Coal mine gas detection and early warning intelligent control system based on 5G communication technology

Abstract

The invention relates to the technical field of coal mine security and protection, in particular to a coal mine gas detection and early warning intelligent control system based on the 5G communication technology. The invention aims to provide a coal mine gas detection and early warning intelligent control system based on a 5G communication technology in order to overcome the defects existing in an existing coal mine underground working face coal mine gas detection and control system. The system is suitable for effectively detecting the concentration of the combustible gas on the working face in the coal mining process, accurately, intelligently and quickly reducing the concentration of the combustible gas exceeding the set concentration, and transmitting the real-time concentration of each detection point on the working face to the central control system for display. The gas detector can conveniently and directly check the gas concentration of each gas detection point in a monitoring room, time and labor are saved, the safety is good, and the gas detector is convenient to popularize and use. And life and property safety of workers on the mine working face is guaranteed.

Description

Technical Field

[0001] The patent of this invention relates to the field of coal mine security technology, specifically an intelligent control system for coal mine gas detection and early warning based on 5G communication technology. Background Art

[0002] Analysis of numerous coal mine gas explosion incidents reveals that coal mine gas concentration increases exponentially before an explosion. Therefore, undetected coal mine gas poses a significant safety hazard to coal mines and all workers. Intelligently reducing coal mine gas concentration before it reaches 10% of the lower explosion limit is a crucial measure for protecting the lives and property of coal mine workers. The government has established strict regulations on coal mine gas concentrations during underground mining. In mining face operations, wired communication media such as optical fibers are susceptible to damage during the movement of large mobile equipment, making long-term stable deployment impossible. Furthermore, the large operating range of auxiliary transportation equipment such as vehicles precludes extensive wiring for remote control. Therefore, wireless communication is a suitable communication method for coal mine gas detection. After evolving through wired or narrowband wireless communication technologies, such as wired, leaky, PHS, 2G, and 3G, mining communication technology has entered the development phase of broadband wireless communication, starting with the 4G era. Currently, the mainstream broadband wireless communication technologies are 4G, WiFi6, and 5G. However, the 4G air interface time-domain frame structure consists of 1ms subframes, with a radio frame period of 10ms. Combined with the core network's transmission design, latency typically exceeds 100ms, making it difficult to meet the low-latency requirements of real-time coal mine gas monitoring. WiFi6 technology offers high-bandwidth transmission capabilities, but as a wireless communication technology operating in unlicensed frequency bands, it must share wireless channel resources with Bluetooth, ZigBee, and other WiFi technologies, as required by radio management regulations. Therefore, it cannot fully occupy the channel. Before each channel access, it must perform a Listen Before Talk (LBT) mechanism. Furthermore, if the channel occupancy time reaches the specified time threshold, the wireless channel resources must be released. Therefore, WiFi6 technology has inherent bottlenecks in latency and reliability, making it unsuitable for remote control applications for mining equipment. 5G for mining provides a high-speed information transmission channel for the construction of smart mines. The intelligent control system for coal mine gas detection and early warning based on 5G communication technology is a key means to achieve less-manned or unmanned mine production.

[0003] Whether a coal mine has an intelligent coal mine gas detection and early warning control system directly reflects the mine's intelligence level. According to regulations of the Ministry of Emergency Management, gas alarm concentrations and power-off concentrations vary at different locations on the working face of a mine, ranging from 0.5% to 1.5%. Traditional coal mine gas detection and control systems have a low level of automation. Traditional coal mine gas detection relies on setting up gas monitoring points and conducting three-eighth inspections, with one inspection per shift every 6-10 hours. However, traditional coal mine gas detection and control systems are not only unable to monitor gas concentrations at the working face in real time and transmit this information to the central control system, but also impose heavy and time-consuming inspection tasks on gas inspectors. Furthermore, underground working conditions in coal mines are harsh and unsafe. Furthermore, they are unable to quickly reduce gas concentrations when they exceed the set level, posing a significant safety hazard. Summary of the Invention

[0004] The purpose of the present invention is to address the deficiencies in existing coal mine gas detection and control systems for underground working faces in coal mines, and to provide an intelligent control system for coal mine gas detection and early warning based on 5G communication technology. The system is suitable for effectively detecting the concentration of combustible gas on the working face during coal mining, while accurately, intelligently and quickly reducing the concentration of combustible gas that exceeds the set concentration, and transmitting the real-time concentration of each detection point on the working face to the central control system for display, so that gas inspectors can directly view the gas concentration at each gas detection point in the monitoring room, saving time and effort, and having good safety, which is easy to promote and use. It ensures the safety of life and property of workers on the working face of mines.

