Improvement of hole drilling technology for ore drawing intensification

Abstract

The improvement of hole drilling for increasing the mineral recovery ratio by ore drawing improvement through blasting. The new laws of change in the hole drilling penetration speed depending on the complex of technologi-cal parameters of drilling are obtained. The authors offer a model describing the possibility of hole drilling in the broken massif as well as an optimized design of the string necessary for that. The obtained regularities determine mechanical and energy drilling indexes and which are necessary at the stage of designing when deciding upon practicability of extraction of in-situ left ores while enhan-cing mining technologies of ore drawing.