achieve unified control of ground centralized control and dispatching. An intelligent local ventilation system is established in the local fan intelligent control system to achieve online monitoring of the fan, remote centralized control, video monitoring, quantitative regulation of air volume, and intelligent gas emission functions. The main fan intelligent monitoring system can control the gate opening and fan operating frequency locally and remotely to change the air volume of the main fan. Through the PLC control system, the ground interface and the protocol access software platform, the ground air volume online adjustment function can be realized. The analysis and decision-making platform displays the distribution of ventilation parameters of various air-using locations in the mine in real time. At the same time, the ventilation information management platform can integrate safety monitoring, optical fiber temperature measurement, bundle tube monitoring and other data, analyze various fire monitoring data, and analyze and warn of mine fires.

[0032] In the mine ventilation environment parameter monitoring system, the wind speed and wind direction sensors are used to measure the wind speed and wind volume at the main wind measurement locations underground. The multi-parameter sensors are used to continuously detect the temperature, humidity and atmospheric pressure. The wind speed and wind direction sensors are arranged according to the mine ventilation system diagram to measure the wind speed, wind volume and wind direction. At the same time, in order to ensure the accuracy of the overall data, two ventilation routes should be selected according to the mine ventilation system diagram to carry out multi-parameter measurement of the mine ventilation resistance measurement route;

[0033] The YFC15 mining intrinsically safe ultrasonic anemometer is used to measure wind speed and volume. The YFC15 mining intrinsically safe ultrasonic anemometer is a full-section precision wind measuring device that uses the time difference of ultrasonic waves propagating in the air to measure wind speed. It is used to monitor the wind speed of a certain section in the tunnel in the mine. The wind volume is obtained by multiplying the wind speed by the cross-sectional area of ​​the tunnel. It is mainly composed of a display host and an ultrasonic probe, and is used to monitor the wind flow speed in a tunnel with a larger width. It uses the time difference when sound waves propagate the same distance in the fluid downstream and upstream, and this time difference is related to the flow velocity of the measured fluid. The flow velocity of the fluid is obtained by measuring the time difference. A single host can collect signals of wind speed in the section through up to 3 sets of ultrasonic probes, and then obtain the specific wind speed through data processing analysis and calculation, and transmit it to the ground. At the same time, the anemometer adopts the principle of ultrasonic velocity measurement with time difference, using the time difference when sound waves propagate the same distance in the fluid downstream and upstream, and the propagation time difference is related to the flow velocity of the measured fluid. The flow velocity of the fluid is obtained by measuring the difference in time. The sensor collects wind speed signals through two ultrasonic probes, and then analyzes and calculates them through the main control board to obtain the specific wind speed, and transmits it to the ground directly or through other communication substations through RS485 signals. Wind speed refers to the wind speed of a section in the tunnel in the mine. The air volume is obtained by multiplying the wind speed by the cross-sectional area of ​​the tunnel. The GD3 mining multi-parameter sensor is used to detect atmospheric pressure, temperature and humidity. It uses differential pressure elements and temperature and humidity sensitive capacitor elements to monitor environmental pressure, humidity and temperature. The sensor housing is made of stainless steel, can be adjusted by infrared remote control, and has a built-in sensitive element. Under the control of the program, three external environmental parameters can be detected simultaneously. When a change in environmental parameters is detected, the sensitive element senses the change in external parameters and outputs a digital signal. Through the communication response mechanism with the single-chip microcomputer, the data is transmitted to the single-chip microcomputer for processing. The processed digital signal is sent to the drive circuit, and the display screen displays the temperature, humidity, and atmospheric pressure values. At the same time, the corresponding digital signal is output and uploaded to the monitoring substation. During the detection process, 30 wind measurement locations should be set up, requiring a total of 30 sets of ultrasonic wind measurement sensors and 30 sets of GD3 mining multi-parameter sensors;

