Design And Application Of Wireless Monitoring And Warning System Of Dafeng Mine Fire-area

Coalfield fire is widely distributed around the world, from China, India, America, Russia, Central Asia and other countries and regions. Due to the special geographical location and climatic conditions, the coalfield spontaneous combustion in China is among the most serious countries in the world. It is estimated that the economic losses of China’s coalfield fire is at least RMB200billion per year. The existing temperature monitoring technique of the coalfield fire is mainly by means of artificial monitoring. As temperature monitoring possesses the shortcomings of point-contact, small forecast range, heavy workload of installation and maintenance, failing to provide real-time monitoring and early warning, especially the easy damage of probe and lead, it is restricted in practical applications due to technical and economic constraints, which leads to the infeasibility of widely used for fire detection, hence it can not be well positioned to meet the requirements of coal mine production safety. The Characters of spontaneously combusted coalfield, such as invisibility, scattered ignition points, remote distance and other characteristics, make coalfield fire prevention, monitoring and control extremely difficult. The monitoring method of the Wireless ad hoc network technology combined with the temperature sensor is a new development trend in recent years. It has changed the topology of the traditional temperature sensor system to meet the additional applications of the temperature measurement.Dafeng mine mining Taixi coal is very rare in China, with the quality anthracite of "three low-six high" characteristics. For Dafeng mine coal spontaneous combustion’s time longer, the fire-aera reached thousands km2, national resources suffered great loss. Meanwhile, the fire-aera forming high temperature brings about serious impact to coal mining and safety in production. In order to mine the coal resources of the high temperature as soon as possible, Dafeng mine cooperated with Xi’an University of Science and Technology, presented the study of Wireless Monitoring and Warning System of Dafeng Mine Fire-area, achieved good results in field application.According to the actual demands of the Dafeng Mine Fire-area temperature monitoring, the system integrates ZigBee technology, embedded computer control technology, sensor technology, data acquisition technology and database technology in one. The present gived a framework of the overall system composition, the function and required performance, the working principle and method of the system, designed the hardware and software of the wireless temperature measurement node and the main control node, and host computer monitoring software, described the application environment of the monitoring system and the layout method in engineering, discussed the monitoring mechanism of the system, and analyzed effect of the system in practical industrial engineering.