Development of a system of plane radial cracks during explosion of linear blasthole and borehole charges

Resumo

Numerical algorithms have been developed to determine the shape and dimensions of radial cracks formed during confined explosions of linear charges in a monolithic rock massif at a great depth and near its surface. The influence of the charge length on the dimensions of radial cracks in a confined explosion has been studied. The burial depth of a borehole or blast charge for which the area of radial cracks is maximal is determined.