[0034] In the air door and window automation and remote control system, the ground centralized control software platform integrates video monitoring technology, which can monitor the situation of air doors at various locations. At the same time, a main engine of mine explosion-proof and intrinsically safe air door monitoring device is also set up to realize the independent operation of a single air door, including the collection of various sensor data, feedback on the opening and closing status of the air door, voice and light prompts and air door opening and closing control. A voice and light alarm device is also set outside each air door. Each air door is also equipped with two pairs of opening and closing status sensors. Each air door is equipped with two pairs of infrared counter-radiation sensors to realize the automatic control function of the air door. Among them, the main function of the automatic air door is to cut off the airflow when the mine is ventilated normally to facilitate the passage of vehicles and people. It has the functions of automatic identification of vehicles and pedestrians, automatic switch of air door and short-circuit locking of wind flow. At the same time, the automatic air door has the functions of adaptive tunnel deformation (less than 100mm), multiple reliable locking, remote automatic control, anti-pinch vehicle, anti-pinch person, corrosion resistance, etc., realizing triple locking of light control, infrared sensing, pneumatic mechanical and electric control. When a fire occurs underground, especially when there is an external fire in the conveyor belt, the automatic damper can quickly isolate and remove harmful gases, and has the functions of remote quick unlocking and remote automatic control;

[0035] The control system of the automatic wind window collects the wind speed sensor to monitor the wind volume information, and automatically adjusts the wind window opening according to the preset wind volume value to achieve the local ventilation volume in the area at a constant value. An explosion-proof and intrinsically safe electric control box is installed on each wind window to implement online monitoring of the wind window pneumatic drive device, automatically and manually control the wind window opening change to achieve the regulation of air volume, and has a self-diagnosis function, which can realize the automatic adjustment of the ventilation volume of the wind window. The device can be connected to the coal mine ring network through Ethernet to realize the information sharing of the wind window air adjustment system and the air adjustment system of the whole mine. At the same time, the construction of the wind door with the wind window mainly considers the communication wind door between the main air inlet and the return air main lane, so as to ensure the stability of the lane ventilation system;

[0036] The local ventilator intelligent control system consists of a system control cabinet, a host computer, and front-end acquisition sensors. The control cabinet uses PLC as the control core to collect the operating data of electromechanical equipment, including voltage, current, faults, temperature, vibration, etc., as well as environmental parameter collection, including air volume, air pressure, temperature, methane, etc. The host computer uses an industrial control computer as the host, and communicates with the PLC using Ethernet. The data collected by the PLC is read into the industrial computer and displayed on the interface. The local ventilator and the main ventilator share a host computer, and the main ventilator and local ventilator on the ground are centrally monitored and controlled in the dispatching room. The PLC programmable control box for the local ventilator is placed next to the local ventilator and has an electrical communication interface that can be directly connected to the mine industrial network. A linkage device is set up between the main and standby ventilators of the local ventilator to achieve remote one-button automatic switching and frequency conversion control.

[0037] Wind speed sensors are installed at the air intake and outlet of the local ventilator. The wind speed sensor of the wind duct adopts the ultrasonic time difference method test principle, with a range of 0.1-15m / s and a wind speed measurement accuracy of 1%fs. Arrange according to the actual situation on site: T1 is the gas concentration sensor of the working face, T2 is the gas concentration sensor of the return air flow, and T1 and T2 are used together as the basis for controlling the air volume in normal ventilation state; T3 is the gas concentration sensor of the return air lane, which only collects data in the automatic ventilation state and is not used as a control basis. It is used as the basis for controlling the air volume in the gas exhaust state; T4 is the gas concentration sensor at the air inlet of the fan, which can realize online monitoring, video monitoring, automatic gas discharge, automatic switching of the main and standby fans, remote unmanned fan start-up, manual frequency adjustment and other functions.

