Shuo Teng mobile data acquisition terminal helps coal mine hidden dangers investigation system solution
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At present, most coal mine enterprises use information technology to establish a complete set of hidden danger investigation system, but the underground environment is harsh, the geological conditions are complicated, and there are a lot of blind spots. At the same time, because the system network has not been extended to all areas of the underground mine, most of the hidden danger investigations rely on manual recording and then input into the system, which easily leads to the distortion of the hidden danger information description and the delay of information transmission. This paper proposes to apply mobile data collection terminals in the process of closed-loop management of hidden dangers, use mobile data collection terminals to realize functions such as fast entry of hidden danger information, take pictures, and upload data through WiFi or Bluetooth, so that hidden danger scenarios can be truly reproduced and the cycle of hidden danger closed-loop process can be shortened. Improve the efficiency of hidden danger investigation and reduce the cost of hidden danger investigation of coal mining enterprises.
1. Coal mine hidden danger investigation system
The coal mine hidden danger investigation system is a pre-risk control information system integrating hidden danger information database, hidden danger closed-loop management, “three violations” management, early warning management, data analysis, and terminal display. Its core is based on the PDCA proposed by American quality management expert Deming (Plan-Do-Check-Action, Plan-Do-Check-Action, Plan-Do-Check-Action) Closed-loop management of hidden dangers of the cyclic concept. At present, many coal mining companies have proposed a closed-loop management model of hidden dangers, and strengthened the monitoring and rectification of hidden dangers. Combining the characteristics of coal mining enterprises, the closed-loop management mode of hidden dangers mainly refers to the timely collection and reporting of various hidden dangers in the safety production process of coal mining enterprises, and notify the relevant responsible units to rectify within a time limit, and the relevant persons in charge will carry out on-site treatment according to the predetermined hidden danger management measures. After that, the safety supervision department is notified, and the safety supervision department conducts a timely on-site review of the hidden dangers that have been managed. The hidden dangers that have passed the review are closed and a new closed-loop process is carried out. If the review fails, the relevant responsible units will be ordered to continue the management. A complete closed-loop management process of hidden dangers mainly includes 5 steps of hidden danger reporting, hidden danger review, hidden danger management, governance response, and on-site review. The hidden dangers that fail the on-site review will continue to enter the hidden danger management process.
2. The hidden danger investigation function of the underground mobile data collection terminal
Soteng mobile data collection terminal refers to a data processing terminal equipped with an embedded operating system that is easy to carry. According to the field of use, it can be divided into industrial grade and consumer mobile data collection terminals. The underground mobile data acquisition terminal belongs to the industrial grade, which is strong, durable and able to work continuously in harsh environments, and must be certified for coal mine safety. At present, most mobile data collection terminals are mainly equipped with Android operating system and adopt a closed design, which has the characteristics of moisture-proof, shock-proof, dust-proof and high-temperature resistance, and is convenient to use in harsh environments; in addition to common functions such as WiFi and Bluetooth communication, In order to meet the needs of underground hazard investigation, it is also necessary to have LED supplementary light to enhance the camera function, built-in radio frequency identification (RFID) card reading function, infrared temperature measurement, automatic gas concentration detection and other functions. The mobile data collection terminal is the link between the hidden hazard inspection system and underground hazard inspection, and it plays a huge role in the three steps of hidden hazard closed-loop management of hidden hazard reporting, treatment response, and on-site review.
2. 1 Basic information maintenance
Before using the mobile data collection terminal for underground hazard investigation, the basic information of the underground hazard investigation system must be synchronized to the mobile data acquisition terminal on a regular basis. Basic information includes personnel information (RFID personnel card), location information (RFID location card), department information, and safety hazard information database. The department information mainly includes the responsible unit, rectification unit, and review unit information, which can be associated with RFID personnel cards and RFID location cards. The safety hazard information database includes hidden hazard majors (coal mining, tunneling, “one ventilation and three prevention”, ground survey and prevention of water, electromechanical, transportation, etc.), hidden hazard level (ABC level), hidden hazard description (text, picture, video) and related rectification measures . The hidden danger information database can be divided into common hidden danger information database and standard hidden danger information database according to the category. The common hazard information database can summarize information on hidden hazards that usually occur frequently based on the coal mine enterprises’ own conditions and historical experience; the standard hidden hazard information database can form a complete set of hidden hazard governance standard systems based on the experience and lessons of the national large-scale coal mine companies in the management of hidden hazards.
