## How do you calculate the amount of material blasting in a quarry?

The total volume of material produced by blasting was calculated by dividing the total amount of material obtained by the unit weight of rock for each blast test (Table 3).

### How is blasting powder factor calculated?

Powder factor can be expressed as a quantity of rock broken by a unit weight of explosives. Or, alternatively, it can be the amount of explosives required to break a unit measure of rock. Powder Factor = Tons of rock (or cubic yards) per pounds of explosive.

#### What type of explosives are used for mining?

Ammonium nitrate fuel oil (ANFO) is made of about 94\% ammonium nitrate and 6\% fuel oil. ANFO is widely used as an explosive in mining, quarrying, and tunneling construction or wherever dry conditions exist.

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What muffled blasting?

Muffle blasting is used in opencast mining to prevent fly rock near the populated and roadways area.

How much explosive power does one stick of dynamite have?

A stick of dynamite thus produced contains roughly 1 MJ (megajoule) of energy. Other sizes also exist, rated by either portion (Quarter-Stick or Half-Stick) or by weight. Dynamite is usually rated by “weight strength” (the amount of nitroglycerin it contains), usually from 20\% to 60\%.

## What explosive is used for rock blasting?

DYNAMITE – A high explosives used for blasting, consisting essentially of a mixture of, but not limited to, nitroglycerin, nitrocellulose, ammonium nitrate, and carbonaceous materials.

### How do you calculate the powder factor of an explosive?

Powder Factor = Tons of rock (or cubic yards) per pounds of explosive. Normal range = 4 to 7 Shallow holes = 1 to 2 External loads = .3 Tons of Rock = Powder Factor lbs of Explosives The higher the powder factor, the lighter the load. Lower powder factor means more explosives. From Powder Factor of 1 lb./c.y.

#### What is the difference between high explosives and low explosives?

“High explosives” detonate, whereas “low explosives” deflagrate or burn. A high-explosives detonation provides both shock, which fractures (or breaks) the rock, and force (in the form of gas products), which heaves and displaces the fractured rock.