[0038] The main fan intelligent monitoring system uses sensors to monitor wind pressure, shaft temperature, vibration, frequency, start and stop, gate opening, equipment failure, etc., electrical parameters such as current, voltage, and power, and various parameters are directly output to the ground monitoring platform through a centralized control box. The air volume is calculated based on the fan or wind tunnel speed pressure and cross-sectional area, or the wind speed and air volume are obtained through sensors and uploaded to the ground monitoring platform. When the shaft temperature exceeds the specified value, the gate opening does not meet the requirements, and the current and voltage do not meet the requirements, an alarm message will appear. At present, the main fan of the mine has frequency conversion function, remote control function (start and stop, one-button reversal), status monitoring and other functions. Combined with the existing main fan online monitoring system, it adopts multiple methods such as reading database, interface call, network communication, and data exchange files to realize the fusion and utilization of heterogeneous data of the existing main fan intelligent control system in the mine;

[0039] A three-dimensional software platform is established in the analysis and decision-making platform, and information management is supported to realize the "one-key wind measurement" function, automatic generation of ventilation reports, automatic drawing of ventilation stereograms and ventilation network diagrams, online dynamic management of ventilation system diagrams, and three-dimensional visualization of ventilation systems. The distribution of ventilation parameters at various air-using locations in the mine is displayed in real time. At the same time, the ventilation information management platform can integrate data such as safety monitoring, optical fiber temperature measurement, and bundle tube monitoring, analyze various fire monitoring data, and analyze and warn of mine fires, including the following:

[0040] (1) Supports the input of vector graphics of two-dimensional maps, including the functions of adding, modifying and deleting tunnel polylines. It realizes the visual editing of polyline plane coordinates and supports the input of information such as elevation, name, type, etc. It also supports the maintenance of topological relationships of two-dimensional vector graphics and edits the topological adjacency relationship between tunnel vectors in the graphical interface. The tunnels and vertices are represented in the graph theory G(V, E). All tunnel information can be manually input and the information content can be displayed by clicking. It has the ability to display the dynamic display of the equipment layout, wind direction, graded warning, equipment and facility status of the entire mine. It also realizes functions such as map browsing, map roaming, information picking, and equipment query.

[0041] (2) Three-dimensional modeling is performed for different types of underground equipment, including various sensors such as methane, temperature and humidity, and ventilation system-related dampers, wind windows, main fans, local fans, etc., as well as tunnels, rocks, etc. At the same time, it supports an open architecture for equipment modeling, which facilitates the expansion of other types of equipment in project applications and can perform operations such as interface editing.

[0042] (3) Disaster Evacuation Routes

[0043] Supports the input of disaster evacuation route plans, including plan name, lane sequence, type notes, etc. Automatically extract the optimal disaster evacuation route based on the location of the disaster and the constraints of various sensor data along the way.

[0044] (4) Communication interface

[0045] Supports monitoring interface analysis and data services, and realizes real-time display of data on the map interface. For wind path topology and ventilation parameters, for different types of sensors, hierarchical alarms are displayed in the form of animation on the map interface based on real-time data and alarm definitions.

[0046] (5) A coal mine fire warning parameter monitoring system was established, including the centralized display and warning of the existing underground bundle tube monitoring system and nitrogen generator monitoring system.

[0047] The analysis and decision-making platform also includes real-time solution of ventilation network and intelligent ventilation system control system. In the real-time solution of ventilation network, association rules between sensor data and ventilation alarm and ventilation control are established, and user-defined rule settings are supported. Alarm levels and control targets can be set for different gas concentrations and air volumes, fires, and equipment failures. In the intelligent ventilation system control system, auxiliary decisions on monitoring point layout, auxiliary decisions on wind window adjustment positions and adjustment amounts, auxiliary decisions on ventilation power adjustment, intelligent diagnosis of ventilation power failures, intelligent diagnosis of ventilation facility failures, and ventilation network failure diagnosis functions can be realized. Based on the perception information, the underground dampers and wind windows can be intelligently opened, closed, and adjusted, and remote centralized control and remote start and stop functions of underground local ventilators can be realized, and monitoring, surveillance, and supervision can be realized.

