Research On Human Evacuation Based On The Shortest Time In Underground Fire

Our country's economic construction has been greatly promoted by the prosperity of modern industry,at the same time,safety production has been more and more concerned by the masses,especially in mine enterprises,safety production has become an important factor which affects the development of an enterprises.Situations have been found by studying the typical accidents in underground mines:When underground fire accidents occurred,death mainly occurred in evacuation or the process of escape blocking.This is mainly caused by the hazards of the event itself,but there are also part of the losses were due to wrong evacuation strategies.When underground accidents occurred,people often chose a wrong path which caused heavy casualties.In order to guide people evacuated safely,a reliable evacuation route became critical.First of all,research has been analyzed about human evacuation in underground fire,the significance of emergency rescue system of underground mine was illustrated.The definition of the best evacuation route was expounded,the best evacuation route means the best path between the locations where people started and the safety place.A variety of classic solution of the evacuation route was introduced in detail(mainly includes Dijkstra Method?A*Method?Floyd-Warshall Method?Ant Colony Algorithm and Equivalent Length Method).Based on the study of the classic algorithms,the limitations of practical application were analyzed.Secondly,on the basis of analyzing the movement characteristics of fire smoke in mines,study about human evacuation based on the shortest time has been analyzed.Compared with the classic algorithms,the basic theory of mathematical model?mathematical description?parameters analysis and algorithm flow was put forward based on the shortest time algorithm.The human evacuation time was resolved into different evacuation time during different tunnels,the height of tunnels,flow density,available width,retention effect,the corner effect were all considered during the calculation,and the correction factor was used to balance the calculation,and the final model of the best evacuation time was established asT=t~?_p?t~?m+t~?_x()+t~?_p+t~?_j+t~?_k+t~?_l+?t_?.Thirdly,research about Python-based automatic calculation of shortest time algorithm has been analyzed.Based on the interpretative and scalability characteristics,simulation about Python-based automatic calculation of shortest time algorithm has been presented and designed,the basic procedure of the best evacuation path calculated by the simulation software was explained,the parts of input and output of parameter information was described,and the core code was given.Finally,combined with Da Hongshan iron mine,simulation of human evacuation based on the shortest time algorithm was calculated.The example showed that,the model of the best evacuation path in underground fire,which was based on the shortest time,has the ability to solve the best evacuation path rapidly by using the simulation platform designed by Python.This model was appropriate for underground mine,which provides scientific basis for human evacuation.