The underground personnel safety positioning system of Shanghai Xiupai Coal Mine was successfully applied in Luliang, Shanxi
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Successful application of Liulin Mine in Luliang, Shanxi
The KJ-19 underground personnel and equipment positioning system can timely and accurately reflect the dynamics of personnel and equipment in various areas of the underground to the ground computer system, so that managers can grasp the distribution of underground personnel and equipment and the movement trajectory of each miner at any time , In order to facilitate more reasonable scheduling management. When an accident occurs, rescuers can also quickly understand the location of relevant personnel based on the data and graphics provided by the KJ-19 underground personnel and equipment positioning system, and take corresponding rescue measures in time to improve the efficiency of emergency rescue work.
The KJ-19 downhole personnel and equipment positioning system is a comprehensive application system integrating downhole personnel attendance, tracking and positioning, post-disaster first aid, daily management, etc. It integrates the top domestic identification technology, transmission technology, software technology and other top products and technologies. It is currently the most advanced, most stable, and most professionally designed underground personnel positioning system in China. The realization of this scientific and technological achievement will bring new opportunities for the safety production and daily management of coal mine enterprises as well as emergency first aid.
1 Functions and features
1.1 Features
ü Real-time dynamic display function of underground personnel:
l Any timeHow many people are there in a certain place in the mine, and who are these people?
l Query the actual position of one or more personnel in the mine
l Record the arrival of relevant personnel at any location/A series of information such as departure time and total working hours can be used to supervise and confirm whether important inspectors (such as gas detection personnel) conduct on-site inspections on time and on-site, or conduct various data detection and processing, and fundamentally eliminate them as much as possible Related accidents caused by human factors
l Multi-point sharing can be realized for multiple leaders to view at different locations at the same time
ü Rich map functions:
With functions such as zoom in, zoom out, move, ruler distance measurement, field of view control, center movement, soil layer control, map printing, etc.
ü Forbidden zone alarm function:
For the designated restricted area, if a person enters, the real-time sound alarm will be displayed and the person entering the restricted area will be displayed
ü Personnel track query:
Can find the path that a person has gone through in a certain period of time, and draw the line trajectory in the picture
ü Abundant personnel’s ability to go down well to check on work attendance:
Statistics of personnel entering and exiting wells can be realized, attendance records of personnel entering and exiting wells can be realized, and various information reports of personnel entering and exiting wells can be established (such as:Downhole time report, attendance monthly report, overtime report, absence report, etc.)
ü First aid information after the disaster:
In the event of various accidents, the upper computer can immediately display the number of personnel, personnel information, and personnel location at the accident site, which greatly improves rescue efficiency and rescue effectiveness
ü Vehicle and equipment management:
Vehicle access statistics, positioning, and the specific location of other important equipment
1.2 performance
Powerful system processing capabilities:
ü useLH scheduling algorithm optimizes system data processing capacity
ü Highly automated
ü based onGeographic information display and query system based on GIS technology
ü Complete data analysis capabilities
ü Long communication distance, up to20 kilometers
Excellent recognition performance:
ü High recognition reliability,100% front-end recognition rate
ü Long recognition distance (recognition distance up to10-30 meters above)
ü Very high anti-collision (each detection point can be identified at most at the same time200 people)
ü High recognition stability (bit error rate is less than1 in 100,000)
ü Fast recognition speed (the fastest achievable200 km/h recognition speed)
On-site advantages:
ü Environmental adaptability: high anti-interference, no special requirements for underground interference sources and perimeter environment
ü Installation convenience: sensor integrated structure design, no need for external antenna or ground sense
ü Operational reliability: highly integrated internal circuits, minimizing device failure rate
Electrical characteristics:
ü Ultra-low power consumption, the wireless tag can work continuously without changing the battery5 years
ü Convenience and safety, the label does not need an external miner’s lamp power supply, no need to charge, no need to replace the battery
ü No radiation, no impact on human body and environment, safer and healthier
2 System composition and working principle
2.1 System composition
KJ-19 underground personnel and equipment positioning system equipment mainly includes: central station host, KJJ-1200 data communication box, BFDZ-2 multifunctional substation, KWB-10 coal mine wireless identification sensor and JHWK coal mine wireless identification Card.
