浅析近距离下煤层大断面工作面切眼施工技术

Discussion on Cut Construction Technology of Large Section on Close Distance Coal Seam

以1205下切眼为背景,探讨了近距离下煤层大断面工作面切眼的布置、施工和支护方式。将切眼布置在1205工作面采空区下,避开了上煤层留设煤柱的应力集中区。采用分次截割,一次成巷技术,减少了巷道掘进时间,简化了施工工序,节省了材料消耗,有利于矿井采掘衔接。临时支护采用双前探梁;永久支护采用锚杆+金属网+W钢带+锚索联合支护,两帮采用锚杆+金属网+钢带支护。滞后工作面30 m使用DZ31.5型单体液压支柱配合3.6 mπ型梁进行加强支护。

Based on the cut construction of 1205, the paper discussed the layout, construction and supporting methods of largesection working face of close distance coal seams. Using sub-cut, once into the lane technology, the cut was aid under the goal of1205 face to avoid stress concentration area in coal pillar of upper coal seam, which reduced the time of roadway excavation,simplified the construction process, saved material consumption and was conducive to mine mining convergence.