近距离煤柱集中应力影响下特厚煤层巷道布置技术研究

Research on Layout Technology of Extra-thick Coal Seam Roadway Influenced byConcentrated Stress of Close Coal Columns

针对近距离煤层上层采空后对下层巷道布置及支护形式产生较大影响的问题,综合考虑巷道应力及煤炭资源回收率,研究近距离特厚煤层巷道布置方式,得出在重叠布置条件下,巷道变形在可控范围内且煤炭资源回收率可大幅提升,并提出合理支护方案,确保了工作面安全生产。

Aiming at the problem that the upper goaf of the close coal column has a greater impact on the layout and support form of the lower layer roadway,the roadway stress and coal resource recovery rate are comprehensively considered,and the layout method of the extra-thick coal seam in close coal column is studied.It is concluded that in the condition of overlapping arrangement,the deformation of the roadway is within the controllable range and the recovery rate of coal resources can be greatly improved,and a reasonable support scheme is proposed to ensure the safe production of the working face.