Positioning of underground personnel in coal mines

System background:
In recent years, the number of high-gas mines in coal mines has been increasing. How to strengthen safe production and improve the efficiency of search and rescue work has been put in front of the competent authorities and leaders at all levels of the country. When we analyzed the recent major accidents in several coal mines, we found that:
(1) The information communication between the ground and underground personnel is not timely;
(2) It is difficult for surface personnel to dynamically grasp the distribution and operation of underground personnel in a timely manner, and to accurately locate personnel;
(3) Once a coal mine accident occurs, the efficiency of emergency rescue and safety rescue is low, and the search and rescue effect is poor.
For this reason, how to correctly handle the relationship between safety and production, safety and benefit, how to accurately, real-time, and quickly perform coal mine safety monitoring functions, effectively manage miners, and ensure the efficient operation of emergency rescue and safety rescue is particularly important and urgent. Facing the new situation, new opportunities and new challenges, the leaders of the national competent departments at all levels put forward high requirements and expectations for work safety. We believe that improving the level of information management of production safety and strengthening the long-term safety production mechanism with disaster prevention and search and rescue as the main goals are the only way for my country’s production safety work.
During the “Tenth Five-Year Plan” period, the electronic information construction of the coal industry was based on the development of the “Ninth Five-Year Plan”, centered on the strategic tasks of reform and development of the coal industry, focused on the development and utilization of information and knowledge resources, and combined with the actual needs of the coal industry. The informatization construction of coal mine production safety monitoring and control, automatic control and enterprise management systems has been incorporated into the operation and management schedule of safety production enterprises. To this end, Beijing Lingqiang Technology Co., Ltd., on the basis of summarizing the experience of radio frequency identification technology, adopts coal mine explosion-proof and intrinsically safe dynamic target recognizer and intrinsically safe identification card to develop and design the “coal mine personnel monitoring and underground positioning tracking” Management system”. The above-mentioned management system organically combines cutting-edge long-distance radio frequency identification technology, network communication technology and automatic control technology, and solves the problem that the system products are used in the safe operation of equipment underground in coal mines, network data communication, long-distance data transmission, signal conversion interface and Technical problems in information processing and other aspects will provide effective scientific and technological support for underground coal mine personnel monitoring, control, monitoring and tracking management, as well as production statistics management, etc., and will forcefully promote the economic development of coal mine enterprises.

Design principles of underground positioning system:
1) Realize the effective identification and monitoring of the entry and exit of coal mine operators, so that the management system fully reflects “humanization, information and high automation”, and realizes the goal of digital mines.
2) Provide coal mine managers with various management information such as personnel entry and exit restrictions, attendance operations, monitoring and monitoring, etc. Once a coal mine safety accident occurs, the system can immediately know the personnel and their numbers on the operation surface to ensure emergency relief and safety rescue Wait for the efficient operation of search and rescue work.
3) The safety, scalability, easy maintenance and easy operation of the system design.

System design features:
Design the geography information topographic map of the underground tunnel, which can infinitely enlarge and query various materials and information around the tunnel, such as fire and rescue, production equipment distribution information, tunnel environment information, and personnel distribution information. The main tunnel is equipped with monitoring equipment, and the actual map of the tunnel environment photographed in advance can also be stored on the topographic map to provide the management personnel with information inquiries.
If a safety accident occurs, the query system can know the number of people in the tunnel, the location of the entrance and exit, the location of the accident, the location of the remote equipment and other information to ensure the efficient operation of rescue and disaster relief.
The specific features are as follows:
1) Highly automated. The system can automatically detect the time and location information of the underground tunnel personnel passing the monitoring point, and automatically realize the personnel’s attendance operation, statistics and monitoring management.
2) Advanced communication system. The wireless information collection equipment installed in the various channels of the coal mine will transmit the collected information to the dedicated processing and transmission substation in real time, and transmit the data passed by the relevant personnel to the network server on the ground in real time through the underground field bus (RS485 or DPSK). The whole process does not require human intervention.
3) Complete data statistics and information query software. The system software is equipped with a dedicated database management system, including information collection and statistical analysis system for workers passing through tunnels, statistical and management analysis system for attendance operations, display and printing of various statistical reports, and provide a full range of queries and management for senior management Serve.
4) The safety, stability and reliability design of the system. The system product adopts a tunnel wall-mounted design to ensure that the system can continue to operate normally in harsh environments and provide power supply for 2 hours after power failure.
5) Complete alarm call system configuration for abnormal conditions (including illegal entry without card, invalid card, invalid card, and blacklist card entry).
Schematic diagram of positioning and monitoring of underground personnel