METHOD FOR ACTION ON COAL SEAM Russian patent published in 1995 - IPC

Abstract RU 2041347 C1

FIELD: mining. SUBSTANCE: gap of hydraulic fracturing is wedened by successive washing with water and blowing with air. Novelty consists in regulated flow rate of blown air exceeding that of washing liquid by 5-15 times. Washing and blowing are performed repeatedly. EFFECT: higher efficiency. 2 cl

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RU 2 041 347 C1

Authors

Krejnin Efim Vul'Fovich

Dates

1995-08-09Published

1991-12-05Filed