The Key Technologies On Mine Emergency Rescue System Based On OpenSceneGraph

From the world view of development and use of energy, mineral resources has an important role in reserves,production or consumption.China is one of the largest producers of coal,but it is one of the countries which have the worst safe level.In recent years,a requirements of energy has a significant increase due to the rapid development of economic.So many coal companies expand production scale.Because of the backword safety requipments,many accidents have been caused by an inappropriate measures of mine ventilation.These accidents includes gas explosions,fire,flooding and some man-made accidents which is caused by the delay response to natural accidents.In summary,there are three key technologies need to be studied in the aspect of mine safety:1)Mine ventilation system is very important to the safety of company.It is to safeguard the life of miners.So to study and establishment the ventilation model and optimization methods is meaningful;2)When disaster happens,the commanders how to lead miners to the corresponding regions quickly and accurately in order to protect personnel and property from a second loss;3)How to show the complex tunnel intuitively to the users.The contents of the thesis mainly includes three modules:1)The module of mine tunnel visual designs.System is developed with a tool VS2005 and OpenSceneGraph platform.It is easily for users to add,delete and drag the model of tunnel.It also has the feature of pan,zoo and rotation model of tunnel.Besides,it can show some informations of tunnel just like wind pressure, wind resistance.2)The module of the solution of ventilation network.firstly,the thesis introduced basic theory of mine ventilation which includes air flow equilibrium, pressure equilibrium law, law of conservation of energy and law of resistance and ventilation.Also it improve the algorithm of solving minimum spanning tree and independent circuts and proposed method of oritention circle of the loop.3)The module of escaping routes visualization.It improved Yen algorithm which is used to solve the K shortest loop path problems,and achieve the visualization of escaping routes.It completes the scene of fire and flood using OSG particle system and edits the escape routes.