GIANT MINER

Stemming in blasting is very important and affect not only the efficiency of the blasting but also the impact of the blasting on the environment. By simple definition, stemming is a confinement process done by the use of innert materials to confine explosive charge within the drill hole during charging. The define function of stemming is to: 1. Ensure the explosive charge is confine within the hole socket so as to avoid poor distribution of explosive release shock energy. 2. Prevent the escape of shock wave into the environment and causing airblast and other environmental impact. Stemming can be top confine or inter-column charge confined. In case of decking charge pattern, each explosive charge column is separated by innert material to reduce the charge weight and also to ensure effective distribution of shock energy along the hole column. In the case of decking, stemming is use to confine and to separate upper charge column from the lower charge column. Stemming materials...