Blast Engineering
- Blasting is the process of breaking of bulk rock masses into loose forms, using explosive compounds. Here, the primary role is played by the explosives. The explosives are the substances or devices used in blasting. The explosives are used to produce a volume of rapidly expanding gas that exerts sudden pressure on its surroundings and break the mass into pieces.
•Fragmentation of rock/ore is a dynamic process, not a static one
•Rock/ore appears to be much stronger in the dynamic case, tha
- •Two main types of deformation that can be imposed on an elastic body are compression and shear. Pure compression alters the volume of the body without alteration of its shape. Pure shear results in a change of shape only, with no change in volume. These types of deformation waves can be transmitted by traveling waves within the interior of a medium. Sound waves are an example of the former type and are characterized by compressing and expanding the medium by particle vibration in the direction
- When the charge diameter of an explosive decreases to a certain value, the explosive will no longer detonate. We call such a diameter the critical diameter of the explosive. The critical diameter is influenced by many factors, such as confinement, initial density, VOD, temperature, reaction zone thickness, void spacing, etc. Critical diameters vary very much, even for the same type of explosive.
Explosion is a general term for an accelerated release of energy generating extreme temperatures, re