What should be the necessary document for Bill?, how do you justify that fiber shotcrete is okay or not ? What should be safest distance for Tunnel face blast?, what is powder factor?

Question

Accepted Answer

The necessary document for Bill is a detailed invoice. Fiber shotcrete can be justified through testing and analysis. The safest distance for Tunnel face blast depends on various factors. Powder factor is a measure of explosive efficiency.

The necessary document for Bill is a detailed invoice that includes all the relevant information such as the scope of work, quantities, rates, and any additional charges.
To justify the use of fiber shotcrete, it is important to conduct tests and analysis to determine its strength, durability, and compatibility with the tunnel environment.
The safest distance for Tunnel face blast depends on factors like the type and amount of explosives used, geology of the area, and proximity to structures or sensitive areas.
Powder factor is a measure of explosive efficiency and is calculated by dividing the weight of explosives used by the volume of rock being blasted. It helps in optimizing the blasting process and minimizing costs.