What is the minimum charge of permissible explosive allowed for a hole 6' or more in depth?

The minimum charge of permissible explosive allowed for a hole that is 6 feet or more in depth is 1.5 pounds. This standard is established to ensure that the explosive charge is adequate for effective detonation while remaining within safety regulations. The purpose of specifying a minimum charge is to promote effective blasting operations, ensuring that there is sufficient explosive material to achieve the desired results without causing excessive risk of misfire or incomplete detonation.

When considering the depth of the hole, which is a critical factor in determining the explosive charge, a depth of 6 feet warrants a charge that balances effectiveness and safety. A charge of 1.5 pounds is designed to optimize the blast while minimizing potential hazards. Explosives need to be powerful enough to fracture the material effectively, but not so powerful that they pose a danger to the operators or the surrounding environment. Thus, the establishment of this charge as a minimum is a guideline aligned with best practices in explosive handling and usage.