近距离煤层群回采巷道的支护设计

Support Design of Close Range Coal Seam Group Mining Roadway

为解决近距离煤层群在实际开采中因煤层间距过小极易导致应力集中而加剧巷道变形破坏的问题,在对2-2#煤层基本地质条件和巷道布置分析的基础上,通过调查研究掌握该工作面巷道的实际情况,并根据煤层间距为小于1m、1~3 m和大于3 m这3种情况划分支护标准,最后监测支护后的工作面顶板下沉量和两帮移近量的数据,验证支护效果。

In order to solve the problem of stress concentration and intensified roadway deformation and damage caused by small coal seam spacing in close range coal seam group during actual mining,based on the analysis of the basic geological conditions and roadway layout of the 2-2#coal seam,the actual situation of the roadway in the working face is mastered through investigation and research,and support standards are divided according to the three situations where the coal seam spacing is less than 1 m,1~3 m,and greater than 3 m,Finally,monitor the data of the subsidence of the working face roof and the displacement of the two sides after support to verify the support effect.