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

The maximum charge of permissible explosive allowed for a hole that is 6 feet or more in depth is 3 pounds. This regulation is in place to ensure safety and control over explosive use in deep boreholes, as using excessive amounts can lead to dangerous outcomes, including misfires or excessive fragmentation, which can pose risks to workers and the surrounding environment.

In the context of quarrying and construction operations where deep holes are common, understanding these limits is crucial for maintaining safe practices. The specific limit of 3 pounds is established based on research and practical experience that balances effective blasting with safety protocols, ensuring that vibrations and fly rock are minimized while still achieving the desired results.