2.2 working principle
First of all, place a certain number of people in the areas and roadways that need to be tracked in the underground according to the specific needs of the site.KWB-10 type wireless identification sensor, under normal circumstances, only one location needs to be placed to track the situation of people entering and leaving the location. Connect the KWB-10 wireless identification sensor to the ground computer through the transmission bus, and at the same time connect the BFDZ-2 multi-function substation to the KWB-10 wireless identification sensor to provide working power. In this way, a system is set up in which the underground computer is connected to the underground wireless identification sensor through a cable.
Then wear one for the downhole personnel who need to track and locate personnelJHWK wireless identification card, when the downhole personnel enter the well, as long as they pass or approach any KWB-10 wireless identification sensor placed in the tunnel, the KWB-10 wireless identification sensor will immediately sense the signal and upload it to the central station host. In this way, the software of the central station host computer can determine the specific information (such as: who, where, and the specific time), and at the same time can display it on the large screen of the control center or the computer display screen, and make a backup.
Managers can view a certain area according to the distribution diagram on the large screen or on the computer, and the computer will then count and display the personnel in this area. The central station host computer will sort out various attendance reports of each underground worker in this period according to the personnel access information for a period of time.
3 Main technical indicators of each equipment
3.1 System technical indicators
ü The single-line system capacity is42 wireless identification sensors, with a dual-wire system capacity of 84 wireless identification sensors
ü The maximum transmission distance is20 kilometers
ü There is no limit to the number of wireless identification cards that can be tracked
3.2 KJJ-1200 data communication box
The KJJ-1200 data communication box is a mine-used intrinsically safe data communication box. It is placed next to the ground computer during work. Its main function is to amplify the communication signal and enhance the communication distance. At the same time, it realizes the ground host and underground KWB -10 Wireless identification of data communication between sensors and sending control commands, generally one set of system configuration is enough.
Its explosion-proof mark isExdibI (150°C). The working voltage is 220V, and the maximum current consumption is 100mA. The working current of the intrinsically safe terminal is 18mA, the short-circuit current is 30mA, and the maximum voltage is less than or equal to 15V PP. The transmission signal is the baseband SDLC method. Parameters of the communication cable connected with the underground KWB-10 wireless identification sensor: ①Cable model: MHYVRP1×2×7/0.52 ②Cable distributed capacitance: 0.06nF/Km ③Cable distributed inductance: 0.8mH/Km ④Cable DC resistance: 13.5Ω/ Km. The maximum transmission distance is 20Km. Working condition requirements are: ambient temperature 0℃-40℃, relative humidity 75%, ambient pressure 80-106KPa.
3.3 BFDZ-2 multifunctional substation
The BFDZ-2 multifunctional substation is mainly used as a KWB-10 wireless identification sensor to provide power, which is completely suitable for explosive gas environments containing coal dust and gas. The explosion-proof form is mine explosion-proof and intrinsically safe, with explosion-proof signs It is ExdibI (150°C).
Conditions of use: ambient temperature0℃-40℃, relative humidity≦96%, ambient pressure 80-106Kpa; input voltage: ~660V/380V, 50HZ; output circuit: three circuits of intrinsically safe 18V, each can be connected to two identification sensors; and KWB-10 The connection cable model/specification of the wireless identification sensor: MHYVR1×2×7/0.52.
3.4 KWB-10 wireless identification sensor
The KWB-10 wireless identification sensor for coal mines is a kind of radio frequency identification equipment, which is specially used to identify the wireless identification card worn by personnel, and is installed in the roadway where the personnel need to be detected.
The biggest feature of the KWB-10 wireless identification sensor for coal mines is that it can identify many wireless identification cards quickly and reliably in a large range at the same time, and has the advantages of micro power, high recognition rate, high anti-interference, stability and reliability. Moreover, the structure design is reasonable, the volume is small, and it is very easy to install and maintain.
Main Specifications:
ü Recognition distance:10-30m adjustable
ü Recognition speed:Within 200km/h
ü Anti-conflict: can be identified at the same timeLess than 200 wireless tag cards
ü working frequency:2.4GHz-2.5GHz ISM microwave band, 125 channels, channel bandwidth 8MHz
ü RF power:-20dBm-0dBm adjustable, the maximum peak power is 1 milliwatt
ü Receiving sensitivity:-90dBm
ü Working temperature:-40℃-60℃
ü powered by:18V DC
ü Maximum working current:<100mA
3.5 JHWK wireless identification card for coal mine
The JHWK wireless identification card for coal mines is an electronic tag specially used for identification by the wireless identification sensor, which is worn by miners when they go down the shaft.