[0005] An intelligent control system for coal mine gas detection and early warning based on 5G communication technology consists of three subsystems: a coal mine gas concentration detection system, a data transmission system, and an intelligent integrated management and control system. The entire system is connected to an intelligent integrated management and control platform for coordinated control. The coal mine gas concentration detection system comprises a coal mine gas concentration sensor module, an A / D converter module, a blower module, indicator lights, and a power supply. The data transmission system comprises a single-chip microcomputer information processing module (slave) and a ZigBee wireless signal transmission and reception module. The central control system comprises a single-chip microcomputer information processing module (master), an LCD display module, an alarm module, and a keypad module. The coal mine gas concentration detection system collects real-time coal mine gas concentration data from the working face. This information is converted by an A / D conversion module and transmitted to the MCU information processing module (slave). The MCU processing module (slave) then transmits the signal to the MCU processing module (master) via a ZigBee wireless signal transmitter. When the concentration signal reaches the set level, the MCU processing module (master) controls the MCU information processing module (slave) to activate the blower module, which uses a PID algorithm to control air volume, reducing the coal mine gas concentration in the monitoring area. Simultaneously, all supporting blowers in the return airway are activated to exhaust the coal mine gas through the return airway. The system displays the coal mine gas concentration in real time on an LCD display module for monitoring purposes. The chute monitoring center also uses 5G homogeneous technology to transmit coal mine gas concentration information to the intelligent integrated management and control platform. Based on this information, the intelligent integrated management and control platform uses 5G communication technology to control the air volume of the blowers in the working face in real time, achieving precise and intelligent reduction of combustible gas concentration.

[0006] Beneficial effects: This invention has a high level of automation and can monitor the working face in real time. This significantly reduces the risk for personnel performing coal mine gas monitoring tasks. It also intelligently reduces coal mine gas concentration immediately, effectively preventing coal mine gas from reaching its minimum explosive concentration and implementing a series of control measures, thus ensuring the safety of life and property of coal mine workers. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 This is the structural diagram of the intelligent control system for coal mine gas detection and early warning at the working face; Figure 2 This is a schematic diagram of the layout structure of the intelligent control system for coal mine gas detection and early warning at the working face; Figure 3 Arrange a distribution map for the intelligent control system of coal mine gas detection and early warning at the working face; 1. Top beam 2. Guard plate 3. Combustible gas sensor 4. Vertical column 5. Tail beam 6. Base 7. Smart fan 8. Pushing device 9. Rotatable hanging arm. DETAILED DESCRIPTION

[0008] A coal mine gas concentration detection system is installed for every support device on the working face. It monitors the combustible gas concentration on the working face in real time. When the concentration is too high, the intelligent fan module reduces the coal mine gas concentration and simultaneously issues an audible and visual alarm to warn personnel on the working face. The coal mine gas concentration detection system consists of an intelligent coal mine gas detection group and an intelligent blower device group arranged in a cross pattern. The intelligent coal mine gas detection equipment group contains a coal mine gas sensor device with a detachable design, which can accurately detect coal mine gas and quickly repair and replace it, ensuring the normal operation of coal mine gas detection and early warning devices on different working faces. The intelligent blower device group uses a rotatable hanging arm to adjust the wind direction to blow towards the contaminated air lane, and controls the air volume through a PID control algorithm, automatically reducing the combustible gas concentration, effectively preventing the combustible gas from reaching the minimum explosion concentration. At the same time, the air volume is controlled to avoid the generation of dust caused by excessive air volume.

[0009] The coal mine gas concentration detection system is arranged on the top beam of the hydraulic support. Due to the complex environment of the coal mining working face, the coal mine gas sensor uses a detachable sensor, which greatly reduces the time spent on repairs when the sensor fails, ensures the safe progress of mining work on the working face, and improves work efficiency while protecting the lives and property of workers.

[0010] The data transmission system is located at the chute monitoring center. When the combustible gas concentration signal from the combustible gas concentration detection system exceeds the set concentration, the data transmission system controls the single-chip microcomputer information processing module (slave) to activate the blower module to reduce the coal mine gas concentration in the area where the monitoring point is located. It also activates all supporting blowers in the return airway to exhaust the coal mine gas through the return airway. The coal mine gas concentration is displayed in real time on the LCD display module for monitoring by staff. Simultaneously, coal mine gas concentration information is transmitted to the intelligent integrated management and control platform via the 5G communication system. Based on this information, the intelligent integrated management and control platform can control the blower air volume at the working face in real time, achieving precise and intelligent reduction of coal mine gas concentration and effectively ensuring safe production. The intelligent integrated management and control system, located on the ground, analyzes coal mine gas concentration at each monitoring point in the mine and comprehensively manages the air volume of each blower to ensure safe operations at the working face in real time.

[0011] In order to realize the continuous monitoring and data collection of coal mine gas concentration parameters at the working face, the main hardware facilities of the coal mine gas concentration detection system, data transmission system and intelligent integrated management and control system include data acquisition server, data processing server and management terminal computer. The data acquisition server is located at the coal mining working face, the data processing server is located at the chute monitoring center, and the management terminal computer is located on the ground.

