## What is empirical formula for caffeine?

Empirical formula of Caffeine C8H10N4O2 is (C2H5N2O).

7.808%

153.82 g/mol

## What is permitted explosive?

A permitted explosive is one that has been approved for use in coal mines where there is any possible risk of igniting combustible gases or coal dust. These tests are carried out at the Safety in Mines Research Establishment’s Testing Station at Buxton.

## Which is used as explosive?

Examples of primary high explosives are:

• Acetone peroxide.
• Alkali metal ozonides.
• Ammonium permanganate.
• Ammonium chlorate.
• Azidotetrazolates.
• Azoclathrates.
• Benzoyl peroxide.
• Benzvalene.

## What is drilling pattern?

Pattern drilling is a technique that is used when a sequence of holes must be drilled within a very tight locational tolerance or array, often involving a variety of sizes, depths and dimensional orientations.

## What is detonator factor?

A detonator, frequently a blasting cap, is a device used to trigger an explosive device. A blasting cap is a small sensitive primary explosive device generally used to detonate a larger, more powerful and less sensitive secondary explosive such as TNT, dynamite, or plastic explosive.

## How is blasting powder factor calculated?

Powder factor can be expressed as a quantity of rock broken by a unit weight of explosives. Since rock is usually measured in pounds, there are several possible combinations that can express the powder factor. Powder Factor = Tons of rock (or cubic yards) per pounds of explosive.

## How do you calculate blasting volume?

The volume of material to be blasted is calculated by the rock-volume formula, as follows: Volume = burden dimension x spacing dimension x (hole depth – subdrill length)/27, where • hole depth – subdrill length = bench height∗ and • burden dimension, spacing dimension, and bench height all are measured in feet.

## What is drilling and blasting method?

Drill and blast method is mostly used method for the excavation throughout the world. The method can be used in all types of rocks and the initial cost is lower than the mechanical method like TBM. This tunneling method involves the use of explosives. Drilling blast holes and loading them with explosives.

## What is the process of blasting?

Blasting, process of reducing a solid body, such as rock, to fragments by using an explosive. Conventional blasting operations include (1) drilling holes, (2) placing a charge and detonator in each hole, (3) detonating the charge, and (4) clearing away the broken material. rock blasting.

## What is charge factor in blasting?

blast design, blasting, surface mining. 1 INTRODUCTION. The specific charge (powder factor) is a measure of the mass of an explosive required. to break a unit volume or a unit mass of the rock.

## How do you calculate burden spacing?

Spacing = 15 x Hole diameter (hard rock) 20 x Hole diameter (soft rock) Burden = 1.25 x Spacing Fire as many holes as possible on one delay.

## What are the factors affecting blasting?

The major factors affecting the blast-casting results include: bench height, burden, dip angle of blast holes, powder factor, delay time interval, presplitting blasting effect, blasting patterns, and so on.

## How do you calculate maximum charge per delay?

Bureau of Indian Standard [9] v = K [(Qmax/D2/3])B CMRI Predictor [10] v = n + K (D/√Qmax)-1 Where, v = Peak particles velocity (PPV), mm/s, Qmax = Maximum charge per delay, kg, D = Distance between blast face to vibration monitoring point, m, and K, B, and n = Site constants.