It is an active radio frequency identification card with an intrinsically safe circuit design.JHWK type wireless identification cards for coal mines also use SUPER-RFID technology from Supai. The biggest feature of this product is that multiple tags can be identified simultaneously in a larger range, and it has the advantages of wireless micro power, stability and reliability, and is small in size and easy to carry or place.
main indicators:
ü Standard size:60×35×6mm
ü Recognition distance:30-50m adjustable
ü working frequency:2.4GHz-2.5GHz ISM microwave band, 125 channels, channel bandwidth 8MHz
ü RF power: less than-3dBm
ü Receiving sensitivity:-90dBm
ü Working temperature:-40℃-60℃
ü Working current: less than5uA
ü ID number is unique in the world
ü One-time battery lifeMore than 5 years
Annex 1. System design concept
1.System design principles
1-1 Realize the effective identification of the entry and exit of the working surface of the underground tunnel, so as to fully reflect the system management” Humanization, informationization and high degree of automation”
1-2 Provide senior management personnel with information inquiries on attendance, personnel entry and exit restrictions and other aspects.
1-3 Once a safety accident occurs, the system can immediately know the staff’s Quantity, to ensure the efficient operation of emergency rescue and safety rescue work.
1-4 After a safety accident occurs, the mobile identification device of this system can detect the presence of people within 10 meters of the accident site, which is convenient for the timely deployment of rescue work.
1-5 The safety, scalability, easy maintenance and easy operation of the system design.
2. System design basis
(1) GA/T75 “Procedures and Requirements for Safety Protection Engineering”
(2) MT209-1990 “General Technical Requirements for Electrical and Electronic Products for Coal Mine Communication, Testing and Control”
3. System design features
(1) Highly automated. The system can automatically detect the time and location information of the underground tunnel workers passing the monitoring point, and automatically realize the statistics and management of attendance operations.
(2) Advanced communication system. The identification system installed in each channel of the underground mine transmits the data passed by relevant personnel to the network server in real time, without human intervention in the whole process.
(3) Complete data statistics and information query software. The system software has a dedicated database management system, including the information collection and statistical analysis system for workers passing through the tunnel, the statistical and management analysis system for attendance operations, display and print various statistical reports, and provide a full range of services for senior management inquiries and management .
(4) The safety, stability and reliability design of the system. The system products adopt the tunnel wall-mounted design, no need to carry out on-site construction in the tunnel, and ensure that the system operates continuously and normally for 24 hours in harsh environments;
(5) Complete alarm call system configuration for abnormal conditions (including invalid sensor and invalid sensor entry).
4. System design plan
This system follows the principle of “unified sensor distribution, unified equipment, unified management”, and implements the “one person, one sensor” system according to the permission of staff and teams. The sensor can be regarded as a “post certificate” or “tunnel access certificate” . The specific plan is as follows:
(1) The coal mine production unit installs a certain number of signal transceivers in all tunnels, and the specific location is determined according to the site conditions to meet the radiation area.
(2) The coal mine production unit issues and equips the relevant personnel with sensors, which are installed in suitable positions of the safety helmets.
(3) When sending the sensor, log in the basic information of the employee corresponding to the sensor, including name, age, gender, team, type of work, position, photo, etc., in the system database.
(4) The sensor will become effective after the safety production department authorizes the sensor. The scope of authorization includes: the employee can be qualified to enter the tunnel on the work surface, the time limit, failure, and loss of the sensor, etc., to prevent irrelevant and illegal persons from entering the tunnel;
(5) Personnel entering the tunnel must wear safety helmets equipped with sensors. When the person passes the identification monitoring point of the tunnel, he is immediately recognized by the system, and through the information exchange of the system network, the information such as the road section and time passed by the person is transmitted to the well safety monitoring center for record, and can be recorded on the large geographic information screen at the same time A prompt message appears on the wall, showing the name of the passing person. If the sensor number that is sensed is invalid or enters a restricted channel, the system will automatically alarm, and the security monitoring center staff on duty receives the alarm signal and immediately executes the relevant safety work management procedures.
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