FIELD: mining. SUBSTANCE: vertical slots are cut through entire thickness of the bed while forming blocks in condition of unstable equilibrium. The blocks are cut-off and caved in, and then the rock is sprayed from above. Gravity-flowing water jet is directed to cut-off the blocks and cave in the rocks from water reservoir over the formation. EFFECT: underwater formations development. 4 dwg
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Authors
Dates
1995-02-27—Published
1990-07-02—Filed