[0048] (1) The ventilation network is a constantly changing system. The mine ventilation network structure is updated in real time through the mine ventilation three-dimensional model synchronization module. Based on the mine ventilation monitoring data, the mine ventilation management system uses the real-time monitoring air volume data as a benchmark. Within one inspection cycle of the monitoring system, it quickly iterates and calculates the air volume of all tunnels in the mine, and solves the ventilation resistance and air volume of the entire ventilation system in real time, thereby realizing the natural and on-demand air distribution of the entire mine ventilation network. At the same time, the heat-flow coupling theory is used to realize the dynamic network solution of the wind network during the fire period.

[0049] (2) Through real-time network analysis, the mine ventilation system can self-diagnose faults, quickly calculate the required air volume at each air point, and optimize the air supply on demand. It can also realize intelligent linkage control with other systems to achieve intelligent disaster warning and intelligent planning of evacuation routes.

[0050] (3) Network initialization

[0051] Ventilation network topology maintenance supports topological relationship entry and parameter entry, including: length, tunnel support form, cross-sectional shape, width and height, cross-sectional area, node elevation, wind resistance coefficient, etc.

[0052] It supports the function of measuring wind and calculating resistance, collecting data from wind meters of different standards, atmospheric pressure data, temperature and humidity data, and performing regular inspections and collection. It can also initialize the wind resistance coefficient through visual input.

[0053] (4) Ventilation calculation

[0054] Steady-state solution: Based on the conservation of nodal air volume and zero loop wind pressure according to two Kirchhoff's laws, the loop air volume is iteratively solved using the improved Hardy-Cross loop method.

[0055] Non-steady-state solution: Based on the NS equations, the SUPG finite element method is used to dynamically simulate the local disaster.

[0056] The system provides ventilation network solution function based on 3D GIS, and can access the main fan monitoring, local fan monitoring, and damper and window monitoring data. When the hardware system is sound, the geographic information system can be integrated with the fan, damper, and window monitoring system, safety environment monitoring, mining face location and status monitoring system, and personnel and vehicle positioning system to achieve natural wind distribution solution, real-time solution of ventilation network, and wind flow simulation under disaster conditions. It can optimize the ventilation system, optimize the layout of wind speed sensors and adjustment facilities, and evaluate controllability, and realize ventilation system status identification and fault diagnosis, air volume forecasting at air points, and intelligent control of wind adjustment and control under disaster conditions. Under the authorized state, the mine wind flow and air volume in normal state are remotely adjusted according to the principles of safety and efficiency, and the wind control and adjustment are intelligently carried out according to the principles of controlling disasters and facilitating rescue during disasters, and three-dimensional dynamic visualization is realized.

[0057] A remote control subsystem for ventilation facilities and equipment is customized and developed in the intelligent ventilation system control system, and integrated with the mine intelligent ventilation decision system to realize linkage control, including main fan online monitoring module, main fan remote control module, local fan intelligent control module, ventilation network solution module, wind network online monitoring module, wind network abnormal warning module, wind flow on-demand distribution simulation module, wind flow natural wind distribution simulation module, two-dimensional and three-dimensional ventilation system display module, air volume remote control module, damper remote control module, wind window adjustment remote control module, working face area reverse wind control module, belt fire wind flow short circuit control module. Under the authorization state, the main fans, local fans and underground intelligent ventilation facilities of the mine can be autonomously regulated to ensure the economic and stable operation of the mine ventilation system. The front-end page of the platform management is implemented by H5, Echarts, Three.js and other technologies. The back-end service is developed by Java language and Spring Boot framework, and Spring Boot Websocket is used to realize the real-time communication between service data and front-end Web page data. The OPC method is used to achieve docking with ventilation equipment. Realize the storage, query and analysis of ventilation parameter data, realize OPC parameter configuration of ventilation equipment, realize alarm recording and reminder, realize operation recording and query, and realize software account and permission control.