[0012] The data acquisition server includes a central processing unit (slave), an A / D conversion module, a ZigBee wireless signal transmitting and receiving module and a sensor module, an intelligent fan module and an audio and visual alarm module. The A / D conversion module is connected to the sensor module and is responsible for converting the analog signal transmitted by the sensor module into a digital signal for the central processing unit (slave) to read. The ZigBee wireless signal transmitting and receiving module is connected to the central processing unit (slave). The central processing unit (slave) can directly control the ZigBee wireless signal transmitting device to transmit and receive signals through the wide pin. When an alarm signal is transmitted from the data processing server, the audio and visual alarm module is activated, and the intelligent fan module is started at the same time.

[0013] The data processing server includes a central processing unit (CPU), a ZigBee wireless signal transmission and reception module, an LCD display module, a keypad module, and an audio and visual alarm module. The keypad module can set the alarm concentration. The ZigBee wireless signal transmission and reception module is responsible for receiving data from the slave device and sending it to the CPU (CPU). The CPU controls the LCD display module to display the data in real time and compare it with the set alarm concentration. If the alarm concentration is exceeded, an alarm signal is sent to the data acquisition server and the audio and visual alarm module is activated. At the same time, real-time coal mine gas concentration information is sent to the management terminal computer on the ground via 5G communication technology. If it is not exceeded, the system continues to maintain standby detection status.

[0014] The management terminal computer is located on the ground and directly processes the real-time combustible gas concentration information transmitted by the data processing server. Based on this information, it coordinates the management of fans and personnel dispatch at each monitoring point through 5G communication technology.

[0015] Each sensor is directly connected to the central processor (slave), and then connected to the central processor (host) through the ZigBee wireless signal transmission and reception module. Several data acquisition servers are connected to the data processing server. The data processing server is wirelessly connected to the management terminal computer through 5G communication technology and is operated through the management terminal computer connected to the data acquisition server, thereby realizing the collection, monitoring, supervision and management of the most common combustible gas in coal mines: coal mine gas concentration data.

[0016] The data processing server can send execution commands based on information provided by the data acquisition server, controlling the intelligent fans and the sound and light alarm modules. When the preset alarm concentration is reached, the intelligent fans are turned on to provide early warning and control of coal mine gas. Simultaneously, the sound and light system will sound an alarm to alert the workers on the working face, protecting their lives and property. Furthermore, the data acquisition server on the working face will provide real-time feedback on the concentration information after measures have been taken to reduce the concentration to the information processing server. The information processing system then processes this information and provides it to the information acquisition system for further processing. Simultaneously, the management terminal computer controls the relevant equipment on the working face to make adjustments, forming a closed-loop system to ensure optimal control of coal mine gas on the working face.

[0017] In addition to being controlled through the information control system, the intelligent control system for coal mine gas detection and early warning can also be manually controlled according to the actual situation of the working face. In the event of an unexpected situation, it can also ensure the normal operation of the entire system and protect the personal safety of the working face personnel.

[0018] The intelligent control system for coal mine gas detection and early warning will also be connected to the comprehensive intelligent integrated management and control platform. Staff can coordinate and control the entire system through 5G communication technology on the management and control platform, which greatly improves the automation level of coal mines, reduces the burden on staff, ensures the safety of life and property of coal mine workers, and improves the intelligence level of coal mines.

Claims

1. An intelligent control system for coal mine gas detection and early warning based on 5G communication technology. It consists of three subsystems: a coal mine gas concentration detection system, a data transmission system, and an intelligent integrated management and control system. The entire system is connected to an intelligent integrated management and control platform, which provides overall coordination and control. The coal mine gas concentration detection system consists of a coal mine gas concentration sensor module, an A / D conversion module, a blower module, an indicator light, a power supply, etc. The data transmission system is composed of a single-chip information processing module (slave), a ZigBee wireless signal transmitting and receiving module, etc. The central control system is composed of a single-chip information processing module (host), an LCD display module, an alarm module, a button module, etc. The coal mine gas concentration detection system collects coal mine gas concentration information at the working face in real time, converts the collected information through the A / D conversion module and transmits it to the single-chip computer information processing module (slave), which then sends the signal to the single-chip computer processing module (host) through the ZigBee wireless signal transmitter. When the concentration signal reaches the set concentration, the single-chip computer processing module (host) controls the single-chip computer information processing module (slave) to start the blower module and use the PID algorithm to control the air volume, thereby reducing the coal mine gas concentration in the area where the monitoring point is located. At the same time, all supporting blowers in the return air lane are started to discharge the coal mine gas through the return air lane, and the coal mine gas concentration is displayed in real time on the LCD display module for monitoring by staff. At the same time, the chute monitoring center uses 5G homogeneous technology to send coal mine gas concentration information to the intelligent integrated management and control platform. The intelligent integrated management and control platform can use 5G communication technology to control the blower air volume of the working face in real time based on this information, so as to achieve the purpose of accurately and intelligently reducing the concentration of combustible gas.

Images