WELL CHARGE SPREAD METHOD

摘要

FIELD: mining. ^ SUBSTANCE: well charge spread method involves suspension at the specified depth of the borehole gate made in the form of cone with biconical groove in the middle part, and its wedging up by filling of several portions of crushed stone to biconical groove. At that, borehole gate can be made from rubber, wood or plastic mass. ^ EFFECT: simpler formation of air gap in the explosive charge and higher reliability of the charge spread. ^ 2 dwg