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此文介绍了在煤层群开采中。上层煤已采区及围岩瓦斯涌向下层回采工作面造成瓦斯超限时所采取的通风措施——增阻升压法,即在工作面回风道设置风障,使工作面机尾落山处的通风压力高于已采区压力。从而使瓦斯流向采空区。
This article describes the mining in the coal seam group. The upper coal mining area and the surrounding rock gas fray to the lower mining face gas caused by the over-limit measures taken by the ventilation - resistance increase step-by-step method, that is set in the face to return air duct wind barriers, so that the face of the machine downhill Ventilation pressure is higher than the pressure has been mining area. Gas flow to the goaf.