[0058] According to the actual situation of the intelligent construction needs of mine ventilation system, a mine ventilation environment parameter monitoring and early warning system, a remote automatic control system for air doors and windows, and an intelligent monitoring and control system for main and local fans are constructed. A three-dimensional simulation software platform for mine ventilation system is constructed, and a software platform for control and analysis and decision-making of mine ventilation system is established, and finally a set of mine intelligent ventilation comprehensive management and control system is formed. Including intelligent control systems for remotely controlled ventilation facilities and equipment such as main fans, local fans, air doors, and air windows; multi-group linkage control systems for regional wind flow control, working face backwind and belt conveyor fire wind flow control. Realize real-time monitoring of mine ventilation parameters, monitoring and control of ventilation power and ventilation facilities, early warning of wind flow anomalies and harmful gas parameters, and realize ventilation system prevention and control of disaster expansion before and after disasters, minimize the losses caused by disasters and accidents, and greatly improve the informationization, automation and intelligence level of ventilation systems and disaster emergency prevention and control capabilities.

[0059] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0060] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A mine intelligent ventilation system, characterized in that: It includes a mine ventilation environment parameter monitoring system, an air door and window automation and remote control system, a local fan intelligent control system, a main fan intelligent monitoring system and an analysis and decision-making platform. In the mine ventilation environment parameter monitoring system, according to the principle of mine ventilation resistance measurement, a mine ventilation route is selected, and multi-parameter sensors are arranged at the nodes to monitor the air pressure, temperature, humidity, wind speed and volume at the beginning and end of each tunnel in the mine in real time, calculate the air density of the node, monitor and measure the tunnel resistance section by section, realize online monitoring of ventilation resistance, and obtain the total resistance of the mine by accumulation; in addition, it can monitor the natural wind pressure parameters of the mine in real time, master the wind resistance parameters of the main tunnels, and master the resistance distribution of the three zones of mine ventilation resistance: air inlet zone, air use zone and return air zone. The control system of the automatic air door and automatic air window is integrated into the air door and window automation and remote control system. The system is equipped with an industrial Ethernet transmission interface, which is connected to the underground ring network to achieve unified management and control of ground centralized control and dispatch. An intelligent local ventilation system is established in the local fan intelligent control system to realize online monitoring of the fan, remote centralized control, video monitoring, quantitative regulation of air volume, and intelligent gas emission functions. The main fan intelligent monitoring system can control the gate opening and fan operating frequency locally and remotely to change the air volume of the main fan. Through the PLC control system, the ground interface and the protocol access software platform, the ground air volume online adjustment function can be realized. The analysis and decision-making platform displays the distribution of ventilation parameters of various air-using locations in the mine in real time. At the same time, the ventilation information management platform can integrate safety monitoring, optical fiber temperature measurement, bundle tube monitoring and other data, analyze various fire monitoring data, and analyze and warn of mine fires.

2. A mine intelligent ventilation system according to claim 1, characterized in that: The mine ventilation environment parameter monitoring system uses wind speed and direction sensors to measure wind speed and volume at the main wind measurement locations underground, uses multi-parameter sensors to continuously detect temperature, humidity and atmospheric pressure, and arranges wind speed and direction sensors according to the mine ventilation system diagram to measure wind speed, volume and direction. At the same time, in order to ensure the accuracy of the overall data, two ventilation routes should be selected according to the mine ventilation system diagram to perform multi-parameter measurement of the mine ventilation resistance measurement route.

3. The intelligent mine ventilation system according to claim 1, characterized in that: The ground centralized control software platform in the damper and window automation and remote control system integrates video monitoring technology, which can monitor the conditions of dampers at various locations. At the same time, a main unit of a mine-use explosion-proof and intrinsically safe damper monitoring device is also provided to realize independent operation of a single damper, including the collection of various sensor data, damper opening and closing status feedback, voice and light prompts, and damper opening and closing control. A voice and light alarm device is also provided outside each damper, and each damper is also provided with two pairs of opening and closing status sensors. Each damper is equipped with two pairs of infrared counter-radiation sensors to realize automatic control of the damper.

