FIELD: containing explosion of gas and dust in mine working. SUBSTANCE: water gate has sealed tank with water in elastic shell secured to the vault of mine working through flexible network, central and lateral sieves placed under the tank, gate drive in the form of a blade positioned in case. The blade is secured through hinge-lever mechanism and may be moved in horizontal and vertical directions, it has stops against horizontal travel. Terminal levers are extended from the case. EFFECT: high reliability. 3 cl, 3 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| WATER BARRIER | 1991 |
|
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