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Abstract In order to solve gas overrun in upper corner of 1209 fully mechanized working face angle roadway of Wanfeng Mine, the upper corner gas source, combining with the field condition, the application of point source extraction, the reasonable air distribution, comprehensive treatment methods, such as building wall through technology were explored, the practice proved that this method can effectively solve the problem of gas overrun in upper corner, make mining top corner gas concentration below 0.5%, guaranteed the normal recovery mining of fully mechanized working face, created the conditions to realize efficient mine safety production.
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