Nonel network with bunchy connection in first stage, double main and closed loops
Huang Feng-lei · Journal of Yangtze River Scientific Research Institute · 2002
In order to develop initiating technique with an initiation network used in urbani complex environ-ment, an optimum network design and reliability research on blasting were perfOrmed. The connection method ofinitiation network includes double main in the first stage, bunchy connection and closed loops with four-vent ofsmall reseaus. This connection system makes the whole blasting region form an across connection-mixing networkin which doub1e main, multiple small-net with closed loops are connected among nonel-tube detonators, and elec-tro-detonators are initiated by multiple spots. It can greatly raise connecting speed of a network and the reliablili-ty of initiation. By means of an illustration, some system diagrams showing different numbers of initiation pointsare given;and on the basis of reliability theory and the largest route principle, the reliability of every initiationsystem is analysed and discussed. The study results show that the initiation system is not only accurate, reliableand safe in initiation and unlimitative in initiation charges and number of detonators, but also its operation sim-ple,detection convenient and construction period short; thus every thousand nonels can be initiated by two orthree initiating spots.