METHOD FOR PROFILED BREAKING OF ROCKS Russian patent published in 1994 - IPC

Abstract RU 2023878 C1

FIELD: mining industry. SUBSTANCE: method involves bullet perforation of profiling holes. The perforation zones in adjacent holes are offset from one another along the length of holes. Perforation is carried out in the plane parallel to design outline of mine working. Light explosive charges are placed in profiling holes on their perforation. EFFECT: blasting of charges forms a contour of the working which is close to the design outline. 4 cl, 3 dwg

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RU 2 023 878 C1

Authors

Shtele V.I.

Dates

1994-11-30—Published

1991-04-05—Filed