近距离煤层下层煤回采巷道位置优化设计

Optimization design of mining roadway in lower strata of contiguous seams

为了确定近距离煤层下层煤开采巷道合理布置位置,在确定巷道采用内错式布置形式情况下结合FLAC3D数值软件,建立了重叠、内错6m、8m、10m巷道布置模型,通过围岩变形量等参数分析,确定内错8m较为适宜;建立了宽度沿空3m、4m、5m、6m煤柱计算模型。分析可知,沿空掘巷煤柱宽度为4m。

In order to determine the rational distribution of mining roadway in lower strata of contiguous seams,combining with FLAC3 Dnumerical software,roadway layout model with 6 m,8 m,10 moverlapping and spacing is set up.Through parameters analysis of the deformation of surrounding rock,the spacing within 8 mis relatively appropriate.The calculation model of coal pillar with the width space of 3 m,4 m,5 m,6 mis established.And the analysis shows that the width of coal pillar along goaf is 4 m.