Mine accidents always occurred at the high risk coal mining industry. There is 3 accidents occurred in the recent month. The last news is that 5 people died by harmful gas choking in Fodiangou coal mine of Pingyao coal company on July 7^th. At the back of every accident, hundreds and thousands families should bear the infinity pain. How to avoid mine accident, how to maximize reducing the number of casualties when mine accident happened? It is very important that establish the scientific and compulsive safety management measure.

In order to solve the rescue problem, accurate locate underground personnel, and reduce the blind of mine accident rescue, the State Administration of work safety and the National Coal Mine Safety Supervision Bureau issued the notification about building 6 comprehensive coal mine safety systems to avoid risk, the notification require that underground personnel system should be installed in all the coal mine company before 2011. The extension of mine safety production license, even the producing would be influenced if the coal mine company do not follow the notification.  

In the past several years, only central enterprises and state-owned key coal mines have installed the location system, it is just small number of thousands coal mines, many middle and small coal mine company still not install this system. Also, common underground location system use the radio frequency positioning method, actual location effect area of this method is only between 200 to 300 meters. And, The practical use of some key technical indicators of the old personnel management system is not satisfactory. The missing, misstatement, lost, easily influenced by environment, not very stable and so many defects exist in this system, it should be instead by developed new product.

The miner’s lamp which has the location function

The Great Aim optical communication developing by the situation, creatively integrate the visible information technology into common LED lighting, apply the digital optical communication information technology into accurate underground personnel positioning, to instead of the radio frequency positioning system. The principle of new system is just like the replacement from analog cell phone to digital cell phone, it is also the first in China.

The researching of the underground personnel positional management system get substantial progress now, it enter the industrial tunnel stage. It means that the underground personnel management system would get the "Coal" certification after a few months, so the market door could be opened.

As known, this system composed by information tunnel lamp, information miner’s lamp, data substation, wireless substation, optical ring network and data management information system. The optical communication technology interact with information miner’s lighting through the information data superposition of LED information tunnel visible lighting, and collect the actual time data from wireless substation through the wireless device which inside the miner’s lamp, then organizing the data in the substation node, to pass the data to the information analysis management system to monitor the situation of underground personnel via the underground optical ring network.

Because the system use information tunnel lamps which are installed inside the coal mine as the coordinate, so the accuracy of positioning could be huge increased, it could be 10 meters. The system have many incomparable advantages at reliability, environmental adaptability, real-time performance, accuracy of underground personnel positioning and large capacity data storage parts. The capacity of the card number is 65535, and the data can be stored for more than two years.

As known, this system can help the common LED lamp upgrade to information lamp, huge enhancing the technical content of traditional lamp in terms of keep the cost. In other hand, for customer uses, it integrates the underground lighting system with underground personnel management system, reduce the cost and difficulty to set the underground personnel management system solely, the total cost could be reduced by more than 25%.   

The products of visible light communication underground personnel positioning management system have many obvious advantages than others in the accuracy of positioning, anti-interference ability, reliability and cost control parts. According to forecast, there is several billions RMB demand in the domestic potential market, and count in the demand of other mines and oversea market, the underground personnel positioning system which integrated with mine’s lighting products has a sweet future. 

Mine accident is a evil! Coal mine safeguarding system is a large and comprehensive system, optical communication underground personnel positioning system is the nervus centralis of the whole safeguarding system, it can accurately reflects the move track, access time of every underground personnel, and can forecasts the potential dangers in actual time, it is very convenient for technical staffs to manage and design the rescue plan when the accident happened. Let’s struggling together for the never disappeared world!