METHOD FOR PENETRATION OF MINE WORKING

摘要

Method for penetration of mine working includes drilling of central well, and round it - four peripheral blast holes in head of design contour of the working, with reaming central well till formation of compensation cavity in ellipsoid form, with charging blast holes with explosive substances (ES), switching explosion network and initiation in one step with retardation in whole height of working to compensation cavity. At that in two peripheral blast holes drilled in zone of compression stresses one forms charges with cumulative effect, and in two blast holes drilled in zone of stretching tensions - charges with continuous structure. Technical result of the invention is in increase of effectiveness of explosion of well charges of ES and quality of destruction of strong viscous rocks.