Where should a blasting cap be positioned when a bore hole is charged?

Positioning the blasting cap central in the primer and pointed toward the charge is essential for effective detonation. This placement ensures that the shock wave produced by the blasting cap is directed towards the explosives in the bore hole, maximizing the efficiency of the blast. Proper orientation enhances the initiation process, reducing the chances of misfires and ensuring a uniform explosion which is critical for safety and the desired outcome of the blasting operation.

When the blasting cap is centered and directed correctly, it allows the energy from the detonation to fully activate the main charge, leading to optimal fragmentation and control of the blast. This technique minimizes hazards associated with improper initiation placement, promoting a safe working environment.

Other positioning options, such as placing the cap randomly within the charge or at the bottom of the hole, do not provide the necessary focus and energy direction required for reliable detonation. Similarly, positioning the cap on the surface above the hole would fail to effectively transfer the detonation impact into the charge, significantly compromising the effectiveness of the blast.