The detonating equipment required for this detonation method includes a detonator, a detonating cord, and a squib.
Commonly used detonating cord detonation networks are:
First, the clusters are connected in parallel, and the ends of the branching blasting cables from all the blastholes are bundled into one bundle or several bundles, and then connected to a dominant blasting cord. This detonation network can cause the blastholes to detonate almost simultaneously, but the detonating cord is very expensive. This blasting method is generally used when the number of blastholes is small and concentrated.
Second, the sections are connected in parallel, and a dominant blasting cable is laid in the blasthole or the medicine outside, and the blasting cords which are led out from the blastholes or the medicine chamber are respectively connected with the main blasting cords. If you want to achieve millisecond blasting, you can install a squib in the network. This kind of network detonating cord has less consumption and adaptability, so it is widely used. As shown in Figure 1.
Fig.1 Schematic diagram of the detonating network of the detonating cable
(α) ordinary segmented parallel; (b) differential differential parallel
1-detonator; 2-dominant blasting cord; 3-branch blasting cord; 4-charged blasthole; 5-burst tube; 6-blast hole
Third, the two-way segmental parallel connection, the branch blasting cable from each blasthole or drug room of this network can simultaneously accept the explosive energy from two directions, and the detonation is very reliable. This method uses T-type or triangular connection, and the detonating cord consumes a large amount. The connection diagram is shown in Figure 2.
Figure 2 Schematic diagram of two-way segmented parallel network of detonating cord
1-detonator; 2-dominant explosive cord; 3-branch-exploding cord; 4-detonator; 5-burst
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