2.2 Collection and reporting of hidden danger information
The mobile data collection terminal quickly and accurately describes the location of hidden dangers and the occurrence of hidden dangers through text, pictures, etc. The collection of hidden danger information can be divided into manual collection and automatic collection. Automatic collection is mainly for gas concentration monitoring. When investigating hidden dangers underground, safety supervisors generally need to spot check whether the gas concentration in certain areas exceeds the standard. The mobile data collection terminal automatically collects gas concentration and other data. When an abnormality occurs, the mobile data collection terminal automatically alarms according to the level of gas concentration exceeding the standard, and automatically forms a hidden danger message for the area with too high level, so that the relevant responsible unit can manage it in time. Manual collection refers to the collection of relevant information by safety supervisors carrying mobile data collection terminals to scan RFID location cards and RFID personnel cards. When reproducing the real situation of the scene, due to factors such as the dimness of the underground mine and network limitations, the video shooting is unclear and cannot be uploaded in time. The safety supervision personnel determine the hidden danger information by taking pictures and quickly inputting the hidden danger code or level. After collecting the hidden danger information, the safety supervision personnel need to upload it to the well in order to review it in time and notify the relevant responsible unit of rectification within a time limit. Safety supervisors can upload data through WiFi near the underground base station, or use Bluetooth to realize point-to-point transmission of data between two mobile data collection terminals during shift shift, one uploads data in the well, and the other continues to carry out underground hazard investigation.
2. 3 Hidden danger information governance response and on-site review
The mobile data collection terminal plays basically the same role in the governance response and on-site review steps (the governance response is carried out by the person in charge of the responsible unit, and the on-site review is carried out by the safety supervisor). After the rectifier of the responsible unit has finished correcting the hidden danger, the relevant responsible person checks whether the governance situation meets the requirements. If it meets the requirements, the safety supervisor will conduct an on-site review. If the governance fails, the rectifier of the responsible unit will be notified to continue the governance. Before going down the well, the safety supervision personnel can synchronize the related hidden danger management information through the WiFi network. If there is hidden danger information to be solved after going down the well, the hidden danger investigation system can be attached to the personnel positioning system to actively send data to the corresponding underground mobile data collection terminal , And notify relevant personnel by voice call. Safety supervisors can also determine the results of the review based on pictures and text. If the review is passed, the closed-loop management will be terminated, and if the review fails, it will continue to enter the hidden danger management process.
3. Recommendations for underground applications of mobile data collection terminals
3.1 Establishment of hidden danger information database
The integrity of the hidden hazard information database is an important guarantee for coal mining enterprises to investigate hidden hazards, and it is also an important prerequisite for the quick and convenient entry of mobile data collection terminals. From the perspective of mobile data collection terminals, a complete set of hidden hazard information database with hidden hazard codes, levels, etc. is convenient for safety supervision personnel to quickly retrieve the corresponding detailed hidden hazard information, which improves the efficiency of hidden hazard collection and minimizes the delay in governance. And related personnel will not delay the management of hidden hazards due to the unclear description of hidden hazards. From the perspective of coal mining enterprises, the relevant personnel of the enterprise use the hidden hazard inspection system or other means to analyze the high-frequency hidden hazard information, compile the hazard descriptions, the consequences of the hidden hazards, preventive measures, rectification measures, etc., and add pictures or videos to form a complete one. The hidden danger information is recorded in the common hidden danger information database. From a national perspective, relevant departments should form a set of standard systems for the management of hidden dangers based on the experience and lessons of large-scale coal mining enterprises across the country or other countries in the management of hidden dangers, so that coal mines can quickly inquire and determine governance measures.
3.2 Location of hidden danger sites
Usually with the help of personnel positioning systems to determine the location of hidden dangers. First, the mobile data collection terminal sends a signal to the base station. After the signal is received and processed by the base station, the signal is sent back to the ground through the network to monitor the center, and the location information is returned to the mobile data collection terminal with the help of the personnel positioning system. The author believes that the accuracy of the personnel positioning system lies in the density of the base station layout, and the hidden dangers. RFID technology can identify specific targets and read and write related data through radio signals. RFID tags can be divided into low frequency tags (125 kHz or 134.2 kHz), high frequency tags (13. 56 MHz), ultra high frequency tags (868 to 956 MHz) and microwave tags (2. 45 GHz) according to radio frequency. Due to its non-contact identification characteristics, RFID is very suitable for the harsh environment of coal mines. The underground hazard investigation needs to collect personnel and location information, and adopt UHF RFID tags, which have the characteristics of long identification distance, high reading rate, and strong anti-conflict ability. In view of the cost of base station layout and the mobility of underground mining channels, it is recommended to use low-cost UHF RFID electronic tags. The relevant responsible personnel can use the geographic information system to subdivide each area through the underground mine map and fix it in each corner of the underground. , Scan the electronic tag to determine the hidden danger location through the mobile data collection terminal. This method is simple, practical and more accurate.
Shuo Teng mobile data collection terminal uses pictures, videos, and texts to solve the problems of distorted descriptions of the hidden dangers of coal mining enterprises and delayed information transmission. It improves the original traditional hidden dangers investigation work mode and improves the level of hidden danger management of coal mining enterprises. . At present, the mobile data collection terminal has been applied to the solution of Henan Shenhuo Group’s Xuehu Coal Mine Hidden Hazard Investigation System, and has achieved good application results. While expanding the work and investigating coverage, it has greatly reduced the hidden danger closure process cycle and hidden dangers. The rectification rate has increased by 5%~10%. With the increase in the awareness of hidden dangers of coal mining enterprises and technological advancement, the use of mobile data collection terminals will truly realize the accurate and visual management of hidden danger investigations, and provide guarantees for the safe production of coal mining enterprises.
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