METHOD FOR ROOF CONTROL IN FACE END PART Russian patent published in 1994 - IPC

Abstract RU 2018664 C1

FIELD: mining. SUBSTANCE: roof control is effected by withdrawal of support of development working under protection of pneumatic cribs which are advanced by means of hydraulic jacks in staggered order on alternate stoping cycle. EFFECT: higher efficiency. 2 dwg

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RU 2 018 664 C1

Authors

Zabrodskij V.A.

Razumnjak N.L.

Gutikov V.F.

Dates

1994-08-30—Published

1991-06-28—Filed