Abstract
The design scheme is developed, and simulation of radial cracks growth under blasting of closely spaced borehole charges is carried out. The case studies of confined explosion of two charges located in neighboring boreholes are considered. Blasting of decoupled charges in neighboring boreholes is investigated. The free surface effect on a shape and size of radial cracks under explosion of two closely spaced boreholes rising to the surface is simulated. The blast pattern to gain the maximum size of the destruction zone is determined.
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