METHOD FOR SEALING OF HOLE MOUTH AND ITS DISMANTLING Russian patent published in 1994 - IPC

Abstract RU 2012774 C1

FIELD: coal mines. SUBSTANCE: method consists in mounting of liquid nitrogen heat exchanger in mounting chamber 1 specially equipped in base of hole mouth in filled ground. Heat exchanger is communicated with hole clearance of pipeline 4 and liquid nitrogen reservoir. Preliminarily wetted filled groups and wall rocks are frozen by supplying liquid nitrogen to heat exchanger 6. During dismantling, superheated steam is supplied to heat exchanger to warm up filled ground and wall rocks to facilitate dismantling of equipment. EFFECT: higher efficiency. 2 cl, 1 dwg

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RU 2 012 774 C1

Authors

Chuprikov A.E.

Dates

1994-05-15—Published

1991-06-18—Filed