Small introduction about explosives

1. Explosives

2. Characteristics
• It is a chemical compound or mixture ignited by heat, shock, impact,
friction, or a combination of these conditions;
(2) Upon ignition, it decomposes rapidly in a detonation;
(3) There is a rapid release of heat and large quantities of high-pressure
gases that expand rapidly with sufficient force to overcome confining
forces; and
(4) The energy released by the detonation of explosives produces four
basic effects; (a) rock fragmentation; (b) rock displacement; (c) ground
vibration; and (d) air blast.

3. Theory
• detonation of the explosives charge causes a high-velocity shock wave
and a tremendous release of gas.
• The shock wave cracks and crushes the rock near the explosives and
creates thousands of cracks in the rock.
• These cracks are then filled with the expanding gases. The gases
continue to fill and expand the cracks until the gas pressure is too
weak to expand the cracks any further, or are vented from the rock.

4. ingredients in explosives
• Explosive bases
• Combustibles
• Oxygen carriers