FIELD: construction; applicable protective device at the entrances of underground structures with harmful and hazardous production processes, for instance, underground nuclear power stations. SUBSTANCE: earth-fill dam is installed in mine working and present a loose body confined from both sides by walls, and loose body is filled by hydraulic excavation with possibility of cementation in course of service, for instance, from sand. EFFECT: reduced labor input of erection and dismantling, easier operation, decreased permeability of dam. 1 dwg
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RU2098547C1 |
