Principle of Control Blasting 1: Presplitting blast Techniques Theory
Open pit mining is one of the surface mining method use in exploiting less overburden material. Open pit method is one of the special mining method use to extract competent ore with flat shape. This method is unique with it's step wise approach use to mine the deposit in benches. The safety requirements for the success of this type of mine is not restricted to Open pit blasting at first may require box cut approach to create additional free face at the horizontal direction for successful throw. Mostly if the blasting is carried out at the last bench floor or as the first blasting for face opening. In such case where: 1. Environmental Impact has to be controlled, 2. Safety of workers, equipment and nearby things have to be presented, 3. Blast economy in place of cost of blasting material effect on overall blasting cost have to be minimize, 4. Success optimum fragmentation size with less than 5% oversize and undersize, and 5. Dilution, overbreak and back break needs to b...