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在扎夏吉科矿研究了开采L１煤层条件下采用向回风流添加新风的直流通风的合理性。该煤层条件下的主要瓦斯源是：位于采空区的部分回风平巷的底板和宽０．６～０．７m以内的近工作面地带。向回风流添加新风的直流通风方式具有向采空区漏风的特点，因此，向回采面回风流加进了占
The rationality of using DC draft to add fresh air to the return air flow was studied at Zhaxiajiku Mine for the exploitation of L1 coal seam. The main gas sources under the coal seam conditions are: the floor of the part of the return airways located in the goaf and the near working face with a width of 0.6-0.7m. Addition of fresh air to the return air flow DC ventilation has the characteristics of air leakage to the goaf, therefore, added to the return air back to the face accounted for