METHOD FOR SHAFT SINKING Russian patent published in 1996 - IPC

Abstract RU 2068097 C1

FIELD: construction and mining. SUBSTANCE: method for shaft sinking includes drilling of advance working and blast holes and widening of advance working from the bottom upward by blasting charges in them. Blast holes are drilled from the advance working by arranging them over screw line with inclination to vertical axis at angle of 45-90 dwg. Blast holes are fired alternately with delay by sectors. EFFECT: higher efficiency. 3 dwg

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RU 2 068 097 C1

Authors

Zaripov M.Kh.

Dates

1996-10-20—Published

1990-10-02—Filed