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在卡拉干达矿区,直接邻接回采工作面掘进大长度回采巷道来准备回采工作面,由于这种准备速度低,影响了矿区煤产量的增长。 保持与工作面连接处巷道的断面面积是在采空区维护回采巷道的有效方法。因为有50～60％的巷道周边的位移都发生在活跃矿压带内回采工作面线的前方。
In the Karaganda mining area, a large length of recovery roadway was drilled directly adjacent to the mining face to prepare the working face for recovery. Due to this low preparation speed, the coal production in the mining area was affected. Maintaining the cross-sectional area of the roadway connecting to the work surface is an effective way to maintain the mining roadway in the goaf. Because 50-60% of the displacement around the alleyway occurs in front of the mining face line in the active rock pressure zone.