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沃尔库塔煤田各矿井在用无煤柱准备和开采４煤层时采区使用直流通风方式有很大的缺点。漏风通过采空区时会在采空区边界上形成沼气局部积聚或层状积聚。“沃尔库塔”矿井在７３０ｍ深度上采煤时利用此通风方法从工作面１５～３００ｍ都会出现沼气局部积聚。在分析了直流通风的
The use of DC ventilation in mining areas in the Vorkuta coal mine has major drawbacks in the preparation and mining of seam 4 with non-coal pillars. Leakage through the gob area will form a local accumulation of biogas or stratified accumulation on the boundary of the gob area. The partial accumulation of biogas occurs in the “Vorkuta” mine at a coal mining depth of 730 m using this ventilation method from the working face of 15 to 300 m. In the analysis of the DC ventilation