ANALYSIS OF THE EFFECTIVENESS OF THE USE OF EMULSION EXPLOSIVES IN BLASTING OPERATIONS

Progress in the explosive destruction of rock massifs is associated with the evolution of explosives in the direction of the development of compositions without explosive components manufactured directly at mining enterprises, equipment and technology for charging wells.

Emulsion explosives are more effective compared to industrial explosives, which is due to a higher charging density and, as a result, higher values of the volumetric concentration of explosion energy and the detonation rate of borehole charges. As a result, EVs are characterized not only by increased pressure at the front of stress waves, acceptable for strong rocks, but due to the presence of a liquid phase (emulsion) in the composition, they maintain it for a longer period of time, which increases the crushing efficiency at a distance from the charge.

Experimental studies have proved that when using EVV in combination with ANFO, the efficiency of drilling and blasting operations in conditions with high ledges increases by increasing the efficiency of the combined charge relatively homogeneous by 15%, the displacement of the ore boundary and the host rocks decreases by 1.5...2.0 times, the quality of crushing rock mass improves while reducing the cost of explosives by 0.9%; with the transition of blasting operations to the use of EVV in combination with NSI, the quality of rock crushing improves with a decrease in the average size of the exploded piece in the collapse by 15.8% and the cost of explosives by 0.8%.