Search The Ventilation Network One-way Loop Position

If the two endpoints of route are the same node, the route is a circuit, if the two endpoints of a path are the same node,the path is a unidirectional circuit.. The unidirectional circuit in the ventilation networks means the cycle of the wind in the ventilation system. When the cycle of the wind exists in the ventilation system, it will reduce the efficiency of the ventilation system, affect the reliability and stability of the mine, deteriorate the underground production environment increase the insecurity of all kinds underground the mine.The study of unidirectional circuit has a far-reaching significance for the safety of the mine.This paper analyzed the unidirectional circuit problem of the ventilation network form the actual mine ventilation system.This paper present the relationship between ventilation network topology in the realization of the calculation method; analyzed the way to draw the network which is easy to identification by computer. This way of drawing network is different form the traditional network. This paper study the way to take the ventilation network data into Matlab network, the way to get the incidence matrix and the loop matrix This paper also introduce the apply of depth-first search method in acquire the tree branch of the network.In this paper, we introduce the method to determine the location of unidirectional circuit. Fist way is use the circuit matrix to find the wind circulation on the network, here also discuss the combination of the basic circuit and into a new circuit. Secondly, use the depth-first search method to determine the unidirectional circuit in the roadways where there are fans.In this paper, Matlab programming was used to achieve the Incidence matrix and the Loop matrix, we also programmed the depth-first search method to get the recirculation airflow in the roadways where there are fans.