Emergency Escaping Route Research Of Colliery Based On Wi-Fi Location

Due to the particularity and complexity of coal mining, the coal mine safety accidents have occurred. After the safety accident occurred, by accurate navigation and position technology, it can effectively short the avoiding time for underground personnel and rescue time for relief personnel. With the informative and intellectualized development of human society and in order to improve the efficiency and security of the coal mine to avoid disaster, it has important practical significance and application prospect to study the navigation technology of downhole emergency avoidance.Based on the coal mine application environment and the characteristics of Wi-Fi wireless communication technology, Wi-Fi was determined as the communication technology of locating in colliery. In the process of locating disaster personnel in colliery, the fingerprint algorithm based on signal strength value was implemented. Since Android system has the characteristics of open source, high security and so on, the colliery emergency disaster avoidance route optimization based on Android is studied.In this thesis, the traffic state of tunnel after the accident was analyzed and researched. Firstly, the developing trend of disaster was forecasted and analyzed. In the prediction of disaster in colliery, the tunnels’ traffic ability was judged. Based on the Wi-Fi technology, the affected personnel’s location was determined. According to the location of disaster site and by judging the exit after disaster, the emergency escaping route was determined. Based on analyzing the relationship between optimal emergency escaping route and the effective factors such as tunnel slope, tunnel height, tunnel width and so on, and on the basis of tunnels’ equivalent length, the optimization model of emergency escaping route was put forward.In this thesis, based on the optimal goal of equivalent length, we put forward the emergency route search based on shortest path and TOP-N algorithm. For the emergency route search based on the traditional Dijkstra algorithm, it searches out a best route from the affected personnel’ location to safe exit, which combined with the characteristics of tunnel after the accident. The emergency route search based on the TOP-N algorithm, the roadway network diagram will be stored in a matrix. According to the proposed algorithm, all routes can be calculated from the source point to the safe exit. The two methods can calculate the optimal path from the accident to safety ground in a short time, and it is suitable for the application of the scene of colliery accident.