The powder factor is the ratio of coal or ore produced in tonnes to the amount of explosive used in kilograms. The detonator factor is the ratio of coal or ore produced in tonnes to the number of detonators used. These factors depend on factors like coal hardness, gallery dimensions, coal cleavage, explosive type, and drilling and blasting effectiveness. Higher powder and detonator factors indicate more efficient drilling and blasting operations.

1. POWDER FACTOR
&DETONATOR FACTOR

2. POWDER
FACTOR
 POWDER FACTOR:- It is a ratio of coal Or ore produced
in tonne to explosive required in kg.
 Tonnes of coal blasted per kg of explosive is known as
powder factor.
 POWDER FACTOR:- COAL PRODUCED( IN TONNE) /
EXPLOSIVE REQUIRED (IN KG)
 Powder factor-
solid blasting- 2-2.5 te/kg
Depillaring- 4.5-5 te/kg
Cut blasting- 5-8 te/kg
In opencast mines – coal – 7-10 te/kg, o/b 1.8-2.5 m3/kg

3. DETONATOR
FACTOR
DETONATOR FACTOR:- It is a ratio of coal Or ore
produced in tonne to no. Of detonator used.
 Tonnes of coal blasted per Detonator is known as
powder factor.
 DETONATOR FACTOR:- COAL PRODUCED( IN
TONNE) / NO. OF DETONATOR.
 Detonator factor-
solid blasting- 1.1-1.3 tonne/detonator
Depillaring- 1.4-1.5 tonne/detonator
Cut blasting- 1.8-2tonne/detonator

4. IMPORTANCE OF
POWDER FACTOR
&DETONATOR
FACTOR
 These factors depends on hardness of coal, dimensions
of gallery, cleavage in coal, type of explosive etc., and
more importantly on effectiveness of drilling and
blasting.
 These factors are indicative of efficiency of drilling and
blasting operation.