FIELD: mining, particularly breakage face ventilation during highly-gassing coal mining.
SUBSTANCE: device comprises flexible elastic shell with valves secured beyond powered roof support from goaf space side along coal bed cutting line. The shell has perforated orifices arranged along horizontal and vertical lines and directed towards goaf. The shell is connected with fan installed in fresh air stream through air blowing pipe. Filled shell has diameter d determined as d=1.2m, where m is coal bed thickness.
EFFECT: decreased methane inflow, increased operational safety and reduced coal cost.
7 cl, 2 dwg
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