METHOD FOR FORMATION OF CAVING SLOT IN STOPE ROOF Russian patent published in 1995 - IPC

Abstract RU 2039263 C1

FIELD: mining industry. SUBSTANCE: method for formation of caving slot in stope roof includes sinking of hole 1 in coal seam on the contact with roof in direction from belt heading to airway up to their connection. Installed in hole 1 is stone saw 2 of immersion type which is oriented and fixed in hole. Cutting tool on raising boom 11 cuts into roof rocks to a preset depth and in this position it is pulled along hole at speed synchronized with formation of saw cut. Thus, caving slot is formed by cutting the undercut rock cantilever which is caved over this slot when face support passes it. EFFECT: higher efficiency. 2 dwg

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RU 2 039 263 C1

Authors

Bykov N.A.

Bykov A.N.

Dates

1995-07-09Published

1992-06-15Filed