FIELD: mining.
SUBSTANCE: long blind drift ventilation method involves drilling of the main and additional wells in a pillar between adjacent and blind drifts; development of the cavity connecting the main and additional wells; air supply via the main well from fan or other draft source from adjacent drift to blind one; air ejection via additional wells from adjacent drift to blind drift. For more qualitative mixture of active (inducing) and passive (induced) jets the created cavity has bigger length and is made in the form of cone - diffuser.
EFFECT: increasing the jet head, flow continuity and its hydrodynamic stability, increasing system ejection coefficient.
2 dwg
| Title | Year | Author | Number |
|---|---|---|---|
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|
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|
RU2027013C1 |
