Effect of the method used to detonate the borehole charges on the breakdown characteristics

ConclusionsThe change in the method of detonation is an effective means of controlling the energy of the explosion.By choosing an appropriate method of detonating it is possible not only to concentrate the explosive energy in a specified direction but also to increase the total effect of the explosion in various media.Using the bilateral cord detonation it is possible to achieve a 10–40% increase in the work-effectiveness of the charge depending on the type of rock by comparison with detonation from the end; effectiveness can also be increased 17–80% by comparison with detonation along the charge. This will enable the parameters of drilling and explosive work to be changed and make it possible to have a 30% reduction in costs as has been shown in preliminary analysis.