True or False: drill holes should be large enough to freely admit the insertion of explosive cartridges.

True or False: drill holes should be large enough to freely admit the insertion of explosive cartridges.

• A. True
• B. False
• C. Not specified
• D. Only with permit

Answer: (A)

The main idea is that boreholes must be sized to accept the explosive charges comfortably so they can be loaded safely and seated correctly. When holes are large enough to freely admit the cartridges, loaders can place the charges without forcing, bending, or damaging them. This reduces the risk of cartridge damage, ensures proper seating against the bottom of the hole, and allows proper confinement with stemming. Proper insertion supports safe handling and consistent blasting results, whereas holes that are too small would make loading difficult and could lead to damaged charges or misfires.

The main idea is that boreholes must be sized to accept the explosive charges comfortably so they can be loaded safely and seated correctly. When holes are large enough to freely admit the cartridges, loaders can place the charges without forcing, bending, or damaging them. This reduces the risk of cartridge damage, ensures proper seating against the bottom of the hole, and allows proper confinement with stemming. Proper insertion supports safe handling and consistent blasting results, whereas holes that are too small would make loading difficult and could lead to damaged charges or misfires.