4. The intelligent mine ventilation system according to claim 3, characterized in that: The control system of the automatic wind window collects the wind volume information monitored by the mine wind speed sensor, automatically adjusts the wind window opening according to the preset wind volume value, so as to keep the local ventilation volume of the area at a constant value, and installs an explosion-proof and intrinsically safe electric control box on each wind window, implements online monitoring of the wind window pneumatic drive device, automatically and manually controls the opening change of the wind window, realizes the regulation of air volume, and has a self-diagnosis function, which can realize the automatic adjustment of the ventilation volume of the wind window part. The device can be connected to the coal mine ring network through Ethernet, so as to realize the information sharing of the wind window air regulation system and the air regulation system of the whole mine.

5. The intelligent mine ventilation system according to claim 1, characterized in that: The local ventilation fan intelligent control system is composed of a system control cabinet, a host computer, and front-end acquisition sensors. The control cabinet uses PLC as the control core to collect operating data of electromechanical equipment, including voltage, current, faults, temperature, vibration, etc., as well as environmental parameter collection, including air volume, wind pressure, temperature, methane, etc. The host computer uses an industrial control computer as the host, and communicates with the PLC using Ethernet. The data collected by the PLC is read into the industrial computer and displayed on the interface. The local ventilation fan and the main ventilation fan share a host computer, and the main ventilation fan and local ventilation fan on the ground are centrally monitored and controlled in the dispatching room. The PLC programmable control box for the local ventilation fan is placed next to the local ventilation fan and has an electrical communication interface. It can be directly connected to the mine industrial network. An association device is set up between the main and standby local ventilation fans to realize remote one-button automatic switching and frequency conversion control.

6. The intelligent mine ventilation system according to claim 1, characterized in that: The main fan intelligent monitoring system uses sensors to monitor wind pressure, shaft temperature, vibration, frequency, start and stop, gate opening, equipment failure, etc., electrical parameters current, voltage, and power, and each parameter is directly output to the ground monitoring platform through a centralized control box. The air volume is calculated based on the fan or wind tunnel speed pressure and cross-sectional area, or the wind speed and air volume are obtained through sensors and uploaded to the ground monitoring platform. When the shaft temperature exceeds the specified value, the gate opening does not meet the requirement, and the current and voltage do not meet the requirements, an alarm message will appear.

7. The intelligent mine ventilation system according to claim 1, characterized in that: The three-dimensional software platform is established in the analysis and decision-making platform, and supports information management, realizes the "one-key wind measurement" function, automatic generation of ventilation reports, automatic drawing of ventilation stereograms and ventilation network diagrams, online dynamic management of ventilation system diagrams, and three-dimensional visualization of ventilation systems, and real-time display of the distribution of ventilation parameters at various air-using locations in the mine. At the same time, the ventilation information management platform can integrate data such as safety monitoring, optical fiber temperature measurement, and bundle tube monitoring, and can analyze various fire monitoring data and analyze and warn of mine fires.

8. The intelligent mine ventilation system according to claim 1, characterized in that: The analysis and decision-making platform also includes real-time solution of the ventilation network and an intelligent ventilation system control system, wherein association rules between sensor data and ventilation alarm and ventilation control are established in the real-time solution of the ventilation network, and user-defined rule settings are supported. Alarm levels and control targets are set for different gas concentrations and air volumes, fires, and equipment failures. In the intelligent ventilation system control system, auxiliary decisions on monitoring point layout, auxiliary decisions on wind window adjustment positions and adjustment amounts, auxiliary decisions on ventilation power adjustment, intelligent diagnosis of ventilation power failures, intelligent diagnosis of ventilation facility failures, and ventilation network failure diagnosis functions can be realized. Based on the perception information, the underground dampers and wind windows are intelligently opened, closed, and adjusted, realizing remote centralized control and remote start and stop functions of underground local ventilators, and realizing monitoring, surveillance, and supervision.

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